[科尔拉绿洲地区土壤中重金属和化物污染的来源分析和风险评估]
Wen-Wen Shi1, Jun-Ling He1,2, Peng-Wei Zhang1
1Urumqi Natural Resources Integrated Survey Center of China Geological Survey, Urumqi 830057, China.
Huan jing ke xue= Huanjing kexue
|September 17, 2025
概括
科尔拉绿洲土壤中的重金属和化物显示高水平的 (Cd) 和 (F),其中是主要污染物. 健康风险一般较低,但对儿童来说更高,强调需要集中注意力.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 环境健康 环境健康
背景情况:
- 土壤受到重金属和化物的污染对生态系统和人类健康构成风险.
- 科尔拉绿洲地区面临来自各种来源的潜在污染,需要对土壤质量进行评估.
研究的目的:
- 调查科尔拉绿洲土壤中重金属和化物的污染状况,来源和健康风险.
- 分析土壤污染物的空间分布和生态风险.
- 量化与土壤重金属和化物暴露相关的健康风险.
主要方法:
- 收集和分析6180个土壤样本,检测八种重金属 (As, Cu, Cr, Pb, Hg, Ni, Zn, Cd) 和化物 (F).
- 使用土地积累指数和潜在的生态风险指数方法评估潜在的生态风险.
- 使用正定矩阵因子化 (PMF) 建模和通过蒙特卡洛模拟评估健康风险的来源分配.
主要成果:
- 检测到高水平的Cd,Ni,Pb,As,Cr和F,超过了背景值;Cd和F显示高缩.
- 空间分布模式各不相同,有些元素呈现了外围分布,而另一些则呈现了点状或切片状分布.
- 总体而言,土壤污染很低,以Cd为主,生态风险组合较低,尽管Cd和Hg是主要的贡献者.
结论:
- 确定了四个主要来源:工业 (Cd),混合农业工业 (As,Hg,Ni),大气降水 (Pb,Cr) 和自然农业 (F).
- 生态风险热点是局部的,而冷点在北部地区.
- 健康风险通常是可以容忍的,但儿童面临某些重金属和化物的更高风险,需要注意.
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