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在中国31个主要城市的环境颗粒成分和毒性

Lu Zhang¹, Maosheng Yao¹

¹State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.

Fundamental research

|June 27, 2024

概括

颗粒物 (PM) 毒性在中国各城市有很大差异,受真菌和硫酸盐等成分的影响. 目前仅以质量水平为基础的空气质量评估忽略了这些对有效健康策略至关重要的毒性差异.

科学领域:

环境科学环境科学
毒理学毒理学毒理学
公共卫生公共卫生

背景情况:

目前的空气质量评估依赖于颗粒物质量 (PM),忽略了毒性变化.
有效的污染控制需要了解PM的健康影响,而不仅仅是单纯的度.

研究的目的:

调查中国31个主要城市的PM的成分和毒性.
为了将PM成分与毒性相关联,并确定对健康风险的关键贡献者.

主要方法:

在全国范围内收集了465个汽车空调过器.
通过dithiothreitol (DTT) 测定和通过limulus amebocyte lysate (LAL) 测定评估PM毒性和内毒素水平.
使用qPCR和其他方法量化化学 (离子,元素) 和生物 (真菌,细菌) 成分.

主要成果:

在不同城市中,正常化PM毒性 (NIOG) 变化高达6.5倍,与PM10,真菌,硫酸盐 (SO4 ^ 2),有显著的相关性.
内毒素度差异很大,细菌/真菌水平显示出10-100倍的差异.
颗粒物化学和生物成分与气象因素和像SO2这样的气体污染物相关.

结论:

在中国各个城市中,颗粒物毒性的差异很大,需要超越大规模评估.
菌和硫酸盐 (SO4^2-) 被确定为导致PM毒性的关键因素.
包含毒性因素的城市特定空气污染控制策略对于最大限度地提高健康和经济效益至关重要.

关键词:

生物制品是一种生物制品.化学元件化学元件化学元件最后毒素 (Endotoxin) 是一种内毒素.有氧化潜力可能存在.颗粒物毒性颗粒物毒性

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