水土保持通报2017，Vol.37Issue(1)：34-39,6.DOI:10.13961/j.cnki.stbctb.2017.01.006
西安市汽车站地表灰尘中重金属的污染评价及其来源识别
Assessment of Heavy Metal Pollution and Source Identification in Surface Dust at Urban Coach Stations in Xi'an City
摘要
Abstract
[Objective] The objective of the study is to investigate heavy metal pollution and possible sources of heavy metals in surface dust in coach stations of Xi'an City,in order to provide support for improving the environment in coach stations of Xi'an City.[Methods] Dust samples were collected from 20 representative coach stations in Xi'an City and the concentrations of Cu,Mn,Ni,Pb,V,and Zn were measured by X-Ray fluorescence spectroscopy.Pollution level and environmental risk of heavy metals in the dust were assessed using the geo-accumulation pollution index and the potentially ecological risk index,respectively.Correlation coefficient analysis,principal component analysis and cluster analysis were used to identify the possible sources of these heavy metals.[Results] The mean content of Cu,Pb and Zn in the dust was 36.3,107.7 and 113.5 mg/kg,respectively,which were significantly higher than their background values in soil in Shaanxi.The geo-accumulation index results indicated that the pollution level of Pb was medium,while other heavy metal pollution belonged to low-level.The potentially ecological risk index showed that the surface dust from coach stations was moderately polluted,and have medium ecological risk.[Conclusion]Source identification results suggest that Cu,Mn and Ni in the surface dust mainly came from nature and traffic,Pb and Zn mainly came from automobile exhaust emissions and worn-out parts,and V mainly came from the nature.关键词
汽车站/地表灰尘/重金属/多元统计分析/潜在生态风险指数Key words
coach station/surface dust/heavy metal/multivariate statistical analysis/potentially ecological risk index.分类
资源环境引用本文复制引用
田东凡,卢新卫,景一鸣,张蒙,罗润..西安市汽车站地表灰尘中重金属的污染评价及其来源识别[J].水土保持通报,2017,37(1):34-39,6.基金项目
国家自然科学基金项目“冶炼焦电工业区重金属与PAHs污染特征及人群健康风险研究”(41271510) （41271510）
大学生创新创业训练计划项目(cx15041) （cx15041）
