Chemical Characterization and Seasonality of Ambient Particles (PM_2.5) in the City Centre of Addis Ababa.

ABSTRACT: Ambient air pollution is a growing public health concern in major African cities, including Addis Ababa (Ethiopia), where little information is available on fine particulate matter (PM_2.5, with aerodynamic diameter <2.5 µm) pollution. This paper aims to characterize annual PM_2.5, including bulk composition and seasonal patterns, in Addis Ababa. We collected 24-h PM_2.5 samples in the central city every 6 days from November 2015 to November 2016. The mean (±SD) daily PM_2.5 concentration was 53.8 (±25.0) µg/m³, with 90% of sampled days exceeding the World Health Organization's guidelines. Principal components were organic matter (OM, 44.5%), elemental carbon (EC, 25.4%), soil dust (13.5%), and SNA (sulfate, nitrate, and ammonium ions, 8.2

SUBMITTER: Tefera W 

PROVIDER: S-EPMC7579520 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature