Experiments in a Pilot Plant (PP) are extremely important and relevant for the substantiation of research. This is the way to set up the most suitable coagulation-flocculation reagents, optimum operating conditions (injection point, reaction times, etc.),compatibility with the processes at the actual Water Works and real possibilities for further improvement.The present work aimed at verifying the previously obtained results in laboratory under PP working conditions for optimizing the coagulatio...
Autori: Adina Pacala, Alina Anghelina, Dalila Marşavina, Ilie Vlaicu, Katalin Bodor, Mihaela Anghel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25156

Contain all the articles from this issueICEEM /02 PLENARY SESSION:"Environmental Engineering and Management in the Context of Sustainable Development"Design for sustainability (D4S): towards advanced product conceptsHan Brezet, Sacha SilvesterICEEM/02 - ENVIRONMENTAL ENGINEERING SECTION"Water and Wastewater Treatment Technologies"Complex approach to the problem of persistent organic pollutants degradation in water environmentVictor Covaliov, Olga Covaliova, Angela Cincilei, Gilles Mailhot, Pasca...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25176

Contain all the articles from this issueICEEM /02 PLENARY SESSION:"Environmental Engineering and Management in the Context of Sustainable Development"Green technology foresight of high technology: Hype of potentials - The challenges from nanotechnology, Biotechnology and ICTMichael S?¸gaard J?¸rgensenIntrinsic properties of noble metals in catalytic selective reduction of NO by propene in lean burn conditionsAnne Giroir-Fendler, Helleh Saadallah, Adela HaletaICEEM/02 - ENVIRONMENTAL ENGINEERING ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25178

â€? Photocatalytic properties of titania - fly ash thin filmsâ€? Study of the viscosity of some biodiesel – diesel oil blendsâ€? Aspects refering to technical and leaching properties of the secondary aluminium slags - cement compositesâ€? Studies regarding phenol and 4-chlorophenol sorption by surfactant modified zeolitesâ€? Cu-Ni nanostructured electrocatalysts obtained by electrocodepositionâ€? Molecularly imprinted poly (vinyl alcohol) films for the selective absorption of glycyrrhizinic ac...
Autori: http://www.ecozone.ro/reviste.php?RID=25373

â€? Photocatalytic properties of titania - fly ash thin filmsâ€? Study of the viscosity of some biodiesel – diesel oil blendsâ€? Aspects refering to technical and leaching properties of the secondary aluminium slags - cement compositesâ€? Studies regarding phenol and 4-chlorophenol sorption by surfactant modified zeolitesâ€? Cu-Ni nanostructured electrocatalysts obtained by electrocodepositionâ€? Molecularly imprinted poly (vinyl alcohol) films for the selective absorption of glycyrrhizinic ac...
Autori: http://www.ecozone.ro/reviste.php?RID=25374

� Physiological changes in seedling germination and growth plant under chemical stress conditions� Studies on sorption and transport processes of cadmium in soils� Assessment of the anthropogenic impact on water systems by fluorescence spectroscopy� Research on the effects of soil improvement by fertilization on the quality of winter wheat� Halotherapy: From ethnoscience to scientific explanations� Study regarding the sorption of erythrosine from aqueous solution onto soil� Hydroxy...
Autori:
ISSN: 1582 - 9596
http://www.ecozone.ro/reviste.php?RID=25375

Abstract The paper presents actual trends concerning the selective collection of the household waste. The collecting methods used in the EU countries and the results obtained by the Romanian municipalities in the last two years are also exposed. The results show thedynamics of household collection and the expectations for the next years. It is known that a town of 100 000 inhabitants collecting 100% of its household recyclable packaging waste could recycle 780 tonnes of steel, 200 tonnes of a...
Autori: Liana Baltes, Camelia Draghici, Camelia Manea, Dan Ceausescu, Mircea Tierean
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25440

Abstract The synergistic combination of polymers and inorganic compounds via sol-gel process has attracted great attention, by manipulating structure at molecular level, for developing new materials with desired properties. These new hybrid materials could have a controllable combination of the benefits of polymers (flexibility, toughness, ease of processing) and those of ceramics or glasses (hardness, durability, thermal stability). The microstructures and the properties of hybrid materials...
Autori: Lucia Dumitrescu, Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25446

Abstract The paper presents the comparative study regarding the turbidity removal using aluminium sulphate Al2(SO4)3*18H2O and polyaluminum chlorides, Aln(OH)mCl3n-m, commercial name, Sachtoklarr 39, in water treatment plant from Covasna City. The parameters that influence the treatment process and the efficiency of turbidity removal were studied. The water characteristic parameters of Basca Mare and Covasna rivers - the two sources of water alimentation for Covasna water treatment plant were...
Autori: Daniela Simina Stefan, Cristina Costache, Viorica Ruxandu, Monica Balas, Mircea Stefan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25462

Abstract Wood has been used as an engineering material because it is low in cost, renewable and strong and it requires low processing energy. Wood has many excellent properties that result from its exceptional combination of microstructural, ultrastructural and molecular features. The main drawback is its dimensional instability in the presence of moisture, which can affects also the biological stability. Wood is susceptible to degradation in a number of ways, including rot or decay, insect a...
Autori: Lucia Dumitrescu, Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25473

Abstract The purpose of this work is to investigate the secondary Al slag (SAS) relating to its technical and environmental properties and, as consequence, to its compatibility with Portland cement matrix. This study may be a contribution to establish of SAS potential valorization as secondary raw material (SRM) in low strength cement matrix composites, as construction products. DRX mineralogical analyses revealed that SAS includes transition alumina compounds, especial boehmite. The hydrati...
Autori: Maria Gheorghe, Nastasia Panait, Romanita Teodorescu, Maria Roman
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25498

Abstract A prehydrolyzed aluminium chloride (PAC), commercial product selected from a previously studied series, and the electrochemically obtained PAC (E-PAC) were tested as coagulants, comparatively with the classical aluminium sulfate (alum). A new method for producing E-PAC has been applied. The level of turbidity, the amount of total organic carbon, the UV-254 absorbance and the residual aluminium were evaluated, for determining the efficiency of the coagulation process in all situations...
Autori: Adina Pacala, Ilie Vlaicu, Ciprian Radovan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25569

? COMPARATIVE CONSIDERATIONS ON THE STRUCTURE OF SOME MOLYBDENUM/NIOBIUM DOUBLE PEROVSKITES OXIDES ? THE INFLUENCE OF THE STORAGE TIME ON THE STABILITY OF BUTTER ? CaCO3 CONTROLLABLE SYNTHESIS BY DOUBLE EXCHANGE METHOD USING CaCl2 RESIDUAL SOLUTIONS ? OPTIMIZATION OF COAGULATION-FLOCCULATION IN THE TREATMENT OF CANAL WATER ? ANODIC DETERMINATION OF PENTACHLOROPHENOL FROM WATER USING CARBON NANOFIBER-BASED COMPOSITE ELECTRODE ? STUDY OF PRECIPITATES GROWTH IN COAGULATION ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25663

An alternative preparation method for PAC (pre-hydrolyzed aluminium chloride with general formula Alm(OH)nCl3n-m) by electrochemical synthesis is presented in this paper. The electrochemically obtained PAC (E-PAC), in which the most effective species of the polymeric Al component were estimated by 27Al RMN method, with properties similar to the properties of a commercially available PAC solution, was successfully generated in a electrochemical reactor. For obtaining as much as Al13 polymer by el...
Autori: Adina Pacala, Ciprian Radovan, Ilie Vlaicu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25901

AbstractIn the last years many papers have reported about the occurrence of the pharmaceuticals in the surface waters and theirundesirable effects upon the aquatic life. Most of pharmaceuticals pass through the wastewater treatment plants unchangedbecause they are biorefractory compounds and as a result they enter the water bodies. Therefore, it is necessary to improve thebiodegradability of pharmaceuticals effluents (PhEs) before their discharge in the sewerage systems. The aim of this paper wa...
Autori: Carmen Lazău, Florica Manea, Monica Ihos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26021

AbstractWater-based printing ink has been used widely and perfectly in printing the packaging of food, drug, and wine products etc.However, due to the need of altering different colors of ink, most water-based printing ink wastewater was generated from theequipment cleaning process. Coagulation combined with Fenton process has been used for this kind of wastewater treatment inthis study, results showed that coagulation using polyaluminium chloride (PACl) as coagulant and ferrous sulfate (FeSO4) ...
Autori: Xiangjuan Ma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26214

AbstractSecondary aluminium production inherently generates significant amounts of slag of variate composition and including dangerous compounds. Consequently, a care treatment of the resulted slag is imperatively necessary for preventing the environment pollution and for recovering valuable materials even if present in low amounts. The aluminium recovering procedure is based on a chemical and hydrometallurgical slag treatment, leading to the technical grade aluminium sulphate (AS), possible to ...
Autori: Carmen Tociu, Cristina Maria, Elena Diacu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26295

AbstractThe aim of the current study is to analyse the effects of reusing the abrasive material, in different rates, on the quality of surfacesprocessed by abrasive water jet cutting (AWJ) and to correlate it with the environmental impact. In view of this, two aluminiumalloys are processed, Al 2024 T3 and Al 6065 T651, respectively, with large applicability in the aeronautic and machine buildingindustries. It was found that for reusing rates of the abrasive material higher than 60%, a better qua...
Autori: Carol Schnakovszky
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26438

AbstractAmong foods that possess potent medicinal properties, Cucurbitaceae seeds stand as a promising source, since they are assumedto have a protective effect against oxidative stress. In order to analyze the antioxidant compounds of the seeds of Citrulluslanatus, Lagenaria siceraria, Telfaria occidentalis, Cucurbita maxima, Cucumis sativus, Cucumeropsis mannii, and Cucurbitamoschata, the dried seeds were extracted in MeOH-H2O (50 %; v/v) mixture at constant mixing rate. Qualitative phytochemi...
Autori: Aristide Guillaume Silapeux Kamda
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26440

Abstract The performance of electrocoagulation (EC) process, a non-specific electrochemical technology, was investigated for the removal of carbamazepine (CBZ), an antiepileptic drug, from water. Experiments were carried out in synthetic wastewater in a batch cell. The respective influences of some key process parameters were studied, such as mixing conditions, initial pH, and current on aluminium electrodes. Experimental results showed that a CBZ removal efficiency of 62% was observed under...
Autori: Tania Yehya
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26683

Abstract In this study, the electrocoagulation process using aluminium anodes was tested as alternative for coagulation process for the drinking water treatment using two types of real groundwater sources, characterized by low turbidity, moderate and high organic load, and nitrite and ammonium species for one of them. The optimum operating conditions determined to be pH 6.5, current density (i) 25A/m2 at 30 min resulted in removal efficiency of over 70 % for total organic carbon (TOC) parame...
Autori: Anamaria Baciu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26756

Abstract Recently several innovative suggestions on how industrial wastes can be utilised in new products have been presented in literature, e.g. as filler or additives in concrete, incorporated in ceramic materials to produce glass-ceramics and pavement construction. In this work, metallurgical materials from secondary aluminium scrap processing and glass waste derived from treatments of packaging and fluorescent lamps were considered for fabrication of new ceramic materials using powder te...
Autori: Rosa Taurino
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26794

Conductive-diamond electrochemical oxidation processes are promising technologies for treating biorefractory industrial wastes with organic loads below 20000 mg L-1. In this work, electrochemical oxidation of a real industrial pharmaceutical wastewater with conductive-diamond anodes has been studied. The electrolyses were carried out in discontinuous operation mode under galvanostatic conditions, using a bench-scale plant equipped with a single compartment electrochemical flow cell. For optim...
Autori: Joaquín Ramón Domínguez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26927

This study presents the results obtained in tailoring thin films of alumina, deposited onto aluminium substrates by spray pyrolysis, at 250°C, using AlCl3 solutions (0.15M) in a water:ethanol (1:1) solvent mixture. As morphology controlling agents, acetylacetone and maleic acid based copolymers are added in the precursors’ solutions. The precursors’ systems are analyzed by FTIR spectroscopy and the surface morphology of alumina thin films is investigated by atomic force microscop...
Autori: Luminita Isac
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27291

Arsenic removal from groundwater as drinking water source was investigated using electrocoagulation (EC) process with horizontal anodes of iron plate under galvanostatic regime. The current density of 5 A·m-2 was determined as the optimum operating conditions at the electrolysis time of maximum 25 minutes and pH ranged between 6.5 to 8.5, by which the arsenic concentration was reduced below 10 μg·L-1. The aspects related to the arsenic removal mechanism were discussed by Zeta...
Autori: Aniela Pop
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27327

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

In the present work, the removal of anionic phosphate from aqueous solution by electrocoagulation (EC) process using aluminium electrodes was carried out. Batch studies were carried out to investigate the influence of different operating parameters (supporting electrolyte concentration, pH, spacing between electrodes, applied voltage, electrode area, and initial concentration of phosphate) on removal of phosphate from aqueous solution. The initial value of pH was varied from 3 to 8, while the co...
Autori: Sarasan Seena Mithra
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27458

Recycling of battery components for natural resources sustainability and consumer products has become an important endeavor that demands continuity through effective processes. In compliance with the need for waste management, LiMn1/3Ni1/3Co1/3O2 in the positive electrode of spent lithium-ion batteries has been recovered using specially designed device, consisting of two compartments separated with a plastic sieve of pore size 0.2mm. The upper compartment equipped with a mechanical stirrer conta...
Autori: Oluwatosin Emmanuel Bankolehttp://www.ecozone.ro/reviste.php?RID=27581

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

The objective of the present study was to (i) compare different treatment options for greywater (GW) reuse, (ii) assess the potential of treated GW for reuse, and (iii) select the optimal treatment option by using Analytic Hierarchy Process (AHP). Raw GW was settled for 2 h. Five different treatment options were investigated simultaneously in parallel using the same influent (settled GW). The treatment options were (1) sand filtration, (2) sand/brick bat filtration, (3) alum coagulation/floc...
Autori: Dilip Machindra Ghaitidak
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27669

The aim of this study is the treatment of liquid effluents from a petroleum industry (NAFTAL /Algeria) by an electrochemical treatment process (electrocoagulation). The electrocoagulation has proved to be useful for the treatment of wastewater, but in order to enhance its ecological characteristic we found it would be essential to carry out our experiments with ecological energy derived from a photovoltaic solar module, which would contribute to sustainability objectives. The electrocoagulation ...
Autori: Kahina Ighilahriz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27679

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

Sodium silicate, iron sulfate, magnesium sulfate, and zinc sulfate were used as the raw materials to prepare a new inorganic polymer flocculant, polysilicate ferric magnesium zinc (PSFMZ), using direct recombination. The effects of molar ratio of zinc to silicon, ratio of iron to magnesium, reaction temperature, and reaction time on deoiling rate were explored. The optimal synthesis conditions for the flocculant for the thermal-washing treatment of oily sludge were determined. Results showed tha...
Autori: Lanlan Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28165

Impregnation of aluminium ion onto silica gel (SG) surface (Al/SG) is to increase the adsorption capacity of an anionic dye such as Indigo carmine (IC). The impregnation was carried out using wetness impregnation. The change of the functional group was evaluated by FTIR, crystallinity was determined using XRD, surface morphology were studied by SEM-EDX, while surface area and pore size using N2 gas adsorption-desorption analyzer. Meanwhile, the best of IC adsorption condition onto SG and Al/SG ...
Autori: Yudi Aris Sulistiyo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28253