期刊
ENVIRONMENTAL MONITORING AND ASSESSMENT
卷 184, 期 12, 页码 7383-7393出版社
SPRINGER
DOI: 10.1007/s10661-011-2507-7
关键词
P-NMR; Organophosphorus pesticides; Metal ions; Degradation
The degradation of some organophosphorus pesticides (OPPs) in the presence of metal ions was studied by P-31-NMR spectroscopy. Both P-31-NMR and gas chromatography/mass spectroscopy results were used in order to determine the nature of metabolites formed after degradation. The degraded organophosphorus pesticide were investigated for chlorpyrifos and phoxim in the presence of several metal ions including Hg2+, Cu2+, Cd2+, Ni2+, Pb2+, and Ag+. P-31-NMR results indicated Ag+ and Hg2+ ion promoted degradation of OPPs and other metal ions formed complex with OPPs and cannot degrade OPPs. We found that the degradation of chlorpyrifos and phoxim with Ag+ or Hg2+ led to the formation of O,O-diethyl-O-methyl phosphorothionate, (C2H5O)(2)(CH3O)PS, at metal ion/pesticide mole ratios <= 1.0 and completely decomposed at a higher mole ratio of 10. Finally, the method was successfully applied to the degradation study of a number of technical and formulated pesticides in the presence of Ag+ ion at a metal ion/pesticide mole ratio of 10.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据