Department of Primary Education, Normal College of Jishou University, Jishou 416000, China.
College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
Int J Environ Res Public Health. 2022 Apr 13;19(8):4694. doi: 10.3390/ijerph19084694.
In China, the environmental capacity problem of heavy metals has long been hidden in the Pearl River Basin creating a contradiction between the economic development and environmental health. Thus, this research calculated the environmental capacity of heavy metals in the agricultural land of the urban agglomeration in the Pearl River Basin, evaluated the health risk warning capacity using a comprehensive index. The results showed that the static capacity order of heavy metals in the study area was As > Pb > Zn > Cr > Hg > Cu > Ni > Cd. The dynamic capacity showed an upward trend, and it fluctuated in some cities. The remaining capacity of Cr and Ni was relatively poor, and the comprehensive soil quality index of the Pearl River Basin was 0.64. The pollution level was of grade IV, which belongs to the medium capacity, but the soil pollution risk still existed, which threaten the health of local resident. In this regard, this study also put forward some countermeasures for pollution control. Thus, studying the soil heavy metal environmental capacity can provide a reference for heavy metal pollution control and health risk early warning in the Pearl River Basin.
在中国，重金属的环境容量问题长期以来一直隐藏在珠江流域，造成经济发展与环境健康之间的矛盾。因此，本研究计算了珠江流域城市群农业用地的重金属环境容量，并用综合指数评估了健康风险预警能力。结果表明，研究区重金属的静态容量顺序为 As > Pb > Zn > Cr > Hg > Cu > Ni > Cd。动态容量呈上升趋势，部分城市波动较大。Cr 和 Ni 的剩余容量较差，珠江流域综合土壤质量指数为 0.64。污染水平为四级，属于中等容量，但土壤污染风险仍然存在，威胁当地居民的健康。对此，本研究还提出了一些污染控制对策。因此，研究土壤重金属环境容量可为珠江流域重金属污染控制和健康风险预警提供参考。
