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Temporal and spatial distribution, sources, and transport of organochlorine pesticides in the Chaoshuidong karst system
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Pei-pei ZHAO1, 2, Jun-wu XIONG1, 2, Chao ZHANG1, 2, Xiu-wen YANG1, 2, Chao-jie QIN3, Zhe QIAN4, Ya-hui ZHAO1, 2, Xue-ming ZHANG5, Wei LIU3, Shi-hua QI1, 4, Wei CHEN1, 2, 3, 4, 6, *
China Environmental Science | 2025, 45(1) : 292 - 301
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China Environmental Science | 2025, 45(1): 292-301
• Emerging Contaminants •
Temporal and spatial distribution, sources, and transport of organochlorine pesticides in the Chaoshuidong karst system
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Pei-pei ZHAO1, 2, Jun-wu XIONG1, 2, Chao ZHANG1, 2, Xiu-wen YANG1, 2, Chao-jie QIN3, Zhe QIAN4, Ya-hui ZHAO1, 2, Xue-ming ZHANG5, Wei LIU3, Shi-hua QI1, 4, Wei CHEN1, 2, 3, 4, 6, *
Affiliations
  • 1.School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
  • 2.Key Laboratory of Groundwater Quality and Health, Ministry of Education, China University of Geosciences, Wuhan 430078, China
  • 3.Institute of Geological Survey, China University of Geosciences, Wuhan 430074, China
  • 4.State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China
  • 5.The Fifth Geological Brigade of Shandong Geological and Mineral Exploration and Development Bureau, Tai’an 271000, China
  • 6.Hubei Key Laboratory of Resources and Eco-Environment Geology, Hubei Geological Bureau, Wuhan 430034, China
Published: 2025-01-20
Outline
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This study investigated the susceptibility of karst groundwater from surface pollution. A typical karst spring system (the Chaoshuidong in Yichang, Hubei Province of China) was selected to analyze the contamination characteristics, sources, and transport processes of organochlorine pesticides (OCPs). Water, soil, and sediment samples were collected in four seasons for OCP analysis. The results showed that the average concentrations of OCPs in surface water, spring water, soil and sediment samples from Chaoshuidong system were 8.25ng/L, 5.11ng/L, 15.9ng/g and 12.6ng/g, respectively. OCPs concentrations in the Chaoshuidong system were relatively lower than in other regions, with seasonal fluctuations closely correlated to hydrogeological conditions and OCPs transport dynamics. Composition analysis of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs)indicated that HCHs were primarily from agricultural inputs of Lindane(γ-HCH) in the water and sediments, while the technical HCH dominated in the soils. DDTs were mainly a mixture of inputs from technical DDT and dicofol pesticide in all three media. The contribution of OCPs from the soils in the recharge area to the upstream surface water and to the spring water was 87.8% and 58.3%, respectively, and the contribution of OCPs from the spring water in the discharge area to the spring sediments was 64.2%. This study demonstrated that OCPs can be rapidly transported from recharge area to discharge area through two primary pathways: surface transport and underground transport, subsequently contaminating water bodies.

karst spring system  /  organochlorine pesticides (OCPs)  /  multi-media transport  /  distribution  /  source appointment
Pei-pei ZHAO, Jun-wu XIONG, Chao ZHANG, Xiu-wen YANG, Chao-jie QIN, Zhe QIAN, Ya-hui ZHAO, Xue-ming ZHANG, Wei LIU, Shi-hua QI, Wei CHEN. Temporal and spatial distribution, sources, and transport of organochlorine pesticides in the Chaoshuidong karst system[J]. China Environmental Science, 2025 , 45 (1) : 292 -301 .
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Article Info
  • Receive Date：2024-06-03
  • Online Date：2026-03-18
  • Published：2025-01-20
Article Data
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History
  • Received：2024-06-03
Funding
Affiliations
    1.School of Environmental Studies, China University of Geosciences, Wuhan 430078, China
    2.Key Laboratory of Groundwater Quality and Health, Ministry of Education, China University of Geosciences, Wuhan 430078, China
    3.Institute of Geological Survey, China University of Geosciences, Wuhan 430074, China
    4.State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China
    5.The Fifth Geological Brigade of Shandong Geological and Mineral Exploration and Development Bureau, Tai’an 271000, China
    6.Hubei Key Laboratory of Resources and Eco-Environment Geology, Hubei Geological Bureau, Wuhan 430034, China
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
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Percentage of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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