城市道路灰尘中的环境持久性自由基以及与过渡金属的关联
Kai Xiao1, Zedong Wang2, Yousong Zhou1
1College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China.
Environmental geochemistry and health
|July 24, 2023
概括
城市道路灰尘中的环境持久性自由基 (EPFR) 构成健康风险. 细尘颗粒含有更多的EPFR,它们与铁相关,表明暴露的潜在危险.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 化学 化学 化学
背景情况:
- 环境持久性自由基 (EPFR) 越来越令人担忧,因为它们可能对人类健康产生影响.
- 城市道路灰尘是空气污染的重要来源,也是潜在的健康风险.
- 关于EPFR特征和城市道路尘埃的形成的研究有限.
研究的目的:
- 调查城市道路灰尘中EPFR的发生和尺寸分布.
- 评估EPFR与道路灰尘中的过渡金属之间的关系.
- 评估与道路灰尘的EPFR暴露相关的健康风险.
主要方法:
- 从各种城市功能区域收集了道路灰尘样本.
- 使用电子磁共振 (EPR) 光谱分析了EPFR.
- 评估了EPFR和过渡金属 (如铁) 之间的相关性.
- 对摄入和皮肤暴露途径进行了健康风险评估.
主要成果:
- 在城市道路灰尘中检测到显著的EPFR度 (6.01 × 10^16 1.3 × 10^19 旋转/g).
- 主要在较细的尘埃颗粒中发现了EPFR.
- EPFR与总铁有显著的相关性,但与水溶性铁没有显著的相关性.
- 健康风险评估表明,通过摄入和皮肤暴露存在高潜在风险.
结论:
- 城市道路灰尘含有大量的EPFR,特别是细颗粒.
- 铁含量,特别是不溶性形式,与道路灰尘中的EPFR形成有关.
- 道路灰尘中的EPFR通过常见的暴露途径对健康构成相当大的风险.
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