Evaluation of heavy metal pollution in agricultural soils in coal mining areas based on multiple methods
In this study,the content characteristics of Cr,Cu,Mn,Ni,Pb and Zn in soils were analyzed in agricultural soils in the Luling mining area of Suzhou City.The embedded Igeo integrated pollution index method,the enrichment factor method and the Nemero integrated index method were used to evaluate the heavy metal pollution in soil.The results showed that the average content of all heavy metals in the study area except Pb was lower than the background value of soil in Anhui Province,and the average content of Pb exceeded the background value of soil in Anhui Province by 0.24 times,the exceedance rate was 100％,and the maximum exceedance multiple was 0.37.The evaluation results of the integrated index method embedded in Igeo showed that all sampling sites were lightly to moderately polluted;The evaluation results of the enrichment factor method show that 87.5％of the sampling points are at safe levels and 12.5％are moderately polluted;The evaluation results of the Nemero Composite Index method showed that 75％of the sampling sites were lightly polluted and 25％of the sampling sites were at the alert level.All three methods showed that Pb was the main enrichment element,but there was some variability in the degree of contamination.Therefore,a multi-method evaluation of soil heavy metal pollution is carried out to facilitate soil environmental protection and management.
Coal mining areaagricultural soilheavy metal pollution evaluation
NETL
NSTL
万方数据
