铜陵市及其周边地区土壤重金属元素污染评价  

Assessment of heavy metal pollutions to the soils in Tongling City,Anhui

作　　者：殷汉琴[1] 陈富荣[1] 陈兴仁[1] 陈永宁[1] 贾十军[1] 王晓莺[1] 

机构地区：[1]安徽省地质调查院,合肥230001

出　　处：《安全与环境学报》2010年第3期98-102,共5页Journal of Safety and Environment

基　　金：中国地质调查局国土资源大调查项目(200314200022);"安徽省生态农业地质调查评价方法技术研究与应用"创新团队项目(2008-009)

摘　　要：为了探讨和评价矿产资源利用过程对土壤污染的可能贡献,采用Nemerow综合污染指数法评价了典型有色金属矿山城市——铜陵市及周边地区土壤中重金属元素污染程度,并采用Kriging插值法进行了空间分析,查明了不同污染级别土壤的面积比例、空间分布和初步成因。结果表明,铜陵地区土壤中重金属污染指数从大到小依次为Cd、Cu、As、Zn、Pb,以Cd、Cu元素污染最为突出。重金属污染土壤主要集中在研究区南部,污染强弱与区内铜、金多金属矿床(点)空间分布基本一致。岩矿石风化、矿山开采、选冶等是造成该区土壤重金属污染的主要原因。This paper is to investigate the effects of heavy metal pollution due to mining exploration on the soil quality of Tongling Mining area, Tongling city, a famous copper-mining industrial city, Anhui. For our research goals, we have collected soil samples from 680 spots, and analyzed the total concentrations of Cd, Cu, As, Zn and Pb by using XRF, AAS, AFS, and other methods. Based on the statistics, we have found that the mean content of five heavy metals （Cd, Cu, As, Zn and Pb） in the southern hills is significantly higher than that in the northern plane area. The heavy metal accumulated contamination, especially, the content of Cd is prevalent in the southern exploration area. By using Nemerow pollution indexes and Kriging interpolation, we have found that the highest content of each heavy metal pollution in the samples amounts to heavy pollution level （ Pi 〉 1 ）, with the proportion of Cd and Cu contaminated area going up to 11.8 % and 2.8 %, respectively. The sequence of pollution indexes turns to be Cd 〉 Cu 〉 As 〉 Zn 〉 Pb. Thus, it can be concluded that the contaminated soil is centralized in the southern region under study. The pollution intensity of above five metals is correlated with the mining ore deposit distribution. Besides, Cd polluted soil is mainly distributed along the river side with high Cu content being found next to a smelting plant. Thus, it is believed that ore weathering, mining and extraction are the leading causes contributing to the soil heavy metal pollution in the study area.

关 键 词：地球化学 重金属污染评价 Nemerow综合指数法 Kfiging插值 铜陵 

分 类 号：X825[环境科学与工程—环境工程]