在抗氧金矿区土壤中的重金属积累风险和来源分析
Jianyang He1,2, Huimin Zhang1, Ke Yang1,2
1College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, Yunnan, China.
Scientific reports
|November 14, 2025
概括
反矿开采污染土壤重金属,造成生态和健康风险. 自然地质源对健康风险,特别是儿童的健康风险有很大影响,需要有针对性的整治工作.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 毒理学 毒理学 毒理学
背景情况:
- 反 (Sb) 采矿导致重金属的共同污染,威胁到土壤和人类健康.
- 缺乏Sb采矿区的定量来源分配和人口特异性风险评估.
研究的目的:
- 量化评估中国矿山矿区的重金属来源以及相关的生态和人类健康风险.
- 整合多种方法进行全面的污染评估.
主要方法:
- 源分配的正矩阵因数分解 (PMF).
- 蒙特卡罗模拟 (MCS) 用于风险概率.
- 地质积累指数 (Igeo),丰富系数 (EF),修改后的尼梅罗污染指数 (INI).
- 儿童和成人健康风险评估模型.
主要成果:
- 平均Sb度为125.61 mg·kg−1,是背景值的50倍,具有很高的空间可变性.
- PMF确定了区域混合 (36.8%),自然地质 (30.1%) 和工业点源 (33.1%).
- 对于Cd (94.43%) 和Sb (83.45%) 可能存在很高的生态风险.
- 儿童的非致癌风险 (HI>1) 有85.61%的概率;所有儿童,特别是儿童的总致癌风险都超过了值.
- 自然地质来源对儿童的风险做出了重大贡献 (57.9%致癌,62.3%非致癌).
结论:
- 由于重金属的共同污染,Sb矿区面临严重的生态和人类健康风险.
- 自然地质资源对健康风险起着至关重要的作用,特别是在儿童等弱势群体中.
- 紧急的,有针对性的污染控制和整治战略对于Sb矿区至关重要.
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