Solid/solution partitioning and speciation of heavy metals in the contaminated agricultural soils around a copper mine in eastern Nanjing city, China

摘要: Abstract Solid/solution partition coefficient ( K d ) and speciation of soil heavy metals can be used for predicting their environmental risks. The values solution Cu, Cd Zn were analyzed in 40 samples contaminated agricultural soils around Jiuhua copper mine eastern Nanjing city, China. ranges (and mean values) are 703–7418 (3453), 37.3–3963 (940) 319–17 965 (7244) L kg −1 , respectively, showing a large variability both soils. results differential pulse anodic stripping voltammetry (DPASV) indicates that 95.6% Cu is bound to dissolved organic ligands. About half the DPASV-labile at pH   6. ranged from 22.6 98.7% with value 56.3%. Multiple linear regressions indicate concentrations mostly influenced by pH R 2 0.50, 0.59 0.63, respectively Cd, 0.58, 0.72 0.64, Zn. Considering second parameter corresponding metal, relationships improved 0.70 0.73 Zn, respectively. However, solubility was insensitive pH. Only SOC shows weak relationship 0.21. As its total most significant factor. But no parameters found good predictors.