Risk Grade Assessment of Heavy Metals in Urban Topsoil

This paper get visually the spatial distribution of Heavy Metal pollution elements of Hg,Cu,Zn,Cr,Pb,Cd and Ni in different areas(living area,industrial area,mountainous areas,traffic area,parks and green areas) by programming using MATLAB.And obtain the pollution condition of all the areas by graphing the Heavy Metal concentration in the same area.In order to explain theoretically,this paper calculates the content of the soil pollution factors by the single-factor index method,and obtain the integrated pollution index in turn (3.1706,13.1887,1.2735,9.3696,2.7003) by Nemerow integrated pollution index method by quantitatively analysis about pollution levers of the different regions,and then determine the major pollution source of heavy metals in the city.We can assess that the overall soil quahty status to be more scientific and comprehensive of the region.