Removal of methyl parathion from water by electrochemically generated Fenton's reagent

被引：183

作者：

Diagne, Mababa ^{[1
]}

Oturan, Nihal ^{[1
]}

Oturan, Mehmet A. ^{[1
]}

机构：

[1] Univ Marne la Vallee, Lab Geomat & Geol Ingn, F-77454 Marne La Vallee 2, France

来源：

CHEMOSPHERE | 2007年 / 66卷 / 05期

关键词：

advanced oxidation process; electro-Fenton process; mineralization; methyl parathion; degradation pathway;

D O I：

10.1016/j.chemosphere.2006.06.033

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The electro-Fenton process was used to assess the degradation of methyl parathion (MP) in aqueous solutions. This oxidation process allows the production of hydroxyls radicals which react on the organic compounds, leading to their mineralization. Degradation experiments were performed either in perchloric, sulphuric, hydrochloric and nitric acid media under current controlled electrolysis conditions at different pH. The pH effect as well as the nature of the medium (i.e., the nature of the ions present in medium) on the degradation and mineralization efficiency were studied. The mineralization of the initial pollutant was investigated by total organic carbon measurements which show a complete mineralization at pH 3 in perchloric medium. The absolute rate constant of MP hydroxylation reaction was determined as (4.20 +/- 0.11) x 10(9) M-1 s(-1). Complete degradation of NIP and its metabolites occur in less than 45 min. Degradation reaction intermediates such as aromatic compounds, carboxylic acids and inorganic ions were identified and a mineralization pathway is proposed. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：841 / 848

页数：8

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