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云南滇池沉积物中重金属的形态分布特征
引用本文:LI Ren-Ying,YANG Hao,ZHOU Zhi-Gao,L&#; Jun-Jie,SHAO Xiao-Hu,JIN Feng. 云南滇池沉积物中重金属的形态分布特征[J]. 土壤圈, 2007, 17(2): 265-272. DOI: 10.1016/S1002-0160(07)60033-2
作者姓名:LI Ren-Ying,YANG Hao,ZHOU Zhi-Gao,L&#   Jun-Jie,SHAO Xiao-Hu,JIN Feng
作者单位:State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: ryli75@163.com;Department of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044 (China);College of Geography Science, Nanjing Normal University, Nanjing 210097 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: ryli75@163.com;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: ryli75@163.com;College of Geography Science, Nanjing Normal University, Nanjing 210097 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: ryli75@163.com
基金项目:Project supported by the Science and Technology Program for Social Development of Jiangsu Province, China (No. BS2006060), the Startup Fund of Nanjing University of Information Science & Technology, the State Key Laboratory of Hydroiogy-Water Resources and Hydraulic Engineering, Hohai University (No. 2005406711) and the Jiangsu Key Laboratory of Environmental Change and Ecological Construction, Nanjing Normal University.
摘    要:Fractionation of heavy metals in sediments can help in understanding potential hazards of heavy metals. The present study analyzed total concentrations and fractions of selected heavy metals (Cd, Cr, Cu, Pb, and Zn) in surface sediments from Dianchi Lake, Yunnan Province, China, as well as factors that may affect distributions of the various heavy metal fractions. Total concentrations of the heavy metals decreased in the order Zn 〉 Cu 〉 Pb 〉 Cr 〉 Cd. These heavy metals, except Cr, were much higher than their background levels, indicating that Dianchi Lake was polluted by Cd, Zn, Pb, and Cu. Cadmium occurred mainly as the non-residual fraction (sum of the HOAc-soluble, reducible, and oxidizable fractions) (97.6%), and Zn (55.7%) was also predominantly found in the non-residual fraction. In contrast, most of the Cr (88.5%), Pb (81.8%), and Cu (59.2%) occurred in the residual fraction. Correlation analysis showed that total heavy metal concentrations, organic matter and reducible Fe were the main factors affecting the distributions of the various heavy metal fractions. In the Walhai section of Dianchi Lake (comprising 97% of the lake area), the concentrations of Cd, Zn, Pb, and Cu in the non-residual fraction were significantly lower (P ≤ 0.01 or 0.05) than those of the Caohal section (3% of the lake area). This indicated that potential heavy metal hazards in the Caohai section were greater than the Waihai section.

关 键 词:中国 滇池 重金属 水体污染 沉积物 分馏法
收稿时间:2006-09-30
修稿时间:2007-01-12

Fractionation of heavy metals in sediments from Dianchi Lake, China
LI Ren-Ying,YANG Hao,ZHOU Zhi-Gao,L,#; Jun-Jie,SHAO Xiao-Hua and JIN Feng. Fractionation of heavy metals in sediments from Dianchi Lake, China[J]. Pedosphere, 2007, 17(2): 265-272. DOI: 10.1016/S1002-0160(07)60033-2
Authors:LI Ren-Ying,YANG Hao,ZHOU Zhi-Gao,L&#   Jun-Jie,SHAO Xiao-Hua  JIN Feng
Affiliation:State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: ryli75@163.com;Department of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044 (China);College of Geography Science, Nanjing Normal University, Nanjing 210097 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: ryli75@163.com;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: ryli75@163.com;College of Geography Science, Nanjing Normal University, Nanjing 210097 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: ryli75@163.com
Abstract:Fractionation of heavy metals in sediments can help in understanding potential hazards of heavy metals. The present study analyzed total concentrations and fractions of selected heavy metals (Cd, Cr, Cu, Pb, and Zn) in surface sediments from Dianchi Lake, Yunnan Province, China, as well as factors that may affect distributions of the various heavy metal fractions. Total concentrations of the heavy metals decreased in the order Zn > Cu > Pb > Cr > Cd. These heavy metals, except Cr, were much higher than their background levels, indicating that Dianchi Lake was polluted by Cd, Zn, Pb, and Cu. Cadmium occurred mainly as the non-residual fraction (sum of the HOAc-soluble, reducible, and oxidizable fractions) (97.6%), and Zn (55.7%) was also predominantly found in the non-residual fraction. In contrast, most of the Cr (88.5%), Pb (81.8%), and Cu (59.2%) occurred in the residual fraction. Correlation analysis showed that total heavy metal concentrations, organic matter and reducible Fe were the main factors affecting the distributions of the various heavy metal fractions. In the Waihai section of Dianchi Lake (comprising 97% of the lake area), the concentrations of Cd, Zn, Pb, and Cu in the non-residual fraction were significantly lower (P ≤ 0.01 or 0.05) than those of the Caohai section (3% of the lake area). This indicated that potential heavy metal hazards in the Caohai section were greater than the Waihai section.
Keywords:Dianchi Lake  heavy metal fractions  lake sediment  organic matter  reducible Fe
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