AbstractDuring the transition to a market economy, many countries with a planned economy in Central and Eastern Europe face similar challenges when the established socio-economic systems and infrastructures deemed inefficient in a market economy. Also new issues are being raised by the trends of globalization and the vision of sustainable development. In the energy sector the challenges raised by the Kyoto Protocol and its implementation mechanisms are especially interesting, because they are in...
Autori: Andrius Plepys, Giulia Gervasoni, Jean-Philippe Boutin, Kes McCormick, Kristin Seyboth, Luis Mundaca, Marko Ratton, Patrick Lamers, Robert Hlep
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25104

The great variety of available Solid Waste Management System (SWMS) models, along with a plethora of continuously developing technological advancements in the design and operation of the treatment facilities and collection and transport schemes, the continous updating of national (and/or European) regulations on waste management and the increased computer literacy and availability, renders the selection of a SWMS model a complex endeavor. From the view point of a municipality, the following ques...
Autori: Demetrios Panagiotakopoulos, Konstantinia Tsilemou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25115

The use of gasoline oxygenated with MTBE (methyl tert-butyl ether) reduced significantly air pollution (16 - 23% lower emissions of CO and 18% lower emissions of unburned hydrocarbons) but increased water pollution. There is no European or national regulations for MTBE in drinking water except for Denmark, which has set a limit value of 30 Âľg/ L for MTBE. USEPA proposed a maximum concentration of 20- 40 Âľg/L. This paper is a review with 70 references on the MTBE production, use, properties and...
Autori: Camelia Beţianu, Florina Ungureanu, Loredana Branza, Lucian Vasile Pavel, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25122

AbstractLead is unique among the toxic air contaminants that the World Health Organization (WHO) has identified it in several ways. Lead concentration is increasing rapidly in the environment due to increased use in anthropic activity. Lead is released into the atmosphere from metallurgy and siderurgy industry, during coal burning, oil or wastes, from power plants which use solid fuel, from traffic and the building sites. Regardless the exposure mode, the presence of lead in urban air, even in r...
Autori: Alina Murariu, Aurelia Meghea, Aurelian Stanescu, Ioana Lacatusu, Mihaela Mihai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25205

Contain all the articles from this issueEditorialEstablishing effluent discharge limits - have we got it right?Yusuf Chisti Full papersSurvey on the treatment of gaseous streams containing volatile organic compoundsOana Penciu, Maria GavrilescuEU environmental policy for industrial pollution control. IPPC DirectiveElena Bobu Environmental monitoring Antonius A.F. KettrupProcess The sonochemical degradationof cyanide ions using atmospheric oxygen as oxidizing agentIoan Iordache, Mircea Teodor Nec...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25171

AbstractThe formation of the polyelectrolyte- surfactant complexes has been studied. On this purpose has been measured the critical micelle concentration for every polyelectrolyte and surfactant which had been used. The phase behaviour of mixtures of a cationic polyelectrolyte (Praestol 611) and an anionic surfactant (sodium lauryl sulphate - SLS) has been studied. For a given polyelectrolyte concentration, with increasing surfactant concentration, three phase regions were identified. The first ...
Autori: Cristina Costache, Gabriel Dabija, Mihaela Mihai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25214

AbstractThis paper discusses the applications of synthetic PONILIT GT-2 anionic polyelectrolyte as soil conditioning agent into a site with high electric field around. All experimental data conclude that the use of a polymeric conditioning agent was increased the soil ability to support vegetation expressed as germination degree for some grass species (e.g., Raigras aristat). The performed values for germination degree increase from 3.05 % to 12.20 % when was added fertilized soil, and respectiv...
Autori: Carmen Zaharia, Ioan Ivanov Dospinescu, Matei Macoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25225

AbstractThe disinfection of water containing microorganisms by exposure to pulsed-discharge plasma using a low-temperature gas-liquid hybrid discharge (HD) reactor was studied.The HD reactor consists of a plexiglas cylinder containing the liquid of high voltage electrode above liquid' s surface and grounded electrode submerged in the liquid. The HD could produce both arc discharges in gas and liquid phases. The high-energy plasma arc produces a pressure shock wave, which kills the targeted micro...
Autori: Gamal M. El-Aragi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25242

AbstractDespite its well known toxic effects, lead continues to be a part of modern life. Lead concentrations in the environment have increased steadily throughout history, with a huge increase when lead became a common additive to paint and gasoline. Although the use of lead in gasoline and most paint has been banned in many countries, there are still many ways for lead to be released on the environment. The effects of lead on human health have been the subject of significant international exam...
Autori: Alina Murariu, Aurelia Meghea, Ioana Lacatusu, Mihaela Mihai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25244

AbstractThe study on distribution of oxygen transfer rate for a stirred bioreactor and simulated broths was carried out for four positions inside the broth and indicated the significant variation of kla on the bioreactor height. For all considered positions, kla initially increased to a maximum value with mixing intensification, decreasing then, as the result of the modification of mixing mechanism in presence of air bubbles. The increase of broth viscosity led to the significantly reducing of o...
Autori: Adina Segneanu, Anca-Irina Galaction, Dan Caşcaval, Radu Z. Tudose
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25270

AbstractIn India, transportation sector is growing fast and the number of vehicles on Indian roads is increasing at a rate more than 7 percent a year. During the period of 50 years from 1951 to 2001, the number of vehicles has increased from 0.3 million to 43 million i.e. an increase of almost 143 times. This has led to overcrowded roads and noise pollution. The transportation sector is one of the major contributors to noise in urban areas, accounting to as much as 55 percent of total noise on t...
Autori: Arvind Kumar Shukla, Jyoti Bhushan Srivastava, Manoranjan Parida, Sukhvir Singh Jain
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25279

AbstractThe evaluation of the occupational risk represents an operation whose purpose is to assess the risk for accidents and occupational diseases which can occur during the development of some hazards produced by human activities inside the working system, with the view to giving a qualitative and a quantitative size of this element.In the study, mathematical patterns are developed to be used for laying foundations of modern methods for the analysis and assessment of occupational risks. The sc...
Autori: Angelica Nicoleta Draghici, Constantin Baciu, Gabriel Dragoş Vasilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25280

AbstractBiosorption an alternative process is the uptake of heavy metals from aqueous solutions by biological materials. The biosorption of nickel ions from aqueous solution was investigated by Nordmann fir (Abies nordmanniana (Stev.) Spach. subsp. nordmanniana) in a batch adsorption system as a function of pH, initial metal concentration, biomass dosage, contact time. The data showed that the maximum pH for efficient sorption of Ni(II) was 6.5. At the optimal conditions, Ni(II) ion biosorption ...
Autori: Handan Ucun, Ozkan Aksakal, Yusuf Kaya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25295

AbstractThe purpose of this study was to investigate the immobilization of denitrifying bacteria on microbial cellulose (MC) for biological denitrification. A novel denitrifying bacterium, Pseudomonas stutzeri, was immobilized in microbial cellulose and introduced into an up flow packed bed reactor in order to remove nitrate from synthetic influent. The MC presented the high biomass concentration throughout the experiment, achieving 3.4 mg biomass/g support. The efficiency of the system for deni...
Autori: Abbas Rezaee, Hatam Godini, Hossein Bakhtou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25302

AbstractMilk products are a very important human nutrient since their consumption has increased in recent years. Good quality measurements are essential to control and maintain milk products and processes quality, both in manufacturing, trade and in research. The presence of toxic elements in powdered and liquid milk may create significant health problems for people. The aim of this paper was to determine the content of major and minor elements in different milk samples, sold in major supermarke...
Autori: Alina Soceanu, Gabriela Stanciu, , Simona Dobrinas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25320

AbstractThe occupational safety is that state of the working system where there is no possibility that occupational accidentsand diseases should occur. Considering the specific features of the component elements there are no such full safe working systems for men because there is always a hazard of occupational accidents and diseases.Generally speaking, all the component parts of the system, together with the relations built among them have beenconceived, designed and produced so that there is n...
Autori: Constantin Baciu, Gabriel Dragoş Vasilescu, Valeriu Plesea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25322

AbstractSince public concerns about the environmental issues have increased, several universities all over the world have been establishing environmental engineering programs. Environmental engineering programs in Iran at graduate level have been developed since 1990. At the present time, there are ten universities are presenting environmental engineering programs at graduate levels. The environmental engineering education systems of almost all Iran universities are quite traditional. As the env...
Autori: Ahmad Tahershamsi, , Reza Maknoon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25324

AbstractGroundwater is an important source of drinking water, especially for rural population. In the last years, bacteria, nitrate, organic chemicals and other pollutants existing in groundwater have increased public concern about the quality of groundwater. Groundwater provides about 22% of all freshwater withdrawals; 37% of agricultural use (mostly for irrigation); 37% of the public water supply withdrawals; 51% of all drinking water for the total population and 99% of drinking water for the ...
Autori: Ancuţa Rotaru, Paulica Raileanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25329

AbstractThe paper presents the main causes of the sea accidents and disasters, which call for the implementation of a sea pollution and safety management system (SMS) in the navigation companies, for certification purposes, in compliance with the International Management Code for the safe vessel operation and pollution prevention (ISM). For this purpose the objectives of the ISM codes are presented and which are to be found in the implemented Management System.From the main causes of the safety ...
Autori: Carmen Gasparotti, Lucian Georgescu, Mirela Voiculescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25330

AbstractThe removal of Acid Red 398 (AR398) dye from dye-containing solution using coagulation/flocculation process with polyaluminum chloride (PAC) and Alum was investigated. The effect of different parameters involving pH, dosage of coagulant, initial dye concentration, and bentonite as a natural coagulant aid was examined. According to the obtained results, the optimum pH, at which the maximum removal occurred, was about 4 and 5 for PAC and Alum, respectively. However, PAC performed efficient...
Autori: Maryam Hasani Zonoozi, , Mokhtar Arami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25335

Include urmatoarele articole:� Composite membranes with cross-linked matrimid selective layer for gas separation� Determination of organic compounds from different types of coffee by Hplc and Gc-Ecd analysis� An integrated assessment of the suitability of domestic solar still as a viable safe water technology for India� Investigations on the possibility of natural hemp fibers use for Zn(II) ions removal from wastewaters� Removal of acid red 398 dye from aqueous solutions by coagulation...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25340

AbstractAn efficient design and development of the occupational health and safety managing system in a working system involves a suitable tailoring of occupational health and safety state in relation to the risk level associated to the conditions for the occurrence of general and specific hazards all through its length of operation.This paper presents a methodological approach for the analysis and for a likelihood estimate of industrial risks identified inside complex structures of the working s...
Autori: Constantin Baciu, Gabriel Dragoş Vasilescu, Tiberiu Attila Csaszar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25347

AbstractIndia possesses a diverse and rich cultural heritage and is renowned as a 'land of festivals'. These festivals attract massive community involvement paving way to new materials such as 'Plaster of Paris' being used for 'modernizing' the representation of idols with very little thought given to the issues of toxicity and environmental impacts. Another dimension to the whole issue is the plight of the artisans and the workers involved in the trade. Owing to the unorganized nature of the in...
Autori: Nanda B. S. Kumar, Raghunath Babu Are, Santosh M. Avvannavar, Shrihari Surathal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25349

AbstractThe paper presents an original method, as well as a calculus mode of the main hydraulic parameters, for the transfer of the aeolian power from the nacelle of the tower to its base. The system proposes the existence in the nacelle of a two-, three- or poly- phased sonic generator, from which the obtained energy is transferred by some pipes to the base of the tower, where this can be easily  transformed in electric energy. The paper treats the two-phase variant. An important consequen...
Autori: Ioan I. Pop, Ioana Denes-Pop
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25356

AbstractAn experimental three-stage subsurface flow constructed wetland system was investigated for the removal of nutrient and organic matter from primary-treated domestic wastewater. Built in the Turkey Scientific and Technical Research Council-Marmara Research Center, Gebze, Turkey (Istanbul), the system consisted of a vertical flow-gravel filtration in the first stage, a horizontalsubsurface flow bed vegetated with Iris in the second stage, and a vertical-subsurface flow bed vegetated Phragm...
Autori: Bilal Tuncsiper
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25358

AbstractThe study on the distribution of oxygen transfer rate in a stirred bioreactor for Propionibacterium shermanii broths underlined the major influence of the presence and concentration of biomass on the interphasic transfer of oxygen. Owing to the bubbles surface blockage by the bacterial cells, the accumulation of biomass from 30.5 to 120.5 g/l d.w. led to the decreasing of kla for about 1.3- 2.4 times. Compared with the simulated broths without biomass having similar apparent viscosity, t...
Autori: Adina Segneanu, Anca-Irina Galaction, Dan Caşcaval
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25364

Include urmatoarele articole:� CsHSO4/mesoporous silica composites - new electrolytes for solid acid fuel cells� Trend in exhaust emissions from in-use gasoline vehicles� Analysis of distribution of oxygen transfer rate in stirred bioreactors for bacterial broths� Electrochemical characteristics of Ti6Al7Nb alloy in Ringer's solution� Pulsed high voltage discharge technology as a new method for killing Hepatitis C virus (HCV) cells� Hydrodynamic modelling of pollution with LNAPL gene...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25367

â€? Bioremediation of contaminated air using a bioscrubberâ€? Quality risk evaluation of the groundwater resources on the moldavian areaâ€? Electrochemical characterization of some dental materials in accelerated environmental testingâ€? Preliminary study of simple and Fenton oxidation with hydrogen peroxide applied on final effluents from a zootechnical farmâ€? The environmental impact assessment caused by the dykes failureâ€? Revaluation of beer industry byproducts – medical implicationsâ€? ...
Autori: http://www.ecozone.ro/reviste.php?RID=25372

Abstract Human exposure to heavy metals requires special surveillance measures on these elements in human body in order to detect a relation between heavy metal exposure and adverse health effects. The aim of this paper is focused on biomonitoring contamination with heavy metals in fish foodstuffs and in blood, and corroboration of contaminant levels with immunotoxicological effects on target groups of consumers. The final goal is to establish some recommendations on human diet with fish food...
Autori: Aurelia Meghea, Alina Murariu, Cristina Tanase, Eleonora Codorean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25398

Abstract Protection of plants from diseases, pests and weeds plays a decisive role in agricultural development, as an essential part in planning and policy of numerous countries. Since the plant protection products are mainly chemicals and may be not only poisonous for humans and fauna, but they may also pollute water bodies, ground water and soil with hazardous pollutants, their use have to be environmentally friendly and sustainable. The paper discuss some aspects of benefits and risks con...
Autori: Manuela Olga Pogăcean, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25405

Abstract The preparation of microspheres containing chitosan, sodium alginate and ibuprofen and the pH dependent drug release were investigated. The microspheres were prepared by two experimental routes: the first one starting with a chitosan/ibuprofen core subsequently coated by an alginate shell (S1) and the second one based on an alginate/ibuprofen core, later coated by a chitosan layer (S2). The physical-chemical characterization was done by using Dynamic Light Scattering (DLS), Atomic Fo...
Autori: Luminiţa Elena Balău, Nicolae Aelenei, Marcel Ionel Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25412

Abstract As the prevention of the risks is one of the major stakes of any industrial activity, a priori, the evaluation of these risks constitutes one of the principal progress levers of the risks prevention step at a company. It is an opportunity to engage a prevention step in order to preserve health and to improve the employees' safety at work. However, as the companies are increasingly concerned of hygiene and quality, health at the work should be taken into account with the same interest...
Autori: Ghania Chaib, Rachid Chaib, Ion Verzea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25423

Abstract Transition to a more sustainable economy and the consequences of the Kyoto protocol on global climate change, includes a shift of feedstock for energy and chemical industries from fossil fuels and petrochemicals to renewable resources. The use of vegetal fibers as major source of renewable resources represents a valuable alternative both from economical and environmental points of view. Traditionally, vegetal fibers are widely used in textile industry, paper manufacture, and packagin...
Autori: Dan Gavrilescu, Bogdan Marian Tofanica, Adrian Catalin Puitel, Puiu Petrea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25431

Abstract The European annual consumption of plastic materials has increased from 24.6 Mtons in 1993 to 39.7 M tons in 2003 and it is likely to keep growing. Europe is faced with the challenge of managing millions of tons of waste plastics. At the same time, polymer recyclers and manufacturing industries do not find enough secondary polymers of consistent quality. Plastics production and use has a range of environmental impacts because of the considerable quantity of resources needed as raw ma...
Autori: Peter Rem, Venga Solaria, Francesco Di Maio
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25444

Abstract The paper approaches the environment issue in the context of welding fabrication processes. The introduction presents, synthetically, the place and dimension of welding in the manufacturing industry. Negative aspects regarding the image of weldingdue to the impact on the environment are identified. The driving factors and the main development trends of environmentalfriendly welding processes are analyzed. An action program to change the image of welding from the present "3 D - Dirty,...
Autori: Dorin Dehelean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25445

Abstract Mesoporosity of about 7 nm in ETS-10 titanosilicate was generated by postsynthesis treatment with hydrogen peroxide under microwave irradiation, resulting in an increased external surface area of the materials (55 m2/g). The influence of titanosilicate porosity and its surface modification by phosphorus atoms (ET(P)S-10) on the retention of some nanoions (??-emitting radioactive U(VI) and Th(IV) ions) and biomolecules (the proteins cytochrome c, papain, and ??-globulin) was investiga...
Autori: Robert Gradinaru, Sorin O. Valu, Stefan Postolache, Claudiu C. Pavel, Ion Sandu, Karin Popa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25455

Abstract The studies of Cu (II) adsorption were conducted by testing various sawdust types. Two biomass, oak sawdust wood (Querqus robur) and white poplar sawdust wood (Populus alba), have been compared considering their efficiency for copper removal from diluted water solutions. Raw sawdust proved no efficiency in adsorption. Therefore, pre-treatment processes were developed and optimized, to enhance the sawdust affinity for heavy metals adsorption. The optimized pre-treatment conditions are...
Autori: Dora Lucaci, Anca Duta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25460

Abstract It is known that carbonhydrates are precursors of all bioactive substances we tried in thes paper work to do some investigation on these substances in the environmental area of Iasi. To observe the influence of some chemical mutagens substances on carbohydrates biosynthesis we conducted investigations on plant material (leaves) taken from the Calendula officinalis L species. We used this assay to examine the effects of the herbicide 2,4- dichlorophenoxyacetic acid (2,4-D), etidium br...
Autori: Constantin Leonte, Roxana Vatavu, Teodor Robu, Irina Volf
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25502

Abstract Recovered paper is a valuable raw material for the paper industry at global level. Paper made from recovered paper reduces the demand on forests, uses less energy, water and chemicals, produces less toxic releases and reduces solid wastes that must be landfilled or incinerated. This paper is mainly aiming to analyze the driving forces for sustainable use of recovered paper and to discuss the benefits of recovered paper use on paper and board production, as well as on the environment....
Autori: Dan Gavrilescu, Elena Bobu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25528

Abstract The constructed wetlands are considered as a low-cost alternative system for nitrogen removal. Shale was selected as a media in constructed wetlands, on the basis of adsorption capacity and suitability for plant growth. The specific objective of this study was to evaluate nitrogen adsorption capacity for using as a media in constructed wetlands. Shale was sieved into 5 particle sizes Shale A-E. The physical and chemical characteristics of shale showed that it is suitable to be use as...
Autori: Amara Daothaisong, Jareeya Yimrattanabovorn
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25535

Abstract Chlorophenols are contaminants in soils, sediments, surface waters and groundwater, largely because of their worldwide utilization in the last 50 years as wood preservatives and general biocides in industry and agriculture. The toxicity of chlorophenols and their persistence in the environment require advanced treatment techniques for their removal. Surfactant-modified natural zeolites (SMZs) represent an important class of sorbents for water treatment. This work presents a comparat...
Autori: Roxana Elena Apreutesei, Cezar Catrinescu, Adrian Ungureanu,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25537

Abstract Nowadays the global climate change is one of the most significant questions from environmental, social, political and economic point of views. Global warming caused by green house gases emitted into the air is a result of the human activities (Energy Revolution, 2005-2007). The majority of the industrial processes has significant impact to human life and deteriorates the natural environment. In this paper different technologies (three industrial technologies) will be dealt with spec...
Autori: Zsofia Kovacs, Orsolya Kakucs, Janos Lako, , Tamas Fulop, Tatiana Yuzhakova, , Endre Domokos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25545

Abstract The paper examines the effects of high temperature corrosion of the surfaces of heat exchange due to corrosive components formed in the co-combustion of biomass and coal. High temperature corrosion of the surfaces of heat exchange becomes a priority in the combustion of biomass with high chlorine and alkali metals, as alkali chlorides formed deposited on the surfaces of heat transfer, leading to serious consequences for them. Forms of manifestation of corrosion are numerous, the most...
Autori: Ionel Pisa, Corina Rădulescu, Lucian Mihăescu, Gheorghe Lăzăroiu, Gabriel Negreanu, Simona Zamfir, Danut Vairenu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25553

Abstract Commercial pure titanium (Cp-Ti) and titanium alloys are used on large scale in restorative dentistry due to their advantages as compared with other similar materials: chemical inertia, low density, high strength, high corrosion resistance in biological media and increased biocompatibility.The effect of fluoride and pH on the corrosion behaviour of Cp-Ti and a new Ti50Ta alloy were examined by open circuit potential (EOC) measurement, linear polarization, potentiodynamic polarization...
Autori: Daniel Mareci, Daniel Sutiman, Georgiana Ciurescu, Igor Creţescu, Romeo Chelariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25591

Abstract This paper presents a portable device for rapid preparation of samples, in situ, in order to facilitate the detection and identification of toxic substances. This product is for research and provides increased sensitivity NBC detection equipment (ion mobility spectrometers, indicated tubes), and decreasing the time needed for preparation solid and liquid samples to identify toxic substances by spectrometric techniques (gas chromatography with mass spectrometry). It is used especially...
Autori: Alexandru Bobes, Aurica Dumitrescu, Doru Alexe, Gabriel Epure, Liliana Rece, Nicoleta Petrea, Petrisor Zamora Iordache, Razvan Petre, Vasile Somoghi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25595

Abstract The aim of this study was to assess nitrate removal using impregnated activated carbon (AC) with MgCl2. After impregnating of AC using heat treatment, the MgCl2 is converted to efficient MgO. The denitrification was conducted at pH 6.2, 25?C, and initial concentrations of 20 mg/L nitrate-N. The effects of the operating parameters including AC dosage, pH, and contact time have been investigated. Experimental data show that AC modified by MgCl2 was more effective than virgin AC for nit...
Autori: Abbas Rezaee, Hatam Godini, Sahand Jorfi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25618

Abstract The adsorption behavior of bael tree (BT) leaf powder for cadmium ions from aqueous solutions has been investigated as a function of appropriate equilibrium time, adsorbent dose, adsorbate concentrations and pH using a batch system. Studies showed that the pH of aqueous solutions affected cadmium removal as a result of the fact that removal efficiency increased with increasing solution pH. The maximum adsorption was 93.56% at solution pH equal to 6.0, contact time of 30 min and initi...
Autori: Ponnusamy Senthilkumar, Rangasamy Gayathri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25621

Abstract In this study, the effect of adding granular activated carbon (GAC) to aerobic sequencing batch reactor (SBR) on possibility to treat a wastewater containing a reactive dye (Brill Blue KN-R) was investigated. Experiments were performed in four cylindrical Plexiglas reactors for 68 days (5 days for acclimatization of sludge and 63 days for normal operation in two separate phases). Initial dye concentrations were adjusted to 20, 25, 30 and 40 mg/L in the reactors R1, R2, R3 and R4, res...
Autori: Amir Asadi Vaigan, Hossein Hashemi, Mohammad Reza Alavi Moghaddam
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25624

Abstract Finding solutions to the waste problems generated by human activity represents a high concern of authorities and environment specialists for many years. Furthermore, energy conservation and reduction of the dependency from fossil fuels represents a top priority of governmental organizations at world level. The developments in alcohol industry have resulted in the increase of wastewaters which are highly polluted with organic substances, causing environmental pollution hazards. A wide...
Autori: Carmen Mateescu, Ionel Constantinescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25626

The combustion process plays the important role to improve performance and emission of diesel engine. To improve the rate of combustion process, the fuel-air mixing process should be accelerated. In this paper, based on the Double Swirl combustion chamber, from the macroscopic characteristics and simulation analysis, the effect of the incylinder forced swirls on performance and emission of diesel engine was studied. The results indicated that due to the incylinder forced swirls, the distribution...
Autori: Chang-Yuan Wang, Fu-Shui Liu, Xiang-Rong Lihttp://www.ecozone.ro/reviste.php?RID=25673

The removal efficiency of p-xylene from gas stream was experimentally investigated in a dielectric barrier discharge (DBD) reactor, which was combined with catalyst, MnO2/Al2O3 pellets, in the discharging and the afterglow area, respectively. The CO2 selectivity of the two kinds of structure was also discussed. The results showed that in both the situation, the synergetic removal efficiency of p-xylene by the DBD-catalyst hybrid system increased with increasing the discharge power and decreasing...
Autori: Hongxia Liu, Yun Liuhttp://www.ecozone.ro/reviste.php?RID=25674

This study was aimed to explore root spatial distributions on the different sizes of belt spaces in the caragana-grass compound system in Siziwangqi county, Inner Mongolia. The root spatial distributions were observed at selected typical sample plots within the 5m, 10m and 16 m belt-space caragana - grass compound systems. The area of roots spatial distributions were highly correlated with the caragana-grass compound system belt space. Root distribution area was found to decrease with soil depth...
Autori: Yongjun De, Huijun An, Qiuju Guo, Dongmei Ye, Liansheng Guohttp://www.ecozone.ro/reviste.php?RID=25681

Acidithiobacillus ferrooxidans plays an important role in the pyrite oxidation process and has been widely studied in order to determine the kinetics of the reactions, but the details of the oxidation processes on the surface of pyrite keeps poorly known. In this study, the bio-oxidation process of pyrite by Acidithiobacillus ferrooxidans was studied by comparing with abiotic oxidation by Fe3+. The attachment of Acidithiobacillus ferrooxidans on pyrite surface was found by using Scanning Electro...
Autori: Lei Jiang, Huiqun Yang, Yuruo Tao, Jinyan Yanghttp://www.ecozone.ro/reviste.php?RID=25686

Our investigation in 2007 revealed that the concentration of microcystin (MC-LR) in Miyun reservoir was 0.224 μg L-1, below the safety limit of surface drinking water in China (1.0 μg L-1). The phytoplankton community in Miyun reservoir was composed of 8 divisions and 84 species (including genera and varieties). The density of phytoplangkton was 393.71?—104 cells L-1 including 24.6% of Chlorophyta, 32.5% of Cyanophyta and 15.3% of Bacillariophyta. The toxin-producing cyanobacteria incl...
Autori: Huimin Li, Guisen Du, Yumei Wu, Dianwei Wu, Jingshi Wanghttp://www.ecozone.ro/reviste.php?RID=25691

Chlorine dioxide (ClO2) is widely used as disinfectant in tertiary sewage treatment process. In order to identify the impact of disinfection with ClO2 on treated water quality, secondary effluent pretreated by coagulation was disinfected by ClO2, and the characteristic of dissolved organic matter (DOM) and the biological toxicity of the water before and after disinfection were investigated. The results showed that ClO2 could remove part of DOM and the removal rate of hydrophobic (HO) component b...
Autori: Lihua Cheng, Xuejun Bi, Aihua He, Changqing Liu, Qi Wang, Zuliang Liaohttp://www.ecozone.ro/reviste.php?RID=25692

Considering the membrane fouling problem in submerged anaerobic membrane bioreactors, a set of submerged double-shaft rotary anaerobic membrane bioreactor (SDRAnMBR) was constructed by applying a double-shaft rotary module to submerged anaerobic bioreactor, and the theoretic analysis of the characteristics of hydraulics dynamics in SDRAnMBR has been performed. The membrane fouling performance for treatment of synthetic brewery wastewater was investigated by SDRAnMBR. The results of a theoretical...
Autori: Ling Bai, Chao Liu, Weiguang Lanhttp://www.ecozone.ro/reviste.php?RID=25694

A submerged membrane bioreactor (MBR) was employed to treat wastewater containing different content of seawater in this work. During the process, the operating conditions were as follows: COD was 800-1000 mg/L, ammonium-N was 80-100 mg/L, pH was 7.5-8.5, mixed liquor suspended solids (MLSS) was around 7000 mg/L, dissolved oxygen (DO) was 2-4 mg/L. The results showed that the ammonium-N removal was better than COD removal. Sludge settling property was good in saline wastewater treatment, and the ...
Autori: Jin Li, Deshuang Yu, Dan Wanghttp://www.ecozone.ro/reviste.php?RID=25697

The solubility and sorption behavior of naphthalene in the presence of dissolved organic acid was studied. The presence of dissolved organic acids at lower concentrations had only a little effect on naphthalene sorption. However, when the concentration exceeds a certain concentration, a significant inhibition was observed. Moreover, the inhibition enhanced with the increasing concentrations of dissolved organic acids. The change trend on solubility is similar to the sorption of naphthalene, that...
Autori: Jin hua Li, Bao xue Zhou, Qing Zheng, Wei min Caihttp://www.ecozone.ro/reviste.php?RID=25698

This study investigated the effectiveness of using anaerobic effluent as a nutrient supplement for cultivation of green algae Chlorella sp. Different concentration of 0%, 15%, 30%, 45%, 60%, 75%, 90% and 100% which were raw (group �r�) as well as autoclaved (group �a�) were applied to the anaerobic effluent and algae growth. They were compared in terms of growth rate and final algae biomass production. In the initial cultivation days, slower growth rates with an increased anaerobic efflu...
Autori: Yubi Chen, Renjie Dong, Gaojun Peng, Zhu Yi, Shuhao Huo, Yupeng Liu, Changle Panghttp://www.ecozone.ro/reviste.php?RID=25701

Adding ferric or bio-ferric agent is method to improve membrane fouling and prolong membrane life.This paper analyses the influence of ferric content on treatment effect of printing and dyeing wastewater, through examining the change of COD and dyestuff content in supernatant with the change of ferric content in sludge and in supernatant. COD in supernatant is reduced with increase of ferric content in sludge, and the dyestuff content in supernatant is reversed, which might be due to the adsorpt...
Autori: Shifeng Ji, Chunmei Gao, Hong Yang, Ming Chu, Chunfeng Wanghttp://www.ecozone.ro/reviste.php?RID=25711

This paper presents a study of the numerical simulation applied for unsymmetrical dimethylhrazine (UDMH) gas dispersion. This study considers an assumed UDMH store conditions and provides important data regarding the relation between the concentration distribution of UDMH and dispersion distance from the source based on the computation fluid dynamic (CFD) software FLUENT. The simulation results show that the ventilation vent and distance of dispersion play an important role in the concentration ...
Autori: Zhiyong Huang, Guofeng Jin, Xuanjun Wanghttp://www.ecozone.ro/reviste.php?RID=25712

Chemical composition data of coalbed produced water can provide information to determine the water sources, understand the evolution, select appropriate treatment processes and increase the utilization efficiency of water resources. Based on methods of hydrogeology, water chemistry and environmental chemistry, the characters of coalbed produced water in the Powder River Basin in the USA and Qinshui Basin in China have been analyzed. Conclusions have been drawn as follows: (1) The coalbed produce...
Autori: Guang Xu, Li Tong, Mei Yang, Yi-wen Juhttp://www.ecozone.ro/reviste.php?RID=25715

Abstract:An efficient conversion of kinetic energy of river waters into mechanical or electrical energy without building barrages isprovided by micro-hydropower stations. Increased efficiency is achieved by an optimum position of the blades withhydrodynamic profile. The formulation used to compute the hydrodynamic forces is an inviscid - boundary layer model. Microhydropowerstation provides kinetic energy conversion of river water into mechanical or electrical energy without buildingbarrages. In...
Autori: Anatol Sochireanu, Ion Bostan, Ion Dicusară, Nicolae Trifan, Oleg Ciobanu, Radu Ciobanu, Valeriu Dulgheru, Viorel Bostan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25723

Abstract:This work concerns studies related to strategic development of products in which bio-based plastics are or will be applied, referredto as bio-based products. The studies cover (1) current and potential benefits of bio-based products in extended value chainsincluding activities after end-of-life of products, (2) value communication between stakeholders in extended value chains, and (3)creating an integrated development approach for optimized bio-based products. Most existing models for v...
Autori: J.W. Lin, Jarmila Kopecká, Kim Ragaert, Ludwig Cardon, Maarten De Groote, Rolf Koster
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25728

Abstract:In this paper, the influence of two types of imidazolium-based ionic liquids (ILs) on the properties of sycamore maple (Acer pseudoplatanus) veneers, at 25 0C, 60 0C and 80 0C has been studied by using contact angle measurements and Fourier transform infrared spectroscopy analysis. The measurements showed that wood wettabillity is increased by IL treatment. It has been determined that the ILs decrease the crystallinity and improve the flexibility of the cellulose matrix. Also, it has be...
Autori: Attila Porzsolt, Catalin Croitoru, Christian Friedrich, Silvia Patachia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25737

Abstract:The paper aims to present the new pattern of modular agriculture, as evolution of agri-food production in the coming decades aswell as to highlight the direct relation between this pattern and the massive energy support it requires.The paper basically deals with reactions to climate change, reductions of carbon emission, in addition to high quality and safetyrequirements for food production. The author envisages the PAC measures called for in order to ensure a sustainable developmentof ...
Autori: Romulus Gruia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25746

Abstract:The study involved investigating the effects of Cr(III) and the efficacy of powdered activated carbon (PAC) in reducing theinhibitory effects of Cr(III) on activated sludge under sequencing batch reactor (SBR) operation. The addition of Cr(III) into SBRsystem caused significant inhibitory effects on the activity of activated sludge as indicated by drastic drop in specific oxygenuptake rate (SOUR). The increase of Cr(III) concentration from 5 to 10 mg/L further deteriorated the treatment...
Autori: Eiichi Toorisaka, Makoto Hirata, Soon-An Ong, Tadashi Hano
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25773

Abstract:This study aimed to assess the coagulation performance using simple aluminum sulfate (Alum) and pre-hydrolyzed polyaluminumchloride (PACl) coagulation agents by conventional global parameters, i.e., turbidity and organic matter expressed by totalorganic carbon (TOC) and chemical oxygen demand (COD), and non-conventional spectrophotometric parameters.Non-conventional spectrophotometric parameters, expressed as absorbance recorded at different wavelengths, i.e., A254, A280,A365, allowed d...
Autori: Florica Manea, Georgeta Burtică, Ilie Pisoi, Smaranda Masu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25777

Abstract:In this paper, the mathematical model is improved by considering the density variations of the liquid from the pollution source vs.pollutant’s concentration of this liquid and by including the sorption-desorption term (SDT), which takes into account thisphysical process, played by a first-order decay model defined by two coefficients and an exponent. In order to practically use thisimproved mathematical model, the authors inferred the calculating relationships from automatic processin...
Autori: Daniel Bucur, Esmeralda Chiorescu, Gheorghe Ţigaret
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25783

Abstact:0.5 - 2.0% CuO-doped ZnO (CuO-ZnO) photocatalysts were prepared with a simple mixing method where the oxides wereinitially synthesized through precipitation. The physico-chemical properties of CuO-doped ZnO photocatalysts were studied viaXRD, TEM, XRF and BET method and their photoactivity was evaluated by degrading methyl orange (MO) dye. The propertiesof ZnO were not affected by the addition of CuO except for the particle size of the photocatalyst, which increased proportionallywith Cu...
Autori: Abdul Halim Abdullah, Md. Jelas Haron, Nor Zafirah Razali
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25785

Abstract:One of the basic conditions for the operation of nuclear installations is security operation. The complexity of the phenomena inheavy water detritiation plants, determine the use of advanced equipment for technological processes involved. Pilot Plant forTritium and Deuterium Separation developed the cryogenic technology of tritium separation from tritiated heavy water. Theprocess is based on an catalyzed isotopic exchange module, where the tritium is extracted from tritiated heavy water...
Autori: Sorin Gherghinescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25787

Abstract:Alkaline protease from Conidiobolus coronatus which is optimally active at pH 10 and 40°C finds application in leather and detergent industries as well as for recovery of silver from waste photographic films. The protease was immobilized in Ca-alginate, polyacrylamide gel and alkali treated waste fungal biomass (ATWFB). ATWFB was found to be most suitable among the matrices tested. Glutaraldehyde marginally increased the binding to ATWFB. Binding of protease to ATWFB seems to be through...
Autori: Ryali Seeta Laxman, Shiv Shankar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25807

Abstract:The effect of organic carbon loadings (OCLs) on NH4+-N and Mn2+ removal was investigated using a novel approach of biological aerated filter (BAF) for drinking water treatment system. Three different OCLs of 0.2, 0.5 and 1.0 kg COD/m3.d were loaded into BAF which was operated in batch-wise at 24 h hydraulic retention time. The experiments resulted in higher COD, NH4+-N and Mn2+ removal percentages at OCL of 1.0 kg COD/m3.d with removal of 97.1%, 97.4% and 94.7%, respectively. The +-N ef...
Autori: Hassimi Abu Hasan, Noorhisham Tan Kofli, Siti Kartom Kamarudin, Siti Rozaimah Sheikh Abdullah
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25808

An increased level of environmental awareness by consumers has caused marketing to pay special attention to the deteriorating environment. This is a consequence of markets punishing those companies that fail to consider environmental concerns in their marketing efforts. However, how environmental proactivity is integrated into marketing strategy has been scarcely analyzed in the marketing literature. The present paper aims to fill this gap in the literature by theoretically analyzing the ways in...
Autori: José-Felipe Jiménez-Guerrero, Juan Carlos Gázquez-Abad, Juan-Antonio Mondejar-Jimenez, María Cordente-Rodríguez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25815

Increased intensity of precipitation events in a future climate provide result in a number of regions with improved, more detailed models. Many mathematical models include this part of hydrological cycle with implications regarding the climatic changes. The case study shows aspects regarding the climatic changes and its impact on designing the hydraulic structures and the hydrotechnical constructions behaviour in the case of extreme hydro-meteorological phenomena....
Autori: Catrinel-Raluca Giurma-Handley, Ioan Crăciun, Ion Giurma, , Valentin Boboc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25836

Abstract:The concept of sustainable development has become an important objective for policy makers, since the key principle ofsustainable development understands the interdependence between economy, environment and society concerns.The objective of this study is to analyze the supports for sustainable environmental remediation, considering sustainabilityindicators and sustainable remediation practices, based on both methods that are known for a long time as well as emergentprocesses and technol...
Autori: Isabela Maria Simion, Maria Emiliana Fortuna, Maria Gavrilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25837

The purpose of this study was to prepare new nanocomposite catalysts of Metal/LDHs type by mild reduction of transition metal cations Co2+ and Cu2+ substituted in the matrix of ZnAl-LDH at 150°C and atmospheric pressure, under hydrogen flow. To this end, a series of ZnCuCoAl layered double hydroxides (LDH) precursors were synthesized by co-precipitation method. M2+/M3+ (i.e., Zn2+/Al3+) molar ratios were kept constant while the Cu2+/Co2+ molar ratios were varied in order to investigate their in...
Autori: Adrian Ungureanu, Alexandra Sasu, Alexandru Chirieac, Alina Moscu Corcodel, Brindusa Dragoi, Constantin Rudolf, Emil Dumitriu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25852

The first part of this work presents the development and implementation in the Benchmark Simulation Model No 1 (BSM1) of a modified Activated Sludge Model No 3 (ASM3). The enhanced ASM3 presented in this study has three modifications compared to the original ASM3. The first modification is the representation of the simultaneous heterotrophic biomass growth on the primary substrate and on the internal storage products. Second, nitrification is modeled as a two-step process with nitrite as an inte...
Autori: George Simion Ostace, Paul Şerban Agachi, Vasile Mircea Cristea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25865

The most important argument of this experiment was to demonstrate an increased content of active principles under the influence of some substances (considered in the literature as mutagene), when used in low concentration, do not affect the environment. The purpose of this study was the selection of some treatment variants, which, during the experimentations show the same biosynthetic potential, stabilized or increased. The substances used in the experiment were ethidium bromide at the concentra...
Autori: Constantin Leonte, Marius Zaharia, Roxana Vatavu, Teodor Robu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25867

The nitrogen and phosphorus management in agricultural systems leads to an increased input of plant nutrients and sustains the soil fertility. Microbes contribute through different mechanisms to nutrient cycles, transforming it available for plants. Isolation of 18 Azospirillum and 18 Azotobacter bacterial isolates was effectuated from the rizosphere and interior roots of the following plants: Carex fusca All., Carex rostrata Stokes., Eriogonum latifolium Sm., Carex elata All., and from Equisetu...
Autori: Csaba Dezso Andras, Eva Gyorgy, Eva Laslo, Gyongyver Mara, Rozalia Veronika Salamon, Sarolta Szentes, Szabolcs Lanyi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25894

Abstract Effects of the aeration rate on nutrient removal from synthetic domestic wastewater using an intermittently aerated sequencing batch reactor (IASBR) were studied at ambient temperature. Two aeration rates, 0.8 and 1 L air/min, were studied. At the aeration-rate of 0.8 L air/min, removals of COD, NH4+-N, total nitrogen (TN) and PO43--P were 84%, 96%, 75% and 99%, respectively. At the aeration rate of 1 L air/min, removals of COD, NH4+-N, TN and PO43--P were 90%, 99%, 70% and 66%, re...
Autori: Liam G. Henry, Liwen Xiao, Xinmin Zhan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25941

AbstractChina has experienced enormously rapid development since the open door policy introduced in 1979. Population has increasedby 30% to 1.3 billion, and the annual GDP growth rate was 9.8 % in the last few years. However, frequent water disasters inrecent years have caused significant damages to China’s regional growth and societies. There are huge contemporary challengesfor Chinese water resource management. In this paper, we examine three major challenges for China’s water resourcemanageme...
Autori: Dabo Guan, Faith Ka Shun Chan, Joseph Holden, Yanan Jiang, Yaqian Zhao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25966

“The Exploratory Workshop „Progress inEnvironmental Engineering, Biotechnology andManagement in The Frame of Knowledge-BasedSustainable Economy” took place in the contextwhen worldwide research shows that the currentindustrial system supports a population that useresources and generates waste, consuming the Earth'ssupply, but who’s biocapacity is far outweighed bythe increased demand of products for a developmentsystem that often works on unsustainable bases.Today’s challenge is the integration ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25969

AbstractEfficient large-scale recycling of polymeric wastes for automotives is of increased interest from ecologic and economic point ofview and represents an important goal for the car recycling industry. One alternative is to develop novel composite materials,relying on waste car parts, for indoor or outdoor large-scale applications, without using small molecular plasticizer or otheradditives but insuring a good compatibility for large percentages of thermoset plastics in the composite. Previo...
Autori: Anca Duta, Cristina Cazan, Dana Perniu, Mihaela Cosnita
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25982

AbstractOn a daily basis one is confronted with litter. Most forms of litter are, however, of no concern to people. Nonetheless, litteraccounts for serious economic costs, and causes negative effects to health, safety and biodiversity. Most countries implementlitter reduction policy programs, often in the form of litter collection and penalties for littering. Litter reduction does notnecessarily have to be a government initiative as grassroots and business initiatives have shown; for instance, c...
Autori: , Laura Franco - Garcia, Theo de Bruijn, Thomas Hoppe
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25983

AbstractThe use of planar electromagnetic technology led to the improvement of high frequency characteristics of the structures and thedecrease of their size and profile, which made them easier to integrate in different devices. In order to improve these planarstructures, it is known that the parasitic capacitance (EPC) must be decreased. Another method to achieve a better functionality isto increase or decrease the high frequency losses, according to their use. Because the previous studies were...
Autori: Adina Racasan, Calin Munteanu, Claudia Hebedean, Claudia Pacurar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25996

AbstractThe increased concentrations of priority pollutants in wastewaters have imposed the completion of conventional treatment withadvanced treatment stages (such as catalytic oxidation, membrane processes, adsorption, ion exchange, etc.) for their removal bychemical degradation and/or physical separation.In this study, 4-chlorophenol (4-CP) is proposed as model-pollutant for the priority organic pollutants present in syntheticwastewaters and several processes which can act as advanced treatme...
Autori: Carmen Teodosiu, Corina Petronela Musteret, Daniela Arsene, Daniela Cailean, George Bârjoveanu, Petru Apopei, Roxana Elena Apreutesei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26022

AbstractWater quality is an inportant concern for the ecosystem state from a particular region. Since the continuous urban and economicdevelopment induces a negative impact on entire hydrological cycle, this study investigates the water quality of a Romanian lake,located in the Surduc area - Timis County. This perimeter has undergone significant economic development in the past twodecades due to increased tourism potential and the number of holiday residences.We proposed hybrid materias for the ...
Autori: Adina-Elena Segneanu, Cornelia Bandas, Florentina Cziple, Ioan Grozescu, Paula Sfîrloagă, Titus Slavici
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26040

AbstractThe removal of residual oil from palm oil mill effluent (POME) using boiler fly ash was studied in this paper, with focus on theadsorption isotherms and kinetic studies by measuring the residual oil concentration using UV-spectrophotometer. The percentresidual oil adsorbed decreased from 80% to 5% as contact time was increased from 10 mins to 120 mins but increased from2.74% to 72.98% as initial concentration of residual oil increased from 0.04812 mg/L to 0.2406 mg/L. Pseudo-second order...
Autori: Jude C. Igwe, Stella N. Anioke, Uche Arukwe
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26078

AbstractThe present study reports the efficiency of almond shell as a cheap and available material for the removal of Cu (II) fromcontaminated aqueous solutions. The equilibrium experiments indicated that Cu (II) sorption obeyed the Langmuir isotherm at26, 40 and 55oC. The highest value of the maximum uptake (Qo) from the Langmuir equation was found 6.783 mg g-1 at 40oC.The various thermodynamic parameters such as ΔGo, ΔHo and ΔSo were also calculated. The values of ΔGo varie...
Autori: Soheil Aber
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26080

The book edited by Haibo Xie and NicholasGathergood focuses on one of the most importantscientific issues of the 21 century which is thereplacing fossil fuel with sustainable alternatives suchas biomass. Fossil fuels are conventional rawmaterials for many industrial sectors includingchemical and energy production. Usage of fossil fuelis limited by their availability, price and carbonfootprint. Biomass is a renewable resource globallyavailable, cheaper and carbon sequestering. Step bystep shiftin...
Autori: Adrian Catalin Puitel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26101

The ELSEDIMA International Conference on “Environmental Legislation, Safety Engineering and Disaster Management” held its 9th edition in 2012. This edition was organized by the “Babeş-Bolyai” University of Cluj-Napoca - Faculty of Environmental Science and Engineering, together with the Ministry of Administration and Interior - General Inspectorate for Emergency Situations, the Disaster Preparedness and Prevention Initiative for South – Eastern Europe and S.C. I...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26102

Abstract Recently, a new failure probability index was introduced that characterizes the operation of highly sensitive chemical reactors (i.e. when highly exothermic / hazardous reactions are conducted). Based on this, the current paper exemplifies the application of the risk analysis methodology proposed to generate the Pareto optimal operating solutions accounting for reactor productivity maximization (product yield) and probabilistic risk minimization. The multi-objective optimi...
Autori: Anca Dan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26108

Abstract Poly(hydroxybutyrate) (PHB) is a biodegradable thermoplastic polyester with very high potential for industrial applications. The properties could be improved by mixing with another polymer, natural or synthetic, such as poly(vinyl alcohol) (PVA). The resulting polymer blends are potentially able to achieve the desired performance for different applications. Biodegradation modifies mechanical, physical and chemical properties of a given material. PHB are degraded by diverse...
Autori: Luiza Jecu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26111

Abstract The paper deals with reinforced soil structures used in critical infrastructures for ecological landfills. During the last 17 years in Romania 28 such landfills were completed. Romania is however a country where strong earthquakes often occur. About 60% of its territory feels the seismic actions which combine with the existing ones. During earthquakes in the massive structures of landfills, huge inertial forces are developing. Due to uncontrolled movements and deformations...
Autori: Cristina Feodorov
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26118

Abstract Using lab experiments, the heavy metal tolerance of young ectomycorrhizal trees was assessed in two axenic systems, co-cultures on germination medium and a sandwich technique system with Modified Melin-Nokrans medium. Sterilized seeds of the tree species Scots pine (Pinus sylvestris) and Norway spruce (Picea abies) were inoculated with the ectomycorrhizal fungi Paxillus involutus and/or Tricholoma vaccinum in media containing either 10 mM CsCl or 0.25 mM CdCl2. The behavio...
Autori: Maria Lucia Bizo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26119

Abstract Over the last years an increasing number of retailers have undertaken green marketing-specific actions with the purpose of not only bolstering their reputation but also of improving their awareness, increasing their trust or enhancing the target groups’ appeal for the company. These actions/measures will eventually exert a positive effect on how customers perceive retailers. Once a proper, positive and proactive image has been developed in consumers’ mind, the chance of ga...
Autori: Dan-Cristian Dabija
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26129

Abstract Our researches have focused primarily on variations of different biophysical and biochemical effects on vegetal and animal material at macro, micro, and ultra-micro scale resulted from changes in environmental condition. Growth and spectral parameters of rapeseed seedlings from seeds exposed to UVA-VIS radiation with a high pressure lamp which emits incoherent continuously radiation for different time periods were examined 14 days after germination. These studied parameter...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26138

Abstract Volcanic hazard is ignored in natural hazard studies in Romania because no active volcano is known on its territory. However, the 2010 eruption of Eyjafjallajökull volcano in Iceland and its consequences on air traffic safety across Europe and the whole northern hemisphere dramatically demonstrated that volcanic hazard in a certain area, such as a country, is not necessarily related to the presence of active volcanoes in the same territory. Therefore, target-focused approa...
Autori: Alexandru Szakács
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26146

AbstractKnown concentrations of naphthalene were added to soil samples to investigate the anaerobic degradation potential by theinoculated naphthalene-adapted bacteria under nitrate reducing conditions. Naphthalene could be anaerobically biodegraded tonon-detectable levels within 35 days when the initial concentrations were 5.8 mg/kg, 34.7 mg/kg, 61.4 mg/kg, 93.7 mg/kg and146.6 mg/kg in soil, respectively. The degradation rates of naphthalene increased with increasing initial concentrations. The...
Autori: Junfeng Dou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26157

AbstractRock dynamic mechanical characteristic is the basic information to study the damage of rock structures under dynamic loadsinduced from earthquake or blasting. A nuclear power plant site is a granite mountain of the same active tectonic period. Dynamic triaxial compression experiments need to be conducted on the drill cores of different project parts according to the design requirements. These drill cores were formed in the same active tectonic period, but as a result of the different bur...
Autori: Liu Bo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26163

AbstractA novel parallel A2O-MBR system was developed in this study based on the theory of denitrification with phosphorus removal.By utilizing the denitrifying phosphorus accumulating bacteria (DPB), the carbon source in the influent could meet the needs ofboth the denitrification and dephosphorization processes. Therefore, the carbon source restriction in conventional A2O processeswas resolved. The proposed system was inoculated with the sludge collected from the secondary settling tank in a m...
Autori: Liang Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26170

AbstractA wet flue gas desulfurization (WFGD) system adopting electrostatically-assited twin-fluid atomization injector was presented.Spatial distributions of the droplet sizes, velocity for different voltages were measured using limewater and SO2 removalefficiency for different voltages and Ca/S ratios were tested using limewater drops. The physical and chemical improvementmechanisms were analyzed using spray characteristics and double film theory. The analysis showed that electrostatically-ass...
Autori: Zhentao Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26175

AbstractThermal behaviour, microstructure and mechanical properties of the clay polluted by acidic and alkaline pollutants wereinvestigated by thermogravimetric/differential thermal analysis (TG-DTA), scanning electronic microscope (SEM), mercuryintrusion experiments, permeability coefficient and unconfined compressive strength tests. The clay polluted by alkaline solutionpresented distinct exothermic peaks at 304-310oC, while it’s not observed for the one polluted by acidic solution due to thed...
Autori: Zhao Ying
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26182

AbstractAccommodation profoundly affects energy use and carbon dioxide emissions in the tourism sector. This paper focuses on starratedhotels in China, and applies a bottom-up approach to estimate the amount of carbon dioxide emissions from tourismaccommodation in 1998–2009. The results show that carbon dioxide emission of star-rated hotels increased from 4.37 million tonin 1998 to 16.82 million ton in 2009 (an increase of 3.84 times). Although the amount of carbon emissions is increasing, the r...
Autori: Zi Tang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26185

AbstractThis study estimates the number of visitors to State Protected Wilderness Areas (SPWAs) in Chile by origin (national andforeign), using annual data from 1986 to 2011. Two linear regression models were used: one to estimate the number of Chileanvisitors and the other for foreign visitors. The model to predict Chilean visitors in 2013-2014 incorporates the GDP per capita inChile, the annual trend in the conditions of international economic crises, while the model to predict the number of f...
Autori: Jaime Pérez-Kallens
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26189

AbstractIn spite of the ambition of the Millennium Development Goals (MDGs), water supply and sanitation are still worryingly deficientin South-East Asia (SEA). Due to the rapid increase in population, increased urbanization and industrial activities, and absence ofa strong regulatory framework, water quality in this region is impaired due to the high levels of contamination. Because of thechallenge of providing safe drinking water from poor quality water sources, development of low-cost drinkin...
Autori: Pham Thi Thuy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26202

AbstractSimultaneous uptake of Cd(II) and Pb(II) by corn in two artificially contaminated soils (sandy and sandy loam) amended withtwo doses of natural (NM) and modified (MM) montmorillonite were investigated in a pot experiment under greenhouseconditions. Results showed that the addition of NM and MM to sandy loam soils didn’t have significant effect on the uptake ofCd(II) by roots, then is translocated to the aerial tissues. On the contrary, uptake of Cd(II) by shoots was increased in potscont...
Autori: Hadis Hosseini
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26205

AbstractExcess biomass produced in the degradation processes of organic pollutants is creating environmental challenges for wastewatertreatment plants. The A+OSA system, a modification of the anoxic / oxic (A/O) process via insertion of a sludge holding tankinto a sludge return line, has been demonstrated to be capable of achieving simultaneous nutrient removal and sludge reduction.Here we report the results of an investigation aimed at evaluating the impact of the sludge holding tank on the bio...
Autori: Li Jia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26207

AbstractThe dominant litter samples Pinus sylvestris L. needle litter and Acer platanoides L. leaf litter were collected in the coniferousmixed forest located at 54ş43‘ N 25ş19‘ E (Vilnius, Lithuania) in April 2010. Different heating temperatures (150, 250, 350, 450and 550şC) and 2 hour heating duration were used to produce ashes. The selected heating temperatures affected mass loss, colour, pH, electrical conductivity (EC), C/N ratio, nutrient concentrations of the ash. The darkness of Munsell ...
Autori: Jolita Dūdaitė
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26208

AbstractIn an urban environment, visibility strongly reflects human safety and welfare. Generally, visibility is dependent on particlescattering and absorption. The former is influenced by light wavelength, atmospheric gaseous species and particle characteristics,especially number and size distribution. Therefore, it is necessary to establish the relationship between visibility and particlecharacteristics. Furthermore, it is important to understand the formation mechanism of secondary aerosols. ...
Autori: Chih-Ming Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26221

AbstractWildlife-vehicle collisions are only a human safety problem, but road mortality can significantly impact some wildlifepopulations. Metal wire mesh fences are one of in most popular preventative means to reduce number of wildlife-vehicleaccidents in Lithuania. The fencing of this highway started in 2006 and continued in 2008 and 2009. The aim of this presentationis to give the investigation results on the impact of wildlife-vehicle accident prevention installations, e.g. underpasses and f...
Autori: Vytautas Oškinis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26230

AbstractIn this article, hydrodynamic parameters and overall Oxygen mass transfer coefficient of petroleum based micro-emulsions in anairlift reactor were investigated. Four different petroleum-in-water micro-emulsion systems containing kerosene, heavy naphtha,light naphtha and diesel as oil based were used with concentrations of 3% and 7 % (v/v). The experimental data were supportedby simulation results obtained from the Computational Fluid Dynamics (CFD) method. The CFD was properly able to si...
Autori: Mostafa Keshavarz Moraveji
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26234

AbstractWastewater sludges are organic and nutrient-rich materials that could be used to improve soil tilth. However, the land applicationof sludge needs to be properly managed to avoid the detrimental effects on micro and macroorganisms in the soil. Earthwormsare one of the most important soil macroorganisms. Addition of sludge to the soil environment may impact earthworm activity,and in turn, soil productivity and health. In this study, sludge from the canned food industry was added to soil mi...
Autori: Efsun Dindar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26238

AbstractThe paper analyses the opportunity of recycling sewage sludge in the manufacturing of ceramic building materials. Wastewatertreatment plants (WWTP) produce annually a great volume of sludge and its processing become more difficult. On the otherhand, there is an increased need to develop new alternatives beyond the already known methods. The use of WWTP sludge asraw material for the production of bricks may become an interesting alternative, both from an industrial and environmental point...
Autori: Anna-Maria Szőke
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26251

AbstractThe applications of biofilm treatment technologies for domestic wastewater are being increased in many parts of the world. Theaim of the study is to assess a compacted aerobic attached growth fix-film unit (termed Bio-cache) for treatment of small volumedomestic wastewater. The system consists of the miniature plastic packing matrix, which provides a large surface area of 300m2/m3, so as to maintain the high rate growth of viable organisms responsible for organic degradation. The study o...
Autori: Alireza Valipour
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26266

AbstractReliability model which can quantitatively calculate the probability of failure of storm sewer was developed in this study. Annualmaximum rainfall intensities of six South-Korean cities were used to determine the statistical distribution for reliability model.From the results of reliability analysis, it was found that statistical distribution for the annual maximum rainfall intensities of sixcities in Korea is well matched with Gumbel distribution. Rational equation was applied to determ...
Autori: Hyuk Jae Kwon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26270

AbstractA novel RHA/PFA/CFA sorbent was developed by sol-gel method using three types of ashes, i.e. rice husk ash (RHA), palm oilfuel ash (PFA) and coal fly ash. From surface analysis of selected RHA/PFA/CFA sorbents, the spent sorbent had more compactstructures covered by irregular rough surface and the specific structure of raw RHA, PFA, and CFA were no longer visible. Inaddition, lower specific surface area was obtained for spent RHA/PFA/CFA sorbent. Batch studies were performed to evaluatet...
Autori: Irvan Dahlan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26272

AbstractOil spills inflict serious pollution on the environment. Numerous environmental rules and regulations have been made to improve oil spill response and cleanup performance. However, current oil spill control technologies have failed to ensure environmental safety and ecosystem integrity. Cleanup efforts often lead to more environmental hazards in one way or the other causing public outcry for alternate energy sources. Since hydrocarbon driven energy demand is expected to rise in the fores...
Autori: Abdul Aziz Al-Majed, Abdulrauf Rasheed Adebayo, Mohammed Enamul Hossain
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26278

AbstractThe aim of the present study was to investigate the mechanism of Cr(VI) bioaccumulation by livingand active Phanerochaete chrysosporium. Fungal growth was inhibited beyond 10 mg L-1 Cr(VI) concentration thereby reducing the chromium bioaccumulation capacity. The optimum pH was found to be 6 for the growth and bioaccumulation of Cr(VI) by P. chrysosporium. Bioaccumulation efficiency decreased from 81.47% to 23.82% when Cr(VI) concentration was increased from 10 to 40 mg L-1. A Fourier tra...
Autori: Kaustubha Mohanty, Somasundaram Murugavelh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26280

AbstractThe significant increase in air transportation expected over the coming decades, combined with the initiation of the emissions trading system (EU-ETS) within European aviation, is increasing the requirement for airlines to find new levels of efficiency in their operating practices leading to reduced emission levels. Technological developments are expected to lead to substantial reductions in fuel burn and emissions over the long term, including aircraft design optimization and the use of...
Autori: Athanasios J. Kolios, Stuart Howe
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26282

AbstractThe efficiency of solar disinfection (SODIS) was evaluated and enhanced by concentrating sunlight at low pH values in a solar collector disinfection (SOCODIS) system at different sunlight intensities and is highlighted in the author’s earlier findings. In order for further improving the rainwater disinfection, simple technique like wrapping the PET bottles with heat-resistant plastic bags (Wp) were used for enhancing the thermal/synergistic effects of solar radiations. An analysis of the...
Autori: Abdulrahman Ali Alazba, Mooyoung Han, Muhammad Nasir Amin, Muhammad Tahir Amin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26298

AbstractThe aim of this study was to evaluate the results of an urban pilot project on separate collection of packaging wastes. The projecthas been performed in a developed and industrialized city of Turkey, Kocaeli with the aim of collecting packaging wastesgenerated in residents, public offices and other business offices. The project was carried out according to packaging wastemanagement plans developed by sub-municipalities in coordination with Kocaeli Metropolitan Municipality. Total monthly...
Autori: İsmail Özbay
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26325

AbstractA septic tank is an essential part of the decentralized wastewater management system. The aim of the experiment described inthis paper was to evaluate the impact of the method of sampling and hydraulic retention time (HRT) on the performance of acircular three chamber septic tank and to design a septic tank for a single household with four residents and wastewater flowrateof 0.6 m3/d. It was found out that the difference between suspended solids (SS) and chemical oxygen demand (COD) remo...
Autori: Ala Kirjanova, Mindaugas Rimeika, Regimantas Dauknys
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26329

AbstractMetal concentrations in plants, soil and sediment were evaluated in the vicinity of a former iron/nickel enriching factory atPogradec, near Ohrid Lake in Albania. Metal levels were significantly higher in soil samples than in the corresponding plants.Iron concentrations in both soil and plants were much higher than the nickel ones. Lower plants (lichens, mosses and fungi) had ahigher uptake and accumulation of nickel, followed by water plants and non-cultivated (wild) plants. Iron levels...
Autori: Dimitrios Bellos, Dimitrios Veros, John M. Halley, Lazaros Symeonidis, Sonila Llupo, Thomas Sawidis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26340

AbstractThe removal of phosphorus by strongly basic anion exchanger was investigated. Removal efficiency increased with contact time,resin mass and initial solute concentration, while temperature showed a reverse effect. Equilibrium data were best fitted ontoLangmuir isotherm model (R2>0.99). Maximum sorption capacity of the resin was 66.22 mg/g, namely significantly higher thevalues reported in the literature. The Freundlich parameter (n = 4.3) and the Langmuir separation factor (RL = 0.067-...
Autori: Abdeltif Amrane, Hamid Reza Ghaffari, Mansur Zarrabi, Mohammad Mahdi Soori, Mohammad Noori Sepehr, Saied Borji
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26343

AbstractMonitoring an unstable slope is quite important for environmental safety. Based on our previous studies, this paper presents athird-generation distributed optical fibre transducer. The operating mechanism of this novel transducer was analysed for itsresponse to a single concentrated and uniform load, and a theoretical study was conducted on the elongation of the bottomsurfacefibres of a bending resistance model at the phases of linear elasticity and total cross-section cut-off stage. A b...
Autori: Bang Liu, Dong-Yan Liu, Hu Luo, Jing-Cheng Liu, Qiao-Ying Yuan, Yun-Ju Luo, Zheng-Wei Zhu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26348

AbstractAmmonia pollution occurs frequently in urban water networks, which threatens the safety of water supply systems. Zeolite can beused for the removal of ammonium in the pretreatment of raw water for its peculiar adsorptive property to ammonium, but a largeamount of sludge from this measure could be a significant pollution source. In this work, the dewatering performance ofprecipitated sludge from the pretreatment of micro-polluted raw water was studied. Batch experiments of the simulatedco...
Autori: Bairong Zhu, Hao Chen, Huaizheng Li, Zhenliang Liao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26355

AbstractTo deal with the undesirable factors in Data Envelopment Analysis (DEA), a non-linear DEA model was previously developedfor a paper production system, where the desirable outputs are increased and the undesirable outputs are decreased for efficiencyimprovement. To convert the proposed non-linear model into a linear one, a linear approximation to the non-linear constraint isused and an approximate efficiency score is obtained. In this paper, we propose a new method to solve the non-linear...
Autori: Jie Wu, Zhixiang Zhou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26363

AbstractInvestigating and exploring new methods of coal-mining environment has become a new project to resolve the safety of mineproduction. The virtual reality technology provides new ways and ideas for the safety of mine production, and the intelligence ofthe virtual environment is enhanced as the multi-agent is applied. Based on multi-agent technology and the investigation of themodeling approach of the virtual environment of the complex coal mine, a three-layer architecture model and the for...
Autori: Chaoli Tang, Chunling Wang, Liguo Qu, Liuyi Ling
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26364

AbstractCatalytic wet oxidation (CWO) of phenol was studied in the present work. The effect of liquid hourly space velocity (LHSV),superficial gas velocity, reactor pressure, temperature and initial phenol concentration on phenols removal was investigated.Results showed that phenol conversion increased with increasing reaction temperature, reactor pressure, and superficial gasvelocity of oxygen, yet it decreased with increasing (LHSV). The results exhibited that the highest phenol conversion of(...
Autori: Farah T. Jasim, Luma S. Ahmed, Mohammad F. Abid
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26381

EDITORIAL...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26388

AbstractMaintenance activities are among activities at work that can affect the safety and health of workers, both operators and thoseinvolved in maintenance operations of work equipment in use. Lack of maintenance can lead to a temporary or total stop of theproduction process, which means loss of production, as well as a high risk for the workers involved. Employers who do notmaintain or use, at a high safety level, the work equipment may produce major accidents at work.Taking into account the ...
Autori: Anca Elena Antonov
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26394

AbstractThirty two per cent of all injury risks identified at work are risks arising from work equipment. In this sense, the use of protectiveequipment, respectively earthing devices during interventions / works in electrical installations are the main protective measureagainst these risks. Short-circuit current calculation is necessary to determine the stress on both switching devices and protectionequipment in substations, and for choosing protective equipment for workers. This paper aims to m...
Autori: Constantin Beiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26393

AbstractWork accidents prevention is one of the strongest paradigms of safety management. When developing its own mental accidentcausation model, the occupational health and safety professional should acknowledge the benefits and drawbacks of the variousavailable models, to be able to critically assess the most fitted risk assessment tools for practical applications. Nevertheless, heshould be skilled enough to make the difference between "what is happening?" and what "should happen?" in the work...
Autori: Roland Iosif Moraru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26396

AbstractEmployers notified about working places under special conditions are required to develop Preventive and Protective RevisedPlan, in order to ensure the improvement of workers safety and health protection, including specific measures and actions, so thatthose working places comply with the norms and operate under normal conditions by the late 31 December 2013.This paper considers some outcomes of the Nucleu Program PN 07450226 funded by Romanian National Authority for Research(ANCS) and de...
Autori: Marius Kovacs
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26404

AbstractStatic electricity represents one of the potential ignition sources for the explosive atmospheres. The test methods for materials, ingeneral, and especially the test methods for textile fabrics for assessment of the protective performances in static electricity, haveknown a permanent evolution alongside newly developed electrostatically dissipative materials. Within the National Institute ofResearch and Development for Safety in Mines and Explosion Protection (INCD-INSEMEX) new testing s...
Autori: Mihaela Părăian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26405

AbstractIn industrial plants many types of combustible dusts are generated, processed, handled and stored. When ignited, they can burnrapidly and with a considerable explosion force, when mixed with air in proper proportions. This is the reason why adequateprecautions have to be adopted, to ensure all equipment is appropriately protected so that the ignition likelihood of the explosiveatmosphere is diminished.Explosion preventing and protection precautions aim to stop explosion occurrence, by el...
Autori: Adrian Jurca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26406

AbstractThis paper describes the model for forecasting the exposure risk of workers to global occupational vibrations. The research hasbeen achieved within the PN 07 45 01 18 Project in the framework of the NUCLEU/2012-2013 Program. This project has anational and European interest, entailing the increase of occupational health and safety level and ensuring sustainableenvironmental quality and comfort at workplaces.The scientific novelty is given by the complex and interdisciplinary aspect of the...
Autori: Gabriel Dragoş Vasilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26409

AbstractAs the threat posed by global climate change becomes more acute, action must be taken to mitigate carbon emission. Carbonfootprint, as a widely used term and concept, is increasingly being recognized as a valuable indicator in the field of GHG andcarbon emissions management. However, few attempts have been made to investigate precise relationship between carbonfootprint and influential factors. In this paper, STIRPAT model was employed to reveal the dynamic relationships betweencarbon fo...
Autori: Xiangmei Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26414

AbstractThe objective of this work was to analyse safety and health at work regarding the exposure of workers to styrene, and to establishthe basis for an exposure control system over the entire Republic of Slovenia. The main goals were to determine the number ofexposed workers, the levels of exposure at workplaces, and the effects to workers health. The measurements of the airbornestyrene concentrations and the biological monitoring of the exposed workers were performed. One thousand four hundr...
Autori: Lidija Korat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26415

AbstractUsing the blasting machines in explosive atmosphere involves the fulfillment of certain basic safety requirementst in Europe.Testing blasting machines to assess compliance with specific requirements is particularly important given the existing risk ofexplosion that has to be minimized so as to ensure safety of life, health and environment and to prevent damage to property andthe environment. This paper addresses the analysis of the essential health and safety requirements for blasting ma...
Autori: Leonard Lupu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26416

AbstractThis paper describes the application of a specific model and software designated as EVASAN to identify, assess and prevent theoccupational health and safety risks in the Romanian health care sector, developed in the POSDRU/81/3.2/S/48872 projectCOMPEFSAN by the "Alexandru Darabont" National Research and Development Institute on Occupational Safety Bucharest,in partnership with the "Carol Davila" University of Medicine and Pharmacy Bucharest, the Romanian Institute on Economical -Social R...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26419

AbstractA lab-scale packed-bed biofilm channel reactor that operates as a plug-flow system equipped with top aeration modules wasconstructed and evaluated. To assess the reactor performance a microbial community able to degrade linuron was used. Changingthe fluid flow rates and the linuron concentrations in the inflowing medium the volumetric loading rates of linuron (BV,L) weregradually increased from 0.29 to 14.93 mg/Lh. During the operation of the reactor, an airflow rate of 0.15 ą 0.05 L/min...
Autori: Erick Marrón-Montiel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26465

AbstractIn the last decades, the surface of Romanian forests decreased due to an intensive harvesting and, as a consequence, the price ofpulpwood significantly increased. In the same time, the regulations for environmental protection were successively hardened inRomania, so that all chemical pulp mills were closed for economic and environmental reasons. In these circumstances, Romanianpaper producers shifted to recovered paper as raw material. This decision is in accordance with trends of Europe...
Autori: Adrian Cătălin Puiţel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26462

AbstractPathogenic bacteria are fetal to human health, requiring cost-effective and safe approaches to be removed from drinking watersource. With poly-allylamine-hydrochloride (PAAH) stabilization, magnetic nanoparticles (MNPs) were introduced in this studyto remove pathogenic bacteria by electrostatic interaction and magnet capture. High removal efficiency was achieved for fourmain pathogenic species, as Escherichia, Acinetobacter, Pseudomonas and Bacillus, and over 99.5% of the pathogens can b...
Autori: Yunfeng Xu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26475

AbstractMunicipal solid waste management is a matter experienced by the entire world, mostly encountered in urban areas as a result ofpopulation growth and increased income per capita. This issue always posed threats to environmental quality and human health,and continues to be one of the major environmental problems people continues to face. In the last few decades, the systemsanalysis techniques have been applied to manage the municipal solid waste (MSW) streams through a range of integrativem...
Autori: Cristina Ghinea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26481

AbstractFault-Trees (FT) and Event-Trees (ET) are well recognized techniques worldwide, which have been used by reliability experts infailure analysis of complex technical systems. In risk assessment (RA) of Occupational Health-Safety Systems (OHSS), thesituation is absolutely different, since their application is not quite expanded and has not been extensively incorporated in themain risk assessment methodologies of OHSSs, despite their significance. In this article, we review and classify FT/E...
Autori: Panagiotis Marhavilas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26483

AbstractA pot experiment was conducted to evaluate the growth and metal accumulation in water spinach (Ipomoea aquatica) establishedon a 30-year old active firing range soil amended with chicken manure (CM) and coconut tree sawdust (CTS) at application ratesof 0%, 1% and 3% (w/w). Both amendments increased biomass yield and reduced plant metal uptake. The bioconcentrationfactor (BCF) and transportation factor (TF) values of the metals were in the order of Zn > Cu > Pb. The ammonium acetate...
Autori: Azlan Kamari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26499

AbstractThe mining waste facilities in the Baia Mare region, Romania, resulted from the extraction of poly-metallic ores (including Au,Ag). Metal sulphide minerals from the mining waste facilities have a potential to produce acid rock drainage (ARD) and togenerate risk for the environment, including for the water resources. Some of the mining waste deposits from the region arelocated near the town of Baia Mare, close to the residential areas, the agricultural lands and the surface water. The sho...
Autori: Oana-Cristina Modoi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26512

AbstractFault-Trees (FT) and Event-Trees (ET) are useful analytic tools for the assessment of reliability and safety of complex technicalsystems, and occupational health-safety systems (OHSS), as well. In this work we broaden and expand our previous studyregarding the features of FT/ET methods. To clarify this further, in the present article we statistically analyzed the results of aliterature survey, concentrated on FT/ET techniques applied in risk assessment (RA) of OHSSs, in order to (i) depi...
Autori: Panagiotis Marhavilas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26518

AbstractPetroleum tanker trucks are integral vehicles for delivering fuel and other petrochemical products from place to place and must becleaned regularly. Pressure washing with hot or cold water serving to remove oil and filth from the tanker truck container,produces oily waste water with an oil concentration of about 300-500 mg L-1 which, according to environmental standards andregulations worldwide, must be disposed of and treated properly. In the present paper an integrated electrochemical ...
Autori: Konstantinos Dermentzis
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26520

AbstractThe primary objectives of this study were to identify the ecotypes of the ‘longicaulis’ giant reed (Arundo donax L.) that arewinter-frost and cold tolerant in temperate climates on marginal lands and to perform biotechnological research on theseecotypes. We searched for large ‘longicaulis’ giant reed ecotypes, which wintered successfully in spite of the 2012/2013 winterfrosts and sprouted from stem nodes in the spring of 2013 in three locations of the Balaton basin. Starting in vitro cul...
Autori: Gabriella Antal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26527

AbstractAn important target of the European Union and national governments is to increase the contribution of renewable energy to thetotal energy supply. According to numerous estimates, the proportion of renewable energy sources of the global energyconsumption could reach 15 to 20 percent by the middle of the 21th century; moreover the total amount of investments inrenewable energy sources could be 2.5 times greater than the current level. This increased investment is definitely achievable duet...
Autori: György Csomós
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26536

AbstractSocial and economic development can cause land cover changes that significantly affect ecosystem services and functions. Thisstudy investigated the temporal variation in ecosystem service values in response to land cover changes caused mainly by humanactivities in Harbin City, one of the fastest growing metropolitan areas in northeast China. The aim was to provide guidance forregional sustainable development. An evaluation method for ecosystem service values based on land cover change wa...
Autori: Zi Tang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26556

AbstractEnvironmental and territorial compatibility of industrial activities can be evaluated by considering several criteria, usuallyformalized in the contest of a Strategic Environmental Assessment (SEA); the pipelines sector, however, is not as wellstandardized as others. In this paper, a new methodology to evaluate territorial compatibility of proposed pipelines is presented.This approach can be useful to assess proper development compatibility of oil and gas pipeline networks, and it could ...
Autori: Vincenzo Torretta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26561

AbstractHeavy metals in sludge have been one of the limiting factors for sludge reclamation, and therefore the changes of heavy metalsduring sludge treatment process should be concerned. This study investigated the detailed profile of changes of seven typicalheavy metals (As, Cd, Cr, Cu, Ni, Pb, and Hg) in the activated sludge during ultrasonic treatment process. The influences ofsonication time and ultrasonic power density were studied. Results showed that heavy metals in sludge were released i...
Autori: Tian Wan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26563

AbstractThis study aims to understand the acid-leaching behavior of metals from 2 to 4 mm waste printed circuit boards (WPCBs)containing 22.0% ą 1.1 Cu, 6.7% ą 0.2 Ca, 0.68% ą 0.02 Sn, 0.59 ą 0.01 % Pb, 2.71% ą 0.08 Al, 0.22% ą 0.01 Fe, etc..Copper leaching was increased for sulfuric acid concentrations up to 1.2 mol/L and hydrogen peroxide concentrations of 10.0vol% for a pulp density of 100 g/L at 50°C over 4 h, whereas for the same concentrations of sulfuric acid and hydrogen peroxidecopper l...
Autori: Manoj Kumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26566

AbstractPresent study was envisaged to study chelators-metal interaction in phytoaccumulation of metals as a bioremediation technologyto decontaminate metal pollution and adsorption of metals on soil. Lactuca sativa was used as model plant for phytoaccumulationto identify uptake of Cadmium (Cd) and Lead (Pb) and their subsequent accumulation in edible tissue of plant. Cadmium andlead were two selected metals for phytoaccumulation and copper was also studied for adsorption experiment. Green house...
Autori: Audil Rashid
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26568

AbstractWe reported the results of an isotopic study aimed at evaluating the medium to long-term effects of different water qualities anddeficit irrigation strategies on the ecophysiology of grapefruit in a 7-year-old plantation in SE Spain. For a better understandingof the interaction between nitrogen and salts from reclaimed water, RW, an experiment using natural abundance (δ) of 15N wasconducted. This study showed that in grapefruit crop irrigated with RW leaf δ15N value increased. ...
Autori: Cristina Romero-Trigueros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26573

Abstract Carbon capture and storage is one of the critical technologies that can enable the reduction of carbon dioxide (CO2) emissions of large industrial sites worldwide. The injection of CO2 into saline water formations is related with many factors and processes that control the safety of its long-term storage. This paper analyzes the leakage risks and the factors that influence the integrity of the cap rock in deep saline aquifer formation. Several pathways have leakage potential risks d...
Autori: Xiaojuan Qiao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26585

Abstract The effects of cadmium (Cd), Zinc (Zn), and Cd–Zn on growth and their accumulation in the Matthiola flavida shoots were investigated. A factorial experiment with two factors (Cd and Zn) concerning four concentrations of Cd (0, 5, 10 and 20 mg L-1) and four Zn concentrations (0, 10, 20 and 40 mg L-1) were carried out. The shoot and root biomass of M. flavida growing in Cd- Zn medium decreased significantly (p<0.01) compared to the control. Growing in the presence of 20 mg L-...
Autori: Naser Jamali
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26587

Abstract Heavy metals, such as Cr (chromium), have received attention during recent years due to their disposal in soil and water. Brave peanut (Pterogyne nitens Tul.), a tropical tree, was cultivated in 500 mol L-1 Cr+6 to observe how this species responds to this stress, with a view to its possible application in the restoration of degraded areas. In the present study, we report the use of a new method, photoacoustic spectroscopy, to evaluate the emission of CO2 and ethylene and th...
Autori: Luisa Brito Paiva
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26602

Abstract This study is focused on the dissolution kinetics of zinc oxide in ammonium acetate solutions to recover the zinc from alkaline and zinc-carbon spent battery powders. This study represents a first step for further studies in which actual waste powder is to be used. Therefore, the experiments were performed by using pure zinc oxide powder to evaluate the dissolution behavior of zinc. The effects of ammonium acetate concentration, reaction temperature, stirring speed and solid to liqu...
Autori: Nizamettin Demirkıran
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26618

Abstract This study examined the characteristics of geopolymer with solar panel waste glass. After 28 days of curing, the compressive strengths of the geopolymer samples containing 10 mass % and 20 mass % solar panel waste glass were 63.3± 1.8 and 49.1 ± 2.2 MPa, respectively. The geopolymer sample with 10% solar panel waste glass exhibited a stronger reaction than that with 20% solar panel waste glass, and the strength decreased as the amount of solar panel waste glass increas...
Autori: HuiCong Hao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26621

Abstract The feasibility of catholyte-conditioning to enhance the electrokinetic (EK) remediation of cobalt and lead polluted soil has been investigated in this study. Electrokinetic experiments were conducted using an EK cell 10 cm in width, 10 cm in height, and 50 cm in length. Plate type electrode of graphite was used as electrode material. Two experiments were conducted under constant voltage condition (2 V/cm). The pH values of the soil significantly affect the removal of Co and Pb ions...
Autori: Mahdi Bahemmat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26623

In the Huai River Basin, pollutant masses are frequently concentrated into dams and sluices, which are subsequently discharged anddestroying the downstream ecology and environment. This phenomenon has been termed the specified paroxysmal water pollution incident (SPWPI), which has attracted worldwide attention as a large-scale water pollution problem. Studies of the formation mechanism of SPWPIs have become an urgent topic for fundamental research in water pollution prevention and control. I...
Autori: Şukru Dursun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26628

Abstract The degradation of polycyclic aromatic hydrocarbons (PAHs) including fluorene, phenanthrene, anthracene, fluoranthene and pyrene were investigated under thermophilic and mesophilic anaerobic-methanogenic conditions. By using central composite design, the impact of PAH concentration and soil to inocula ratio were systematically studied for their influence on PAH removal and biogas production. During the first 30 days, PAH concentration decreased in all samples indicating that the ino...
Autori: Tahseen Sayara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26629

Abstract The interest in waterborne paints amelioration increased lately due to the toxicological effect of certain ingredients on human health, the restrictive environmental legislation and the depletion and escalation in price of raw materials. Research efforts in formulating waterborne paints are directed to insure low volatile organic compounds (VOCs) emission while maintaining and even improving their properties. This paper presents a waterborne paint formulation process. The required ...
Autori: Andrei Ionut Simion
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26639

Abstract The purpose of this study was to investigate the influence of hydroxypropyl-β-cyclodextrin on diosmin, substance from the flavones category with important pharmacological properties. We carried out solubility studies, calculating the solubility constant of the complex formed between diosmin and hydroxypropyl-cyclodextrin at various temperatures (20, 25 and 37 0C) and in the presence of increasing cyclodextrin concentrations. AL type curves were obtained which suggest the format...
Autori: Constantin Ciobanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26643

Abstract Reactive Blue 19 (RB 19) dye removal from aqueous solutions by using layered double hydroxides containing nitrate as the intergallery anion (MgAlLDH) as adsorbents was investigated. The adsorption process was found to be influenced by the contact time, the initial dye concentration, the presence of inorganic anions and the temperature. The XRD and FTIR analysis evidence two competitive processes: adsorption and/or intercalation of the molecules may take place, depending on the initi...
Autori: Maria Celina Alexandrica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26651

Abstract This study focused on the use of jet aeration to treat printing and dyeing wastewater. The related environmental factors influencing the dynamical efficiency of a jet aerator were investigated. Results showed that an ideal linear relation existed between dynamical efficiency and working pressure (R2 > 0.98), with dynamical efficiency decreasing gradually as the working pressure increased. When the gas–liquid ratio was approximately 0.6:1 to 1.4:1, more bubbles were formed b...
Autori: Chunsheng Le
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26664

Abstract Magnetic contamination is considered more and more as a challenging issue related to biosphere pollution with magnetic materials originating in natural and artificial sources (volcanic eruptions and respectively industrial activities that contributed to iron and other metal compounds spreading in air, water and soil). Aiming to study the impact of magnetic metal ions such as iron and cobalt on the metabolism of some environmental microorganisms, in this paper an experimental simulat...
Autori: Lacramioara Oprica
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26675

Abstract The use of hydrogen in spark ignition engines as a supplementary fuel can enhance combustion and reduce toxic emissions. Difficulties in hydrogen storage and production limit its use in internal combustion engines. This paper investigates the performance of a spark ignition engine with the addition of a mixture of hydrogen (H2) and oxygen (O2) into the intake manifold. Hydrogen is produced by an alkaline electrolyser and consumed simultaneously to eliminate the need for a storage de...
Autori: Yasin Karagöz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26685

Abstract The degradation and adsorption behavior of dibutyl phthalate (DBP) in methanogenic phase refuse was investigated through laboratory microcosm experiments. The results showed that the half-life of DBP in the sterilized refuse was 5.9 times higher than in unsterilized samples, but that it decreased by 35.8% when dominant bacterial strains were added. Different concentrations of DBP did not have obvious effects on its degradation. The half-lives of DBP were decreased by 53.0%, 37.2% an...
Autori: Chengran Fang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26690

Abstract The effect of goethite addition, hydrogen peroxide concentration, initial pH, hydroxyl radical scavenger and initial dye concentration on the decolorization of Orange II by Fenton-like process was investigated. The results showed that the decolorization rate increased with goethite addition and hydrogen peroxide concentration, but decreased with the increase of initial dye concentration. There existed an optimal initial pH to achieve the highest decolorization rate. The presence of ...
Autori: Hui Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26693

Abstract In this study, the efficiency of Fenton’s process to remove nickel (II) from industrial plating effluent was investigated. The effect of pH, contact time, concentrations of Fe2+ and H2O2 were surveyed. Kinetic experiments were performed in order to predict the nickel (II) removal rate from wastewater. At pH 1 to 4, nickel (II) removal efficiency increased and declined at pH > 4. The maximum nickel (II) removal efficiency was 98% at 60 min contact time, pH: 4, and Fe2+ and H...
Autori: Mohammad Malakootian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26704

Abstract Maximum removal (94±1.2%) of 2, 4 dichlorophenol (50 mg.dm-3) was achieved on silica with agitation of 4 hours, at pH 8 and 42°C. The positive enthalpy (ΔH) and negative free energy values (ΔG315K) suggested the endothermic and a spontaneous nature of sorption. The free energy of the process at all temperature was negative and increased with the increase in temperature. The values of free energy suggested a spontaneous process where the spontaneity decreased w...
Autori: Abdul Ghaffar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26718

Abstract The Organizations of the 21st century had evidenced that Management Systems and Standards have become a key aspect for their sustainable development and a prerequisite for their existence. In this recent decade, the Systems for Quality (ISO 9001:2008), Environment (ISO 14001:2004), Occupational Health and Safety (OHSAS 18001:2007), Corporate Social Responsibility (SA 8000:2008 and ISO 26000:2010) and Risk Management (ISO 31000:2009) form the core pillars of the Organization, supple...
Autori: Gopalakrishnan Muthu Samy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26720

Abstract Along with nowadays growth of urban areas and population, it is more and more important to have better water resources management, especially regarding drinking water supply. Maintaining a good state of a water distribution network poses challenges that are addressed by research community. Two of the main challenges in management of water distribution systems are the reduction of energy consumption due to the high pumping requirements in some systems and/or reduction of water losses...
Autori: Mario Castro Gama
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26747

Abstract Extensive use of plastics leads to the increase of non biodegradable wastes that have to be recycled due to both dramatically decrease of natural resources to producing them and to their increasing need as well as due to environmental issues. Most of goods made by materials based on wastes have to be commonly used by people. Antibacterial character of those is necessary to avoid epidemics. This paper deals with determination of antimicrobial character of materials based on polymeric...
Autori: Florica Silvia Cristina Patachia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26751

Abstract Natural herbicides may be more sustainable than their chemical homologues, but they are still toxic substances that can affect humans and animals. Implementation of natural herbicides may require just as many safety precautions as the application of commercial herbicides, hence the need not to confuse the term "organic" with "non toxic". Allelopathy is accomplished through chemical inhibition of species towards each other, being an antagonistic phenomenon. Respon...
Autori: Ana Maria Vîrteiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26752

Abstract The present work systematically investigates the photocatalytic degradation of carbamazepine (CBZ), an organic compound, known as refractory to the conventional wastewater treatment by the titanium dioxide PC 500 catalyst. The effects of some fundamental operating parameters in heterogeneous photocatalysis were investigated in this work in order to determine the main ones affecting the degradation kinetics. The obtained results clearly showed that the removal rate of the target comp...
Autori: Lidia Favier
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26754

Abstract The aim of this study is to analyse Romanian situation regarding packaging waste generated and to find out how the targets imposed after integration were accomplished, based on data collected and published by Eurostat, as well by other publications. The municipal solid waste collection practice in Romania is based on mixed collection (approximately 96% of waste generated), without or with minor sorting at source. Waste recovery is applied to small percentages and only for certain ca...
Autori: Carmen Luiza Costuleanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26764

Abstract Thermophilic anaerobic digestion is a suitable technology to treat agricultural waste because of its higher biogas production, hygienisation effect and solids removal efficiency. Although these benefits, poor effluent quality and instability are encountered in some cases. The anaerobic co-digestion of winery waste and waste activated sludge at 55°C, operating at 23 days HRT and with an organic loading rate of 3.2 kg COD/m3d, was characterized by accumulation of volatile fatty ac...
Autori: Cinzia Da Ros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26775

Abstract New and end of life tires have been pyrolyzed in an innovative pilot plant that processes whole tires, thus saving the energy costs of shredding while allowing energy and materials recovery. Furthermore, the presence of a hydraulic guard guarantees high process safety. Several tests at different temperatures have been performed and the collected solid, liquid and gaseous products have been quantified and characterized. The influence of the maximum process temperature on yields and c...
Autori: Loris Giorgini
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26783

Abstract This study was aimed to stimulate laccase production by Trametes pubescens MUT 2400 by using a tomato-based medium. Two sequential 2x2 factorial designs were used to determine the effect of carbon (C) and nitrogen (N) source concentration on laccase activity and biomass concentration; copper was used as the sole inducer (0.75 mM). Analysis of the first factorial design showed that N had a strong positive effect on the maximum laccase activity, which occurred at day 12 of cultivation...
Autori: Federica Spina
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26795

Abstract Jiaozhou Bay, a shallow semi-closed bay surrounded by Qingdao City, has become one of the most important industrial zones in Shandong Peninsula, China. The sound development of Jiaozhou Bay is crucial to the Qingdao regional economy and ecosystem, but rapid urbanization and industrialization of Qingdao have imposed numerous environmental stresses on Jiaozhou Bay. The influence of anthropogenic activities on the environment of Jiaozhou Bay is discussed based on satellite images, bath...
Autori: Zhao Jun Song
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26811

Abstract Based on the study on the reformation of Dawsonite-bearing sandstones with CO2 fluids at different temperature (100oC 200oC and 300oC) and different CO2/H2O/sandstone systems, it is suggested that as the temperature increases, the corrosion intensity of dawsonite-bearing sandstones is gradually increased, but the stability of the sandstone is reduced. The SEM study shows that there are radiated aggregate sediments of boehmite in all samples. At 200oC, with the dissolving of dawsonit...
Autori: Xi-Yu Qu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26814

Abstract Waste engine oil contains hydrocarbons which are potentially carcinogenic. The objective of this study was to determine if organic wastes, specifically cow dung (T1) and poultry manure (T2) can improve the microbial degradation of the hydrocarbons. A questionnaire survey to determine generation, management and disposal of waste engine oil was carried out. A Complete Randomized Design, with two treatments and three replications was used to set up plots at Makerere University Agricult...
Autori: Richard Elijah Ssonko
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26820

Abstract It has been shown that the scale of damage in buildings with steel reinforcement, due to direct lightning strikes, is insignificantly small compared to lightning effects on buildings with no such steel reinforcement. Observed small-scale damages are also confined to points of strike; hence the only risk for occupants and properties is injury or damage caused by falling materials. A large number of such cases have been observed in Sri Lanka and Malaysia. All damaged structures, obser...
Autori: Chandima Gomes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26821

Abstract The short-term effects of plant diversity (number of plant species and species compositions) on aboveground biomass, substrate inorganic nitrogen (N) concentrations, and substrate solution “effluent” N concentrations were studied in a subsurface verticalflow constructed wetland (CW). Results showed that (1) the number of plant species increased aboveground biomass (P< 0.05) but had no effect on the overyielding index DMax; (2) the species compositions and presence of ...
Autori: Hai Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26822

Abstract The application of Information and Communication Technologies (ICT) for water supply systems has steadily increased in the last 20 years. The city of Milan is presented as case study where the main challenge for the coming 20 years is the efficient use of energy. Opposite to other parts of the world, in Milan, water is neither scarce nor there is a growing need for supply. Given that the system completely relies on pumping, optimization algorithms and sensor technologies can be appl...
Autori: Mario E. Castro Gama
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26826

Abstract Decision support systems (DSS) have been wildly developed in the recent decades, in various areas of decision making. In the 21st century, the advances in Information and Communication Technology (ICT) have brought the era of cloud computing, in which network-distributed resources (simulation and optimization models, data, etc.) are integrated in decision support applications. The aim of the present article is to present the application of web-based decision support systems (WBDSS) ...
Autori: Quan Pan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26832

Abstract A bibliometric analysis along with a brief historical and modifications overview and scientific applications was carried out to reveal the impact of Brunauer-Emmett-Teller (BET) isotherm on scientific research. The data was based on the Science Citation Index Expanded (SCI-EXPANDED) database of the Thomson Reuters Web of Science. BET isotherm received a total of 10,418 citations from its publication to 2012. Among them, 9,117 (88%) were research articles by 20,108 authors with 95% m...
Autori: Moonis Ali Khan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26839

Abstract Work accidents are a major issue in occupational safety and health. Employees of companies that offer telecommunications services are exposed to work accidents, especially during installation and operation of radio networks, operations that involve, in most cases, working at height (e.g. telecom towers or pylons). The exploiting of risk assessment tools by the ones involved in this business could cut both human and financial losses caused by workplace hazards. Starting from this pre...
Autori: Sebastian Marius Roşu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26840

Abstract Composting has been attracting increased interest in the field of organic waste management. During composting, high-strength leachate is produced with a considerable amount of organic and inorganic pollutants. Lab-scale experiments were performed for the removal of chemical oxygen demand (COD) and chloride from compost leachate using a combined membrane system. The combined system consisted of microfiltration, ultrafiltration, and reverse osmosis (RO) membranes. The COD removal eff...
Autori: Vahide Şeyda Özyaka
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26847

Abstract Free cells of Rhizopus oryzae were used to study adsorption of several cations (Cu2+, Zn2+, Mn2+, Ni2+, Cd2+ and Pb2+) from wastewater within various experimental conditions. The influence of biomass dosage, pH and temperature on the removal process was investigated. The sorption efficiency increased with increasing the temperature in the range from 25 ºC to 30 ºC and pH from 5 to 8. The maximum removal percentage was achieved at a biosorbent concentration 0.25 – 0.3...
Autori: Kolishka Tsekova
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26857

Abstract In this study, Moringa oleifera seed extract was applied as coagulant under different pH values (2.5 - 9.5), coagulant dosages (200-600 mg/L), initial dye concentrations (50-300 mg/L) and different settling times (0- 60 minutes) for R. Blue 19 and R. Red 120 dyes removal. Results revealed that with increase in pH (from 2.5 to 9.5), removal efficiency decreased from 95% to 87.3% for R. Blue 19 and from 97.2% to 62% for R. Red 120. By increasing coagulant dosage to 400 mg/L, removal e...
Autori: Ali Jafari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26864

Abstract In this paper we present results from the first European (EUR) and North Atlantic (NAT) volcanic ash exercise (VOLCEX) which includes all the warning phases associated as alerting, reactive and proactive phases. Because volcanic ash represents one of the most serious natural hazards that could affect aviation safety, the measurement campaign was focused on improving the reaction of relevant authorities in case of airspace contamination with volcanic ash and, particularly, to assess ...
Autori: Livio Belegante
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26874

Abstract Safe operation of highly thermally sensitive industrial reactors is still considered a major issue in chemical engineering practice. The problem becomes even more stringent when highly exothermic reactions are conducted under randomly fluctuating operating variables, and especially when the set-point is located in a close vicinity of the runaway boundaries for increasing the reactor productivity. This study is aiming to derive the runaway boundaries and their associated region of co...
Autori: Constantin Muscalu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26884

Abstract The paper presents a study on the hazards associated with solid ammonium nitrate (AN) storage and handling, in particular the hazard of explosion. Due to its flammable and explosive characteristics, AN is largely used as an explosive material in the mining industry. Some specific problems encountered in the risk estimation are related to the determination of the explosive power of the AN, which depends on several characteristics. The simulation results of AN explosion using differen...
Autori: Zoltán Török
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26891

Abstract Romania has recorded a dramatic number of road traffic accidents in the last five years. The latest European documents and statistics indicate that the country has the highest number of traffic fatalities across the Member States of the European Union. The aim of the paper is twofold. First, the authors aim to analyze the spatial characteristics of traffic accidents for the period 2010-2014: spatial distribution of accidents at county level, number of vehicles involved, socio-spatia...
Autori: Silviu Marian Ciobanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26893

Abstract In Palestine, environmental problems associated with industrial solid waste (ISW) have increased significantly in recent years. This paper presents survey results on current industrial solid waste management (ISWM) practices in the governorates of Nablus and Ramallah & Al-Bireh, Palestine. Solid waste generated from industries was quantified, characterized and discussed in terms of generation rate, storage, reuse/recycling, transportation, and final disposal. An attempt was made...
Autori: Issam A. Al-Khatib
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26903

Abstract The photocatalytic degradation (PCD) of methylene blue (MB) in aqueous suspensions of nano-sized TiO2 particles containing high concentrations of NaCl, MgCl2, and CaCl2 was studied. The rates of PCD and adsorption of ions were monitored by measuring the total organic carbon (TOC) and using inductively coupled plasma-atomic emission spectrometry, respectively. The results showed that the removal rate decreased with increasing concentrations of NaCl, MgCl2, and CaCl2. The trend for th...
Autori: Yuping Jiang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26910

Abstract Heavy metals are considered important pollutants found in sewage sludge. That is why sewage sludge can have a limited use as fertilizer in agriculture. Some aquatic plants can remove nutrients and heavy metals from media as sewage sludge or contaminated sediments. In this paper, we investigated the effects of different concentration levels of two heavy metals (Ni and Cd), respectively, 10, 35, 85 and 20, 50, 150 mg/kg in sedimentary media on plant uptake of Ni and Cd, considering th...
Autori: Shahram Goudarzi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26912

Adsorptive removal of dibutyl phthalate (DBP) by bamboo biochar (BC) was investigated under various experimental conditions. BC demonstrated excellent sorptive ability to remove DBP from the aqueous solutions. The removal of DBP by BC increased as the contacting time increased and reached an equilibrium value after 240 min. The presence of natural organic matter decreased the removal efficiency while increased the time to reach sorption equilibrium. The adsorption of DBP on BC could be well ...
Autori: Junliang Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26934

This study investigates the effects of earthworms and a variety of substrates on photosynthetic characteristics and rate of uptake of nitrogen (N) and phosphorus (P) by Iris pseudacorus L. (Iridaceae) in a constructed wetland system under greenhouse conditions. The study seeks to identify those factors that maximize the efficient removal of N and P. Four substrates were tested: pure sand, sand and soil, sand and organic matter, and a mixture of sand, soil and organic matter. The photosyntheti...
Autori: Defu Xu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26936

Because of their toxic effects on the food chain and sources of water, antibiotics are potential pollutants that represent an important environmental problem. The objective of this research was to study the adsorption of penicillin G (PEN G) onto chestnut shell using a batch adsorption system. Maximum adsorption was achieved at pH 3.0. The equilibrium uptake capacity (mg/g) increased with increasing levels of initial penicillin G concentration. The uptake capacity of penicillin G onto chestnu...
Autori: Amir Sheikh Mohammadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26940

A drainage channel network in Vojvodina, Serbia, made for collection and transition of (sub)surface waters from waterlogged arable land areas, is exposed to diffuse and/or point contamination sources. Over time, the channel network has accumulated sediment material containing potentially harmful organic substances such as polycyclic aromatic hydrocarbons (PAHs). In this study, the concentration of 16 environmentally relevant PAH substances from 42 sampling points in drainage channel sediments...
Autori: Radovan Savić
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26950

In the presence of surfactant sodium dodecylbenzene sulfonate (SDBS), the development of main hydrolysis products (soluble carbohydrate and protein) and hydrolytic enzyme activities (amylase and protease) were monitored during microaerobic thermophilic digestion (MATD) of waste activated sludge (WAS). Results showed that the presence of SDBS remarkably increased the solubility of protein and carbohydrate into aqueous phase. The maximal concentration of carbohydrate and protein was 990.39 and...
Autori: Qi Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26958

The grafted polymer of P(MMA-MAh)- PEGME synthesized was used as adsorbent to remove phenol in aqueous solution. Through the adsorption research of phenol, it was found the removal percentage (%) of phenol was promising when pH was less than 6. With the adsorbent dose increasing, the removal percentage increased, meanwhile the adsorption amount qe (mg·g-1) correspondingly decreased. It was taken 35h for the phenol adsorption with the grafted polymer to reach the equilibrium. The study...
Autori: Yun Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26966

Risk can be defined as the probability that an existing hazard could turn into an accident. It can be evaluated through the potential losses in the manufacturing process or the harmful level of accidents with an impact on human health, caused by unpredictable technical events. Romanian authorities have not found yet a nationwide method for evaluating the risks in the establishments that fall under the scope of the SEVESO Directive. Starting from the potential risk that an accident might occur...
Autori: Daniel-Cătălin Felegeanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26979

In past ten years area of green technologies and materials was the most growing industry sector in the world. It is related with global warming, air pollution and energy saving. Building sector intensively increased air pollution and is related with high energy consumptions. The use of renewable or recyclable materials can reduce these problems. In current work, thermal insulating materials from hemp shives and corn starch were investigated. Structures of various shives fractions were analyz...
Autori: Giedrius Balčiūnas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26992

Adsorption studies of cadmium(II) were conducted on 623oK or 723oK carbonized banana peels named as BP623 and respectively BP723 as well as on the dried ones (BP). Carbonization enhances the quality of organic by-product used as adsorbent, reduces the equilibrium time and improves the quality of the final product (water). Evaluation of the effects of pH, contact time and solution temperature showed that the uptake of cadmium(II) ions was highly dependent on these factors, and increased with ...
Autori: Josiane Ponou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27009

Within the framework of the Water Safety Plan (WSP), it is necessary to assess and to manage risks in the catchment area, considered the first protection barrier of water supply systems. The Cauca River is one of the major water resources of Colombia and the principal source of drinking water supply for the city of Cali (approx. 2,300,000 people). Taking into account, usually in developing countries, available information and specialized technical resources are limited, in this study were eva...
Autori: Andrea Pérez-Vidal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27010

Accidents in spent nuclear fuel reprocessing plants are a critical issue for the safety of people, of operators and the environment, as well as for the security of the plants. The purpose of this work is to demonstrate the possibility to use a free license code to simulate radiological diffusion after an accident in these particular plants, in order to obtain a model which allows identifying escape routes for the people potentially involved in the fallout. The authors performed a benchmark an...
Autori: Mariachiara Carestia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27015

Rice is one of the main staple foods in China and plays an extremely important role in ensuring the country’s food security. Therefore, the impacts of climate change on rice yields have garnered considerable attention. In this study, meteorological and rice yield records during 1951-2011 from the Reclamation area (RA) and general agricultural area (GAA) in the Heilongjiang province of Northeast China were used to assess the impacts of climate change on rice yield trends using multiple r...
Autori: Yang Zhou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27019

A quick and efficient response to an emergency incident is critical to avoiding further damage, so its evaluation is important before taking real action. In this study, a framework for response strategy evaluation is proposed based on a whole-process risk analysis of historical accidents, which provides a method to compare the efficiency of different response strategies in a hypothetical scenario. The framework is a multi-step procedure consisting of three major steps: system definition, inde...
Autori: Lei Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27041

Renewable resources, biopolymers and bio-based materials are keywords of the sustainable development and environmental sustainability concepts. Biopolymers, the green alternatives to fossil fuel based polymers, have already found different feasible applications, from consumer goods to regenerative medicine. Keratin is the biopolymer contained in the skin derivatives and appendages and is one of the the proteins with the most sophisticated architecture nature could produce. It is found in huge...
Autori: Hossein Rajabinejad
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27043

The effects of reconnecting three oxbow lakes to the Słupia River (northern Poland) on the fish community were analysed on the background of environmental factors. The ecological effects of restoring the hydrological connectivity of the river-floodplain system (RFS) were analysed in an intermediate time span (from 2008 to 2012). Oxbow lakes that were cut off from their mother river were characterised by a low abundance and relatively low diversity (Shannon index, H’) but high speci...
Autori: Krystian Obolewski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27055

Dam’s behavior monitoring is highly influenced by the existence of an appropriate instrumentation system installed in structure’s body, its foundation and in the neighboring area as well as by the periodical acquisition, collection, processing and interpretation of data. Existing monitoring systems may be enhanced with mobile labs that can perform regular or special measurements. Hybrid models appear to be an attractive option for the evaluation of the static and/or the dynamic be...
Autori: Altan Abdulamit
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27065

We examined the effluent from a municipal (Nyíregyháza, Hungary) wastewater treatment plant (WWTP) on hydrophysicochemical properties and on diversity, community structure, and stability of fish assemblages at the recipient low flow channel system during a two-year period. The WWTP outflow increased significantly the nutrient concentrations (e.g. NO2 and NO3 concentrations increased to 4x and 8x respectively), and the regime (with the permanent ~0.23m3/s load) at the recipient c...
Autori: Péter Takács
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27082

This work evaluates the potential of Phyllanthus debilis for the adsorption of Zn2+ and Ni2+ ions using synthetic solutions. Adsorption experiments were performed in order to examine the effect of pH, contact time, biomass concentration and initial metal ion concentration in the removal process, in a batch mode. The results revealed that the adsorption is highly pH dependent. The adsorption of Zn2+ and Ni2+ ions were concentration dependent and increased from 2.446 to 8.688 mg/g for Zn2+ and ...
Autori: Mohammad Aslam
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27084

Membrane technology has become a fundamental unit operation in the industry and society of nowadays and fouling is, probably, the most important concern related with this technology. Fouling is a complex process that can limit the performances of facilities using membranes. Many research efforts have been done in order to reduce fouling tendency. Ceramic membranes can play a major role in fouling mitigation due to its high hydrophilic nature. This paper describes the characterization of a new...
Autori: Mihaela-Elena Dascalu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27089

The release of low molecular weight (LMW) organic acids under lead (Pb) and zinc (Zn) stresses in Typha latifolia (T. Latifolia) and Vetiver zizanioides (V. zizanioides) were investigated. In addition, changes in antioxidative enzymes: superoxide dismutase (SOD) and peroxidase (POD) in the leaves of T. Latifolia under Pb stress were also examined. Amongst the eight types of LMW organic acids detected in the present study, oxalic acid was found to be the most dominant during Pb and Zn treatmen...
Autori: Yu Bon Man
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27092

In this study, an interval-parameter queuing model (IPQM) for planning a municipal solid waste (MSW) management system with cost-effective objective is developed through introducing the queuing model with limited capacity into an interval-parameter linear programming (ILP) framework. IPQM can examine the effects of limited queue capacity on waste-flow allocation pattern and system cost under uncertainty. Random vehicles have to wait in queue due to limited capacities for disposing MSW, leadin...
Autori: Yongping Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27094

The concentrations of isopropyl alcohol were monitored during the working time (8 hours) in three different printing plants (two sheet-fed offset and one digital) in Novi Sad, Serbia, using portable gas chromatograph. The concentration levels were below the recommended limits by the U.S. National Institute for Occupational Safety and Health. Unequal presence of isopropyl alcohol in printing plants involved a multiple linear regression analysis of microclimate parameters using program ORIGIN 5...
Autori: Jelena Kiurski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27096

This research focuses an examination of municipal solid waste (MSW) generation and composition in Amasya, providing overview of the current state of MSW management, an analysis of existing problems in MSW collection, separation, recycling and disposal. Municipal solid waste comprises more than 95% of Amasya’s solid waste, while three other types of solid waste comprise less than 5% of it, namely industrial waste (3.5%), hospital waste (1.0%) and construction and demolition waste (0.5%)...
Autori: Semra Çoruh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27099

The research presented in this paper aimed to investigate the relationship between sludge anaerobic biodegradability and degree of sludge disintegration based on COD (DDCOD) in a wide range from 0 to 66.7%. Sonication as an advanced sludge pretreatment was used to disintegrate sludge. Meanwhile, biogas production in the anaerobic digestion process was used to present the sludge biodegradability. The performances of anaerobic digestion for pretreated sludge at different degrees of disintegrati...
Autori: Shuyu Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27100

In order to improve the soil fertility, several eco-friendly alternatives to traditional cultivation practices have been proposed. The use of biofertilizers, such as rhizobacteria with different plant growth promoting properties is an environmentally-friendly option to achieve sustainability in agriculture. In this context, two bacterial strains (Bacillus pumilus R3 and Pseudomonas lini R7) isolated from the rhizosphere of runner bean plants were assessed for their plant growth promoting abil...
Autori: Gabriela Mihalache
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27108

Intensive agriculture has become an indispensable practice because it has to meet the needs of increasingly large yields to feed the population of the planet. In recent years, tough challenges to increase the efficiency of bioconversion were performed, since the conventional system has negative impacts on the environment, especially on health products by low intake in nutrients. In this context, the aim of this study is to show the effects of fertilization measures, which improve the quality ...
Autori: Daniela Cristina Dimitriu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27110

This paper presents an analytical approach to the evaluation concept of professional risk specific to activities of controlled demolition with civil use explosives of industrial/civil objectives, ensuring the appropriate level of safety to the effects generated by performing blasting to these types of constructions. The scientific research highlighted in this article was performed within the Project PN 7:45 1:28 in the frame of The National Programme for Research and Development CORE/2014. Th...
Autori: Gabriel Dragoş Vasilescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27141

During the Twelfth Five-Year period (2011-2015), agricultural sources have been incorporated in the total emission reduction policy for the first time in China. The discharge from livestock and poultry industry has become a focus for increased research. Based on the present situation of total emission reduction from livestock and poultry industry, this paper analyzes the pollution reduction problems such as data, measures and regulations, and provides the suggestions such as “reliable d...
Autori: Yueying Wu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27148

This study investigated the different behavioral responses of zebrafish (Danio rerio) under sudden stress from two types of chemicals (heavy metals and insecticides) and explored the correlations of behavioral responses and several well-known biomarkers. Adult zebrafish were exposed to cadmium (Cd) and deltamethrin for 5 hours. An increase in avoidance speed and turning frequency was first detected behavioral response. The duration of hyperactivity was almost 50 min in the deltamethrin expos...
Autori: Yi Huang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27149

A submerged membrane bioreactor (MBR) was applied to treat digested piggery wastewater (DPW). The removal of chemical oxygen demand (COD), ammonium-nitrogen (NH4-N), two kinds of heavy metals and ten kinds of antibiotics were studied. The hydraulic retention time (HRT) was gradually shortened from 12 days to 2.7 days, by which correspondingly the volumetric COD loading rate was increased from 0.4±0.1 to 2.8±0.6 kg /(m3·d) and volumetric NH4-N loading rate was increased fr...
Autori: Rui Liu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27150

China has witnessed a rapid growth of livestock breeding industry. Pollution from livestock breeding industry has also increased unprecedentedly and become a big issue of environmental quality. China has attached great effort to address the issue associated with intensive livestock breeding. In 2009, China and New Zealand started a cooperation project on pollution prevention and waste emission reduction in dairy industry. It is meaningful to borrow experience from well-developed countries to fac...
Autori: Jinping Tian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27152

Ozonation of oxytetracycline in aqueous solution with an activated carbon (AC)-supported cerium oxide (CeO2/AC) catalyst was conducted. The activity and stability of CeO2/AC, and the effects of ozone dosage, catalyst dosage, reaction temperature, initial oxytetracycline concentration, and initial pH on the catalytic activity of CeO2/AC for the removal efficiency of total organic carbon (TOC) were investigated. It was found that CeO2/AC catalyst was efficient in TOC removal during ozonation of...
Autori: Zheng-Qian Liu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27156

This study examines the impact of the chemical oxygen demand to nitrogen ratio (COD:N) on nitrous oxide (N2O) emissions during N removal via a nitrite (NO2−) pathway for synthetic livestock wastewater treatment. Based on typical cycle operations, 1.07 ± 0.07% of the incoming N load was emitted as N2O at a COD:N ratio of 3:1. This was higher than the 0.83 ± 0.08% emitted at a COD:N ratio of 6:1. The low COD:N ratio in the synthetic livestock wastewater may thus cause increa...
Autori: Qiang Kong
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27157

It is of great concern to reduce greenhouse gases (GHG) and ammonia (NH3) emissions from animal manure composting in China. The purpose of this study was to investigate effects of adding red mud on emissions of GHG (methane (CH4), nitrous oxide (N2O)) and NH3 in full-scale swine manure windrow composting. Two full-scale swine manure windrow composting experiments were carried out to compare emission of GHG and NH3 with and without addition of red mud. Results showed that the addition of modified...
Autori: Chenyang Zhao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27158

A combined system of up-flow cyclic sludge bed (UCSB) and aerobic nitrification reactor (ANR) was designed for organic matter and ammonia nitrogen (NH4-N) removals of swine wastewater. The UCSB had one acidogenic zone for hydrolytic acidification to solve the problem of poor carbon source in swine wastewater, and the other zone for denitrification. Results showed that average removals of the chemical oxygen demand (COD) and NH4-N were 92% and 95%, respectively, under the following conditions...
Autori: Jie Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27160

Nowadays environmental protection has become a valuable asset for the entire society. The information based society can provide more efficient solutions in its risks mitigation. There are already in place complex infrastructures used to monitor and control the natural environment, but most of them have lower or no interdependency. A solution to gain this integration level is represented by the “smart cities” concept. This study will present an approach used to integrate almost eve...
Autori: Mihai Horia Zaharia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27164

An electro-Fenton process was carried out using undivided cell containing tridimensional graphite felt cathode for treatment of real textile wastewater. The study is essentially focused on effects of pH, applied current and transition metal types (Fe2+ and Cu2+) as catalysts on the electrochemical degradation efficiency based on color and COD removal and BOD5/COD value. The results indicated that pH 3 and applied current of 150 mA are the optimum conditions for decolorization and COD removal of ...
Autori: Akbar Eslami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27167

A new material containing 2-(2′ thiazolylazo) p-cresol (TAC) grafted poly acrylamide (PAA) was prepared and its adsorption ability was studied for the removal of inorganic mercury from aqueous media. Adsorption of Mercury (II) ions from aqueous solution was investigated in detail as a function of mercury concentration, pH, ionic strength, and temperature. The adsorption data were analyzed by using the Langmuir, Freundlich and Dubinin-Radushkevich (DR) models. The adsorption of Mercury (...
Autori: Selçuk Şimşek
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27170

Convergence, that is the concentration of human populations into small areas, has been common throughout history. However, convergence has now reached historically unprecedented levels. Historically, convergence has tended to increase the long-term risk to humanity caused by many factors, including the associated environmental damage. Large cities appear to be at greater risk of unforeseen disasters, and may even collapse when some maximum sustainable size is exceeded. Based on a review of publi...
Autori: Xin Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27173

Against a background of growing concern with environmental issues, resource consumption and waste production in the construction sector, this article presents the results of a study on the implementation of environmental management systems (EMS) certification in Portuguese construction companies. It reports on how construction companies perceive motives, difficulties, benefits and effectiveness of implementing EMS certification. A questionnaire served as the basis for data collection. It was sen...
Autori: Caroline Dominguez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27174

The need for ensuring safety of energy supply, as well as the tendency to reduce greenhouse gas emissions has led to greater use of energy efficient technologies and renewable energy sources. Cogeneration (combined production of heat and electricity) is one of high-efficiency technologies, because the losses of primary energy are less than losses from the separate generation of heat and power. Consequently, in 27 EU member-states 70% of the district heating is based on cogeneration plants. Us...
Autori: Vladimir Vukašinović
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27177

A natural Cretaceous sodium (Na) bentonite from North Patagonia, Argentine, is considered a potential construction material for landfill liners. It is studied alone and in mixtures with sand. Physical and chemical properties of the Na-bentonite were determined to verify the suitability of this material for the construction of low permeability mineral liners. Hydraulic conductivity measurements were conducted on pure bentonite and on mixtures of poorly graded sand with 3, 6, 9 and 12% of Na-bento...
Autori: Telma Belén Musso
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27190

In this paper low power microwave radiation impact on Zea mays root meristeme tissues was investigated. Seeds with uniform genophond were exposed for 3 hours at 10 W incident power level in controlled condition to continuous wave at three different frequencies (0.6 GHz, 1 GHz and 2.5 GHz) and let to germinate after electromagnetic exposure. Dosimetric assessment made experimentally and computationally allowed the proper energetic characterization of the interaction between vegetal tissue and rad...
Autori: Mihaela Răcuciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27196

In this paper new techniques for the analysis and improvement of the transfer function of a low-pass filter made in planar electromagnetic technology are proposed. The low pass filter is a fundamental element of the filter used for conduction electromagnetic interferences suppression. For this purpose, in order to determine the filter’s transfer function, 3D electromagnetic CAE (Computer Aided Engineering) are coupled with simulation software programs which use equivalent electric circ...
Autori: Adina Racasan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27198

In order to limit personnel exposure to electromagnetic fields, safety standards provide among others, limitations in terms of induced currents in limbs, which is the measurable quantity allowing the evaluation of thermal load in limbs in the real conditions of electromagnetic radiofrequency exposure. Using a clamp-on current meter, eleven subjects were measured for current passing through their feet during the use of backpacked radio equipment, configured in various operating modes while using ...
Autori: Annamaria Paljanos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27204

Date pits were used as a low-cost adsorbent to study the effective removal of copper (II) ions in an aqueous solution on the basis of adsorption kinetics and isotherm equations. Before and after the adsorption process, the date pits were characterized by electron scanning microscope (ESM) as well as Infrared spectroscopy (IR). The effects of the pH, zero point of charge, the adsorbent mass, and the adsorbent particle size on the adsorption of copper (II) were also studied. Equilibrium data were ...
Autori: Tarek E. Khalil
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27212

In this study, Response Surface Methodology (RSM) was applied to investigate both the effects of biodiesel percentage in fuel mixture and engine operating parameters (engine load and engine speed) on emission characteristics (unburned hydrocarbons (HC), CO and NOx) of a diesel engine. The optimization of biodiesel percentage in fuel mixture and engine operating parameters also was performed using the desirability approach of the response surface methodology for lower emission characteristics. Th...
Autori: Alireza Shirneshan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27217

In the present study, the effect of chitosan as an eco-friendly coagulant aid was investigated for removing turbidity (bentonite) and humic acid (HA) in the coagulation process. The effects of various operational parameters such as initial pH of the solution (4-9), dosage of chitosan (1-4.5 mg/L), dosage of alum (10-40 mg/L) and initial turbidity (10-150 NTU) were investigated. An artificial neural network (ANN) model was used to predict the performance of turbidity removal efficiencies by coagu...
Autori: Abdolmotaleb Seid Mohammadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27223

This study was carried out to assess the efficiency of down-flow hanging sponge (DHS) system for decolorizing the reactive dyes wastewater. The reactor was operated at different hydraulic retention times (HRTs) of 1.7, 3.5 and 6 h., and organic loading rates (OLRs) of 3.6, 2.2 and 1.3 g COD/l.d., respectively. The results obtained indicated that increasing the HRT from 1.7 to 3.6 h., significantly increased color and CODt removal efficiencies from 81±6.7 to 91.7 ±8.7% and from 24.2...
Autori: Ahmed Tawfik
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27224

This study compared performance of the O3/UV process and biotrickling filtration as standalone and combined system on elimination of toluene from a waste gas stream. The performance of the bench scale O3/UV reactor was investigated with inlet toluene concentration of 650 ppmv and reaction time of 7.5 s. The results demonstrated that the combined O3/UV process degraded 34.1% of toluene under the selected conditions. The biotrickling filter had a maximum elimination capacity of 125.6 g/m3.h, corre...
Autori: Gholamreza Moussavi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27228

Studies about microwave (MW) sludge conditioning method have dealt mainly with municipal secondary sludge processing. We considered necessary to examine the applicability of the microwave process for other type of sludge, such as primary sludge originating from the food industry. The aim of our work is to identify the main influential operating parameters of MW pre-treatments applied for primary meat processing wastewater sludge (MPWS) as a conditioning process, followed by their optimization fo...
Autori: Sándor Beszédes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27236

Availability of alternate fuels for cogeneration helps to limit the amount of bagasse as fuel at sugar plants and make them available for other uses such as paper manufacture or ethanol production. Due to the increased awareness on the adverse effects of carbon dioxide emission on the environment, power plant operators are compelled to reduce emissions of pollutants during cogeneration. Selection of low pollutant fuels, tapping of renewable energy and use of efficient operating policies can help...
Autori: Faisal Pazheri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27244

Public awareness and concern with impacts of pollution on multimedia environment have been greatly increased in the last few decades. There are growing needs for creating remediation strategy and setting effective standard and regulations to reduce pollutant levels in the environment. To satisfy such need, tools that can provide comprehensive understanding and characterize the behavior of chemical in the environment are required for environmental risk assessment and management. A new integrated ...
Autori: Zhi Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27251

The electrochemical disinfection of effluents from poultry waste anaerobic digestion was investigated. The influences of electric current densities, electrolyte species and dosages, effluent turbidity and concentrations on the bacterial inactivation were determined. The efficiency of inactivating bacteria in the effluents by electrochemical treatment increased with increasing the electric current density and electrolyte dosages. Treatment with the addition of HCl as electrolytes resulted in the ...
Autori: Mengzi Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27252

Reuse of grey water is an attractive option when available water supplies are limited, and can reduce demand on water supplies and provide additional water resource. This comparative research was conducted to assess the suitability and effects of reusing grey water, treated and untreated, as irrigation water for vegetables, compared with tap water. Tomato (Lycopersicon esculentum) and green bean (Phaseolus vulgaris) plants were selected as examples. The collected grey water samples were treated ...
Autori: Jehad Y. Al-Zou by
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27254

The paper is focused on the sustainability of packages manufactured from corrugated board. The arguments proving that corrugated board is an eco-friendly material intended for goods packaging are discussed considering carbon footprint, water footprint, Life Cycle data released as a result of comprehensive analyses elaborated by specialized bodies and scientists. A “cradle-to-cradle” approach is promoted since corrugated board is fully recyclable, it is reusable and easy disposable. M...
Autori: Teofil Câmpean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27290

Construction industry uses a huge quantity of traditional and modern building materials which generally are produced to satisfy different demands, such as: resistant and safety requirements, friendly with the environment, architectural aspects etc. Researches must solve any requirements related to materials properties and offer a large diversity from which the proper solution must be considered. For improving the mechanical properties of polymer concrete, the use of fibers of different types is ...
Autori: Vasilică Ciocan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27306

The experimental results of studies on cement concrete with fly ash and metallic fibers are presented and are compared with a control mix. In the tested mixes five dosages of cement replacement with fly ash and two dosages of metallic fibers were considered. Mechanical characteristics such as compressive, flexural and split tensile strengths were experimentally determined. Tests results had shown that fly ash as replacement of cement generally reduced the mechanical strengths of concrete. In the...
Autori: Adrian Alexandru Șerbănoiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27307

In emergency departments computed tomography (CT) has became the most important diagnostic tool because it is a very fast and accurate method, but the main drawback of the increased number of the CT examination is the high radiation dose and the potentially increased risk of developing cancer. That why, lowering the radiation dose at a level as reasonable achievable is the most important strategy in modern medical practice. This article has two parts: first part is a review of the physics of rad...
Autori: Bogdan Dobrovăț
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27313

With population growth and increasing industrialization, enormous amounts of agro-industrial wastes are being produced. Without proper use, these keep piling up leading to tremendous pressure on environmental safety. There is also considerable economic interest not only in the proper utilization of these wastes, but also in developing appropriate processes for this purpose. Sludge generated in pulp and paper mills is one of such solid wastes. Although several studies have investigated its reuse,...
Autori: Patrícia Raquel Silva Zanoni
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27320

To evaluate the effects of seasonal fluctuations, soil types, land use and management inputs on the abundance and composition of soil bacteria, twenty soils types from Moldavia region located in north-eastern Romania were compared. Changes in soil microbiota are an early and sensitive indicator of soil pollution and can be used to predict long-term trends in soil quality. The use of microbial properties as indicator of soil pollution is easily measured and can also be measured accurately across ...
Autori: Eugen Ulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27333

The present study shows the results of the chronic test in evaluating the response of lumbricidae under the action of different concentrations of Alleato 80WG. The earthworm samples were taken from a plot of land cultivated with maize. Survival, biomass and aluminum content bioaccumulated in earthworms have been analyzed. Five replicates were carried out for each experiment. The survival rate showed maximum values (100%) for V5 (control sample), and (200 mg kg-1) (p=1) for V4. The other three co...
Autori: Gheorghiţa Brînzea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27334

Although the main reason for the extraction of methane from coal beds continues to address ensuring the safety of workers, an important driver is the need to reduce emissions of greenhouse gases. In order to identify potential technical problems specific for available technologies implementation, we performed a comparative critical analysis, based on which the technically feasible systems resulted, their further selection being based on detailed analysis in financial and investment terms. The re...
Autori: Lucian-Ionel Cioca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27350

This paper displays the results of the studies obtained according to the tests performed within INSEMEX explosives testing facilities, which concerns the establishing, on scientific grounds, of a procedure system of assessing the safety parameters for explosive charges used in fire-damp hazard mines, with a view to observe labour safety and health requirements while resorting to the safe and efficient rock blasting with explosives. As important results, it should be underlined the fact that the...
Autori: Attila Kovacs
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27356

Explosion-proof equipment must be designed so that the ignition of the surrounding explosive atmosphere to be avoided. This is very important because an explosion can have particular implications over goods, life and not least over the environment. One of the ignition sources of an explosive atmosphere is represented by hot surfaces. Each equipment designed to operate in explosive atmospheres develops a maximum surface temperature. The specific standards used to assess explosion protection chara...
Autori: Lucian Moldovan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27358

Early detection of spontaneous combustion processes through dedicated tools aimed at processing significant measurement data, can provide major improvement of safety levels in underground working environments. As an index of self-heating event occurrence, the increase in carbon monoxide content in hard coal collieries atmosphere became significant since the early stages of this severe phenomenon. To highlight the changes in carbon monoxide average levels, this paper synthesizes the results of re...
Autori: Roland Iosif Moraru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27359

Areas within which could arise explosive atmospheres having high concentrations, therefore requiring special precautions so as to guard the health and safety of concerned employees, are considered to be dangerous. If the electrical equipment used in these hazardous locations is not properly selected and installed for operating in explosive atmospheres, they are likely to generate an ignition and to result in explosion type events with significant environmental and material damages and, moreover...
Autori: Vlad Mihai Păsculescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27360

Noise causes masking effect of the safety signals and alarms, covers the warning acoustic messages of danger and reduces attention and concentration capacity. To these may be added the degradation of communication between workers equipped with hearing protective equipment and it creates difficulties to locate the direction of danger signals. This article presents two researches regarding noise exposure level of the workers on a marine platform and a gas compressing station and establishes techn...
Autori: Silviu-Nicolae Platon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27362

The spontaneous combustion of coal or self-oxidation is a phenomenon encountered both in underground mines and coal deposits on the surface, which results from heating the carbonaceous materials by slow oxidation that may occur only through the passage of air (created by air depression). Coal oxidation process generates oxidation products which are also an environmental problem. If we consider the CO2 or CO, their composition depends on the coal properties and other factors from the process. Th...
Autori: Maria Prodan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27363

Intervention and rescue activity in special conditions may be conducted only by trained and authorized personnel using individual protective breathing equipment. While working with the insulating respiratory device, there are a number of factors that make work stressful. As a rule, those working under protection of the insulating respiratory devices, besides carrying on their back a device weighing 14-18 kg, are also subject to great difficulty, in terms of securing their own safety, saving liv...
Autori: Daniel Pupăzan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27364

During the development of an underground explosion phenomenon, due to the energy of dynamic wave, important mechanical effects are registered both in the affected mine workings and in ventilation constructions (stoppings and seals, ventilation doors, regulators and air crossings). An explosion directly affects the ventilation network by modifying specific operational parameters of the main fans. This creates a different natural post event repartition of the air flows, at the branch level. In or...
Autori: Marius Cornel Șuvar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27367

Application of the occupational safety self-assessment starts with a document containing dashboard, description of the company (name, location, object activity, organization etc.), description of the work detailing with its components and a brief description of the method of self-evaluation. It continues with a Microsoft Excel document, that is the actual application method and a second document presenting conclusions and prioritizing proposals that may lead to the execution of the protection an...
Autori: Costica Bejinariu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27370

The paper is focused on a research project aiming to provide conditions for market competitiveness of producers and to guarantee the free movement of Romanian products on the EU. This is done by guaranteeing essential health and safety requirements applicable to work equipment in order to implement policies set out in the strategy EUROPE 2020. This strategy takes into account the priority of: favourable growth of inclusion-promoting an economy with a high rate of employment, ensuring social and ...
Autori: Anca Elena Antonov
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27371

Effective adsorbents were developed from sewage sludge by chemical activation with different activators (5M ZnCl2, 3M H2SO4, 3M H3PO4, 5M ZnCl2: 3M H2SO4, and 5M ZnCl2: 3M H3PO4). The developed adsorbents were used for the removal of the heavy metals Cd (II), Pb (II), Cu (II) and Mn (II) from wastewater. The effect of several parameters (pH, initial metal ion concentration, adsorbent dose, contact time and solution temperature) on the metal adsorption capacity were evaluated by batch experiments...
Autori: Mohamed Nageeb Rashed
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27385

Chemical precipitation is an effective and relatively low cost method for removal of heavy metals. The removal of lead ions from wastewater by a precipitation process was investigated using sodium sulfide and sodium carbonate. Precipitation experiments were performed using storage battery wastewater with lead concentration of 8.8 mg/L and synthetic wastewater with different lead concentration ranging from 5 to 600 mg/L. A series of experiments (each concentration) were carried out under differen...
Autori: Mehraban Sadeghi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27388

A comparative study of humic substances (HS) extracted from raw sludge and its digested product was carried out in order to analyze HS evolution during sludge anaerobic digestion. HS content, elemental composition, functional groups, infrared spectra and ultraviolet absorbances were analyzed by means of chemical and spectrographic methods. The extracted HS were also fractionated by ultrafiltration in order to obtain their molecular weight (MW) distribution. The results showed that humic acids (...
Autori: Huan Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27390

Because of increased environmental consciousness, pollution emissions reduction has been stressed by more and more governments these days, and the environmental management system (EMS) has become one approach for many firms to comply with environmental regulations. However, with rapidly changing technologies along with increasingly complicated environments, how to select a suitable EMS project has become an important issue that has never been discussed comprehensively. First, tolerating vague a...
Autori: Hsing Hung Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27391

The anaerobic digestion (AD) of fat-containing waste is often prolonged in time and problematic. Differences in AD performances could rely in a different probability for microorganisms to access the substrate. The aim of this study was to study the AD of waste cooking oil (WCO) with a biophysical approach. Two laboratory experiments were carried out using model systems consisting of WCO + hydration medium (HM) in 100 mL, static, in-batch reactors. In the first experiment, we assumed the WCO to H...
Autori: Francesca Fiume
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27409

Lignocellulosic residues are relatively recalcitrant to bioconversion during anaerobic digestion (AD) for biogas production. Pre-treatments with cellulolytic enzymes or diluted alkali can facilitate biomass hydrolysis and enhance the process. Both pre-treatments require low energy and chemical inputs, without accumulation of inhibitor. Milled wheat straw was pre-treated with hydrolytic enzymes or with diluted NaOH before AD. The pre-treatments were performed on sterilized, stabilized with formic...
Autori: Ciro Vasmara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27420

The objectives of this study were to investigate the composition of activated sludge biofilms and flocs in a sequential batch reactor (SBR) and in a sequential biofilm batch reactor (SBBR), and to evaluate the role of the extracellular polymeric substances produced in the reactors in comparison with the respective treatment efficiency of domestic wastewater, containing 1 to 40 mg/L phenol. Both reactors showed variable removal efficiencies. The SBR was found to contain more protistan species ...
Autori: Chrysi A. Papadimitriou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27422

Three different synthetic textile dyeing wastewaters were treated by a chemical coagulation/flocculation process, using ferric sulphate as coagulant. Polyacrylamide (Magnafloc 155) and polyamine (Superfloc C-573) based flocculants were applied. The influence of pH (between 3.5 and 10.4) and Fe3+ concentration (from 15 to 4000 mg/L) in both color and dissolved organic carbon (DOC) removal of polyester, cotton and acrylic dyeing wastewaters was assessed in the coagulation stage. As far as floc...
Autori: Carmen S.D. Rodrigues
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27427

A significant part of each risk informed land-use planning methodology, applied in the surroundings of Seveso installations, is the assessment of the vulnerability of all possible potential human and environmental targets. This paper focuses on the enhancement of the transparency of these methodologies, through the application of ELECTRE TRI, which is a well known and structured multi-criteria methodology. A broad set of multiple and conflicting criteria is considered, ranging from population...
Autori: Ioannis D. Mitsopoulos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27428

Urban Heat Island (UHI) is expected to be a disastrous challenge to human in the following decade as a result of continuous urbanization without appropriate planning and design. The impacts of UHI are even getting worse due to large population density with improper building design especially in dense metropolitan cities. A lot of research has been carried out for UHI phenomenon both in tropical and seasonal climates. There are many factors contributing to the formation of UHI phenomenon that inc...
Autori: Yee Yong Lee
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27438

The partial nitrification bioreactor (PNBR) was operated at a constant temperature and an influent synthetic wastewater pH of 35°C and 8.5, respectively. The effects of dissolved oxygen concentrations (DO), hydraulic retention times (HRT), and the nitrogen loading rates (NLR) on the ammonium removal efficiencies and the NO2-N/NOx-N ratio were investigated. The activity of nitrite oxidizing bacteria was stimulated at high DO concentrations. The highest NO2-N/NOx-N ratio of 0.76 was obtained a...
Autori: Sukru Aslan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27455

Mobilization of micro- and macronutrients and their uptake by Zea mays L. and Triticum aestivum L. in response to EDTA additions to risk metal contaminated agricultural soil was monitored over a three year period on the field scale. EDTA addition effectively increased the mobility of total water-soluble micronutrients (Cu, Fe, Mn) and macronutrients (Ca, Mg, P) in soil extracts. Mobilization was highest in the first year and decreased strongly over time. Elements with a high affinity for EDTA (C...
Autori: Reinhard Rauch
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27477

Fly ash ponds are dangerous for the environment because the fly ash can cause multiple harmful effects. This is cause for major concern for researchers and industry people alike. The rise of the water table level inside the ash structure may cause a loss of stability over time, with adverse effects on the environment. Therefore it is necessary to adopt efficient solutions to ensure the stability of ash ponds and rapid measures that can be applied. The use of geosynthetic materials has proven to ...
Autori: Lidia Niculiţă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27483

Nature-based tourism is increasing rapidly in China, forcing policy makers to pay ever-greater attention to the balance between tourism development and natural resource conservation. Taking Jiuzhaigou National Park in Sichuan, one of China’s most famous nature-based tourism sites as an example, this study uses travel cost and contingent valuation methods to estimate the landscape’s “use value” from recreation and users’ willingness to pay for additional measures of ...
Autori: Cheng Cheng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27499

Köyceğiz-Dalyan Lagoon is situated in the southwestern region of Turkey. The area between the Köyceğiz Lake and the sea is covered with four small lakes and numerous canals. The Dalyan Channel network connects lake to the Mediterranean Sea is one of the most important reproduction areas for Mediterranean Sea turtles. The objectives of the present study are to evaluate the influence of channel traffic and Köyceğiz Lake on the water quality of Dalyan Channel by evalua...
Autori: Başak Kılıç Taşeli
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27507

Papermaking tobacco sheet wastewater exhibits high content of fine suspended solids (SS), intensive color and low biodegradability. Through the process of electrocoagulation (EC) using aluminum anode and stainless steel net cathode, the performance of wastewater treatment and the evolution of the main components in wastewater were examined. Maintaining the pH of wastewater, with 40 mA/cm2 of current density, 2.5 g/L of NaCl for a reaction of 6 min duration, 66.1% of the total chemical oxygen dem...
Autori: Xiangjuan Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27509

Protected areas are valuable ecosystems standpoint providing various ecological processes and functions. Unfortunately, during the recent decades, population growth and human development have been changed the land use/land cover of the most protected areas in the world. Varjin Protected Area is one of the oldest protected areas. In this study, landscape metrics were used to reveal landscape patterns in Varjin Protected Area using Landsat satellite imagery from 1986, 2000 and 2010. For this purpo...
Autori: Shirkou Jaafari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27512

Average emission factors of air toxic compounds, emitted from motorcycles in Bangkok, Thailand were analyzed using the IVE (International Vehicle Emission) model. The model was utilized taking into account the actual fleet and characteristics of motorcycles of the study area. Four air toxic compounds (namely benzene, 1,3 butadiene, acetaldehyde and formaldehyde) and their emission rates were calculated under two main pollution abatement scenarios (the improvement of fuel quality and switching of...
Autori: Pantitcha Outapa
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27513

This paper introduces basic information on the biodegradation of polymers as well as the mechanisms of degradation and factors influencing this process. This paper describes prodegradant additives that induce decomposition of polymers to biodegradable compounds with regard to additives causing oxo-biodegradation. Based on the results of experiments conducted for molded pieces made of polypropylene and extrudates made of low density polyethylene with a d2w prodegradant additive, dependences betwe...
Autori: Tomasz Jachowicz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27519

An anaerobic-aerobic (An-Ox) sequencing batch reactor (SBR) was operated for the growth of phosphate accumulating organisms (PAOs), while an anaerobic-anoxic (An-Ax) SBR was used for the growth of denitrifying PAOs (dPAOs). Both reactors exhibited successful enhanced biological phosphorous removal (EBPR) performance. The sludge P contents in the two reactors increased from approximately 2% at the beginning of the operation to 9.1% (An-Ox SBR) and 7.3% (An-Ax SBR) after 140 d. The results of the...
Autori: Hansaem Lee
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27525

Galvanocoagulation (GC) utilizing metallic iron chips and granular coke was studied as a potential technique for decolorization of dye-containing aqueous solutions. GC and chemical coagulation by inorganic metallic coagulants such as iron sulfates (Fe2+, Fe3+) were examined for the removal of individual dyes, used in the fur industry, from model aqueous solutions. The role of metal cations when progressively electrogenerated in situ was compared to when they are added simultaneously. The superio...
Autori: Marina R. Sizykh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27526

Irrigation is an increasingly important practice for sustainable agriculture. Water reuse as refined or non-refined wastewater can help agroecosystem productivity. Contaminated water may influence seed germination. Two experiments as laboratory and pot were carried out to assess impact of different levels of laundry detergent and water stress on seed germination and early growth in maize. At the laboratory experiment, seeds were treated with solutions of 0, -0.01, -0.09, -0.6 MPa polyethylene gl...
Autori: Hassan Heidari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27527

A series of column experiments were conducted to study volatile contaminant (benzene) removal and process principles using soil vapor extraction (SVE) under different thermal conditions. Compared with the normal SVE method, two thermal methodssteam injection and electrical resistance heating effectively increased the benzene vapor diffusion and removal rates. The removal efficiency of benzene with the electrical resistance heating method was 96.5%, which was significantly higher than that with t...
Autori: Peng Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27534

Recently, the studies about vitamin B12 increased due to the high number of people who can develop vitamin B12 deficiency, namely: vegetarians, pregnant women or with vitamin B12 malabsorption. One solution to correct the low nutritional intake of vitamin B12 can be using food supplements or pharmaceuticals, based on the vitamin B12 microencapsulation. In the present research, the vitamin B12 microencapsulation and the controlled release of fresh and 4 months’ storage samples of vitamin B1...
Autori: Ioana C. Carlan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27559

A simple and efficient method for preparing Ag-doped TiO2 nanoparticles was successfully developed, by associating the sol-gel method and the impregnation-reduction. While titanium dioxide is one of the most used solids as photocatalyst, silver is particularly interesting for applications in biological and chemical detection and for its antibacterial properties. Moreover, in photocatalysis silver acts as an electron sink and donor in capturing the photogenerated electrons. The structural and mor...
Autori: Catalina Nutescu Duduman
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27566

Plant growth promoting rhizobacteria (PGPR) colonize rhizosphere and enhance growth in crop plants, by producing various regulatory substances. Since PGPR employ diverse array of mechanisms and exact mechanism and role are still to be established. Therefor experiment was designed 1) to identify and 2) to select potential rhizobacterial strains based on their impact on the growth, physiological and enzymatic activities of rice. A CRD pot experiment with six PGPR isolates; two containing only ACC-...
Autori: Waseem Hassan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27587

The performance and microbial community of an anoxic-aerobic sequencing batch reactor (SBR) treating saline wastewater were investigated at different influent COD/N ratios. The average COD removal efficiencies at steady states were 87.46%, 73.75%, 64.87% and 88.34% at the COD/N ratios of 20, 10, 6 and 30, respectively. The average NH4+-N removal efficiencies were 79.74%, 74.34%, 64.55% and 89.29% at the COD/N ratios of 20, 10, 6 and 30, respectively. No obvious accumulation of NO2--N and NO3--N ...
Autori: Sen Wang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27592

The hydrodynamic behavior of bubble column bioreactors (BCB) is strongly dependent on the bubbly flow regime. Therefore, the influence of superficial gas velocity (Ug) and Sauter mean diameter (d32) on gas hold up (εg) was evaluated for the cultivation of a petroleum-degrading consortium. Hydrodynamic parameters were determined by photographic techniques. Also, the biomass cultivation was quantified by suspended solids formation (SS). Our findings indicated that the d32 increased at high...
Autori: Olivia Tzintzun-Camacho
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27597

On freeways with multiple on-ramps, it is a common practice to design a ramp metering strategy so as to regulate the entering rates from ramps and minimize the disruptions on the mainline. Most of the existing studies examine the performance of ramp metering on mobility and safety, rather than their impacts on the environment. This paper focuses on the estimates of vehicle emissions along mainline freeways under various ramp metering strategies. Vehicle speed and acceleration rates were measured...
Autori: Jianbang Du
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27600

The paper presents a case study of a significant intervention conducted on a major Italian airport for improving the structural and functional properties of the runway safety STRIP in order to fulfill specific national and international standards. The STRIP had to accomplish strict requirements in terms of the maximum longitudinal and transversal terrain slope and minimum values of bearing capacity; in particular, soil bearing capacity was identified as the main lack and thus the most urgent ac...
Autori: Maurizio Crispino
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27603

Increased concern about global warming in today’s world has led to the legislation of regulations that seek to gradually reduce the amount of greenhouse gases emitted by industrial sectors and along their supply chains. This study focuses on the amount of carbon emitted in a two-echelon supply chain in which one supplier delivers a single product to a group of retailers and attempts are made to integrate and coordinate its different members. A mixed integer programming model is thus develo...
Autori: Seyed Hesameddin Anvar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27610

Tobacco is one of the most important agricultural products in the Republic of Macedonia. Elemental composition of tobacco and soil from different agricultural areas was studied for monitoring purposes. The main purpose was to determine the intensity of accumulation of various elements in tobacco plants and to determine possible relationships between certain chemical and physical properties of soils (pH, clay, cation exchange capacity - CEC, organic matters - OM and total organic carbon - TOC). T...
Autori: Biljana Jordanoska
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27625

The growth of a non-axenic Phormidium bigranulatum-dominated mat was tested under a range of chemical parameters and types of substrate. Total biomass yield (in term of mg chlorophyll a) of mats grown on muslin cloth (0.64 mg) and cotton mesh (0.62 mg) were significantly higher than those on other substrates, such as, nylon net (0.50 mg), sands of river Sone (0.43 mg) and river Ganga (0.30 mg), rice husk (0.38 mg) and saw dust (0.21 mg). The Phormidium mat would be easy to handle in bioremdation...
Autori: Dhananjay Kumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27635

Degradation of Clindamycin phosphate (CMP) was studied in aqueous solutions by an anodic oxidation process under galvanostatic conditions. The electrolysis cell consisted of a Ti/SnO2-Sb anode, prepared by dip-coating technique, and a 316 stainless steel cathode, both of which had a surface area of 6 cm2. The effects of critical factors, including CMP concentration, current density, initial pH, and the supporting electrolyte were evaluated. The electrochemical oxidation of CMP was controlled by ...
Autori: Mitra Gholami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27639

α-cypermethrin is a pyrethroid and environmental genotoxic pesticide extensively used worldwide for agricultural applications. However, like other pesticides, it affects non-target organisms as well as target organisms and causes various toxic effects. To evaluate α-cypermethrin toxicity in non-target organisms, the effect of α-cypermethrin on the activity of malondialdehyde (MDA, an indicator of lipid peroxidation) content, antioxidant enzymes (superoxide dismutase, SOD; perox...
Autori: Ozkan Aksakal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27647

Dam construction in Cuba and their use for freshwater aquaculture development are explained. Some of the environmental impacts of Cuban freshwater reservoirs, particularly in fisheries, the salinization of coastal lands, and effects on marine fisheries, are reviewed and analyzed. Some argumentation and explanations given are in response to remarks on the impact of Cuban dams on species composition of reservoir fishery landings and on coastal marine fisheries. The main impacts of dams are on estu...
Autori: Luis Alvarez-Lajonchčre
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27653

In this research, effects of in-line coagulation on permeation flux (PF), flux reduction (FR) and total organic compound rejection (TOC R) of synthesized mullite-allumina MF ceramic membrane (with 50 wt % alumina content) during treatment of synthetic oily wastewater in were investigated. Four coagulants ((ferrous chloride (FeCl2.4H2O), ferrous sulphate (FeSO4.7H2O), aluminum chloride (AlCl3.6H2O) and aluminum sulphate (Al2(SO4)3.18H2O)) plus equal concentration of slaked lime in form of calc...
Autori: Mohsen Abbasi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27659

Timber harvesting activity represents one of the major sources of the forest terrain erosion. Several studies have been performed in order to quantify the rate of soils erosion by considering the practices used in forestry, and some of them concluded that the associated erosion can be regarded as the price of having roads. The current study focused on the used practices in developing skidding trails and the associated erosion phenomena. There was found that some of the used practices (the lon...
Autori: Cristian Ionuţ Duţă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27673

The changing characteristics of vegetation carbon patterns in the karst region of northwest Guangxi, China and their impact factors were analyzed on the basis of vegetation inventory data from 2005 to 2010. A radial basis function network model (RBFN) was constructed using data from 1377 samples and 13 environmental factors. The results for the 5-year study period were as follows: (1) The total carbon storage of vegetation had increased with an annual growth rate of 1.84% and the carbon density ...
Autori: Mingyang Zhang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27692

Salt tolerance was studied in eight upland cotton cultivars (CIM-446, CIM-473, CIM-496, CIM-499, CIM-506, CIM-554, CIM-707 and SLH-284) under four NaCl salinity concentrations (50, 100, 150 and 200 mM) and control. Significant (p≤0.01) variations were observed among cultivars, salinity concentrations, and cultivar by salinity interactions for various growth traits and ions (K+ and Na+) accumulation in dry shoot and root tissues. As compared to control, the growth variables were decreased by i...
Autori: Zarina Bibi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27778

In the present study, Dowex HCR-S/H, cationic resin was used as a resin for the removal of cadmium from aqueous solutions. The experiments were carried out in a batch vessel. Subsequent experiments were performed as a function of initial solution pH, resin dosage, agitation time, initial Cd2+ concentration, solution temperature and agitation speed. Ion exchange rate increased with the increase in initial cadmium concentration, stirring speed and temperature. The Langmuir, Freundlich, Elovich,...
Autori: Baybars Ali Fil
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27777

Gaseous toluene biofiltration as affected by ryegrass (Lolium perenne L.) roots was investigated in this study. The results revealed that the populations of bacteria, actinomycetes were larger in the ryegrass rhizosphere than in the bulk soil since ryegrass provided root exudates as major nutrients available for the microorganisms. An increase in the microbial populations in a ryegrass-growing biofilter would significantly stimulate toluene biodegradation in comparison with a vegetation-free bio...
Autori: Zhongjun Xu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27772

This paper investigated the compressive strength and thermal conductivity of water and air cured Portland cement-fly ash-silica fume mortars. The results showed that density, compressive strength and thermal conductivity of blended cement mortars with fly ash were lower than Portland cement control. However, blended cement mortars that contained silica fume as replacement cement both in binary and ternary phase were higher than fly ash mixes and tends to increase with increase silica fume used a...
Autori: Chalermphan Narattha
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27731

The aim of this study is to identify the influential factors which affect the planning and construction process in coastal ecological engineering. Through the application of AHP to analyze weight, it applies the data obtained from descriptive statistics as a reference in decision-making. Research methods are by means of expert questionnaire. To understand the same and different points of views from the experts and scholars, then according to different purposes it uses the results of this study i...
Autori: Chi-Shun Hsu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27732

Petroleum hydrocarbons not only are toxic to humans and other living organisms, but will also pollute groundwater. It is thus critical to decrease the concentration of these pollutants in soil. Phytoremediation is an effective way to remove toxic compounds from soil. The current study used sorghum (Sorghum bicolor (L.) Moench) and barley (Hordeum vulgare) to reduce petroleum hydrocarbon content of contaminated soil around Isfahan Oil Refinery (Isfahan, Iran) and assessed the concentrations of pe...
Autori: Farida Iraji Asiabadi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27741

The objective of this study was to evaluate the effect of different doses of meat and bone meal (MBM) applied as organic fertilizer on the quality of groundwater in arable fields. The effect of meat and bone meal fertilizer applied at rates of 1.0, 1.5, 2.0 and 2.5 t ha-1 was compared with no fertilization, mineral fertilization, and manure fertilization (10 t ha-1). Groundwater samples for chemical analyses were collected every month during the growing season using piezometers installed in the ...
Autori: Arkadiusz Stępień
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27742

During the years 1965-1985, a veritable industrial platform was developed in the west part of Oradea, Bihor County, Romania. It stretches on an area of 9 sq. km. and is placed in the meadow of Crisul Repede River. Throughout that period, several industrial facilities were built that lately became sources of pollution for the environment. The purpose of the present paper is to study the influence of historical stages of industrialization and restructuring of enterprises in Western Oradea, address...
Autori: Tamara Romocea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27747

In this paper, the typical measurement techniques and production procedures defined in the UNI-EN guidelines for ceramic manufacture are taken into consideration to evaluate the properties and the characteristics of the bricks produced by using a mixture containing cubilot slag. The results of the experimental tests demonstrate that these measurement techniques are not enough to define the safety of the waste bricks. Up to now, UNI-EN guidelines for ceramics do not define crystallinity measureme...
Autori: Domenico Luca Carni
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27787

The Water Safety Plan (WSP) model provides a completely new, cross-cutting and multidisciplinary approach for the risk assessment of drinking water pollution. The concept of “control” of the drinking water supply system (DWSS) is replaced by the concept of “under control”, in order to protect human health. The key factor of the WSP approach is the identification and mitigation or, if possible, the elimination of all factors that may cause a chemical, physical, microbial a...
Autori: Maria Cristina Collivignarelli
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27790

Large amounts of spent coffee grounds (SCG) are currently available all over the world due to the enormous increase in coffee consumption. This increase has in turn to be related to the even greater diffusion of coffee vending machines. The aim of this study was to evaluate the biomethanation potential (BMP) of SCG alone or in co-digestion with pig slurry (PS). Pig slurry was chosen because it is frequently utilized as feedstock for biogas production from agricultural waste. The raw material was...
Autori: Ciro Vasmara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27794

Algal bloom can represent a serious consequence of the eutrophication of surface water. Some of these algae, called cyanobacteria, are of particular interest for their effect on human health due to their capacity to produce cyanotoxins. In many countries, in fact, there are important problems of poisoning attributed to toxic cyanobacteria and contamination of water sources (specially lakes) resulting in increased cyanobacterial growth. Cyanobacteria can become particularly harmful for humans whe...
Autori: Sabrina Sorlini
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27800

In this study, the effect of raw material formulation used in the core layer on the water resistance and mechanical properties of particleboard made from a mixture of rice husk and wood particles was investigated. For this aim, four series of particleboard core layer were produced from different proportions of rice husk/wood particles, different amounts of urea-formaldehyde (UF) adhesive, low density polyethylene (LDPE), and maleic anhydride grafted polyethylene (MAPE), respectively. The amounts...
Autori: Jin Heon Kwon
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27871

The corrosion inhibition of mild steel in acidic media at 303 – 333K in 0.1 - 0.5M acids (hydrochloric acid - HCl and trioxonitrate (v) acid - HNO3) and 0.01-0.03g/L Aloe Vera extract (AVE) were investigated by standard weight loss method. The corrosion rate was calculated in the absence and presence of the inhibitors. The inhibition efficiencies of AVE in both acid media increased with increase in concentration and decreased with increase in temperature and period of immersion. Results sh...
Autori: Maureen Ndibe
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27870

Ti/TiO2 films were prepared by DC reactive magnetron sputtering followed by annealing in air at 400 ºC for 4 h. Structural tests have been performed to characterize the films, showing that the prepared films present 70% of anatase phase. When these results are compared with those from TiO2 films grown on glass substrates with similar deposition parameters, it can be seen that Ti substrates favour the formation of rutile phase, which is not observed on the films supported on glass, indicatin...
Autori: Susana Sério
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27868

Environmental pollution has become a major global problem. However, despite increased environmental investment, studies have not clarified whether environmental pollution has been effectively controlled. On the basis of 1998-2014 panel data on three types of industrial waste from 31 mainland China provinces, a stochastic frontier analysis (SFA) model was used to estimate the input efficiency of environmental governance in China, explore the overall characteristics of input efficiency, and explor...
Autori: Ye Zheng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27862

Occupational health and safety (OHS) is one of the most important problem of a company because each manager should consider the workers as the most valuable resource of the enterprise. This issue is all the more important as in the last decades, the types of OHS risks have changed due to technological, social and economic advances, and companies should use new approaches and instruments to control and manage these risks. The paper focuses on the application of OHS management system as an import...
Autori: Doru Costin Darabont
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27856

High sulfide inhibited the activities of sulfate-reducing bacteria (SRB) and methane-producing bacteria (MPB). In addition, a large number of domestic sewages should be treated in China. Thus, it is the first time that domestic sewage was collected to dilute high-sulfate wastewater in this study to achieve simultaneous treatment of sulfate wastewater and domestic sewage in the anaerobic baffled reactor (ABR). The results showed that there were obvious separation of sulfate reduction phase and me...
Autori: Peng Wu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27840

This study was carried out to determine the feasibility of applying a freeze concentration technique to rarefy milking wastewater using either a stationary wastewater vessel (the first series of tests) or a rotary ice–making machine (the second series of tests). In this study, we investigated the impact of freezing temperature, initial milking wastewater concentration and vessel depth upon the removal rate of chemical oxygen demand (COD). Results show that when the freezing temperature ...
Autori: Yingjie Dai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27845

This study was carried out to determine the feasibility of applying a freeze-concentration technique to purify wastewater polluted with dye, such as methylene blue (MB) using a stationary wastewater vessel. In this study, we investigated the impact of freezing temperature, initial MB wastewater concentration and vessel depth upon the removal ratio of MB. Results showed that when the freezing temperature was decreased (from –5 °C to –15 °C), the freezing rate increased. The...
Autori: Yingjie Dai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27878

Air cooled and water cooled slag samples were obtained from a demonstration plasma gasification / vitrification unit. The leachability of the major heavy metals present (Cr, Cu, Mn, Fe, Pb and Zn) in both the air cooled and water cooled slag when in contact with acidic solutions was investigated under different temperature, stirring and contact time conditions. Water cooled slag showed better resistance to heavy metals leaching. The vitrification process immobilised Cr and Pb. The leachabilit...
Autori: Konstantinos Moustakas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27882

The catalytic hydrogenolysis of glycerol, a by-product of the biodiesel manufacturing process was studied on copper chromite catalysts with different chemical composition. The obtaining of propylene glycol was studied under mild reaction conditions (180- 240oC temperature range, 8 hours reaction time and moderate pressures). These important parameters have significant effects on the glycerol conversion and that is way the actual study was concerned to the obtaining of a superior selectivity t...
Autori: Adriana Marinoiu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27892

The aim of this study was to determine how temperature conditions (max. 72oC, 81oC and 43.5oC) during sewage sludge composting affect the distribution of organically bound heavy metals in humic substances (HS). To accomplish this, the content of Cu, Ni, Zn and Fe was measured in the two main fractions of HS, humic acids (HAs) and the fulvic fraction (FF). In the feedstock, the FF was mainly responsible for binding all metals except Ni. During composting in the two series with thermophilic con...
Autori: Dorota Kulikowska
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27894

In order to reduce Cr(VI) and Cr(III) simultaneously, a double microbial fuel cell (MFC) system was employed to treat Crcontaining wastewater. Cr(VI)-MFC used Cr(VI) as a catholyte to supply the generated power to Cr(III)-MFC, while the latter MFC functioned as an external load resistor of the former one. Buffer characteristics of the catholyte greatly affected the reduction of chromium ions. At an initial pH of 2.0, Cr(VI) removal increased from 49.9% to 99.9% when KH2PO4 was added. Keeping ...
Autori: Fang Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27896

The utilization of inorganic carbon by the red macroalgae, Gracilaria edulis (G. edulis) was investigated in this study. G. edulis were grown in brackish water aerated with varying concentration of carbon dioxide - 350 ppm (actual atmospheric carbon dioxide, CO2), 700 ppm and 1400 ppm CO2 gas. Higher growth rate was observed in culture medium aerated with 1400 ppm CO2 and the lowest growth rate was observed at actual atmospheric carbon concentration. Besides that, significant pH drift was obs...
Autori: Lavania-Baloo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27900

The synthesis of dimethylamino-propylamine pullulan, DMAPA-P, with a substitution degree of 0.4 was performed in dimethylsulfoxide using N,N’-carbonyldiimidazole as activator and dimethylaminopropylamine as amination agent. Then, two quaternary derivatives (trimethylammonium-propylamine pullulan, TMAPA-P, and benzyldimethylammonium-propylamine pullulan, BzDMAPA-P) were prepared from DMAPA-P by quaternization with methyl iodide and benzyl chloride. The behavior of new pullulan derivativ...
Autori: Anca Giorgiana Grigoras
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27902

Latest analysis regarding the climate change phenomenon arises issues related to air quality, human comfort within urban environments and an increased energy demand attributed to the building sector. The Urban Heat Island (UHI) phenomenon is directly responsible for the poor quality of life in cities and for increased energy consumption. Characteristic features pertaining to a specific urban environment, such as local microclimatic conditions, urban morphology and anthropogenic heat release ...
Autori: Adriana Lucia Kadhim-Abid
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27913

Drinking water treatment aims to avoid or minimize some risks to human health and to provide adequate water quality by removing physical, chemical and biological contaminants. However, treatment processes require increasing efforts in terms of technology, chemicals and energy inputs, which generate increased secondary environmental impacts and added water production costs. The objective of this study is to evaluate the drinking water treatment plant (DWTP) in Iasi City (Romania) by life cycle...
Autori: George Barjoveanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27922

This study was planned to identify factors which affect workers health and their safe working in unregistered and partially registered small iron units preparing 90- 95 % iron furniture under sheds. Focused group discussions (FGD) were conducted among workers of iron furniture manufacturing units (IFMU) employing a cross sectional, descriptive, analytic and time limited study. Personal interviews methodology was adopted to assess workers for their exposure to occupational risks, protective eq...
Autori: Saima Aslam Bharwana
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27925

The applicability of an electrocoagulation process with the biological treatment for the color removal of C.I. Basic Red 46 (BR46) dye was studied. It was shown that decolorization efficiency increased by increasing current density (j), pH, temperature (T) and agitation speed (ω) and decreased with the initial dye concentration [BR46]0. The optimal conditions in presence of a grid electrode (waste) used as cathode were found to be j=9 mA cm-², pH 8, T=35°C, [BR46]0=30 mg L-1 an...
Autori: Katia Madi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27927

The application of complex ecological approaches in biological wastewater treatment, assessment of its effect on the effectiveness of the process and comparison of the obtained data to the restrictions in the environmental legislation are key elements of the study. The processes in an anaerobic sequencing batch biofilm reactor, the first module from diphase anaerobic-aerobic biotechnology for dairy wastewater treatment, are investigated. The creation of highly specialized biological system by...
Autori: Irina Schneider
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27929

The objective of this paper is to review the main studies published on occupational accidents to recognize, classify and describe the scientific methodologies used. To achieve the objective set we used a method that has already been implemented and validated, consisting of an extensive review of international scientific literature related to the methodologies for investigating accidents in occupational health and safety. Then, to assess the importance of these methodologies, we analyzed the ...
Autori: Francisco Salguero-Caparros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27935

Removal of excessive ammonium nitrogen (NH+4-N) from aqueous solution has been of considerable concern for several decades. It can be removed by air stripping, a necessary prerequisite is adding enough alkali. This study presented the first attempt to investigate the potential use of ceramsite coated with magnesium hydroxide (CCMH) on the effectiveness of NH+4-N removal coupled with air stripping at ambient temperature without alkali addition. The results showed that the CCMH coupled with air...
Autori: Tianpeng Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27940

The present study explores the potential use of plant waste i.e. spotted golden thistle (Scolymus maculatus L.) stalks, as an inexpensive sorbent for the removal of methylene blue from synthetic aqueous solutions. Firstly, the waste material was characterized using different analysis methods, then kinetics and equilibrium of dye sorption were investigated using a batch sorption technique. The influence of contact time, initial dye concentration, sorbent dose, particle size and agitation speed...
Autori: Zoubida Senouci Bereksi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27941

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27946

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27947

Proper functioning of the main ventilation station depends on the mining network’s degree of ventilation. Also, knowledge of changes in instantaneous aerodynamic parameters offers the possibility of taking operational measures necessary to maintain optimal health and safety in the underground. The objective of the present paper is to identify a new method of monitoring the aerodynamic parameters at the main ventilation station. ...
Autori: Emeric Chiuzan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27949

The intrinsic safety type of protection significantly increased in complexity during the last decades. Thus, it even provides the opportunity to use highly complex electronic circuits without involving a significant explosion risk within the oil industry or in power plants, but not limited to those two. In order to achieve this performance, the type of protection is based on three pillars: limiting of energy, heat and also fault tolerance. The potential failure of components, connections, and...
Autori: Marius Darie
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27950

The purpose of this paper is to present the tests carried out on cable entries with a flameproof enclosure protection type used in potentially explosive atmospheres. Assessment of explosion-protected electrical equipment is accomplished through tests carried out in accordance with the standard SR EN 60079-0, which includes all general requirements for explosion-protected electrical equipment. The requirements of this standard are supplemented with those for each type of protection in separat...
Autori: Dragoş Fotău
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27952

In order to have a proper image of the seismic effect generated by blasting works performed in quarries, the assessment methods applied before starting the blasting activity using explosives for civil use have to take into account as many information as possible with regard to blasting conditions, type of explosive, blasting technique, characteristics of the environment in which the explosive is detonated and in which the seismic waves are generated. Given the complex mode of propagation of s...
Autori: Edward Gheorghiosu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27953

Databases on the exposure of workers to dangerous chemical agents are an important tool for assessing and managing chemical risk but also for recognizing occupational diseases caused by exposure to hazardous chemicals. Both the European Union (EU) authorities and European trade unions have recognized the need for some databases containing as much information as possible on the type and timing of exposure of workers to dangerous chemical agents. In Europe there are only a few databases for che...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27954

Intervention and rescue activities require knowledge of the real situation in the affected area as accurately as possible. Therefore, the physical exploration of this area is at the same time necessary and risky. The use of drones from a safe distance can protect the intervention team from exposure to unknown hazards. Endowment of the drone with a suite of sensors such as high resolution cameras, thermal imaging, infrared, and gas detection equipment permits vital data to be transmitted to t...
Autori: Alin Irimia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27955

The related European directives in force stipulate that product testing shall be performed in conditions that reproduce as accurately as possible the real ones that may be encountered during their operation. These are products whose intended use are specified in the safety data sheet or within the instructions for use, and whose limits of the micro-climatic parameters that can be encountered (temperature, humidity, wind - for the outside ones, temperature, humidity, generation of restricted t...
Autori: Ilie Ciprian Jitea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27956

For assessing the intrinsic safety to mechanical sparks, two dedicated methods are implemented in testing laboratories and further used for the conformity assessment of products with regard to explosive atmospheres ignition, namely: impact test and friction test. The purpose of the article is to present the results obtained by using the first method mentioned, results which shall be applied in further research for comparison with the ones resulting from the friction test. The article presents...
Autori: Adrian Marius Jurca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27957

The research carried out in the specialized Laboratory of the National Institute for Research and Development in Mine Safety and Explosion Protection - INSEMEX Petrosani has identified the causes of high pressure peaks occurrence in the case of large electric motor enclosures as: the extremely large internal volume, the geometrical shape of motor enclosures and the very intricate and complex internal arrangement of such motor enclosures, having in mind the tendency of motor manufacturers for ...
Autori: Mihai Magyari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27960

Explosion-type accidents can cause significant human losses and material damages; therefore, special attention has to be granted to explosion risk assessments and to the development of appropriate explosion-protection measures. Such measures of protection aim to reduce the explosion risk to acceptable levels, in compliance with regulations and standards in force, so as to provide the proper safety level for humans as well as to prevent damage to the surrounding goods and environment. The flas...
Autori: Marin Silviu Nan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27961

Human behavior in critical situations is at the core of all concerns about the fire safety of buildings, regardless of their destination. The way in which the human caught in the fire reacts to the risk factor to which he is exposed, his behavioral response to the direct action of the fire, or his psychological response to the effect of the fire (temperature, smoke opacity, reduced visibility, exposure to toxic combustion gases), are all factors that can drastically influence the required saf...
Autori: Marius Cornel Şuvar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27965

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27968

The objective of this research was to analyze the factors present in occupational accidents occurred at work among Municipal Solid Waste (MSW) workers. Garbage, and rubbish from household waste were considered as MSW. The study was based on a total of 11,935 accidents occurring and reported in the MSW sector during the period 2009-2012 in Andalusia (Spain), as well as a survey of 572 workers in the above mentioned sector conducted in 2009. All the variables included in the accident reports we...
Autori: Antonio López-Arquillos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27993

In this study the effectiveness of Lactuca sativa, Medicago sativa and Phragmites australis for the treatment of domestic wastewater in horizontal subsurface flow was investigated. The removal efficiency of chemical oxygen demand (COD), total nitrogen (TKN), total phosphorus (TP), and total suspended solids (TSS) was measured. The experiment was conducted in two different retention time (5 and 7 days) in three seasons (spring, summer and fall). The removal efficiency was increased as the rete...
Autori: Farham Aminsharei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28009

This paper discussed the results of studies regarding metal ions distribution in water, sediments, aquatic plants and different tissues of fish from Snagov Lake, Romania, a natural lake situated 25-30 kilometers north from Bucharest, the capital of Romania. The concentration of several metal ions (Li, Ba, Al, Pb, As, Se) was measured in three points of the lake, namely receiving-input, middle and discharging-output ponds. The samples were collected during spring time from water, sediments, Ce...
Autori: Daniela Simina Ștefan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28010

The coal gas is a potential risk for the safety production in coalmines. The practical experiences in coalmine show that the gas may suffer massive desorption and migration after coal seam mining and deformation of overlying strata. Therefore, gas extraction in mines focuses on mining ground pressure relief gas extraction. In this paper, the study is carried out on gas permeability and migration pathway based on movements of overlying strata over the working face and the spatial location of t...
Autori: Jianwei Cheng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28019

This paper presents an interdisciplinary methodology for handling the exposure of workers to lead and its compounds in a systematic way by connecting different disciplines, and thus enabling the comprehensive supervision of the workplace exposure. The exposure of workers to lead and its compounds was studied in the Republic of Slovenia. The research comprised 1079 employers being exposed to the lead concentrations between 0.01 and 0.9 mg/m3, which exceeded the limit value by 9 times. Workers ...
Autori: Lidija Korat
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28032

In the eastern part of Romania, there are a lot of reservoirs of water whose age exceeds 30-40 years. They were built taking into account the existing norms and the specific environmental conditions at that time. Over time, there have been numerous changes in the parameters that define how these water reservoirs are exploited, which have questioned their safety in operation. The deforestation that has taken place over the last 30 years in Romania and the climate change have led to the emerge...
Autori: Petru Cercel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28046

The influence of 50 Hz sinusoidal magnetic field on physico-chemical properties of water was studied. Tanks with distilled water (120 mL) were individually exposed to action of homogenous 50 Hz magnetic fields, using a Helmholtz coils system. For magnetically exposure have been used different values of magnetic flux density (between 1 and 5 mT) and different durations of exposure (between 5 and 240 minutes). By means of this experimental study the physico-chemical properties of exposed water sam...
Autori: Mihaela Răcuciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28061

Iodine is an essential microelement required by humans and animals. Leaching of soils under intensive rains has threatened the fertility status of iodine in soils. Therefore, four discrete amendments were used for the mitigation of iodine leaching from soils. For this study, soils collected from four land uses were mixed with the amendments (gypsum, lime, fly ash, charcoal and sawdust) at the rate of 0, 2.5% and 5% (w/w) in PVC columns. Potassium iodide (KI) was applied to the soil at rate of 10...
Autori: Muhammad Mohiuddin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28071

Cost effective management of construction and demolition waste (C&DW) has become a serious issue with increased construction activity and modern urban lifestyle which is damaging environment, eating up resources and causing rapid land use changes. These factors have influenced the construction industry significantly and therefore gained the practitioners’ attention in recent past. New strategies of C&DW reduction management are being devised and reported; this research aims at prov...
Autori: Ahsen Maqsoom
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28096

We used windbreak nets to reduce erosion and sediment transport in a semiarid area. A 13x30thread·cm-2 and 39% mesh net facing the wind increased average erosion reduction up to 72% at a height of 0.4 m in recently tilled olive groves. The use of sonic anemometry techniques for identifying wind movement patterns has rarely been exploited for improving field studies, and much less for windbreaks. Sample components collected in traps placed at different heights and distances from the windbr...
Autori: Carlos Asensio
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28099

Wastewater generated from industrial activities has delivered elevated heavy metal concentrations into fresh and salted aqueous systems. Herein, the migrated trace metals were studied from their initial location through a coastal aquifer up to the seawater. The experiments were carried out at lab scale using a sandbox with glass beads and two attached chambers containing natural groundwater and seawater. The study focused on the transport behaviour of heavy metals such as copper, zinc and lead i...
Autori: Abdelkader Tawfeek Ahmed
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28111

The research focuses on the assessment of the main agro-productive properties and the evolution of the mollic reddish (red-brown) preluvisol between the Jiu and Olt rivers, under the new conditions of soil formation and exploitation, created after radical transformations in Romanian agriculture, when most of the lands were passed from state to private ownership. The first comparative analysis of the properties of the soil that evolved on the terrains utilized for crop culture on farms and agrito...
Autori: Jenica Călina
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28128

In Spain, most substrates used in the production of plants in containers, are composed of peat in combination with other components such as pine bark, perlite or vermiculite. In order to find alternatives to the use of peat, shredded switchgrass (Panicum virgatum L.) biomass was evaluated as a component of the substrates. Five substrates were prepared with the following proportions, by volume, of commercial substrates:switchgrass: 100/0, 75/25, 50/50, 25/75 and 0/100. Pots were filled with the ...
Autori: Jose Alberto Oliveira Prendes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28134

There are considerable environmental and health and safety concerns regarding liquid crystal display (LCD) waste glass because of the waste electrical and electronic equipment (e-waste) that is deposited in landfills. In current study, the effect of variation in LCD waste glass on the deconvoluted fractions of silicon centers of metakaolin geopolymers has been comprehensively investigated to discover the underlying mechanisms governing the performance. Solid/liquid ratio affects the kinetics of ...
Autori: Kang-Wei Lo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28146

Apart of new equipment’s development such as absorption columns with higher efficiency, for chemical industry, there is a strong need for greenhouse gases reduction in order to assure the environmental protection and, consequently, many studies regarding the purification methods of exhausted gases have been performed. There are several types of reactors used for gases purification, such as: bubbling jet reactor, combined packed and spray tower absorber, cable wet scrubber and packed column...
Autori: Elisabeta Droniuc Hultuana
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28160

Growth rate and biomass yield in the case of Arthrospira platensis depend on nutrient availability, temperature and light, which can determine changes in the metabolism and therefore in the biomass composition. The aim of this study is to evaluate the behavior of A. platensis during the growing time in several liquid culture media and their influence on the yield of biomass production. The following culture media have been investigated in this sense: ARS, Zarrouk (Z), modified Zarrouk (MZ), eco...
Autori: Mariana Diaconu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28163

Environmental quality is directly influenced by the level of pollution generated by economic, industrial or anthropogenic activities and directly affect the citizens’ life quality and wellbeing, and ensuring a good status of environment it is a stringent topic that must become the major interest for the local public authorities. The main goal of this study is to evaluate the environmental quality in Iasi city, how the overall quality is influenced by the level of pollution and what are the...
Autori: Silviu Petru Grecu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28180

In cold, high-latitude regions, snow evaporation can significantly influence the snow water equivalent and thus change the regional water balance in early spring. In order to explore how the snowfall event and environmental factors affected the snow evaporation rate in the northern Daxing'an Mountains in China. From the snow melting period of March 2016 to April 2018, the eddy covariance method was used to explore the relationship between environmental factors and snow evaporation. The resul...
Autori: Youwei Lin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28181

Since the era of the Industrial Revolution, energy consumption has considerably increased. As a consequence, a significant rise in greenhouse gas emissions has become a serious threat to environmental sustainability through climatic changes, global warming, natural disasters and pollution. In this context, increasing energy efficiency as well as the use of renewable energy can serve as important instruments for reduction of greenhouse gas emissions. The related literature has thus far generally ...
Autori: Yilmaz Bayar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28185

Interest in water recycling has provided opportunities to evaluate the potential impact of pharmaceuticals and personal care products (PPCPs) on plants where recycled wastewater is used for watering and irrigation. Most researches have focused on the impact of pharmaceuticals on seed germination and plant physiology or the uptake of pharmaceuticals into plants. We sought to find out whether nutrient and metal uptake into wheat plants were affected by the presence of PPCPs (acetaminophen, caffein...
Autori: Etem Osma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28193

Copper and Zinc co-doped titania nano photocatalyst (Cu-Zn-TiO2 NPC) was fabricated and characterized using room temperature X-ray diffraction (XRD), field emission electron microscopy (FESEM) with high-resolution transmission electron microscopy (HRTEM) and energy dispersion X-ray (EDX). X-ray diffraction studies of the Cu2+-Zn2+/TiO2 show the presence of anatase phase TiO2 and in the sample prepared from 0.05, 0.10, 0.15 and 0.20 mmol have also shown the presence of anatase phase only. The ph...
Autori: Tentu Nageswara Rao
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28198

A water distribution network’s (WDN’s) flow capacity decreases over time mainly because of the unplanned demand growth at its consumption points, increased water loss, and increased internal roughness caused by aging of pipes. In this context, this work presents a new performance indicator, the Carrying Capacity Indicator (ICC). It will enable utility managers to evaluate WDNs’ hydraulic and energy efficiency. The ICC was applied in a real case study: a sector of the Joã...
Autori: Heber Pimentel Gomes
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28200

Nine samples of recycled acrylonitrile butadiene styrene (ABS) with organic montmorillonite and fire retardants adding were combined to prepare ABS copolymer nanocomposites. A very good dispersion of clay and fire retardant was noticed in the recycled ABS (reABS) matrix. The effect of montmorillonite and fire retardants on the mechanical and thermal properties of the reABS nanocomposites was further investigated. Experimental results showed that the addition of organic montmorillonite increased ...
Autori: Tudor Mihai Simionescu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28203

This study shows the impact of tree- and forest-level variables on epiphytic lichens within four managed forest fragments. Additionally, the impact of human activities, such as pastoral activities and timber harvesting, on epiphytic lichens is taken into account. At the tree level, a pertinent ecological pattern with regard to lichen abundance could not be supported by the obtained results because the effect of tree and forest variables (aspect and shrub cover) was significant only on a few lich...
Autori: Ioana Vicol
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28205

LED waste quartz sand (LEDWS), which is a prominent by product of the LED manufacturing process, may contaminate the environment because it comprises specific heavy metals (e.g., As and Cu), which are hazardous ingredients to the environment when disposed of improperly. Therefore, this study investigated the use of light-emitting diode (LED) waste quartz sand to partially replace Portland Type I cement (OPC) to evaluate the feasibility of reusing it as a pozzolanic material. The SiO2, Na2O, and ...
Autori: Kae-Long Lin
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28207

The study is focused on creating magnetic mesoporous materials through the insertion of a nickel ferrite into the structure of kaolintype clay. Sol-gel auto-combustion method was employed to synthesize the materials, using glycine and tartaric acid as chelating/combustion agents. This is the first study on the combined effect of different fuel agents and of clay-to-ferrite molar ratio on the structural, textural, magnetic and adsorptive properties of nanocomposites. The value of the average por...
Autori: Stefana Cojocaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28210

Within the International Classification of Standards (ICS), the field of Environment, Health Protection and Safety is classified as ICS1 = 13, i.e. ranking 13th among 40 fields at the 1st classification level. The field includes 21 subfields at the second classification level (ICS2). This research aimed to analyze the intensity of innovations in 5 of those second-level subfields (environmental protection, wastes, air quality, water quality and soil quality). The chosen fields cover the broadest ...
Autori: Marija Blagojević
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28214

Printed circuit boards are the most important component of any electrical and electronic device. The average metal content in waste printed circuit boards is ~30-35% whereas the rest of the material is a non-metal fraction (NMF). Metals in the waste printed circuit boards are recycled for their value whereas the NMF is mostly sent to landfills or incinerators for disposal. The circuit board laminates contain flame retardant chemicals that pose potential hazards to the environment and to public h...
Autori: Amit Dhir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28216

Diesel oil (DO) as a mixture of alkanes and aromatic compounds causes damage to the ecosystem in terrestrial and aquatic habitats. One of the best methods of treating contaminated areas is to use microorganisms in a bioremediation method that can degrade pollutants. The aim of this study was to isolate indigenous bacteria with high biodegradation potential of DO from oil-contaminated wastewater. Bacterial isolation was performed using a mineral medium containing contain 1% DO as the sole source ...
Autori: Sharareh Dashteepour
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28224

The negative environmental impact of the shooting ranges occurs through shot and bullets containing metals that are harmful to the environment. The objective of this study was to investigate the changes in physicochemical properties and contamination with heavy metals in soils of two Lithuanian outdoor shooting ranges. Soil samples were collected from the outdoor rifle shooting ranges which differed in shooting activity. The higher concentrations of Pb were found in the shooting range (8272 mg ...
Autori: Gintarė Sujetovienė
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28227

In this study, the effects of possible climate change in a 36-year period (1980-2015) in different sites on the spatial-temporal distribution of chestnut forests in the Eastern Black Sea region of Turkey were investigated. For this purpose, Giresun, Trabzon- Arsin and Artvin-Hopa in the Eastern Black Sea region were selected as the study areas. The Mann-Kendall and Sen’s trend analyses were applied to the annual temperatures (average, maximum and minimum) and annual total precipitations. ...
Autori: Ayhan Usta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28240

Current landscapes have been intensively modified by humans and forest fragmentation has created substantial increases of forest edges. So far, scale-dependence between observable ecological patterns and the underlying processes affected by forest fragmentation have been widely ignored. To overcome the widespread ambiguity in selecting relevant spatial scales for studying the ecological effects of forest fragmentation, we investigated the effect of forest prevalence and edge length on carbon st...
Autori: Emilia I. Cojoc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28242

As it spread globally, the new SARS-CoV-2 virus was first confirmed in Romania in February 2020, and since then over 40000 cases were diagnosed with COVID-19. Considering climate charges that showed a continuously increasing temperature and also the fact that nowadays air conditioning devices are used on daily bases not only in personal homes but also in healthcare facilities we raised the question if cooling air devices could contribute to the spread of SARS CoV-2 virus. For that, we searched ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28248

Carbendazim (CBZ, methyl 2-benzimidazolecarbamate) is used widely in agriculture against fungal diseases. We aimed to determine the effects of CBZ (0, 0.1, 0.2 and 0.4 mM) on long terminal repeat (LTR) retrotransposon polymorphism and genomic template stability (GTS), DNA damage using Äąnter-simple sequence repeats (ISSR) and inter-retrotransposon amplified polymorphisms (IRAP) marker techniques. Our results showed that all doses of CBZ compose retrotransposition polymorphism. In additional, ou...
Autori: Nalan Yildirim
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28250

In mitigating occupational hazards, there is often a need to use administrative controls such as job rotation over a prolonged period until the hazards can be eliminated or mitigated to safe levels. This research develops a noise-safe job-rotation optimization model that accounts for learning, forgetting, and boredom effects. Our analysis focuses on the case of human-paced and labor-intensive operations, considering the trade-off between safety and productivity. A case of multi-skilled workers ...
Autori: Pavinee Rerkjirattikal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28256

Growth of city population and migration of communities lead to higher accumulation of heavy metals in coastal areas of the Caspian Sea suburbs. In the present study there are represented geographical and ecological locations and environmental monitoring results of the Caspian Sea offshore and coastal area near Akshukyr (Aktau suburbs). The shallow offshore near Aktau city and adjacent areas were monitored in cooperation with the Institute of Ocean Sciences. Sea water analysis carried out specia...
Autori: Nurgul Janaliyeva
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28263

The Jinghui Canal Irrigation District (JCID) is a highly productive agricultural area of Shaanxi province, China. Because of severe water scarcity, implementing water-saving renovation practices for agricultural sustainability is necessary. To determine the influence of different water saving practises on the shallow groundwater system in the JCID, ArcGIS and Processing MODFLOW are used to simulate changes in shallow groundwater in the irrigated farmland in this area. The results show that field...
Autori: Fenggang Dai
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28278

In this paper, we propose innovative solutions for reusing an inactive offshore gas platform and its associated infrastructures as a scientific research hub, where an integrated energy system and innovative environmental monitoring methods are envisaged. To this end, the Azalea A platform, located in the northern Adriatic Sea, is considered a good pilot site. This study analyzes the engineering solutions on Azalea A for the combined production of solar and wind energy coupled with hydrogen produ...
Autori: Ilaria Antoncecchi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28284

The adoption of the Water Safety Plan (WSP) approach, as recommended by the World Health Organization, represents the most effective means to guarantee public health protection and improve drinking water safety. WSP is a risk assessment and management approach applied to all phases of the water supply chain. This study presents the development and implementation of the WSP for the municipality of Florence. The Florence drinking water supply system (DWSS) has two drinking water treatment plants ...
Autori: Roberta Muoio
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28303

A circular economy system will allow company to directly operate an effective re-cycling policy. Establishing a new “zero waste” impact scheme, in order to recover by-products from the production process, thus leading to an increased market price in comparison to their economic value, and by doing so with full respect of the blue and circular economy standards applied to the product. The main objective of the PVC upcycling project is to facilitate the transition of R.ED.EL.’s ...
Autori: Consuelo Nava
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28304

The concentrations of Copper (Cu), cadmium (Cd), manganese (Mn) and lead (Pb) in liver, kidneys and red meat of cattle slaughtered in selected abattoirs in Owerri metropolis, Nigeria were studied using atomic absorption spectroscopy (AAS). This was performed in relation to their concentrations in a forage grass, Panicum maximum randomly harvested from roadsides of Owerri- Onitsha and Owerri-Aba expressways. Results obtained showed that cattle meat samples contained all heavy metals studied. Thei...
Autori: Henry Uzoma Anuforo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28320

In order to study the influence of different rainfall processes on the total pollutant load of non-point sources and pollutant load reduction rate of the low-impact development facilities, this paper took a Low Impact Development (LID) community of Tianfuheyuan, Fengxi new city, Xixian new district in Shaanxi, China as an example, and constructed the storm water management model (SWMM) of the study area. The computed results demonstrate that the storm patterns have obvious effects on the polluta...
Autori: Yu Tong
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28321

Zinc oxide and strontium doped zinc oxide nanoparticles were synthesized through hydrothermal route. The synthesized nanoparticles were characterized by UV, FTIR, SEM, X-Ray diffraction (XRD) and energy dispersive x-ray (EDX) spectroscopic techniques. The optical band gaps were calculated to be 3.16EV and 2.90EV for ZnO and Sr-ZnO nanoparticles, respectively. FTIR confirmed the incorporation of the Sr into ZnO nanoparticles. Average particles size of undoped ZnO and Sr-doped ZnO nanoparticles wa...
Autori: Fazal Akbar Jan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28323

This paper aims to investigate the root characteristics of three woody species (Pinus brutia, Quercus coccifera and Spartium junceum) planted on steep soil-denuded slopes, surfaced after ring-road excavation. The planted slopes were almost vertical, south faced and adding no soil. Fifteen plants per species were manually extracted for root system analysis and testing. The findings showed that the survivorship was different among the investigated species with S. junceum plants to survive better. ...
Autori: Petros Ganatsas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28329

Saline-sodic soil reclamation can be enhanced with a sustainable and environmental approach by using organic waste materials. Moreover, wastewater can be used in leaching processes to protect freshwater resources in regions with water shortages. The aim of this study was to reclaim saline-sodic soil by using recycled wastewater and stabilized sewage sludge together with gypsum. The experiment was designed with three replicates using four different sewage sludge doses (0, 4, 8 and 12 kg m-2), an...
Autori: Almujtaba Hassbalrassol Muhammed Abdallh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28330

Road dust from atmospheric deposition is considered as one of the significant environmental pollutants for containing toxic heavy metals. In this connection, to explore the present scenario of urban contamination and potential health risk of heavy metals present in road dust; this study was carried out in Tangail Municipality Area of Bangladesh. Road dust samples were collected seasonally from five different sampling sites encompassing different traffic homogeneity. Collected samples were proces...
Autori: Mir Talas Mahammad Diganta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28334

Optimal evacuation routes are crucial to protect workers’ safety when accidental leakage of toxic gas occurs in chemical plants. However, the majority of route optimization focuses on the transport field and few on the evacuation routing optimization in chemical plants. This paper proposes a dynamic evacuation routing optimization method for chemical plants under toxic gas release scenarios. From the complete accident scenario set (CASS) built with wind fields and leakage sources, the leak...
Autori: Ying Liu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28336

The application of Species Distribution Models (SDM) in the management of species habitat and environmental impact changes has been widely used by scientists and ecologists globally, however this study proposes a novel analytical technique involving the combination of a statistical ranking algorithm and Remote sensing GIS data (habitat and threat) to analyze the suitability hierarchy of the habitat of a signature water-bird (Larus relictus). The results indicate that about 47.63% of the study re...
Autori: Harrison Odion Ikhumhen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28339

The simple way to deal with obnoxious hexavalent chromium is to reduce it to its trivalent form, which is comparatively less toxic. In this article, Cr(VI) was reduced to Cr(III) using hydrazine. The effect of various process parameters such as molar ratios of Cr(VI) to N2H4, the temperature of the reaction, and the environmental chemistry of solution on the reduction kinetics have been evaluated. Experiments demonstrate an order of three for the reaction. The reaction was first order with resp...
Autori: Bharti Verma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28348