Sediments contamination levels of organochlorine pesticides in Weihe River, Northwestern China

The residual levels of hexachlorocyclohexanes (HCHs), chlordane (CHL), and dichlorodiphenyl trichloroethanes (DDTs) in surficial sediments at 18 sites along 6 typical monitoring sections of the Weihe River, in Northwestern China were investigated. The concentration ranges were 0.087–0.61 ng g −1 for...

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Bibliographic Details
Published inEnvironmental earth sciences Vol. 75; no. 9; p. 1
Main Authors Wei, Hong, Hu, Da, Li, Ke-bin
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2016
Springer Nature B.V
Subjects
Average flow
Biogeosciences
Chlordane
Contaminated sediments
Degradation products
Earth and Environmental Science
Earth Sciences
Environmental Science and Engineering
Fluvial sediments
Geochemistry
Geology
Hydrology/Water Resources
Insecticides
Land degradation
Lindane
Molecules
Organic compounds
Organochlorine pesticides
Original Article
Pesticides
River basins
Rivers
Sediment pollution
Sediments
Terrestrial Pollution
China
Weihe River
DDTs
OCPs
Sediments
HCHs
Weihe River
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Summary:The residual levels of hexachlorocyclohexanes (HCHs), chlordane (CHL), and dichlorodiphenyl trichloroethanes (DDTs) in surficial sediments at 18 sites along 6 typical monitoring sections of the Weihe River, in Northwestern China were investigated. The concentration ranges were 0.087–0.61 ng g −1 for HCHs, 0.10–0.28 ng g −1 for CHL, and 0.030–0.10 ng g −1 for DDTs, respectively. Molecular markers (the concentration ratios of OCPs to their degradation products and the relative contents of the different components of OCPs) suggested that lindane-type HCHs might have been used in or around the Weihe River basin, and there still exists a new pollutant input. DDTs in the Weihe River sediments came from both industrial DDT and dicofol; the industrial DDT made the greatest contribution to total DDTs. The OCPs concentration was negatively correlated with the logarithmic value of annual average flow volume along the six sections, over the years 2006–2009. The potential ecological risk arising from the presence of OCPs was minimal, but their potential harm to human health cannot be ignored due to their accumulative effect through the food chain.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-016-5615-4