确定重金属化物的优先来源和风险评估在典型的矿区的农业土壤中的重金属化物
Lianhua Liu1, You Li2, Xiang Gu3
1Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Journal of environmental sciences (China)
|July 13, 2024
概括
在矿区确定重金属污染源至关重要. 煤炭采矿和炼活动对人类健康构成重大风险,而工业和农业活动则带来生态风险,需要有针对性的污染管理.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 风险评估 风险评估
背景情况:
- 农业土壤中的重金属 (HM) 污染是 (Sb) 矿区的主要环境问题.
- 鉴定污染源和了解环境风险是具有挑战性的,因为复杂的,共存的来源.
研究的目的:
- 区分污染源并评估Sb采矿流域中的人类健康风险 (HRR) 和生态风险 (ER).
- 评估综合受体模型在源鉴定和风险评估方面的有效性.
主要方法:
- 采用了一种综合方法,结合绝对主要组件得分-多重线性回归 (APCS-MLR) 和正矩阵因数分解 (PMF) 模型.
- 进行了生态风险 (ER) 和人类健康风险 (HHR) 评估以及来源分配.
主要成果:
- 无论是APCS-MLR还是PMF都确定了四个污染源;APCS-MLR的准确性更高.
- 自然来源是HM度的最大贡献者 (39.1%),其次是工业/农业活动 (23.0%),未知来源 (21.5%),以及Sb采矿/炼 (16.4%).
- 工业/农业活动是ER的主要驱动因素 (特别是Cd和Sb),而Sb采矿/炼活动是HHR (Sb和As) 主要的人为来源.
结论:
- 除了工业和农业活动外,矿和炼也是生态和健康威胁的关键来源.
- 集成的受体模型提供可靠的来源识别,并支持以来源为导向的风险管理.
- 建议包括规范采矿/炼和实施污染农业土壤的土壤整治.
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