The characteristics of heavy metal accumulation in earthworms in the vicinities of the coal waste rock piles in Huainan
Abstract：Aiming to investigate the characteristics of heavy metal accumulation in earthworms around coal waste rock piles, some earthworm samples were collected from the vicinities of coal waste rock piles of different ages in Huainan. The concentration of Zn, Pb, Cd, Ni, Cr, V, Cu in earthworms and soils were analyzed by ICP-OES. The results show that the concentration of Pb, Cd, Cu in earthworm increases with the increased accumulation time of coal waste rock pile, while the concentration of Ni, Cr, V in earthworm increases first then decreases with the increased accumulation time. However, the concentration of Zn in the earthworm appeares no significant trend with the accumulation time changing. Through the analysis of correlation and regression, the concentrations of Zn and Cd in earthworms can accu- rately indicate the corresponding concentration of Zn and Cd in soils, while the concentration of Ni, Cr, V can denote the distance between the earthworm sampling site and the coal waste rock pile. As the bioconcentration factors of Zn and Cd in earthworms are higher than 1, and the bioconcentration factors of Cd is the highest, it manifests that the earthworms can accumulate Zn and Cd in soils. Therefore, earthworms can be used as a biological indicator of Cd and Zn in soils in the vicinity of coal waste rock pile.
Keywords：coal waste rock pilesoilearthwormheavy metalbioconcentration factor
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 1219-1226 )