Volume 8 Issue 6
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Article Navigation >  Journal of Environmental Engineering Technology  > 2018  >  8(6): 602-609
QIAO Fei, SHI Yao, QIN Yanwen, MA Yingqun, LIU Zhichao, YANG Chenchen. Spatial distribution and pollution assessment of heavy metals in Minjiang River mainstream[J]. Journal of Environmental Engineering Technology, 2018, 8(6): 602-609. doi: 10.3969/j.issn.1674-991X.2018.06.080
Citation: QIAO Fei, SHI Yao, QIN Yanwen, MA Yingqun, LIU Zhichao, YANG Chenchen. Spatial distribution and pollution assessment of heavy metals in Minjiang River mainstream[J]. Journal of Environmental Engineering Technology, 2018, 8(6): 602-609. doi: 10.3969/j.issn.1674-991X.2018.06.080
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Spatial distribution and pollution assessment of heavy metals in Minjiang River mainstream

doi: 10.3969/j.issn.1674-991X.2018.06.080

  • Water Environment Management and Research Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

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  • Corresponding author: 秦延文 E-mail: qinyw@craes.org.cn
  • Received Date: 2018-07-21
  • Publish Date: 2018-11-20
    Abstract
  • In order to explore the pollution level of heavy metals in Minjiang River mainstream, the contents and spatial distribution of As, Cd, Cr, Cu, Pb and Zn in surface water, suspended solids and surface sediments were analyzed. The integrated pollution index and geoaccumulation index were used to evaluate the contamination degree of heavy metals in surface water and surface sediments respectively. The results indicated that the contents of the heavy metals in surface water were below Grade I standard of Environmental Quality Standards for Surface Water (GB 3838-2002). The contents of the 6 heavy metals in suspended solids exceeded the average contents of the stream sediments in China. Similar patterns of spatial distribution in suspended solids were observed for As, Cr and Pb, with the highest contents both at the middle and lower reaches. The contents of Cd and Pb in surface sediments exceeded the average contents of the stream sediments in China. Similar patterns of spatial distribution in surface sediments were observed for Cr and Cu, with the highest contents at the downstream in Yibin section. The contents of Cd in suspended solids and surface sediments were the highest, being 2.99 mg/kg and 39.94 mg/kg respectively, which were 23.00 and 307.23 times the average contents of the stream sediments in China. The integrated pollution index assessment showed that the water quality of surface water was good in Minjiang River mainstream, and the geoaccumulation index assessment showed that Cd was the major pollution element in surface sediments.

     

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