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| Distribution of organochlorine pesticides(OCPs) in the water body of Huixian Karst wetland of Guilin and environmental risk assessment of OCP mixtures |
| Received:September 29, 2017 |
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| KeyWord:organochlorine pesticides;Karst wetland;Huixian wetland;residual characteristics;risk assessment |
| Author Name | Affiliation | E-mail | | FU Xin | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China | | | LIANG Yan-peng | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China | ypliang1980@163.com | | QIN Li-tang | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China | | | ZENG Hong-hu | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China | | | MO Ling-yun | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China | | | WANG Dun-qiu | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China | | | QIN Lu-mei | College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China | |
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| Abstract: |
| In order to investigate residual levels, distribution characteristics, sources, and environmental risk of organochlorine pesticides(OCPs) in the Huixian Karst wetland of Guilin, 88 water samples were collected from surface waters(lake water and canal water) and shallow groundwater in April, July, and October 2016 and January 2017. Fifteen different species of OCPs were quantitatively determined using a gas chromatography with an electron capture detector(GC-ECD). Results showed that the residues of OCPs in the lake water, canal water, and shallow groundwater ranged 68.7~305 ng·L-1(mean value:137 ng·L-1), 77.4~211 ng·L-1(mean value:137 ng·L-1), and 24.6~76.4 ng·L-1(mean value:38.6 ng·L-1), respectively. A majority of the OCPs detected were HCHs, accounting for more than 61.7%, followed by heptachlor(heptachlor and heptachlor epoxide) and DDTs. Residual levels of OCPs in the surface water from the Huixian wetland were present at higher levels, whereas moderate levels of residues were observed in the shallow groundwater, compared with respective data. Additionally, the highest residue levels of OCPs were found in summer. Results presented herein indicate that the HCH residues were mainly from a historical source, whereas the source of lindane might be from a new input as of October 2016. The residues of DDTs were most likely due to their persistence against degradation. Environmental risk assessment of the OCP mixture suggested that crustaceans were the most sensitive aquatic species, followed by fish and algae. The mixture of OCPs showed a moderate risk to aquatic organisms living in shallow groundwater, whereas it posed a high risk to living organisms in the surface waters. |
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