泉州市街道灰尘中重金属来源分析

Source Analysis of Heavy Metals in the Street Dust of Quanzhou City

用ICP-MS测定了泉州市不同功能区街道灰尘中11种重金属元素(Cr、Fe、Mn、Ni、Cu、Zn、Cd、Sb、Pb、Bi、Co)的含量。结果表明,上述元素的平均含量均高于当地土壤背景值,尤以Zn、Cd、Sb、Pb富集较严重。多元统计分析(相关分析、因子分析、聚类分析)结果显示,泉州市街道灰尘中上述重金属来源可分为三大类:Cu、Pb、Sb、Cd、Bi主要来自机械加工和交通污染;Mn、Zn主要来自农药喷洒和生活污染;Fe、Cr、Ni、Co则主要来自钢铁工业污染和自然源。

The contents of 11heavy metals（Cr,Fe,Mn,Ni,Cu,Zn,Cd,Sb,Pb,Bi and Co）in the street dust samples collected from different functional areas of Quanzhou City were analyzed by inductively coupled plasma mass spectrometry（ICPMS）.The results show that the average contents of the above elements are all beyond the local soil background values,and Zn, Cd,Sb and Pb are seriously enriched.The results of multivariate statistical analysis（correlation analysis,component analysis and cluster analysis）indicate that the heavy metals in the urban street dust of Quanzhou City can be classified as three groups： Cu,Pb,Sb,Cd and Bi,mainly from machining operations and traffic pollution;Mn and Zn,mainly from pesticides and life pollution;and Fe,Cr,Ni and Co,mainly from iron-steel industrial pollution and natural sources.