alexa Source characterisation of road dust based on chemical and mineralogical composition.
Toxicology

Toxicology

Journal of Environmental & Analytical Toxicology

Author(s): Gunawardana C, Goonetilleke A, Egodawatta P, Dawes L, Kokot S, Gunawardana C, Goonetilleke A, Egodawatta P, Dawes L, Kokot S

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Abstract Road dust contain potentially toxic pollutants originating from a range of anthropogenic sources common to urban land uses and soil inputs from surrounding areas. The research study analysed the mineralogy and morphology of dust samples from road surfaces from different land uses and background soil samples to characterise the relative source contributions to road dust. The road dust consist primarily of soil derived minerals (60\%) with quartz averaging 40-50\% and remainder being clay forming minerals of albite, microcline, chlorite and muscovite originating from surrounding soils. About 2\% was organic matter primarily originating from plant matter. Potentially toxic pollutants represented about 30\% of the build-up. These pollutants consist of brake and tire wear, combustion emissions and fly ash from asphalt. Heavy metals such as Zn, Cu, Pb, Ni, Cr and Cd primarily originate from vehicular traffic while Fe, Al and Mn primarily originate from surrounding soils. The research study confirmed the significant contribution of vehicular traffic to dust deposited on urban road surfaces. Crown Copyright © 2011. Published by Elsevier Ltd. All rights reserved. This article was published in Chemosphere and referenced in Journal of Environmental & Analytical Toxicology

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