Journal of Guangxi Normal University(Natural Science Edition) ›› 2020, Vol. 38 ›› Issue (6): 102-113.doi: 10.16088/j.issn.1001-6600.2020.06.012

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Pollution Characteristics and Health Risk Assessment of Volatile Organic Compounds of Typical Karst Groundwater Source in North China

GUO Yongli1,2*, QUAN Xiqiang1, WU Qing1   

  1. 1. Institute of Karst Geology, Chinese Academy of Geological / Key Laboratory of Karst Dynamics, Ministry of Natural Resources and Guangxi, Guilin Guangxi 541004, China;
    2. International Research Center on Karst Under the Auspices ofUnited Nations Educational, Scientific and Cultural Organization, Guilin Guangxi 541004, China
  • Received:2019-10-15 Published:2020-11-30

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Abstract: In order to study pollution characteristics of volatile organic compounds (VOCs) and their health risk assessment on humans in karst groundwater located in Linzi distinct, Zibo city, Shandong province, 19 groundwater samples were collected, 54 VOCs were analyzed. Detection rate, spatial distribution characteristics and influencing factors of VOCs in karst groundwater were analyzed by using mathematical statistics method and graphical method based on the GIS platform and SPSS software. Not cancer risk (NCR) and Incremental lifetime cancer risk (ILCR) of VOCs of drinking the karst groundwater were calculated by the model recommended by United States Environmental Protection Agency (US EPA). VOCs could be detected in 16 sample sites in the study areas, there were 20 VOCs existing the groundwater samples. The highest detection rate of a VOC was 68.42%. Trichloromethane had the highest concentration of 404.00 μg/L. Concentrations of 1,1-dichloroethane, trichloromethane, carbon tetrachloride, trichloroethylene in the D-8 site and trichloroethylene in the D-6 were higher than drinking water criterion of China or WHO. Spatial distribution of VOCs in groundwater had close correlation with chemical factories, groundwater flow field, landuse, human activities and others. The results showed that the maximum cancerous risk indexes along the two groundwater flow paths exceed the US EPA’s recommended risk index (10-6), the maximum cancerous risk index and noncancerous risks index exceeded the 10-4 and 1 (US EPA’s accepted standard) in the centralized chemical factories along the one groundwater flow path . Therefore, more attention should be paid to optimize groundwater environment and prevent further deterioration of groundwater quality, in order to ensure the safely drinking water sources and sustainable development of karst groundwater in Linzi distinct, Zibo city, Shandong province.

Key words: katst groundwater, volatile organic compounds, spatial distribution characteristics, influencing factors, health risk assessment, Zibo, Shandong, China

CLC Number: 

  • P641
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