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Elemental Composition of PM2.5 Aerosol in a Residential–Industrial Area of a Mediterranean Megacity

Artikel i vetenskaplig tidskrift
Författare Abdallah A. Shaltout
Johan Boman
Salwa K. Hassan
Asmaa M. Abozied
Emad A. Al-Ashkar
Omar H. Abd-Elkader
M. A. Yassin
J. H. Al-Tamimi
Publicerad i Archives of Environmental Contamination and Toxicology
Volym 78
Sidor 68–78
ISSN 0090-4341
Publiceringsår 2020
Publicerad vid Institutionen för kemi och molekylärbiologi
Sidor 68–78
Språk en
Länkar https://doi.org/10.1007/s00244-019-...
Ämnesord PM2.5, Cairo, elemental composition
Ämneskategorier Tungmetaller och övriga metaller

Sammanfattning

Very little is known about the elemental composition and possible sources of fine aerosol particles from Mediterranean megacities. Fine aerosol particles were collected at a residential-industrial area in Greater Cairo, Egypt, during the period from October 2010 to May 2011. The elemental compositions of the collected samples were quantified by using a homemade energy dispersive x-ray fluorescence spectrometer, whereas black carbon was quantified by a black smoke detector. Fifteen elements have been quantified. Of these constituents, Ca, C, Cl, S, and Fe had the highest concentrations: greater than 1 µg m−3. The overall mean mass concentration of the collected samples equals 70 µg m−3; this value exceeds the European Union annual Air Quality Standard levels. The individual elemental concentrations of the fine particles were found to be dominated by elements linked to mineral dust. Most of the monthly variations of elemental concentrations can be attributed to seasonal meteorological conditions. Other possible sources were vehicle-exhaust and industrial activities. The results pinpoint the problem of identifying different sources when one source, in this case, the nearby deserts, is dominant. The results from this study contribute to the growing knowledge of concentrations, composition, and possible sources of ambient fine particulate matter. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.

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