成都市城市土壤中重金属的现状评价  

Evaluation of the current quality about heavy metals in urban soils of Chengdu, China

作　　者：施泽明[1] 倪师军[1] 张成江[1] 曾英[1] 吴涛[1] 

机构地区：[1]成都理工大学地球化学系,成都610059

出　　处：《成都理工大学学报（自然科学版）》2005年第4期391-395,共5页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：中国地质调查局资助项目(200314200015)

摘　　要：成都市城市土壤的研究显示,土壤中Hg,Cd,As,Cr,Pb,Cu,Zn含量分别为0.31μg/g,0.36μg/g,11.0μg/g,60μg/g,76.9μg/g,42.0μg/g,224μg/g,研究区范围内土壤中重金属平均含量除Cd外,均低于国家土壤二级质量标准。Tessier连续提取法镉形态分析结果表明,镉可交换态含量比例高达33.16%。与国内外其它城市比较,Hg含量较高;Cr,Cu,Zn含量处于中等水平;Cd,As,Pb含量水平相对较低。主要污染来源与工业布局、燃煤、交通、乡镇企业分布等因素有关。Based on the urban soil research, the authors have found the contents and spatial distribution of heavy metals in urban soils of Chengdu. The results show that the average concentrations of total Hg, Cd, As, Cr, Pb, Cu, Zn are 0.31μg/g, 0.36μg/g, 11.0 μg/g, 60μg/g, 76.9μg/g, 42.0μg/g, 224μg/g, respectively. Except Cd, the average contents of the other heavy metals are all under the national grade Ⅱ quality standard. The percent of Cd exchangeable form is 33.16%. Compared with the other cities in the world, the authors find that the concentration of Hgin Chengdu is relatively higher, that of Cr, Cu, Zn middle and that of Cd, As, Pb relatively lower. The pollution is mainly caused by industry layout, burning of coal and traffic, et al.

关 键 词：城市土壤 重金属 空间分布 污染源 赋存形态 

分 类 号：X53[环境科学与工程—环境工程]