Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (5): 1451-1464.doi: 10.13278/j.cnki.jjuese.20170087

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Groundwater Contamination and Human Health Risk Assessment in Jinghui Irrigation District, Shaanxi Province

Zhang Yan1,2, Xu Bin3,4, Liu Xiuhua3,4   

  1. 1. School of Earth Science and Resources, Chang'an University, Xi'an 710054, China;
    2. Shaanxi Key Laboratory of Land Consolidation, Xi'an 710054, China;
    3. School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, China;
    4. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region(Chang'an University), Ministry of Education, Xi'an 710054, China
  • Received:2017-12-28 Online:2018-09-26 Published:2018-11-20
  • Supported by:
    Supported by National Science Foundation of China (41273104), Subjects Innovation and Talents Introduction Plan of Colleges and Universities (B08039) and Fund Project of Shaanxi Key Laboratory of Land Consolidation(2018-JC09)

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Abstract: In order to investigate the potential human health risk of groundwater contamination in the Jinghui irrigation district in Shaanxi Province, the samples of groundwater were collected, and their physical and chemical characteristics were analyzed through laboratory test. The contamination was evaluated by using a single factor index method, and the spatial distribution of As, Cr(Ⅵ) and NO3--N were obtained by GIS. The human health risk of the groundwater contaminants were assessed by using human health risk assessment model. The results show that the concentration of As, Cr(Ⅵ) and NO3--N of groundwater in the study area exceeds the limits, the carcinogenic risk of As for adults reaches 3.50×10-4, beyond the limit of 1.00×10-4. A long-term exposure to As increases the risk of getting cancer. The ranking of non-carcinogenic risk of As, Cr(Ⅵ) and NO3--N is Cr(Ⅵ) > NO3--N > As,the non-carcinogenic risk of Cr(Ⅵ) for children reaches 8.693 7, far beyond the limit of 1.000 0. The human health risks resulted from oral exposure to the three contaminants are higher than those from dermal exposure. Spatially, As carcinogenic risk area is up to 42.82%, and the area ratios of the non-carcinogenic risk caused by As, Cr(Ⅵ) and NO3--N are 69.19%、69.06% and 66.55% respectively, the local water safety is a serious problem.

Key words: groundwater, contamination, human health, risk assessment, Jinghui irrigation district

CLC Number: 

  • X523
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