城市社区花园中的金属度和生物可访问性对人类暴露的影响
Elmira Ramazanova1, Manvitha Marni1, Roger Wong2,3
1Department of Energy, Environmental and Chemical Engineering, Washington University, St. Louis, MO, 63130, USA.
Environmental geochemistry and health
|February 16, 2026
概括
(Pb) 是圣路易斯社区花园的一个问题,一些地块超过了安全水平. 然而,的生物可访问性很低,这限制了意外食用土壤对健康的风险.
科学领域:
- 环境科学 环境科学
- 公共卫生 公共卫生
- 城市生态城市生态学
背景情况:
- 城市农业的扩张增加了对土壤污染物的潜在暴露.
- 密苏里州圣路易斯的社区花园位于具有历史金属污染的地区,特别是 (Pb).
- 了解土壤污染和金属/金属化物暴露对于园丁健康至关重要.
研究的目的:
- 评估圣路易斯社区花园土壤中的金属/金属化物度和Pb生物可访问性.
- 调查空间变化和影响土壤污染的因素,如花园年龄.
- 通过调查收集关于园丁实践和暴露参数的数据.
主要方法:
- 在20个社区花园的土壤中测量了11种金属/金属化物 (包括Pb,As,Cd) 的总度.
- 在土壤样本中评估了体外 (Pb) 的生物可访问性.
- 对社区园丁进行调查,以了解他们的习惯和暴露.
主要成果:
- (Pb) 被确定为一种令人担忧的金属,21%的地块超过了推的花园土壤值.
- 实验室内Pb的生物可用性低 (<5.4%),这表明在意外摄入时生物可用性有限.
- 土壤金属度在花园内空间不同;Pb和 (As) 度与花园年龄正相关.
结论:
- 圣路易斯社区花园土壤由于 (Pb) 度存在潜在风险,尽管生物可访问性有限.
- 空间变化和花园年龄是土壤采样和风险评估的重要考虑因素.
- 结果为改善土壤采样策略,暴露评估和城市农业污染减缓提供了信息.
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