在南非,PFAS对地下水的风险在哪里最高?
Environmental pollution (Barking, Essex : 1987)
|December 6, 2025
概括
南非 南非 南非
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 水资源管理 水资源管理
背景情况:
- 地下水是南非缺水地区的关键资源.
- 人为污染,特别是来自持久的Per-和多基物质 (PFAS),构成重大威胁.
- 在南非水源中检测到PFAS,通常超过安全饮用限值.
研究的目的:
- 评估南非各地地下水受到Per-和多基物质 (PFAS) 污染的脆弱性.
- 适应和应用修改后的DRASTIC方法 (DRASTIL),将土地利用纳入改进的空间评估.
- 确定需要针对地下水保护的有针对性的管理策略的高风险地区.
主要方法:
- 通过整合七个水文地质和土地利用参数,开发了一种修改后的DRASTIC方法 (DRASTIL).
- 使用地理信息系统 (GIS) 进行了加权覆盖分析.
- 该模型使用现有的表面和地下水中的Per-和多基物质 (PFAS) 测量进行了校准.
主要成果:
- 超过36%的南非地区被归类为中度至极度高风险的Per-和多基物质 (PFAS) 地下水污染.
- 西开普省 (特别是开普敦),自由州,西北和高省由于城市,农业和采矿影响而表现出高度脆弱性.
- 高省有超过60%的面积处于高风险类别,尽管面积小.
结论:
- 南非地下水的很大一部分容易受到Per和多基物质 (PFAS) 的污染.
- 在确定的高风险地区,迫切需要有针对性的监测和管理策略.
- 保护南非重要的地下水资源免受Per-和多基物质 (PFAS) 污染至关重要.
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