The changes of heavy metal contents in wetland soil as an effect of cultivation

摘要：

Through comparing the contents of heavy metals of soil in natural wetlands and farmlands in the Sanjiang Plain, Northeast of China, this paper studied the effect of wetland cultivation on the changes of Fe, Cd, Cr, Cu, Mn, Pb and Zn contents in wetland soil. The results showed that a sharp decrease of total organic carbon (TOC) contents and 0.5 unit increase of pH values of soil have found in farmlands compared with in wetlands. Wetland cultivation led to Fe, Cr and Mn accumulation in soil and Cd, Cu and Zn release from soil. Exceptionally, Pb presented different trends in soybean and rice fields, with no significant change in soybean field while an obvious accumulation in rice field was found. Fe, Cr and Mn contents were positively correlated to pH, and negatively to TOC. However, Cu and Zn contents were negatively correlated to pH, and positively to TOC. Both Cd and Pb were not significantly correlated to pH or TOC. This indicated that wetland cultivation was an important factor influencing the fate of heavy metals in soil.

关键词： Heavy metal wetland cultivation

作者: J. S. Yang J. S. Liu L. N. Sun

作者单位: Key Laboratory of Environmental Engineering, Shenyang University, Shenyang, 110044, P. R. China Nort Northeastern Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun Key Laboratory of Environmental Engineering, Shenyang University, Shenyang, 110044, P. R. China

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 140-141

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）