PHOTODEGRADATION OF LAMBDA-CYHALOTHRIN AND CYPERMETHRIN IN AQUEOUS SOLUTION AS AFFECTED BY HUMIC ACID AND/OR COPPER: INTERMEDIATES AND DEGRADATION PATHWAYS

被引：24
|
作者：
Xie, Jimin [1 ]
Wang, Pingli [1 ]
Liu, Jun [2 ]
Lv, Xiaomeng [1 ]
Jiang, Deli [1 ]
Sun, Cheng [3 ]
机构：
[1] Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang, Peoples R China
[2] Jiangsu Univ, Sch Environm, Zhenjiang, Peoples R China
[3] Nanjing Univ, State Key Lab Pollut Control & Resource Reuse, Nanjing 210008, Peoples R China
来源：
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY | 2011年 / 30卷 / 11期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Lambda-cyhalothrin; Cypermethrin; Copper; Humic acids; Photodegradation; ORGANOPHOSPHORUS PESTICIDES; ATRAZINE; DELTAMETHRIN; PRODUCTS; OXYGEN; RATES; IRON; PH;
D O I：
10.1002/etc.655
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The influence of coexisting humic acids (HA) or Cu2+ on the photodegradation of pesticides lambda-cyhalothrin (lambda-CHT) and cypermethrin (CPM) in aqueous solution was studied under xenon lamp irradiation. The removal efficiency of pesticides lambda-CHT and CPM were enhanced in the presence of either Cu2+ or HA but restrained in the presence of both Cu2+ and HA. The photodegradation of lambda-CHT and CPM followed first-order reaction kinetics. The photodegradation intermediates of lambda-CHT and CPM were determined using gas chromatography/mass spectrometry. Possible photodegradation pathways included decarboxylation, ester bond cleavage, dechlorination, and phenyl group removal. Environ. Toxicol. Chem. 2011; 30: 2440-2448. (C) 2011 SETAC
引用
收藏
页码：2440 / 2448
页数：9
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