Spatial Distribution Of Heavy Metals In Urban Dust From Jinhua

In the fields of urban environmental study, researches on the atmospheric particles, soil and water receive a lot of concern. Compared with the atmospheric particles and soil, urban dust study involving special environmental information and indication effect and it is characterized with wide distribution, convenient sampling and close relation with nonpoint source pollution. That researching dust pollution in the city, especially in the heavy metal pollution of urban dust, can been studied with the other environmental medium in city, reflect the regional environment in the overall situation of heavy metal. Research on heavy metal pollution of urban dust can be seen as a new breakthrough point for eco-environmental research of city.I In this paper, the heavy metal of urban dust of Jinhua have been studied. As to measure and analyze the spatial distribution of heavy metal in urban dust, the similarity of spatial distribution of heavy metal in urban dust, qualitative analysis and quantitative research methods are be used in combination. According to the correlation and similarity between heavy metal, homologous pollution of heavy metal can been preliminarily analyzed. The results of the research are as follows:(1) The similarity coefficient of spatial distribution of heavy metal element of dust in Jinhua urban aera is calculated by fuzzy numerical method. The results show that the spatial distribution of Pb, Cu, Cr, Mn, Zn, Ni have some similarity, where the similarity of Pb, Cu, Cr is larger and the similarity of Mn, Zn, Ni is smaller; the spatial distribution of Cu, Cr, Mn, Zn, Ni have some similarity, where the similarity of Cu, Cr is larger and the similarity of Mn, Zn, Ni is smaller; the spatial distribution of Cr, Mn, Zn, Ni have some similarity, where the similarity of Mn, Zn, Ni is smaller; the spatial distribution of Mn, Zn, Ni have some similarity, where the similarity of Mn, Zn is larger and the similarity of Mn, Ni is smaller; the spatial distribution of Zn, Ni have some similarity where the similarity of Zn, Ni is smaller.(2) The contrast map of spatial distribution of heavy metal element of dust in Jinhua urban aera is calculated by fuzzy numerical method. The result shows that the regions of the same similarity of Pb, Cu, Cr, Mn, Zn, Ni:Pb and Cu in the Northeast region, partial middle east region, Midwest regiona; Pb and Cr in the central region, partial central eastern region, partial central western region, partial central southern region, northeast region, eastern region, southeast region, southern region, southwest region, west region, northwest region; Pb and Mn in the southwestern region; Pb and Zn in the northeast region, the southwest region; Pb and Ni in the southwest region; Cu and Cr in the central region, southeast region, the southern region, southwest region and the northwest region; Cu and Mn in the Northwest region; Cu and Zn in the northern region, eastern region, the southern region and western region; Cu and Ni in the Northeast region; Cr and Mn in the central region and northern region; Cr and Zn in the Northeast region; Cr and Ni in the southwest region and the southeastern region; Mn and Zn in the central region, the northern region, Southwest region and the northwest region; Mn and Ni in the southwest region; Zn and Ni in the northeast region.3) According to contast map of spatial distribution of heavy metal of dust in Jinhua urban area, the correlation between heavy metals and the same similarity of spatial distribution of heavy metal, homologous pollution of heavy metal can be concluded. The result shows that Pb, Cu, Cr, Mn, Zn, Ni comes from automobile exhaust, garbage incineration and civil dust. This notes that there is wide heavy metal pollution in Jinhua.