NDLI: Fractionation of traffic-emitted Ce, La and Zr in road dusts.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Lyubomirova, Valentina Djingova, Rumyana Van Elteren, Johannes T.
Description	Country affiliation: Bulgaria Author Affiliation: Lyubomirova V ( Faculty of Chemistry, University of Sofia, 1, J. Bouchier Blvd., 1164 Sofia, Bulgaria.)
Abstract	The introduction of catalytic converters has led to a new environmental problem since catalysts emit platinum group elements (PGEs) which are among the least distributed elements in nature. Along with PGEs the vehicle exhaust catalysts contain also a number of stabilizers, commonly oxides of rare earth elements and alkaline earth elements such as Ce, La and Zr. Since vehicular emission of these elements has received little attention so far this work attempts to offer insight into their distribution and fate in the environment by measuring their speciation in road dust samples collected along several highways in Germany and a city centre (Saarbrücken). Speciation of the elements (fractionation into associated mineralogical phases) was carried out via a conventional sequential extraction protocol and the complexing abilities of humic substances in the organic matter were investigated by selective extraction methods in combination with size segregation. For evaluation purposes soil samples spiked with catalytic converter material were analyzed, showing a much lower fraction of Ce, La and Zr mobilized in comparison to the road dust samples. It was found that the elements were effectively bound to humic substances in road dust with a preference for complexation with low molecular weight compounds (<1600 Da).
File Format	HTM / HTML
ISSN	14640325
Issue Number	6
Volume Number	13
e-ISSN	14640333
Journal	Journal of Environmental Monitoring
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2011-06-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Environmental Health Air Pollutants Analysis Cerium Dust Lanthanum Vehicle Emissions Zirconium Air Pollution Statistics & Numerical Data Automobiles Environmental Monitoring Humic Substances Soil Chemistry Soil Pollutants Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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