RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2020, Vol. 29 >> Issue (8): 1858-1864.doi: 10.11870/cjlyzyyhj202008017

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Characteristics and Assessment of Heavy Metal Pollution in Soil Under Two Land Use

HE Ru-hai 1,XUE Zhong-jun 2, LIU Na 2, LI Qing-song 1, HU Hong-xiang 2   

  1. (1. School of Economics and Management, Anhui Agricultural University, Hefei 230036, China;
    2. School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)
  • Online:2020-08-20 Published:2020-09-21

Abstract: In order to characterize the heavy metal pollution in farmland and woodland (Koelreuteria integrifoliola plantation) around mining area in Tongling City, Anhui Province, the Tomlinson Pollution Load Index and Bio-concentration Factor were applied to evaluate the pollution level of soil heavy metals pollution levels of Cd and Cu, and the enrichment level of plant heavy metals in the research area.The results showed that the total contents of Cd and Cu of farmland in the study area were 2.34 and 161.25 mg/kg respectively, which are higher than 1.26 and 80.15 mg/kg respectively in woodland.Both exceeded risk screening value of agricultural land soil contamination(GB 15618-2018, pH≤5.5) and soil heavy metal background value in Tongling City. The soil pollution level of farmland and woodland were moderate pollution and slight pollution respectively.The content of Cd in brown rice (0.95 mg/kg) seriously exceeded limit for Cd in “National Standard for Food Safety” (GB 2762-2017). The enrichment factors of Cd and Cuin above-ground organs of K. integrifoliola were lower than those of rice. In sum, the pollution of Cd and Cu in the woodland (K. integrifoliola plantation) both are lower than those in farmland,and returning farmland to forest is a better land use option in the study area.

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