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[在锡矿周围的农田土壤中重金属污染的评估和来源分析]

Zhe Zhang^1,2, Zhi-Bin Jia¹, Si-Yang Wu¹

¹Research Center for Prevention and Control of Heavy Metal Pollution, China Academy of Environmental Planning, Ministry of Ecology and Environment, Beijing 100012, China.

Huan jing ke xue= Huanjing kexue

|August 21, 2024

概括

在中国矿区附近的农田中重金属污染带来了重大风险,其中和显示出极端的污染. 采矿活动是主要来源,影响土壤健康和人类安全.

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:

矿区附近农业土壤中的重金属污染对生态恢复和保护构成风险.
了解污染状况和来源对于管理受污染的农田至关重要.

研究的目的:

评估重金属污染状况,分布,健康风险和中国西南部矿区周围农田土壤中的来源.
为采矿影响农田的生态恢复和保护战略提供数据.

主要方法:

在土壤样本中分析了八种重金属 (Cd,Hg,Pb,As,Cr,Zn,Ni,Cu).
污染指数的应用 (土地积累指数,综合污染指数).
使用 kriging 插值进行空间分布分析.
健康风险评估 (HRA) 和积极矩阵因子化 (PMF) 受体模型用于源分配.

主要成果:

七种重金属 (Ni除外) 的平均度超过了当地的背景值.
(Cd) 和 (Hg) 显示极端污染; (Pb) 和 (As) 显示中等到重污染.
口服是主要的暴露途径;As引起非致癌风险,而As和Cd带来致癌风险.

结论:

采矿区周围的农田土壤受到重金属的严重污染,主要来自采矿活动,工业来源和大气沉积.
和是健康风险的关键因素,需要有针对性的整治工作.
来源分配确定了采矿,工业活动和自然气候作为重金属污染的主要贡献者.

关键词:

农业用地农业用地农业用地评估健康风险评估健康风险土壤中的重金属.来源分配的分配方式锡 (((Sn) 矿石的矿石.

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