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Background Concentrations of Soil Heavy Metals in Beijing
Author(s): CHEN Tongbin, ZHENG Yuanming, CHEN Huang, ZHENG Guozuo
Pages: 117-
122
Year: 2004
Issue:
1
Journal: ENVIRONMENTAL SCIENCE
Keyword: 北京市; 土壤; 重金属; 背景值;
Abstract: 在大规模、系统取样布点的基础上,从803个土壤样品中选出其中120个的"清洁"土壤样品,分析统计后提出了北京市土壤重金属的背景值.研究结果表明,北京市土壤As含量的背景值为7.09 mg/kg、Cd为0.119 mg/kg、Cr为29.8 mg/kg、Cu为18.7 mg/kg、Ni为26.8 mg/kg、Pb为24.6 mg/kg、Zn为57.5 mg/kg.与以前研究中所提出的背景值相比,本研究新提出的土壤Cd背景值提高125%,Pb和Ni的背景值没有明显的差异,但是As、Cr、Cu、Zn的土壤背景值则降低19%~55%.
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