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    Chemical composition of indoor and outdoor PM2.5 in the eastern Arabian Peninsula

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    s11356-024-34482-5.pdf (2.411Mb)
    Date
    2024
    Author
    Tutsak, Ersin
    Alfoldy, Balint
    Mahfouz, Mohamed M.
    Al-Thani, Jassem A.
    Yigiterhan, Oguz
    Shahid, Imran
    Isaifan, Rima J.
    Koçak, Mustafa
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    Abstract
    Water-soluble and trace metal species in fine particulate matter (PM2.5) were determined for indoor and outdoor environments in Doha, Qatar. During the study period, PM2.5 concentrations showed significant variability across several indoor locations ranging from 7.1 to 75.8 μg m−3, while the outdoor mass concentration range was 34.7–154.4 µg m−3. The indoor and outdoor PM2.5 levels did not exhibit statistically significant correlation, suggesting efficient building envelope protection against outdoor PM2.5 pollution. Rather than outdoor sources, human activities such as cooking, cleaning, and smoking were the most significant influence on chemical composition of indoor PM2.5. NH4+ concentration was insufficient to neutralize SO42− indoors and outdoors, indicating the predominant presence of NH4HSO4. The enrichment factors indicated that outdoor Fe, Mn, Co, Cr, and Ni in PM2.5 mostly originated from crustal sources. In contrast, the remaining outdoor trace metals (Cu, Zn, As, Cd, Pb, and V) were mainly derived from anthropogenic sources. The indoor/outdoor concentration ratios revealed significant indoor sources for NH4+ and Cu. The crustal matter, water-soluble ions, and sea salt explained 42%, 21%, and 1% of the indoor PM2.5 mass, respectively. The same groups sequentially constituted 41%, 16%, and 1% of the outdoor PM2.5 mass.
    DOI/handle
    http://dx.doi.org/10.1007/s11356-024-34482-5
    http://hdl.handle.net/10576/57705
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