Analysis of Characteristics of Heavy Metal Accumulation in Soil and Crops in Industrial Agglomeration Zone
In order to systematically study on heavy metal pollution in soil and crops in industrial agglomeration area,the heavy metal content of soil and crops wheat in different directions and distances of industrial agglomeration area were determined and analyzed by single factor pollution index,Nemerow pollution index(NPI)and bioconcentration factors methods.The results showed that the heavy metal pollution of soil and crops wheat in the industrial agglomeration area were serious(NPI>2).Within the influence range of 5 km from the industrial agglomeration area,except for mercury(Hg),plumbum(Pb)and zinc(Zn),other heavy metals were relatively serious(NPI>1),the heavy metal pollution outside the 5 km range was relatively light(NPI<1).In addition,there were significant correlation between heavy metal content in crops and soil,among which cadmium(Cd),mercury(Hg),plumbum(Pb),nickel(Ni)and arsenic(As)in wheat grains were positively correlated with soil heavy metals,with correlation coefficients of 0.484,0.409,0.018,0.679 and 0.480,respectively,while chromium(Cr)in grains were negatively correlated with soil heavy metals with a correlation coefficient of-0.133.The results indicated that wheat should not be planted in the industrial agglomeration area,and crops(wheat)planted within 5 km from the industrial agglomeration area only could be consumed as grains.Crops(wheat)production could be safely carried out 5 km away from the industrial agglomeration area.
industrial agglomeration zoneheavy metal pollutionsoil pollutioncrops
国家科技期刊平台
NSTL
万方数据
