环境空气和内部来源对公共交通方式中的多种空气污染物的相对贡献
Zhiyuan Li1, Wenwei Che2, Md Shakhaoat Hossain3
1School of Public Health (Shenzhen), Sun Yat-sen University, Guangzhou, 510275, China; Division of Environment and Sustainability, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
通勤者在公共交通中面临高空气污染. 这项研究量化了香港交通中的外部空气和内部来源的污染,揭示了大众运输铁路 (MTR) 的内部颗粒物物质贡献最高.
科学领域:
- 环境科学 环境科学
- 公共卫生 公共卫生
- 大气化学 大气化学
背景情况:
- 通勤者在运输微环境 (TME) 中暴露于空气污染物.
- 之前的研究主要评估了污染物度,仅限于对环境与内部来源的区分.
- 了解这些来源对于制定有效的减少城市交通中的暴露策略至关重要.
研究的目的:
- 量化环境空气和内部来源对香港TME颗粒物 (PM) 和气态污染物度的贡献.
- 为了比较不同公共交通方式的污染物水平和来源贡献.
主要方法:
- 通过使用便携式空气质量监测器在香港TME进行了采样活动 (2018年7月和11月).
- 测量了PM (PM1,PM2.5,PM10) 和气体污染物 (CO,NO,NO2) 的度.
- 量化颗粒物透量和每个TME的内部来源的估计贡献.
主要成果:
- 双层公共汽车的PM度最低,但CO,NO和NO2水平较高.
- 大众交通铁路 (MTR) 地铁系统呈现出高PM2.5/PM10比率 (约. 0.90) 和最大的PM的内部来源贡献.
- 与公共汽车和小型巴士相比,MTR的颗粒物透系数 (<0.4) 较低.
结论:
- 内部来源对MTR系统内的空气污染暴露有很大的贡献.
- 调查结果提供了数据,以帮助通勤者选择尽量减少空气污染暴露的路线.
- 结果为决策者提供了有针对性的战略,以减少城市公共交通中的空气污染.
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