摘要
基于浙江省永康市市域范围内7种土地利用类型的采样点共计203个,利用描述性统计分析、单因素评价分析、内梅罗综合污染指数、相关性分析、主成分分析和聚类分析等方法对研究区土壤表层重金属质量分数、污染程度和重金属相关关系及来源进行研究。结果表明:1永康市城市土壤表层重金属砷(As),钴(Co),铬(Cr),铜(Cu),锰(Mn),镍(Ni),铅(Pb),钛(Ti),钒(V),锌(Zn)的平均质量分数为6.57,10.57,119.55,22.978,528.51,22.45,37.67,5751.81,84.37,90.25 mg·kg^(-1);2研究区表层土壤均呈现为轻度及以上污染水平,重金属元素的平均单因素污染指数由大到小依次为铬>镍>钒>钴>钛>铜>锌>锰>铅>砷;平均内梅罗综合污染指数由高到低排序为工业用地>交通用地>公园绿地>住宅用地>林地>市政文教用地>耕地。3永康市城市土壤表层中铬、铜、镍、铅、锌元素主要来源与当地的五金制造业和交通运输,砷和钒主要来源于工业与自然成土过程中的元素积累,钴和钛主要来源于五金制造业。
To assess pollution characteristics and the degree of heavy metal pollution and to discuss their prob-able sources, the topsoil of Yongkang City was divided into seven zones based on a survey of the region. Alto-gether 203 urban soil samples were collected, and ten kinds of heavy metal elements were analyzed. Then asingle factor evaluation and the Nemerow integrated pollution index for different functional zones were em-ployed to investigate pollution characteristics of heavy metals. Also a multivariate statistical analysis was usedto analyze sample dates. Results showed that mean concentrations for heavy metals （in mg·kg-1） were As（6.57）, Co（10.57）, Cr（119.55）, Cu（22.97）, Mn（528.51）, Ni 22.45）, Pb（37.67）, fi（5 751.81）, V（84.37）,and Zn（90.25）. The single factor integrated pollution index for order of different heavy metals was Cr 〉 Ni 〉V 〉 Co 〉 Ti 〉 Cu 〉 Zn 〉 Mn 〉 Pb 〉 As, and the Nemerow integrated pollution index order was indus-trial zone ~ traffic zone ~ parkland zone ~ residential zone ~ woodland zone ~ municipal zone ~ culti-vated land. Results of the principal component analysis indicated that Cr, Cu, Ni, Pb, and Zn were mainly fromhardware manufacturing industry and local transportation; As and V came from industrial and natural soil form-ing processes; and Co and Ti mainly originated from hardware manufacturing industry. [ Ch, 2 fig. 8 tab. 22ref. ]
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2016年第3期427-433,共7页
Journal of Zhejiang A&F University
基金
浙江省重点科技创新团队项目(2011R50027)
关键词
环境污染与防治
重金属元素
城市土壤
主成分分析
永康市
environmental pollution and control
heavy metals
urban soils
principal component analysis
Yongkang City
