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| Status of organochlorine pesticide pollution on surface soil of Huixian wetland in Guilin, China |
| Received:July 03, 2020 |
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| KeyWord:surface soil;organochlorine pesticides;residual characteristics;source apportionment;Huixian wetland |
| Author Name | Affiliation | E-mail | | CHENG Cheng | Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China | | | LIU Wei-jie | Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China | | | HU Tian-peng | Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China | | | XING Xin-li | Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, Ministry of Natural Resources, IRCK by UNESCO, Guilin 541004, China
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China | xlxing@cug.edu.cn | | MAO Yao | State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China | | | SHI Ming-ming | Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China | | | XU An | Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China | | | SU Ye-wang | Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China | | | LI Xing-yu | Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China | | | YU Hai-kuo | Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China | | | QI Shi-hua | Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China | |
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| Abstract: |
| In order to better understand the status of organochlorine pesticide(OCP)pollution on surface soil of Huixian wetland, surface soil samples of different depths from different types of land uses were collected from 18 sites in Huixian wetland in November 2019. 24 OCPs in soil were detected by GC-ECD, and their residual characteristics, sources, and ecological risks were analyzed. The detection rates of OCPs were above 80%, and the total concentrations of 24 OCPs ranged from 3.56 ng·g-1 to 69.7 ng·g-1, with a mean value of 14.0 ng·g-1. Compared with the soil of other studied areas, the residues of OCPs in Huixian wetland were at a lower level, while dichlorodiphenyltrichloroethanes(DDTs)and methoxychlor (MXC)accounted for a higher proportion of OCPs. The distribution of OCPs was characterized by a high residue in agricultural soil and soil with a depth of 0~10 cm. The historical residues of industrial DDTs and other traditional pesticides were the main sources of OCPs in the soil; however, new input could not be ignored. Results of ecological risk assessment indicated that the ecological risk of HCHs in soil was low; however, DDTs might have some potential ecological risk impact on the studied area. |
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