Distribution of organichlorine pesticide in the water and sediment of the Bailang Subterranean Stream in Guangxi

KONG Xiang-sheng; QI Shi-hua; Oramah I T; ZHANG Yuan; HUANG Bao-jian

doi:10.3969/j.issn.1001-4810.2010.04.003

Volume 29 Issue 4

Dec. 2010

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KONG Xiang-sheng, QI Shi-hua, Oramah I T, ZHANG Yuan, HUANG Bao-jian. Distribution of organichlorine pesticide in the water and sediment of the Bailang Subterranean Stream in Guangxi[J]. CARSOLOGICA SINICA, 2010, 29(4): 363-371. doi: 10.3969/j.issn.1001-4810.2010.04.003

Citation:

KONG Xiang-sheng, QI Shi-hua, Oramah I T, ZHANG Yuan, HUANG Bao-jian. Distribution of organichlorine pesticide in the water and sediment of the Bailang Subterranean Stream in Guangxi[J]. CARSOLOGICA SINICA, 2010, 29(4): 363-371. doi: 10.3969/j.issn.1001-4810.2010.04.003

Citation:

KONG Xiang-sheng, QI Shi-hua, Oramah I T, ZHANG Yuan, HUANG Bao-jian. Distribution of organichlorine pesticide in the water and sediment of the Bailang Subterranean Stream in Guangxi[J]. CARSOLOGICA SINICA, 2010, 29(4): 363-371. doi: 10.3969/j.issn.1001-4810.2010.04.003

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Distribution of organichlorine pesticide in the water and sediment of the Bailang Subterranean Stream in Guangxi

doi: 10.3969/j.issn.1001-4810.2010.04.003

1.
Key Laboratory of Biogeolog y and Environmental Geology, China University of Geosciences, Ministry Education；Institute of Karst Geology, CAGS；Key Open Laboratory of Karst Ecosystem and Rocky Desertification Control, CAGS
2.
Key Laboratory of Biogeolog y and Environmental Geology, China University of Geosciences, Ministry Education
3.
Institute of Karst Geology, CAGS

Received Date: 2010-09-02
Publish Date: 2010-12-25

Abstract

Abstract

In order to understand distribution of organochlorine pesticide in the water and sediments of the Bailang Subterranean Stream in typical karst area in Leye, Guangxi, the water and sediment samples on different sections are collected and 19 kinds of OCPs are detected with GC-ECD. The results show that,(1)The total organochlorine pesticides concentration(∑OCPs) in the surface water of the Bailang subterranean stream ranges from 1.95 to 71.45ng/L, the concentration of HCHs ranges from undetectable to 58.40ng/L, and DDTs undetectable to 0.44ng/L respectively. (2)The concentration of∑OCPs in the sediment ranges from 0.75 to 14.85ng/L, HCHs from 0.11 to 3.52ng/L, and DDTs from 0.03 to 2.90ng/L. (3)Distributions of OCPs in water and sediment from the Bailang Subterranean Stream are related with adsorption, temperature and the soil erosion at the bottom of Tiankeng where connected with subterranean stream. Namely, OCPs of atmospheric sedimentation is easily gathered in soil at the bottom of Tiankeng for temperature difference effect (this is “cool trap effect”), and then, OCPs moves toward the water body so that concentration of ∑OCPs in sediment of the subterranean stream increases. (4)It is inferred that the OCPs in the sediment of the subterranean stream could be released to cause secondary pollution for the value of the sediment adsorption coefficient being lowest at the exit of the stream, but higher in concentration and kinds of OCPs in the stream water. (5)The ecological risk is at the low risk due to concentrations of the endrin on most sections and both DDTs and DDD on the section of the Leye County surrounding areas range between effects range to low(ERL) and effects range to median(ERM). (6)There are both newly HCHs and DDTs inputs recently on some sections. Organochlorine pesticide has accumulated for along time, which may be cause harm to the underground river ecosystem. Therefore, local government should take preventive measure.
- organochlorine pesticide (OCPs),
- sediment,
- distribution characteristics,
- great doline (Tiankeng),
- Bailang Subterranean Stream,
- Guangxi

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References(27)

References

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Distribution of organichlorine pesticide in the water and sediment of the Bailang Subterranean Stream in Guangxi

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Distribution of organichlorine pesticide in the water and sediment of the Bailang Subterranean Stream in Guangxi

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