Elemental Determination and Source Apportionment of Road Dust in Klang Valley, Kuala Lumpur(Special Issue>Malaysian Nuclear Agency)

概要

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This study identified the levels and sources of heavy metal contamination in road dust particles at five different routes (Rl, R2, R3, R4 and R5) of Klang Valley, Kuala Lumpur. Each route covers at least 50 Km of 6 to 7 areas including highway, residential area, business centre and industrial area. Concentration of As, Al, Ba, Ca, Co, Cd, Cr, Cs, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, Sb, Sc, Ti, V and Zn have been determined using Neutron Activation Analysis (NAA) and Inductively Coupled Plasma mass spectrometer (ICP-MS). Based on the average concentrations, the order for dust metal concentrations was Al > Ca > Fe > K > Na > Mg > Ti > Zn > Mn > Ba > Cu > Pb > Cr > As > V > Ni > Cs > Sb > Sc > Co > Cd. Statistical method, factor analysis with varimax approach has been applied to identify the possible metal sources of the observed elemental distribution. The analysis indicated that principal sources of 21 elements in road dust particles included local soil, automobile exhaust emissions, tire wear, break dust, biomass combustion and industrial emission