Current status and historical variations of DDT-related contaminants in the sediments of Lake Chaohu in China and their influencing factors

The temporal-spatial distributions of DDT-related contaminants (DDXs), including DDT (dichlorodiphenyltrichloroethane), DDE (dichlorodiphenyldichloroethylene) and DDD (dichlorodiphenyldichloroethane), in the sediments of Lake Chaohu and their influencing factors were studied. p,p-DDE and p,p-DDD wer...

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Bibliographic Details
Published in:Environmental pollution (1987) 2016-12, Vol.219, p.883-896
Main Authors: Kang, Lei, He, Qi-Shuang, He, Wei, Kong, Xiang-Zhen, Liu, Wen-Xiu, Wu, Wen-Jing, Li, Yi-Long, Lan, Xin-Yu, Xu, Fu-Liu
Format: Article
Language:English
Subjects:
Algal bloom
China
DDT - analogs & derivatives
DDT - analysis
DDXs
Environmental Monitoring
Eutrophication
Geologic Sediments - chemistry
Hydrocarbons, Chlorinated - analysis
Influencing factors
Lake Chaohu
Lakes - chemistry
Sediment
Source apportionment
Temporal-spatial distribution
Water Pollutants, Chemical - analysis
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Summary:The temporal-spatial distributions of DDT-related contaminants (DDXs), including DDT (dichlorodiphenyltrichloroethane), DDE (dichlorodiphenyldichloroethylene) and DDD (dichlorodiphenyldichloroethane), in the sediments of Lake Chaohu and their influencing factors were studied. p,p-DDE and p,p-DDD were found to be the two dominant components of DDXs in both surface and core sediments. The parent DDT compounds were still detectable in sediment cores after the late 1930s. Historical usage of technical DDT was identified as the primary source of DDXs in sediments, as indicated by DDT/(DDD + DDE) ratios of less than one. The residual levels of DDXs were higher in the surface and core sediments in the western lake area than in other lake areas, which might be due to the combined inflow effects of municipal sewage, industrial wastewater and agricultural runoff. The DDX residues in the sediment cores reached peak values in the late 1970s or early 1980s. There were significant positive relationships between DDX residues in sediment cores with annual DDT production and with fine particulate sizes (
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2016.08.072