Naslov
Human bioaccessibility of Pb, Zn and Cd in residential soils from Berg Aukas, Namibia

Autori
Mileusnić, Marta ; Tomašek, Ines ; Mapani, Benjamin

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings of the Closing Workshop of the IGCP/SIDA Projects 594 and 606 / Kribek, Bohdan ; Davies, Theophilus - Prag : Czech Geological Survey, 2014, 95-98

ISBN
9788070758588

Skup
Closing Workshop of the IGCP/SIDA Projects 594 and 606, “Addressing Environmental and Health Impacts of Active and Abandoned Mines in Sub- Saharan Africa”

Mjesto i datum
Prag, Češka Republika, 26.05.2014. - 27.05.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Soil ingestion; potentially toxic elements; bioaccessibility; mining impact; Berg Aukas; Namibia

Sažetak
The subject of this study is soil contaminated by mining activities in the area of the Zn-Pb-V mine at Berg Aukas in northern Namibia. The aim was to determine the degree of pollution, environmental risk and bioaccessibility of potentially toxic elements (PTEs) from soil and taillings in order to estimate the impact of mining activities on the human health. Soil/taillings sampling was performed at locations where residents spend most of their time, in the courtyards, public area and the playground. Laboratory analysis of samples included aqua regia extraction, sequential extraction and body fluids (gastric and intestinal) extraction followed atomic absorption spectrometry, as well as X-ray diffraction. Indicators of soil contamination, environmental risk and daily intake of PTEs (As, Cd, Cu, Hg, Pb and Zn) were calculated. Considering high level of pollution and environmental risk for the studied PTEs in all samples, Berg Aukas residential area is not acceptable for habitation and agricultural use. Given the estimated daily intake of contaminants, children are seriously exposed to lead, cadmium and zinc. The playground, situated in the area of the improperly disposed and unsecured tailings dam, has soil with bioaccessible lead concentrations that are not acceptable even for persons weighing up to 90 kg.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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