Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/55630
Type: Artigo de periódico
Title: Biomass photochemistry-XXII: Combined photochemical and biological process for treatment of Kraft E1 effluent
Author: Reyes, J
Dezotti, M
Mansilla, H
Villasenor, J
Esposito, E
Duran, N
Abstract: The photocatalytic conditions for decontamination of Kraft effluents from Eucalyptus grandis (Brazil) and Pinus radiata (Chile) were studied. Irradiation in the presence of ZnO was similar for E. grandis and P. radiata effluents reaching a total decolorization after 2 h. This correlates with the mineralization process. When ZnO was immobilized on sand a two-fold faster decolorization was observed after 30 min of irradiation. The combined photochemical-biobleaching process was effective in the decolorization of Eucalyptus Kraft El effluent. By applying a short time of irradiation (10 min) the time necessary for 50% of biological colour reduction was decreased to half. The contribution of the photochemical process when applied as a posttreatment was least evident. In this case additional reduction of about 10% on the AOX content and almost completion of the decolorization process was observed for Pinus Kraft El effluent. Photochemistry applied to pulp and paper industry appeared as an important technique to remediate pollution problems. (C) 1998 Elsevier Science B.V.
Subject: photocatalysis
Kraft effluent
ZnO
immobilization
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/S0926-3373(98)80000-3
Date Issue: 1998
Appears in Collections:Unicamp - Artigos e Outros Documentos

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