Degradation of a four-pesticide mixture by combined photo-Fenton and biological oxidation

被引：124

作者：

Ballesteros Martin, M. M. ^{[1
]}

Sanchez Perez, J. A. ^{[1
]}

Casas Lopez, J. L.

Oller, I. ^{[2
]}

Malato Rodriguez, S. ^{[2
]}

机构：

[1] Univ Almeria, Dept Ingn Quim, Almeria 04120, Spain

[2] Plataforma Solar Almeria CIEMAT, Tabernas 04200, Almeria, Spain

来源：

WATER RESEARCH | 2009年 / 43卷 / 03期

关键词：

Advanced Oxidation Processes; Solar photocatalysis; Pesticides; Photo-Fenton; Biological treatment; Activated sludge; WATER-SOLUBLE PESTICIDES; SEQUENCING BATCH REACTOR; WASTE-WATER; PHOTOCATALYTIC DEGRADATION; PLANT; BIODEGRADATION; REMOVAL; REAGENT; DIURON; TIO2;

D O I：

10.1016/j.watres.2008.11.020

中图分类号：

X [环境科学、安全科学];

学科分类号：

083001 [环境科学];

摘要：

Complete degradation of a pesticide mixture by a combination of a photo-Fenton pretreatment and an activated-sludge batch reactor is demonstrated. Four commercial pesticides, Laition, Metasystox, Sevnol and Ultracid were chosen for this experiment, The active ingredients are, respectively, dimethoate, oxydemeton-methyl, carbaryl and methidathion. The original pesticide concentration was 200 mg L (1). Biotreatment began after 31% photocatalytic mineralization, which after 5 h in a 6-L stirred batch-mode tank reactor with non-acclimated activated sludge, leaves the photo-Fenton effluent completely degraded. This biotreatment time is shorter than commonly found in municipal waste-water treatment plants (similar to 8-10 h). Therefore, the combined process is effective for rapid pesticide degradation in wastewater with complete removal of parent compounds and the associated DOC concentration. Nonetheless, assessment of this technology should take into account higher pesticide concentrations and how this factor affects both the photocatalytic and the biological oxidation. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：653 / 660

页数：8

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