Browsing by Author "Ameen, Hafsat Abolore"

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    Source identification and health risk assessments of polycyclic aromatic hydrocarbons in settled dusts from different population density areas of Ilorin, Nigeria
    (Springer nature, 2021-11-08) Adeniran ,Jamiu Adetayo; Abdulraheem,Maimuna Orire; Ameen, Hafsat Abolore; Odediran ,Emmanuel Toluwalope; Yusuf ,Muhammad‑Najeeb O.
    Polycyclic aromatic hydrocarbons (PAHs) have attracted signifcant attention in recent times on account of their reasonably high environmental bur den and extreme toxicity. Samples of indoor dusts were obtained daily over a period of 2 weeks from 10 residences located within low, medium, and high den sity residential areas of Ilorin City. The concentra tion levels, potential sources, and cancer health risks of sixteen polycyclic aromatic hydrocarbons (PAHs) were investigated using gas chromatography/mass spectrometry. PAHs total concentrations varied from 3.95±0.19 to 8.70±0.43  μg/g with arithmetic mean of 6.09±0.46  μg/g. Fluoranthene was the most domi nant PAHs congener. High molecular weight (HMW) PAHs (4–6 rings) were the most prevalent PAHs and were responsible for 79.29% of total PAHs in sampled residences. Chrysene (Chry) was the most abundant compound among the 7 carcinogenic PAHs (CPAHs). Moreover, diagnostic ratios and positive matrix fac torization (PMF) employed to apportion PAHs sug gested that indoor dusts originated from indoor activi ties and infltrating outdoor air pollutants. Diagnostic ratios revealed that PAHs are from mixed sources which include coal/wood combustion, non-trafc and trafc emissions, petroleum, petrogenic (gasoline), and petro leum combustion. Similarly, positive matrix factoriza tion (PMF) model suggested fve sources (factors) were responsible for PAHs in indoor dusts comprised of petroleum combustion and trafc emissions (60.05%), wood and biomass combustion emissions (20.84%), smoke from cooking, incense burning and tobacco (4.17%), gasoline combustion from non-trafc sources (13.89%), and emissions from coal burning and elec tronic devices (1.05%). The incremental lifetime car cinogenic risks (ILCR) of PAHs in adults and children estimated by applying benzo(a)pyrene (BaP) equivalent were within the satisfactory risk limits in Ilorin. Indoor PAHs emissions in Ilorin residences could be monitored and controlled by using data provided in this study.