MINERALOGICAL AND GEOCHEMICAL ASSESSMENT OF PARTICULATE MATTER (PM10) IN IBADAN METROPOLIS, NIGERIA

TESLEEM KOLAWOLE 235 PAGES (46969 WORDS) Geology Thesis
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ABSTRACT

Particulate Matter (PM) are suspended solid and liquid particles in the atmosphere, classified into coarse (PM10, 2.5 to 10µm) and fine (PM2.5 2.5 µm) and irregular in shape with very few being regular and fine (Fe>Al>Na>Mg>Si>Zn>Cu>Mo>Mn>Ba>Ti>Pb>Ni>La. The IA showed highest average concentration of all elements in the PM10 except Ba, which was highest in TA. The elemental composition agreed with the mineralogical data as revealed by the PCA. Factor 1 was loaded with Al, Si, Ca, Fe and Mg while Factor 2 was Ca, Mg, and Na, indicating crustal source for these elements. Factor 3 was loaded with Pb, Zn, indicating industrial emission source while Factors 4 (Cu, La, Mo) and 5 (Ba, Mn) indicated traffic related contribution. The mineralogy and elemental composition in the Particulate Matter (PM10) were derived mainly from crustal sources with subordinate contributions from anthropogenic sources. The presence of Pb, Cu, Zn and Si in the coarse particulate matter could pose serious health hazard to the human population.

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