Study on the distribution and sources of organochlorine pesticide in epikarst soil

SUN Yu-chuan; SHANG Ying-nan; MAO Hai-hong; FU Yun; SHEN Li-cheng

doi:10.3969/j.issn.1001-4810.2012.01.005

Volume 31 Issue 1

Mar. 2012

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SUN Yu-chuan, SHANG Ying-nan, MAO Hai-hong, FU Yun, SHEN Li-cheng. Study on the distribution and sources of organochlorine pesticide in epikarst soil[J]. CARSOLOGICA SINICA, 2012, 31(1): 23-30. doi: 10.3969/j.issn.1001-4810.2012.01.005

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SUN Yu-chuan, SHANG Ying-nan, MAO Hai-hong, FU Yun, SHEN Li-cheng. Study on the distribution and sources of organochlorine pesticide in epikarst soil[J]. CARSOLOGICA SINICA, 2012, 31(1): 23-30. doi: 10.3969/j.issn.1001-4810.2012.01.005

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Study on the distribution and sources of organochlorine pesticide in epikarst soil

doi: 10.3969/j.issn.1001-4810.2012.01.005

1.
School of Geographical Sciences, Southwest University / Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education
2.
Chengdu Academy of Environmental Sciences

Received Date: 2011-09-20
Publish Date: 2012-03-25

Abstract

Abstract

In order to study the distribution tendency, composition character and main possible sources of organochlorine pesticides (OCPs) in the epikarst soils, the concentrations of OCPs residues in the overlaying soils of four typical epikarst springs are measured by gas chromatography equipped with miro-63Ni electron capture detector. The four epikarst springs, SF Spring, HG Spring, BSW Spring and LH Spring, situate in Nanchuan District, Chongqing City. The results show that the total OCPs concentrations in the epikarst soils range from 7.13 to 323.37 ng/g, and all 17 OCPs are detected in HG,BSW and LH soils, and except for p, p'-DDD, the other are all detected in SF soil, but the concentrations of different O CPs vary greatly. According to the measured concentration, HCHs, DDTs, CHLs and mirex are the most dominant compounds among the 17 OCPs. The composition of H C H indicates HCHs in epikarst soil originating from the residues of historical application of technical HCHs and lindane, and under the influence of environment, the compositions of HCH isomer change greatly. DDTs in soils of BS W and SF soils come from the use of technical DDT and dicofol, and the use of technical DDT might be responsible for the freshly DDT input in HG spring and LH soils, but not the dicofol type DDT. In comparison with soil quality standards of China and the Netherlands, the concentration of DDTs in BS W soil is near to the reference value of unpolluted soil according to soil protection guideline of the Netherlands, and the levels of DDTs in L H soil are classified as low polluted, but the levels of DDTs and CHLs in HG soil is categorized as high polluted, while the SF soil can be classed as unpolluted one.
- organochlorine pesticides,
- epikarst,
- soil,
- composition character,
- source recognition

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References(31)

References

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Study on the distribution and sources of organochlorine pesticide in epikarst soil

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