Effect of Copper Contamination on Soil Quality and Transport to the Environment
Copper (Cu) is one of the heavy metals which cause contamination to agricultural soils at a large scale due to repeated application of Cucontaining fertilizers, fungicides, and farm manures as well as waste disposal in agriculture. Laboratory simulation and field monitoring studies were conducted to examine the biogeochemistry aspects of Cu in contaminated soils and subsequent impacts on soil quality and the environment. The results from the studies demonstrated that Cu contamination caused soil acidification due to the exchange of H+/Al3+ by loaded Cu2+, and soil pH decreased by 0.3-0.9 units, depending on soil type and Cu loading level. The biggest proportion of soil Cu was present as organically-bound, ranging from 25.2% to 58.1%. Both the recoverable Cu and Mehlich 3 extractable Cu were significantly correlated with this Cu fraction (P<0.001). The concentrations of Cu in surface runoff water from agricultural fields were significantly correlated with CaCl2 extractable Cu in soils. These results indicate that Cu contamination results in soil acidification and enhances the transport of Cu from land to waters by surface runoff or leaching process.
copper contamination environment protection fractionation soil quality specific adsorption
HE Zhenli FAN Jinghua YANG Xiaoe STOFFELLA Peter J.
University of Florida,Indian River Research and Education Center,2199 S Rock Rd,Fort Pierce,FL 34945 Laboratory，Polluted Environment Remediation and Ecological Health,Education Ministry of China,Colleg
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
1892-1898
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）