摘要
利用多元统计分析和空间分析相结合的方法,分析了首钢地区表层土壤中Fe、Cr、Ni、V、As、Cd、Pb、Cu、Zn、Hg 10种重金属元素的地球化学特征。研究结果表明,10种元素可以归结为4类:第一类Ni、V、As的含量低于自然背景值,主要受成土母质等自然因素的影响;第二类Cd、Cu、Pb、Zn的含量已经超出自然背景值,其中Cu、Pb、Zn属于轻度污染,Cd属于中度污染,这一类元素主要受到交通和冶炼等人为因素的影响,高值区主要分布于居民区;第三类为Fe、Cr,同时受到自然因素和人为因素的共同影响,高值区集中分布在厂区和部分居民区;第四类为Hg,Hg因其是一种非点源污染的元素而单独聚为一类,主要受到人为因素的影响且高值样点位于河流区。总体而言,首钢地区表层土壤已经受到部分污染,需密切关注其对环境的危害及人群的潜在健康风险。本研究对该区域土壤污染风险评价和土地利用规划等具有一定的借鉴意义。
The concentration of Fe,Cr,Ni,V,As,Cd,Pb,Cu,Zn,Hg were investigated for 400 topsoil samples collected from Capital Steel Factory.The results of cluster analysis and the principal component analysis showed that the heavy metals can be mainly divided into four groups.The first group included Ni,V,As,and their mean concentrations were lower than that of the nature background.They may be primarily controlled by natural sources such as soils parent materials.The second group included Cd,Cu,Pb,Zn,and mean concentrations exceeded the nature background values.They may be derived from the anthropogenic sources,particularly traffic and smelter.The PI-analyzing results showed that the soil was lightly polluted by Cu,Pb,Zn and were moderately polluted by Cd with the hotspots located in residential area.The third group were Fe and Cr,and the highest concentrations of them distributed in industrial area and partial residential area.They may be mainly affected by natural sources and anthropogenic sources.The fourth group was Hg with the features of non-point sources associated with human activities.The highest concentration distributed in river area.In general,attention should be paid to the subsequently environmental damage and potential human health risk in this area because parts of the topsoil were polluted by the heavy metals.Our study provides a significant reference for soil pollution risk assessment and land-using plan of Capital Steel Factory in the future.
出处
《现代地质》
CAS
CSCD
北大核心
2012年第5期963-971,共9页
Geoscience
基金
中央高校基本科研专项基金项目(2010ZY24
2011YXL017
2011YYL136)
高等学校博士学科点专项科研基金项目(20090022120001)
关键词
首钢
重金属
土壤污染
自然因素
人为因素
Capital Steel Factory
heavy metal
soil contamination
natural source
anthropogenic source
