城市表层土壤重金属污染风险等级评价

利用MATLAB软件编写程序作图,直观得到重金属污染元素Hg,Cu,Zn,Cr,Pb,Cd,Ni,As在不同区域(生活区、工业区、山区、主干道路、公园绿地区)的空间分布,并且对同一区域各种重金属的含量浓度作图,直观得出了各个区的污染情况.为了从理论上进行说明,利用单因子指数法计算出土壤中各项污染因子的含量,然后用尼梅罗综合污染指数法对不同区域的污染程度进行定量分析,得出生活区、工业区、山区、主干道路、公园绿地区的综合污染指数依次为(3.1706,13.1887,1.2735,9.3696,2.7003),从而确定了某城区重金属的主要污染源.以此能够更为科学、综合的评价该区域内总体土壤质量状况.

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.