Comparative study of the degradation of real textile effluents by photocatalytic reactions involving UV/TiO2/H2O2and UV/Fe2+/H2O2 systems

被引：110

作者：

Garcia, J. C. ^{[1
]}

Oliveira, U. ^{[1
]}

Silva, A. E. C. ^{[1
]}

Oliveira, C. C. ^{[1
]}

Nozaki, J. ^{[1
]}

de Souza, N. E. ^{[1
]}

机构：

[1] Univ Estadual Maringa, Dept Quim, BR-87020900 Maringa, Parana, Brazil

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 147卷 / 1-2期

关键词：

textile effluents; titanium dioxide; Fenton reactions; photodegradation; mineralization;

D O I：

10.1016/j.jhazmat.2006.12.053

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This work investigated the treatability of real textile effluents using several systems involving advanced oxidation processes (AOPs) such as UV/H2O2, UV/TiO2, UV/TiO2/H2O2, andUV/Fe2+ /H2O2. The efficiency of each technique was evaluated according to the reduction levels observed in the UV absorbance of the effluents, COD, and organic nitrogen reduction, as well as mineralization as indicated by the formation of ammonium, nitrate, and sulfate ions. The results indicate the association of TiO2 and H2O2 as the most efficient treatment for removing organic pollutants from textile effluents. In spite of their efficiency, Fenton reactions based treatment proved to be slower and exhibited more complicated kinetics than the ones using TiO2, which are pseudo-first-order reactions. Decolorization was fast and effective in all the experiments despite the fact that only H2O2 was used. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：105 / 110

页数：6

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