Accumulation and Health Risk Assessment of Heavy Metal(loid)s in Soil-Crop Systems from Central Guizhou, Southwest China

Heavy metal(loid)s (HMs) contamination in agricultural soil and crops is related to the quality safety of products public health has attracted worldwide attention. This study systematically investigated bioaccumulation HMs including Cd, Pb, Cr, Hg, As Se associated (Tea, Plum Corn) Guizhou Province, China, assessed risks edible part using bioconcentration factor (BCF), geoaccumulation index (Igeo), target hazard quotient (THQ). The results indicate that mean concentrations Pb (39.54 ± 16.56 mg/kg), Cr (122.50 33.36 Hg (0.26 0.33 (25.40 21.34 (0.90 0.46 mg/kg) cultivated exceed background values Province by 1.12, 1.28, 2.36, 1.27, 2.4 times, respectively. However, average concentration Cd 0.49 mg/kg, which lower than corresponding value. Igeo samples were 1, indicating a relatively low degree enrichment, whereas enrichment was obvious, as approximately 32.9% at moderate above levels. contents corn, plum, tea pollutant limit. BCF three high, strong migration ability, soil-crop system higher those corn plum. Correlation analysis showed pH K2O, Fe2O3, Al2O3 negatively correlated with system, they affected macro-oxidation soil, basically not affected. human risk assessment THQ demonstrated local residents from eating drinking low.