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A scoping study of component-specific toxicity of mercury in urban road dusts from three international locations

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doi: 10.1007/s10653-019-00351-1
Authors:Brown, Andrew D.; Yalala, Bongani; Cukrowska, Ewa; Godoi, Ricardo H. M.; Potgieter-Vermaak, Sanja
Author Affiliations:Primary:
Manchester Metropolitan University, School of Science and the Environment, Manchester, United Kingdom
Copperbelt University, Zambia
Mount Makalu Central Research Station, Zambia
University of Ibadan, Nigeria
University of the Witwatersrand, South Africa
Federal University of Parana, Brazil
Volume Title:Geochemistry for sustainable development
Volume Authors:Watts, Michael J., editor; Maseka, Kakoma K.; Mutodondo, Moola; Sakala, Godfrey; Olatunji, Akinade S.
Source:Geochemistry for sustainable development, edited by Michael J. Watts, Kakoma K. Maseka, Moola Mutodondo, Godfrey Sakala and Akinade S. Olatunji. Environmental Geochemistry and Health, 42(4), p.1127-1139. Publisher: Springer, London, United Kingdom. ISSN: 0269-4042
Publication Date:2020
Note:In English. 52 refs.; illus., incl. 6 tables
Summary:This scoping study presents an investigation of the total and bioaccessible mercury concentrations in road dust (RD) from three international urban sites, where a one-off sampling campaign was conducted at each. This was done to address the hypothesis that the matrix in which mercury is found influences its ability to become accessible to the body once inhaled. For that purpose, the samples were analysed for total and pulmonary bioaccessible mercury and the data compared to the chemical structure of individual particles by SEM. The results obtained from this study suggest that a high mercury content does not necessarily equate to high bioaccessibility, a phenomenon which could be ascribed to the chemical character of the individual particles. It was found that the Manchester samples contained more pulmonary soluble mercury species (as determined by elemental associations of Hg and Cl) in comparison to the other two samples, Curitiba, Brazil, and Johannesburg, South Africa. This finding ultimately underlines the necessity to conduct a site-specific in-depth analysis of RD, to determine the concentration, chemical structure and molecular speciation of the materials within the complex matrix of RD. Therefore, rather than simply assuming that higher bulk concentrations equate to more significant potential human health concerns, the leaching potential of the metal/element in its specific form (for example as a mineral) should be ascertained. The importance of individual particle behaviour in the determination of human health risk is therefore highlighted.
Subjects:Concentration; EDS spectra; Electron microscopy data; Leaching; Mercury; Metals; Particulate materials; Pollution; Raman spectra; SEM data; Spectra; Toxicity; Urban environment; X-ray spectra; Africa; Brazil; England; Europe; Gauteng South Africa; Great Britain; Johannesburg South Africa; Manchester England; Parana Brazil; South Africa; South America; Southern Africa; United Kingdom; Western Europe; Bioaccessibility; Curitiba Brazil; Road dust
Coordinates:S252500 S252500 W0491500 W0491500
N533000 N533000 E0021500 E0021500
S261000 S261000 E0280200 E0280200
Record ID:882851-7
Copyright Information:GeoRef, Copyright 2021 American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany
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