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Type: Artigo de periódico
Title: Photoassisted electrochemical degradation of organic pollutants on a DSA type oxide electrode: Process test for a phenol synthetic solution and its application for the E1 bleach kraft mill effluent
Author: Pelegrini, RT
Freire, RS
Duran, N
Bertazzoli, R
Abstract: In this paper, the performance of a photoassisted electrolysis process, for the degradation of organic pollutants, is investigated. Results obtained in this work have shown that the thermally prepared anode of titanium, coated with 70TiO(2)/30RuO(2), exhibits photoactivity and may be used for the treatment of effluents. A synthetic phenol aqueous solution and a real paper mill industry effluent were treated. Kinetic analysis showed a synergetic effect of electrolysis and photocatalysis and degradation rates are an order of magnitude greater than the sum of the results reached by using both processes individually. Using a 125 W mercury bulb and 20 mA cm(-2), the phenol concentration decayed 85% in 90 min and 70% reduction of TOC was obtained. In the application of the treatment process for the degradation of the El bleach Kraft mill effluent, total phenols were practically eliminated in a short period of processing time, and color, usually resistant to biological treatment, was reduced to 10% from its initial value measured in terms of absorbance. Reductions of AOX, GOD, and BOD by 25%, 30%, and 35%, respectively, were also observed.
Country: EUA
Editor: Amer Chemical Soc
Citation: Environmental Science & Technology. Amer Chemical Soc, v. 35, n. 13, n. 2849, n. 2853, 2001.
Rights: fechado
Identifier DOI: 10.1021/es001784j
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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