Comparison of advanced oxidation processes and identification of monuron photodegradation products in aqueous solution

被引：34

作者：

Bobu, Maria

Wilson, Steven

Greibrokk, Tyge

Lundanes, Elsa

Siminiceanu, Ilie

机构：

[1] Tech Univ Iasi, Fac Ind Chem, Dept Inorgan Chem, Iasi, Romania

[2] Univ Oslo, Dept Chem, N-0315 Oslo, Norway

来源：

CHEMOSPHERE | 2006年 / 63卷 / 10期

关键词：

photo-Fenton reaction; monuron; mu-LC-MS; mu-LC-UV; TiO2; photocatalysis; chlorophenylurea herbicides;

D O I：

10.1016/j.chemosphere.2005.09.034

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photodegradation of monuron (3-(4-chlorophenyl)-1,1-dimethylurea) in aqueous solutions under simulated solar irradiation has been conducted by different advanced oxidation processes (UV/H2O2, UV/H2O2/Fe2+, UV/H2O2/TiO2, UV/TiO2, dark H2O2/Fe3+). The degradation rates were always higher for the homogeneous catalysis in photo-Fenton reactions (UV/H2O2/Fe2+) compared to the heterogeneous photocatalytic systems (TiO2/UV and UV/H2O2/TiO2). Optimal concentrations of Fe2+ and H2O2 for the abatement of the herbicide in the photo-Fenton system were found to be 1 mM Fe(II) and 10 mM H2O2. Several intermediary products were identified using large volume injection micro-liquid chromatography with UV detection (mu-LC-UV), mu-LC-MS and GC-MS techniques and a degradation mechanism has been proposed. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1718 / 1727

页数：10

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