Pollution Characteristics and Assessment of Heavy Metal in Different Land-use Types in Tianjin City
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    Abstract:

    [Objective] The heavy metal pollution status and pollution sources in soil of Tianjin City was studied in order to provide a theoretical basis for preventing soil heavy metal pollution.[Methods] A total of 146 samples were collected from the industrial areas, farmland, water sources, livestock farm and vegetable bases in Tianjin City. The pollution characteristics of heavy metals, mainly refering to the heavy metal content in soils of different land-use types, was evaluated by single factor pollution index and Nemero comprehensive pollution index method, and the sources of heavy metals were also discussed.[Results] The results showed that different heavy metals were all found accumulated in soils, but the overall pollution level in Tianjin City was lower. The over standard rates of Pb, Ag and Cd were 84.25%, 76.71% and 68.49%, respectively. And land-use types affected the accumulation degree and categories of heavy metals. The vegetable base had the highest accumulations of total heavy metal among 5 land-use types, mainly including Cd, Hg, As, Cr, Cu, Ni, V, Mn, Co and Ag. The industrial area had the highest Zn concentration, while the Pb concentration was higher in the farmland, and livestock and poultry farmland.[Conclusion] In an overall, the level of soil pollution in Tianjin City is relatively low. However, in terms of land-use types, the pollution levels of Pb and Zn in the industrial areas, farmland and livestock farms were higher, wherein it should be paid more attention to in the process of land use and management.

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李炜,周笑白,王斌,丁冬梅,武丹,张赞.天津市不同土地利用方式下土壤重金属污染特征及评价[J].水土保持通报英文版,2018,38(6):200-205

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History
  • Received:February 17,2018
  • Revised:June 01,2018
  • Adopted:
  • Online: January 07,2019
  • Published: