期刊
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
卷 30, 期 11, 页码 2440-2448出版社
WILEY
DOI: 10.1002/etc.655
关键词
Lambda-cyhalothrin; Cypermethrin; Copper; Humic acids; Photodegradation
资金
- National Natural Science Foundation of China [21003065]
- China Postdoctoral Science Foundation [20090461068]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1001021B]
- Scientific Research Foundation for Talented Scholars of Jiangsu University [10JDG039]
- State Key Laboratory of Soil and Sustainable Agriculture, Chinese Academy of Sciences [Y052010043]
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
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