Reviste: » Environmental Engineering and Management Journal» European Journal of Science and Theology» Sănătate Sport și Nutriție
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Environmentally friendly techniques for chemical pulp bleaching Autori: Adrian Catalin Puitel, Alexandru Botar, Dan Gavrilescu, Gheorghe Dutuc, Grigore CraciunData aparitiei: January 2010 Revista: Environmental Engineering and Management Journal › Vol. 9 › Nr. 1 ISSN: 1843 - 3707 Format PDF Abstract
In the last decades there has been a rapid evolution of techniques for production of bleached pulp. Much of these processes have been environmentally driven. New techniques have been developed in order to replace chlorine-based reagents in producing bleached pulp. Reducing the environmental impact of pulp production can be attain by using non-pollutant bleaching reagents like oxygen and related compounds.
This paper deals with present findings and general trends in environmentally-sound chemical pulp bleaching. Most used environmentally-friendly reactants for pulp bleaching are presented emphasizing their role in a bleaching sequence. Oxygen, hydrogen peroxide, ozone, peracids and polyoxometalates are identified as among the most important reagents that can bleach pulp without affecting the environment. Environmentally-friendly pulp bleaching techniques which include a combination of oxygen, ozone, hydrogen peroxide and other non-chlorine chemicals are presented. Options for mill scale environmentallyfriendly pulp bleaching are included.
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