Spatial variability and temporal trends of HCH and DDT in soils around Beijing Guanting Reservoir,China |
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| Authors: | Wenyou Hu Yonglong Lu Tieyu Wang Wei Luo Yajuan Shi John P Giesy Jing Geng Wentao Jiao Guang Wang Chunli Chen |
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| Institution: | (1) State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 100085 Beijing, China;(2) Graduate School of Chinese Academy of Sciences, 100039 Beijing, China;(3) Department of Veterinary Biomedical Sciences & Toxicology Center, University of Saskatchewan, Saskatoon, SK, Canada;(4) Department of Zoology, Center for Integrative Toxicology, Michigan State University, East Lansing, MI 48824, USA; |
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| Abstract: | Spatial variability and temporal trends in concentrations of the organochlorine pesticides (OCPs), hexachlorocyclohexane (HCH)
and dichlorodiphenyltrichloroethane (DDT), in surface soils around Beijing Guanting Reservoir (GTR) were studied in 2003 and
2007. Concentrations of the two OCPs in soils around GTR were generally less than reference values set by the Chinese government
for the protection of agricultural production and human health. Among the OCPs, β-HCH and p, p′-DDE were the two predominant compounds. This result indicates that the HCH and DDT residues in soils were primarily from
historical use. Based on kriging, a spatial distribution of HCH and DDT around the GTR was observed. Spatial variability indicated
how HCH and DDT had been applied and been distributed in the past. Between 2003 and 2007, concentrations of HCH and DDT decreased
more rapidly in orchard soils than those in fallow soils. |
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