Enantioselective Degradation of Metalaxyl in Anaerobic Activated Sewage Sludge

被引：42

作者：

Chen, Shengwen ^{[2
]}

Liu, Weiping ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Biol & Environm Engn, Res Ctr Environm Sci, Hangzhou 310032, Zhejiang, Peoples R China

[2] Shanghai Second Polytech Univ, Sch Urban Dev & Environm Engn, Shanghai 201209, Peoples R China

来源：

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY | 2009年 / 82卷 / 03期

关键词：

Metalaxyl; Chiral pesticides; Enantioselective separation; Biodegradation; ENVIRONMENTAL BEHAVIOR; AQUATIC TOXICITY; SOIL; INSECTICIDES; ENANTIOMERS; POLLUTANTS;

D O I：

10.1007/s00128-008-9559-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

083001 [环境科学];

摘要：

Enantioselective degradation occurs frequently for chiral pesticides in field matrices and under laboratory conditions. Metalaxyl is a chiral compound and important fungicide. In this study, the degradation of Rac- and R-metalaxyl under anaerobic conditions was studied. The degradation processes were found to follow first-order kinetics. The degradation of the S-enantiomer (T (1/2) = 2.10 days) was much faster than the R-enantiomer (T (1/2) = 8.44 days). The half-life of the Rac-metalaxyl mixture was 4.05 days, which was higher than the S-enantiomer, but lower than the R-enantiomer. These results confirm the need for emphasizing the importance of examining the fate of the stereoisomers in an environmental system.

引用

页码：327 / 331

页数：5

共 14 条

[1]

Enantioselective degradation of metalaxyl in soils:: Chiral preference changes with soil pH [J].