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Geoscience ›› 2012, Vol. 26 ›› Issue (5): 953-962.

• Geochemistry • Previous Articles     Next Articles

Study on Environmental Criteria for Heavy Metal of  Farmland Soil in Chengdu Plain

 WANG  Ying-1, HOU  Jing-Xie-1, YANG  Zhong-Fang-1, YANG  Xiao-Yan-1, JIN  Li-Xin-2, LI  Zhong-Hui-2   

  1. 1 School of Earth Sciences and Resources,China University of Geosciences,Beijing100083,China;
    2 Sichuan Geological Survey,Chengdu,Sichuan610081,China
  • Received:2012-06-26 Revised:2012-08-22 Online:2012-10-19 Published:2012-10-23

Abstract:

Soil heavy metal pollution has become a major factor in restricting development of human society. The principal impediment in the remediation of contaminated sites and in the protection of groundwater quality is the lack of appropriate standards for heavy metals in soils. There are no standards applicable to predict the potential for groundwater contamination by heavy metals in Sichuan. This paper aimed to provide the environmental criteria of heavy metals in Chengdu Plain farmland for the purpose of protecting the drinking water. The results indicated that:(1) the partition coefficient(Kd)of As,Cd,Hg and Pb were quite different in different types of soil; (2) environmental criteria of Hg and Cd were much close in different types of soil,while Hg was 0.3 μg/g and Cd were in the range of 0.3 μg/g to 0.5 μg/g. In contrast,environmental criteria of As and Pb were much different,for As were 18 μg/g to 24 μg/g and Pb were 24 μg/g to 41 μg/g;(3) heavy metals in the study area were basically below the given environmental criteria except Cd,Pb and Hg in a few types of soil. These results played an important role in risk assessment for the study area.

Key words: heavy metal, environmental criteria, ecological security, drinking water, partition coefficient(Kd), Chengdu Plain farmland