揭露被忽视的威胁:在地质污染的地土壤中对潜在有毒元素的概率风险评估
Yubo Wen1, Jie Li2, Wenbing Ji3
1School of Geographical Science, Nantong University, Nantong 226019, PR China.
Ecotoxicology and environmental safety
|February 12, 2026
概括
石灰岩土壤中的潜在有毒元素 (PTEs) 构成健康风险, (Cd) 在考虑生物可用性时比以前认为的风险更高. 土壤类型和pH值显著影响PTE风险.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 土壤科学 土壤科学
背景情况:
- 石灰岩土壤从母岩气候变化中积聚潜在的有毒元素 (PTEs),导致地质污染.
- 现有的风险评估往往忽略了PTE生物可用性,假设惰性成分带来最小的风险.
研究的目的:
- 评估PTE特征,生物可用性和沙地土壤的健康风险.
- 根据总度与生物可用性进行风险比较.
- 确定影响PTE生物利用率和风险的关键因素.
主要方法:
- 对6467个土壤样本进行PTE分析.
- 蒙特卡洛模拟用于概率健康风险评估.
- 生物可用性评估和敏感性分析.
主要成果:
- 在许多样本中, (Cr), (As) 和 (Cd) 的度超过了背景水平.
- 基于生物利用性的评估发现Cd比As具有更高的风险,这与总度评估相反.
- 土壤pH是生物可用性的主要驱动因素,而酸性土壤 (Acrisols,Anthrosols) 显示出更高的风险.
结论:
- 总PTE度评估可能会高估风险;必须包括生物可用性.
- 风险门应该是特定于土壤类型的,考虑pH等因素.
- 优先考虑Cd管理对于地农业战略至关重要.
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