Heavy Metals Distribution Characteristics and Pollution Assessment in Pear Soils of Dangshan,Anhui Province
Dangshan pear orchard in Anhui Province was used as the study area to determine the content of soil heavy metal ele-ments Cd,Hg,Cu,Zn,As,Pb,and Cr,the pollution evaluation was carried out by using the single-factor pollution index method,the Nemerow comprehensive pollution index method,and the potential ecological hazard index method.The results showed that the Cd,Cu,Zn and As content in the soil of Dangshan pear orchard exceeded the background value of the soil in Anhui Province,the Hg and Cr content was basically the same as the background value,and the Pb content was less than the background value;compared with the orchards of other regions in China,the Cu content was higher,the Cd,As and Cr con-tent was moderate,and the Hg,Zn and Pb content was lower.Evaluated with the background value of soil in Anhui Province,except for Pb,the single-factor pollution index of the remaining heavy metal elements were close to 1 or greater than 1,with most of the pollution ratios above 40％,and the Nemerow integrated pollution index was 1.54,reaching the mild pollution lev-el,and the combined potential ecological hazard index is medium potential ecological risk.Evaluating the screening value of soil pollution risk of agricultural land,the single-factor pollution index of each heavy metal element is less than 1,and the Nemer-ow comprehensive pollution index is 0.33,which is a clean and uncontaminated level,and the potential ecological hazards as a whole are characterized by low potential ecological risks.
Dangshan pear orchardsoil heavy metalsdistribution characteristicspollution evaluation
万方数据
维普
