Ecological risks and potential sources of heavy metals in agricultural soils from Huanghuai Plain, China

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• 作者：Lingli Zhou (1)
  Bing Yang (1)
  Nandong Xue (1)
  Fasheng Li (1)
  Hans Martin Seip (2)
  Xin Cong (3)
  Yunzhong Yan (1) (3)
  Bo Liu (1)
  Baolu Han (1)
  Huiying Li (1)
  
• 关键词：Agricultural soil ; Ecological risk ; Heavy metals ; Huanghuai Plain ; Principal component analysis ; Source
• 刊名：Environmental Science and Pollution Research
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：21
• 期：2
• 页码：1360-1369
• 全文大小：393 KB
• 作者单位：Lingli Zhou (1)
  Bing Yang (1)
  Nandong Xue (1)
  Fasheng Li (1)
  Hans Martin Seip (2)
  Xin Cong (3)
  Yunzhong Yan (1) (3)
  Bo Liu (1)
  Baolu Han (1)
  Huiying Li (1)
  
  1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
  2. Department of Chemistry, University of Oslo, Blindern, P.O. Box 1033, Oslo, 0315, Norway
  3. College of Resource and Environmental Engineering, Liaoning Technical University, Fuxin, 123000, China
  
• ISSN：1614-7499

文摘

A total of 224 agricultural soil samples from Huanghuai Plain in China were investigated for the concentrations of seven heavy metals (As, Cd, Cr, Hg, Ni, Pb, and Zn). The mean concentrations of the metals were 12, 0.17, 79, 0.04, 35, 25, and 74?mg/kg, respectively. These values are similar or slightly higher than background values in this region, except for Cd with a mean nearly twice the background value. The estimated ecological risks based on contamination factors and potential ecological risk indexes are also mostly low, but considerable for Cd and Hg. Multivariate analysis (including Pearson's correlation analysis, hierarchical cluster analysis, and principal component analysis) clearly revealed three distinct metal groups, i.e., Cr/Ni/Zn, As/Cd/Pb, and Hg, whose concentrations were closely associated with the distribution and pollution characteristics of industries in and around the plain. The main anthropogenic sources for the three metal groups were identified as atmospheric deposition, sewage irrigation/fertilizers usage, and atmospheric deposition/irrigation water, respectively. The present results are well suited for planning, risk assessment, and decision making by environmental managers of this region.