Electrochemical degradation of humic acid

被引：76

作者：

Motheo, AJ

Pinhedo, L

机构：

[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

[2] Univ Fed Mato Grosso, Dept Elect Engn, Fac Tecnol & Engn, Cuiaba, Mato Grosso, Brazil

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2000年 / 256卷 / 01期

关键词：

humic acid; electro-oxidation; DSA electrodes; water treatment;

D O I：

10.1016/S0048-9697(00)00469-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The treatment of natural water for drinking water production goes through the degradation of humic substances. In this study, humic acid, extracted from a peat area located at the margins of the Mogi Guacu River at Sao Paulo State, Brazil, was used to perform electro-oxidation essays in order to evaluate the possibilities of electrochemical methods in the degradation of humic substances. The working electrodes were dimensionally stable anodes (DSA) type with the following compositions: Ti/Ir0.3Ti0.7O2; Ti/Ru0.3Ti0.7O2; and Ti/Ir0.2Ru0.2Ti0.6O2. The electrolyses were performed by using a solution composed of an electrolyte support (0.1 mol l(-1) KCl) and 30 mg l(-1) of the humic acid. Samples were taken during the electrolyses and analysed by the pH, transmittance, UV-vis spectra and chromatography. The results show that the Ti/Ru0.3Ti0.7O2, electrode presents the best performance considering the elimination of most of the electro-oxidation products after approximately 2 h of electrolysis at 40 mA cm(-2). (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：67 / 76

页数：10

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