贵州典型重金属高背景区耕地土壤重金属生态风险评价

王惠艳, 彭敏, 马宏宏, 张富贵

Ecological risk assessment of cultivated land in typical areas with high heavy metal background values in Guizhou Province

WANG Hui-Yan, PENG Min, MA Hong-Hong, ZHANG Fu-Gui

表4 重金属元素各组分形态赋存比例

Table 4 Proportion of different morphology occurrence of heavy metals

形态 占比/% As Cd Pb Zn Cu 生物有效组分 水溶态+离子交换态+ 碳酸盐结合态 2.76 66.07 7.51 9.58 1.11 潜在生物有效组分 腐殖酸结合态+铁锰 结合态+强有机结合态 15.44 28.96 55.10 28.18 21.32 残渣态 81.70 4.97 37.39 62.23 77.57