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Open Access Green as soon as Postprint is submitted to ZB.
Organochlorine pesticides in soils under different land usage in the Taihu Lake region, China.
J. Environ. Sci. 19, 584-590 (2007)
A field study was conducted in the Taihu Lake region, China in 2004 to reveal the organochlorine pesticide concentrations in soils after the ban of these substances in the year 1983. Thirteen organochlorine pesticides (OCPs) were analyzed in soils from paddy field, tree land and fallow land. Total organochlorine pesticide residues were higher in agricultural soils than in uncultivated fallow land soils. Among all the pesticides, PDDX (DDD, DDE and DDT) had the highest concentration for all the soil samples, ranging from 3.10 ng/g to 166.55 ng/g with a mean value of 57.04 ng/g and followed by PHCH, ranging from 0.73 ng/g to 60.97 ng/g with a mean value of 24.06 ng/g. Dieldrin, endrin, HCB and -endosulfan were also found in soils with less than 15 ng/g. Ratios of p,p0-(DDD+DDE)/DDT in soils under three land usages were: paddy field > tree land > fallow land, indicating that land usage inlfuenced the degradation of DDT in soils. Ratios of p,p0-(DDD+DDE)/DDT>1, showing aged residues of DDTs in soils of the Taihu Lake region. The results were discussed with data from a former study that showed very low actual concentrations of HCH and DDT in soils in the Taihu Lake region, but according to the chemical half-lives and their concentrations in soils in 1980s, the concentration of DDT in soils seemed to be underestimated. In any case our data show that the ban on the use of HCH and DDT resulted in a tremendous reduction of these pesticide residues in soils, but there are still high amounts of pesticide residues in soils, which need more remediation processes.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
DDT; HCH; land-use; pesticide residue; degradation
ISSN (print) / ISBN
1001-0742
e-ISSN
1878-7320
Quellenangaben
Volume: 19,
Issue: 5,
Pages: 584-590
Publisher
IOS Press
Publishing Place
[Amsterdam]; Beijing
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Soil Ecology (IBOE)