Transformation Processes of Metals in Urban Road Dust by Ayomi Jayarathne & Buddhi Wijesiri & Prasanna Egodawatta & Godwin A Ayoko & Ashantha Goonetilleke

Author:Ayomi Jayarathne & Buddhi Wijesiri & Prasanna Egodawatta & Godwin A Ayoko & Ashantha Goonetilleke
Language: eng
Format: epub
ISBN: 9789811520785
Publisher: Springer Singapore

Identifying the bonding mechanisms of metals with road dust particles provides useful information in relation to their chemical behaviour and potential environmental impacts. Accordingly, the sequentially extracted metal concentrations were analysed. For this analysis, road dust samples collected from the three study sites; Strathaird Road, Village High Road and Steven Street, which consisted of commercial, residential and industrial land use, respectively, were selected.

The percentage geochemical fractionation characteristics of metals for each land use is shown in Fig. 3.1. It is evident that metals show different affinities for the exchangeable (ion-exchangeable form), reducible (Fe–Mn oxides bound), oxidisable (organic matter bound) and residual (bound to the mineral lattices) geochemical fractions. However, the distribution of metals in each of the geochemical fractions was comparatively similar for all land uses, in which the mean percentages of metals followed the order: exchangeable—Cd > Zn > Cu > Pb > Ni > Cr, reducible—Pb > Cu > Cd > Zn > Ni > Cr, oxidisable—Cu > Pb > Ni > Zn > Cr > Cd and residual—Cr > Ni > Cu > Pb > Zn > Cd.

Fig. 3.1Geochemical fractionation characteristics of metals for different land uses

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.