在乌干达姆巴拉拉的环境PM2.5时间变化和来源分配
Silver Onyango1, Crystal M North2,3,4, Hatem A Ellaithy2
1Mbarara University of Science and Technology, Mbarara, Uganda.
Aerosol and air quality research
|July 1, 2024
概括
乌干达的空气污染,特别是细颗粒物 (PM2.5),明显超过全球空气质量标准. 确定的主要污染源包括交通和生物质燃烧,需要针对公共卫生制定有针对性的减缓战略.
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:
- 空气污染是全球领先的环境健康风险,不成比例地影响着资源有限的地区,如撒哈拉以南非洲.
- 在许多非洲国家,包括乌干达,关于环境空气质量和污染源的数据有限.
- 乌干达现有的研究往往忽视了非城市地区和细颗粒物 (PM2.5) 的详细来源分配.
研究的目的:
- 为了量化乌干达姆巴拉拉的每日环境PM2.5度.
- 识别和描述导致姆巴拉拉PM2.5污染的主要来源.
- 将姆巴拉拉的空气质量与坎帕拉和世界卫生组织 (WHO) 的指导方针进行比较.
主要方法:
- 从2018年5月到2019年2月,使用哈佛冲击器测量了每日环境PM2.5的数量.
- 使用X射线光和正矩阵因子化确定了PM2.5来源.
- 数据比较了姆巴拉拉和坎帕拉之间的数据,并与世卫组织空气质量基准进行了比较.
主要成果:
- 姆巴拉拉的PM2.5平均度为26.7μg/m3,明显低于坎帕拉的59.4μg/m3,但仍然超过了世卫组织指南的58%.
- 姆巴拉拉的PM2.5水平在干旱季 (30.8μg/m3) 与雨季 (21.3μg/m3) 相比,在干旱季 (30.8μg/m3) 较高.
- 在姆巴拉拉的主要PM2.5来源是与交通相关的排放,生物质燃烧,二次气溶,工业,重油燃烧,土壤和盐气溶.
结论:
- 乌干达姆巴拉拉的空气质量严重受损,对公众健康构成重大风险.
- 迫切需要采取缓解干预措施,重点是减少交通和生物质燃烧的排放.
- 解决这些主要来源对于改善乌干达西南部空气质量至关重要.
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