摘要
以石羊河流域典型工业区土壤为对象,研究了土壤中重金属污染的状况和特征,用富集系数进行了评价和分析。结果表明:研究区土壤重金属已受到严重污染,污染最重的Ni、Co、Cu的浓度以冶炼厂为中心呈扇形分布,距离越远,浓度越小。污染程度与研究区的气象条件有很大的关系,下风向污染程度大,背风向小。其污染程度顺序为:Ni>Co>Cu>Cd>As>Hg>Cr。污染源的空间差异性引起不同功能区土壤中重金属元素的含量不同,不同功能区达到生态危害程度的顺序依次为:农业土壤>工业土壤>住宅土壤。石羊河流域典型工业区土壤中存在着潜在的化学定时炸弹,多年来研究区大气中二氧化硫浓度居高不下,二者协同作用的结果,增加了起爆的危险性。
This research adopted enrichment coefficient method with the typical industrial districts in Shi Yang River Basin as research objects to appraise and analyze the pollution situation and character of heavy metal in soil. The results indicated that the soil in the studied area was seriously polluted and the top heavy metal pollution was Ni, Co and Cu. The concentrations of these heavy metal were distributed in a fan -shaped section with the smelting plant as center. The longer distance and the lower concentration. There were close relationships between the pollution status and the weather conditions in the studied area： heavy polluting on down wind lane and light polluting in the leeward side. The pollutions were ordered as follows ： Ni 〉 Co 〉 Cu 〉 Cd 〉 As 〉 Hg 〉 Cr. The differences of heavy metal contents in the function area＇s soils were caused by the pollution source of spatial in homogeneity. The function areas which reached to ecological harm extent were ordered as follows： agricultural soils 〉 industrial soils 〉 residential soils. There were potential chemical time bombs in soils of Shi Yang River Basin and in the several years the sulfur dioxide concentration sticks at a high level in atmosphere. Their synergistic effect was responsible for the increasing risks of explosion.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2008年第9期129-133,共5页
Journal of Arid Land Resources and Environment
基金
中国科学院知识创新工程重大项目(编号:KZCX1-10-03-01)
中国科学院知识创新项目(编号:KZCX01-09)
中国科学院寒区旱区环境与工程研究所知识创新项目(编号:CACX210036和CACX210016)资助
关键词
石羊河流域
重金属
污染
富集系数
土壤类型
Shi Yang River Basin
heavy metal
pollution
enrichment coefficient
soil types
