城市地表土壤重金属污染反演问题研究  

Study on Inversion Problem of Heavy Metal Contamination of a Urban Surface Soil

作　　者：刘振东[1] 董胜伟[1] 

机构地区：[1]安阳工学院数理学院,河南安阳455000

出　　处：《昆明理工大学学报（自然科学版）》2013年第3期95-102,共8页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51075003)

摘　　要：在某城区采集地表土壤(1～10 cm)样品319个,其中138个样品来源于交通区,利用X射线荧光光谱仪测试其8种重金属元素Hg、Cd、Pb、Cr、As、Cu、Zn和Ni的含量.城区地表土壤重金属含量与背景区重金属含量均值之差作为重金属含量异常.借助等值线法、导数分析法、主成分分析法等对地表土壤的重金属含量异常进行反演计算,结果表明该城区污染源呈点状分布;工业区污染负荷指数是山区的3.1倍;交通区有62.95%的污染物质来源于工业污染和交通污染.319 surface soil（ 1 - 10 cm） samples are collected in a city, 138 of which are from the traffic area. Their content of 8 kinds of heavy metal elements Hg, Cd, Pb, Cr, As, Cu, Zn and Ni is measured by the X- ray fluorescence spectrometer. The difference between the heavy metal content of the city soil and its background mean value is taken as the heavy metal content anomaly. The inversion calculation of the anomalies is carried out by contour method, derivative analysis and principal component analysis. It is shown through the results that the urban pollution sources display spotty distribution ; the pollution load index of industrial zone is 3.1 times of that in the mountainous area; 62.95 % of pollutants in traffic area come from the surrounding industrial pollution and traffic pollution.

关 键 词：重金属 反演问题 地表土壤 城市 

分 类 号：X825[环境科学与工程—环境工程]