北京市土壤重金属含量背景值的系统研究_陈同斌.pdf

25 1 Vol.25, No. 1 2004 1 Jan. ,2004 ENVIRONMENTAL S IEN E , , , ( , 100101; Email: chentb@ igsnrr. ac.cn) :, 803 120 , ., As 709 mg/ kgd 0119 mg/ kgr 298 mg/ kgu 187 mg/ kgNi 268 mg/ kgPb 246 mg/ kgZn 575 mg/ kg. , d 125% ,Pb Ni,AsruZn 19%~ 55% . :; ; ; : X144,X53 :A : 2004) Background Concentrations of Soil Heavy Metals in Beijing HEN Tongbin, ZHENG Yuanming, HEN Huang,ZHENG Guodi ( Laboratory of Environmental Remediation, Institute of Geographic Sciences and Natural Resources Research, hinese Academy of Sciences, Beijing 100101, hina) Abstract:Soil background concentrations of heavy metals are important criterion for the assessment of soil environmental quality. The background concentrations of soil heavy metals, As, d, r, u, Ni, Pb and Zn, w ere investigated based on an extensive investiga tion conducted in the whole area of Beijing. About 120 soil samples taken from the area w ithout pollution of heavy metals were select ed from the total 803 soil samples. After analyzing the samples w ith strict quality assure and quality control (QA/ Q ) 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 709 mg/ kg for As, 0119 mg/ kg for d, 298 mg/ kg for r, 187 mg/ kg for u, 268 mg/ kg for Ni, 246 mg/ kg for Pb, 575 mg/ kg for Zn, respectively. ompared w ith the concentrations suggested by hina National Environ mental Monitoring enter ( NEM ) in 1990, the d background concentration suggested in present study is about 125% higher than that of NEM , and the As, r, u, Zn concentrations are 19% ~ 55% lower than those of NEM , while the concentra tions of Pb and Ni are not obviously different from those of NEM . Key words:Be