Historical Trends and Chiral Signatures of Organochlorine Pesticides in Sediments of Qiandao Lake, China

Historical Trends and Chiral Signatures of Organochlorine Pesticides in Sediments of Qiandao... This study investigated the enantiomeric and depth profiles of organochlorine pesticides (OCPs) accumulated in the sediments of Qiandao Lake, China. OCP concentrations in sediments have increased gradually since the early 1960s, when extensive OCPs application in China began. Concentrations reached maximum levels after 1992, this timing corresponds with the emerging of the “new” usage of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethane (DDTs). In addition, the degradation of chiral OCPs were enantioselective, resulting in enriched (−)-enantiomers for α-HCH and o, p’-DDD. However, both preferential depletions of (−) enantiomers and (+) enantiomers were observed for o, p’-DDT. This outcome was indicated by enantiomer fractions (EF) values either greater or less than 0.5. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of Environmental Contamination and Toxicology Springer Journals

Historical Trends and Chiral Signatures of Organochlorine Pesticides in Sediments of Qiandao Lake, China

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC
Subject
Environment; Pollution, general; Environmental Health; Ecotoxicology; Soil Science & Conservation; Environmental Chemistry; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution
ISSN
0007-4861
eISSN
1432-0800
D.O.I.
10.1007/s00128-017-2131-5
Publisher site
See Article on Publisher Site

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