Contents and Distribution of Cd, Cr, Zn and Ni in Tea Garden Soils, Southwest China

摘要：

To evaluate the pollution situation and activity of heavy metals, Cd, Cr, Zn and Ni, in the natural tea garden soils, the content and fractionation of Cd, Cr, Zn and Ni in the tea garden soils were studied in the paper by collecting the natural tea garden soils from four tea gardens located in main tea areas of Southwest China and using the sequential extraction procedure. The results showed that there were obvious difference in the total Cd, Cr, Zn and Ni concentrations among tea garden soils, but all of them were lower than the national second degree criteria of environmental quality for heavy metals in Chinese soils (GB15618-1995). The distribution of the heavy metals in these tea garden soils was in the decreasing order of residual ≈ exchangeable＞Fe-Mn oxides＞ organic＞carbonate for Cd and Ni and residual ≈exchangeable＞carbonate＞organic＞Fe-Mn oxides for Cr and Zn, respectively. The three heavy metals, Zn, Ni and Cr, were mostly concentrated in the residual fraction, and the active fraction of Cd, however, was majority in the total amount of soil Cd. According to the active fraction percentage, the mobility and bioavailability of the metals in the tea garden soils should be the order of Cd＞Ni＞Cr＞Zn. The higher percentage of Zn in the residual fraction probably reflects the tendency to become unavailable once it enters in tea garden soils.

作者: XIE Zhonglei WANG Xiaoying CAO Kaiyu LI Xiaoying QUAN Fumin

作者单位: College of Environment and Resource, Jilin University, Changchun 130012，Jilin, China College of Plan College of Environment and Resource, Jilin University, Changchun 130012，Jilin, China College of Chemistry, Jilin University, Changchun 130012, Jilin, China

会议类型: 国际会议

会议名称: 2011 International Symposium on Environmental Science and Technology(2011 环境科学与技术国际会议 2011 ISEST)

会议地点: 广东东莞

会议语种:英文

页码: 216-221

在线出版日期: 2011-06-01（万方平台首次上网日期，不代表论文的发表时间）