土壤—农作物系统中重金属元素地球化学特征及健康风险评价

王志强, 倪萍, 张宏绪, 石天池, 杨建锋, 张惠玲

Geochemical characteristics and health risk assessment of heavy metals in soil-crop systems

WANG Zhi-Qiang, NI Ping, ZHANG Hong-Xu, SHI Tian-Chi, YANG Jian-Feng, ZHANG Hui-Ling

表4 金属元素参考剂量和斜率致癌因子系数[12]

Table 4 Metal element reference dose and slope carcinogenic factor coefficient

重金属 RfDi SFi Cr 2.86×10-5 4.2 Cd 2.55×10-5 Hg 8.57×10-5 As 3.01×10-4 15.1 Pb 3.52×10-4