[Background concentrations of soil heavy metals in Beijing].
[Background concentrations of soil heavy metals in Beijing].
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发表时间：
2004
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影响因子：
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通讯作者：
Tongbin Chen;Yuan-ming Zheng;Huang Chen;G. Zheng
中科院分区：
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作者：
Tongbin Chen;Yuan-ming Zheng;Huang Chen;G. Zheng
土壤重金属本底浓度是评价土壤环境质量的重要指标。通过对北京地区土壤重金属As、Cd、Cr、Cu、Ni、Pb、Zn的背景浓度进行了调查。从803份土壤样品中选取了无重金属污染地区的土壤样品约120份。采用严格的质量保证和质量控制（QA/QC）程序对样品进行分析后，采用统计学方法计算土壤中重金属的浓度。订正后的北京地区土壤背景浓度分别为：As 7.09 mg/kg、Cd 0.119 mg/kg、Cr 29.8 mg/kg、Cu 18.7 mg/kg、Ni 26.8 mg/kg、Pb 24.6 mg/kg、Zn 57.5 mg/kg。与1990年中国国家环境监测中心（CNEMC）建议的浓度相比，本研究建议的Cd背景浓度比CNEMC高约125%，As、Cr、Cu、Zn浓度比CNEMC低19% ~ 55%，Pb、Ni浓度与CNEMC没有明显差异。
Soil background concentrations of heavy metals are important criterion for the assessment of soil environmental quality. The background concentrations of soil heavy metals, As, Cd, Cr, Cu, Ni, Pb and Zn, were investigated based on an extensive investigation conducted in the whole area of Beijing. About 120 soil samples taken from the area without pollution of heavy metals were selected from the total 803 soil samples. After analyzing the samples with strict quality assure and quality control (QA/QC) procedures, the heavy metal concentrations in the soils were calculated using statistical method. The revised background concentrations of the soils in Beijing are proposed to be 7.09 mg/kg for As, 0.119 mg/kg for Cd, 29.8 mg/kg for Cr, 18.7 mg/kg for Cu, 26.8 mg/kg for Ni, 24.6 mg/kg for Pb, 57.5 mg/kg for Zn, respectively. Compared with the concentrations suggested by China National Environmental Monitoring Center (CNEMC) in 1990, the Cd background concentration suggested in present study is about 125% higher than that of CNEMC, and the As, Cr, Cu, Zn concentrations are 19%-55% lower than those of CNEMC, while the concentrations of Pb and Ni are not obviously different from those of CNEMC.