典型的工业工厂的微粒物质的毒性潜力通过金属溶解与酸度的介导
Xiwen Song1, Di Wu1, Xiu Chen1
1Department of Environmental Science and Engineering, Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Fudan University, Shanghai 200433, China.
Environmental science & technology
|April 2, 2024
概括
颗粒物 (PM) 酸度显著增加其毒性. 较低的pH值可以增强PM.
科学领域:
- 环境科学 环境科学
- 毒理学 毒理学 毒理学
- 大气化学 大气化学
背景情况:
- 颗粒物 (PM) 酸度是大气的一个关键性质.
- 颗粒酸度与其毒性之间的联系尚不清楚.
研究的目的:
- 量化评估酸度对颗粒物毒性的影响.
- 调查酸度影响颗粒物毒性的机制.
主要方法:
- 控制的实验室实验操纵PM酸度 (pH控制).
- 细胞分析以测量氧化应激和细胞毒性.
- 分析水溶性金属含量和与毒性的相关性.
主要成果:
- 酸性PM (pH 1-2) 的氧化压力是2.8-5.2倍,细胞毒性是2.1-13.2倍,比较不那么酸性PM (pH 8-11) 高.
- 在pH 2.3的真实世界烟雾中,PM的毒性是pH 5.6的PM的9.1-18.2倍.
- 酸性促进金属溶解,使水溶性金属的数量增加了2-3个数量级,这与毒性相关.
结论:
- 微粒酸度显著提高其毒性,主要是通过增加金属的溶解.
- 硫酸酸盐可能通过溶解不溶性金属来增强颗粒物毒性.
- 控制湿烟雾排放对于减轻PM的不良健康影响至关重要.
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