Heterogeneous Photocatalytic Degradation of Dairy Wastewater Using Immobilized ZnOReportar como inadecuado




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ISRN Chemical EngineeringVolume 2012 2012, Article ID 275371, 8 pages

Research ArticleDepartment of Chemical Engineering, Engineering School of Lorena, University of São Paulo USP, Estrada Municipal do Campinho, s-n°, Bairro do Campinho, 12600-000 Lorena, SP, Brazil

Received 4 June 2012; Accepted 16 July 2012

Academic Editors: M. A. Oturan and I. Poulios

Copyright © 2012 Gisella R. Lamas Samanamud et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This work evaluated the efficiency and systemic application of heterogeneous photocatalytic degradation for dairy wastewater under advanced oxidation process AOP utilizing solar radiation and immobilized ZnO as measured by total organic carbon TOC. The AOP system consisted of a semibatch reactor and glass tank operated with an initial volume of 3 L of dairy wastewater. ZnO was immobilized on a metal plate of 800×250 mm and used as a catalyst bed. Evaporation rate was considered when effective degradation of the photocatalytic system was determined. The AOP utilized Taguchi’s L8 orthogonal array. The entry variables were pH, reaction time, initial organic load in the effluent, and ZnO coating thickness on the catalyst bed. When optimized, an effective TOC degradation of 14.23% was obtained under variable values of pH 8.0, a metal-plate coating of 100 micrometers μm ZnO, and total reaction time of 180 min.





Autor: Gisella R. Lamas Samanamud, Carla C. A. Loures, Andre L. Souza, Rodrigo F. S. Salazar, Ivy S. Oliveira, Messias B. Silva, an

Fuente: https://www.hindawi.com/



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