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© 2019 Yang M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

RESEARCH ARTICLE | OPEN ACCESS DOI: 10.23937/2572-4061.1510018

Heavy Metals Contents and Risk Assessment of Farmland on the Edge of Sichuan Basin

Mengling Yang2,3, Dan Zhang2*, Lu Xu2,4, Shamshad Khan2, Fan Chen1 and Hao Jiang2

1Tobacco Company of Liangshan, China

2Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, China

3Bossco Environmental Protection Group, China

4University of Chinese Academy of Sciences, China


This study features a survey of the concentrations of heavy metals (Cu, Cd, Cr, Ni, Pb, Mn, Co, Se) in surface soils (0-30 cm), carried out in edge of Sichuan Basin (Pingdi, Puan, Xingwen, Gulin). The contamination of heavy metals in soil was assessed with single-factor pollution index method and Nemerow comprehensive pollution index method. The results showed that Cu, Cr, Ni, Pb, Co were main risk factors of soil heavy metal pollution. In Gulin, the concentrations of Cd, Mn and Se were higher than other three areas, with the sample over-standard rate of 90, 20 and 30%. The Nemerow assessment showed that the comprehensive pollution index of Gulin was above 1, while Pingdi, Xingwen, Puan was below 1. It indicated that the soil in Gulin was slight polluted, and the soil in Pingdi, Xingwen, Puan were clean.