Browsing by Author "Sonibare JA"

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    Atmospheric particulate fractions from Nigerian crude oil spillage
    (2021) Adesanmi AJ; Okedere OB; Sonibare JA; Elehinafe FB; Fakinle BS
    Laboratory simulations of the spill behaviors of three different Nigerian crude oil samples over three media (fresh water, sea water and soil) were carried out with a view to determining the effect of crude oil spillage on emission of fine (PM2.5) and inhalable particulates fractions (PM10). The spillage experiments were carried out in an environmental test box fitted with equipment to regulate the micro climatic conditions (temperature and Relative humidity). The maximum concentrations of PM2.5 were 711, 689 and 680 µgm−3 while those of PM10 were 972, 946 and 940 µgm−3 for sample A, B and C respectively. These peak concentrations were obtained for spill conditions corresponding to fresh water at 45 °C and 49% relative humidity. The least concentrations of PM2.5 and PM10 emitted across all samples were 63 µgm−3 and 256 µgm−3 respectively and these corresponded to spillage over sea water at 15 °C and 80% relative humidity. These concentrations clearly exceeded the short time averaging period (24 h) standards set for PM2.5 and PM10 by the United States Environmental Protection Agency. Incessant crude oil spillages in the Nigerian oil fields are therefore predicted to cause degradation of air quality within a short duration from the spill.
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    Indoor levels of polycyclic aromatic hydrocarbons (PAHs) from environment tobacco smoke of public bars
    (2021) Adesina OA; Nwogu AS; Sonibare JA
    In this work level of Polycyclic Aromatic Hydrocarbon (PAHs) from indoor Environment Tobacco Smoke (ETS) of pubic bars in Nigeria was investigated. Indoor air samples were obtained from different public bars using Polyurethane foam (PUF) passive samplers. Analysis of PAHs was carried out using GC-MS operated in selected ion monitoring mode. Result showed the average concentration range of 2.71–9.69 ng/m3 while the ∑ 16 PAHs range from 43.43 to 155.11 ng/m3. The incremental lifetime cancer risk (ILCR) values from inhalation of PAHs in these bars ranged from 2.4×10−7−5.2×10−7 while non-carcinogenic risk, Hazard Quotient (HQ) ranged from 2×10−4−4.5×10−4. Although these values are lower than WHO permissible limit, nevertheless the study underscores the danger associated with the inhalation of ETS in the public bars in Nigeria.