This paper describes the evaluation of trace element composition of atmospheric aerosol particles (PM<sub>2.5</sub> and PM<sub>10</sub>) and their influence on air quality in the largest indust...This paper describes the evaluation of trace element composition of atmospheric aerosol particles (PM<sub>2.5</sub> and PM<sub>10</sub>) and their influence on air quality in the largest industrial area of Abidjan city, C?te d’Ivoire. Multi-week sampling was conducted in an urban site (industrial area) in Abidjan from April 2018 to July 2019. The mean mass concentration was 48.83 ± 15.24 μg/m<sup>3</sup> for PM<sub>2.5</sub> and 77.34 ± 10.91 μg/m<sup>3</sup> for PM<sub>10</sub>, with significant temporal variability. The average ratio of PM<sub>2.5</sub>/PM<sub>10</sub> was 0.64 ± 0.21. The concentration of BC in PM<sub>2.5</sub> and PM<sub>10</sub> was respectively 52.32 ± 7.48 μg/m<sup>3</sup> and 52.26 ± 12.07 μg/m<sup>3</sup>. Twenty-two elements: Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Rb, Sr, Zr and Pb were analysed by Energy Dispersive X-ray Fluorescence (EDXRF). Elemental composition data were modeled using principal component analysis (PCA) with varimax rotation to determine two (2) and four (4) dominant source categories contributing to PM<sub>2.5</sub> and PM<sub>10</sub> respectively. In the case of fine particles PM<sub>2.5</sub>, the possible sources were Industrial activities and non-exhaust emissions, exhaust emissions. The PM<sub>10</sub> sources were industrial activities and non-exhaust emissions, industrial processes, mineral dust, and waste combustion.展开更多
文摘This paper describes the evaluation of trace element composition of atmospheric aerosol particles (PM<sub>2.5</sub> and PM<sub>10</sub>) and their influence on air quality in the largest industrial area of Abidjan city, C?te d’Ivoire. Multi-week sampling was conducted in an urban site (industrial area) in Abidjan from April 2018 to July 2019. The mean mass concentration was 48.83 ± 15.24 μg/m<sup>3</sup> for PM<sub>2.5</sub> and 77.34 ± 10.91 μg/m<sup>3</sup> for PM<sub>10</sub>, with significant temporal variability. The average ratio of PM<sub>2.5</sub>/PM<sub>10</sub> was 0.64 ± 0.21. The concentration of BC in PM<sub>2.5</sub> and PM<sub>10</sub> was respectively 52.32 ± 7.48 μg/m<sup>3</sup> and 52.26 ± 12.07 μg/m<sup>3</sup>. Twenty-two elements: Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Rb, Sr, Zr and Pb were analysed by Energy Dispersive X-ray Fluorescence (EDXRF). Elemental composition data were modeled using principal component analysis (PCA) with varimax rotation to determine two (2) and four (4) dominant source categories contributing to PM<sub>2.5</sub> and PM<sub>10</sub> respectively. In the case of fine particles PM<sub>2.5</sub>, the possible sources were Industrial activities and non-exhaust emissions, exhaust emissions. The PM<sub>10</sub> sources were industrial activities and non-exhaust emissions, industrial processes, mineral dust, and waste combustion.