Photocatalytic removal of fenitrothion in pure and natural waters by photo-Fenton reaction

被引：73

作者：

Derbalah, AS ^{[1
]}

Nakatani, N ^{[1
]}

Sakugawa, H ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Biosphere Sci, Higashihiroshima 7398521, Japan

来源：

CHEMOSPHERE | 2004年 / 57卷 / 07期

关键词：

pesticides; photo-fenton reaction; contaminated water; iron; hydrogen peroxide; hydroxyl radical;

D O I：

10.1016/j.chemosphere.2004.08.025

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photocatalytic removal kinetics of fenitrothion at a concentration of 0.5mg l(-1) in pure and natural waters were investigated in Fe(III)/H2O2/UV-Vis, Fe(III)/UV-Vis and H2O2/UV-Vis oxidation systems, with respect to decreases in fenitrothion concentrations with irradiation time using a solar simulator. Fenitrothion concentrations were determined by HPLC analysis. Furthermore, total mineralization of fenitrothion in these systems was evaluated by monitoring the decreases in DOC concentrations with solar simulator irradiation time by TOC analysis. It was shown that the degradation rate of fenitrothion was much faster in the Fe(III)/H2O2/UV-Vis system than the Fe(III)/UV-Vis and H2O2/UV-Vis systems in both pure and river waters. Consequently, the mineralization rate of fenitrothion was much faster in the Fe(III)/H2O2/UV-Vis system than in the other two systems. The high (OH)-O-. generation rate measured in the Fe(III)/H2O2/UV-Vis system was the key to faster degradation of fenitrothion. Increases in the concentrations of H2O2 and Fe led to better final degradation of fenitrothion. These results suggest that the photo-Fenton reaction (Fe(III)/H2O2/UV-Vis) system is likely to be an effective method for removing fenitrothion from contaminated natural waters. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：635 / 644

页数：10

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