PIXE characterization of PM10 and PM2.5 particulates sizes collected in Ikoyi Lagos, Nigeria

• Published in: Toxicological and environmental chemistry Vol. 94; no. 5; pp. 884 - 894
• Main Authors: Ezeh, Godwin C, Obioh, Imoh B, Asubiojo, Olabode I, Abiye, Olawale E
• Format: Journal Article
• Language: English
• Published: Taylor & Francis Group 01.05.2012
• Subjects: bromine; cadmium; calcium; characterization; chromium; cobalt; copper; elemental; elemental composition; filters; inhalable; iron; lead; manganese; nickel; particulate matter; particulates; physicochemical properties; silicon; strontium; urban areas; X-radiation; zinc; zirconium
• ISSN: 1029-0486; 0277-2248; 1029-0486
• DOI: 10.1080/02772248.2012.674133

Ambient concentrations of PM₁₀ (x ≤ 10 µm) and PM₂.₅ (x ≤ 2.5 µm) particulate fractions collected from Ikoyi Lagos, Nigeria, as well as their elemental compositions are presented in this study. Both size-segregated fractions were collected using a double staged ‘Gent’ stack filter unit sampler. Elemental characterizations of dust laden filters were carried out using proton-induced X-ray emission (PIXE) technique. Twenty-two elements (Si, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Pb, Br, Rb, Sr, Zr, Ag, Cd, and Ta) were detected as well as their concentrations and correlations were determined for both particulate size fractions. Their correlation matrix result indicates that some of the trace elements detected could have common source origins or similar chemical properties. The results were similar to the levels observed in moderately polluted urban areas and there is need for source identification and apportionment using receptor models in future studies.