来自历史城市固体废物填埋场的城市土壤中的金属化物:地质化学,来源分配,生物可访问性测试和人类健康风险
Edgar Hiller1, Tomáš Faragó1, Martin Kolesár2
1Department of Geochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15 Bratislava, Slovak Republic.
Chemosphere
|June 22, 2024
概括
这项研究发现布拉迪斯拉瓦垃圾填埋场土壤中金属污染极高,对人类健康构成风险. 评估金属的生物可访问性对于在城市环境中准确评估风险至关重要.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 人类健康风险评估
背景情况:
- 管理不善的垃圾填埋场污染了土壤和水,影响了环境和人类健康.
- 城市地区的历史性城市固体废物 (MSW) 垃圾填埋场需要进行彻底的环境评估.
- 城市土壤中的金属 (loid) 污染引起了重大的生态和健康问题.
研究的目的:
- 为了调查布拉迪斯拉瓦历史性MSW垃圾填埋场土壤中的金属 (loid) 污染.
- 为了确定垃圾填埋场土壤中的金属 (loid) 的来源和生物可访问性.
- 评估与住宅区金属 (loid) 污染有关的人类健康风险.
主要方法:
- 使用地理积累指数 (Igeo) 分析金属 (loid) 度.
- 稳定的同位素比率分析以确定来源 (天然与人为).
- 使用BCR序列提取和地化学分离的金属 (loid) 的口服生物可访问性评估.
主要成果:
- 土壤表现出极高的Cd,Cu,Pb,Sb,Sn和Zn度 (Igeo> >5).土壤中的Cd,Cu,Pb,Sb,Sn和Zn度极高.
- 同位素比率表明自然和人为来源,包括MSW焚烧灰.
- 口服生物可访问性差异很大,Cd具有高度的生物可访问性;风险评估基于总度和生物可访问度的差异.
结论:
- 城市垃圾填埋场的土壤可能受到危险金属 (化物) 的严重污染.
- 地化学分化和矿物学表征是理解金属 (流体) 储库和生物可访问性的关键.
- 准确的人类健康风险评估需要考虑金属 (loid) 的生物可访问性,而不仅仅是总度.
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