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Licensed Unlicensed Requires Authentication Published by De Gruyter February 19, 2014

Bioaccessibility, release kinetics, and molecular speciation of arsenic and lead in geo-dusts from the Iron King Mine Federal Superfund site in Humboldt, Arizona

  • Nazune Menka EMAIL logo , Rob Root and Jon Chorover


Mine tailings contain multiple toxic metal(loid)s that pose a threat to human health via inhalation and ingestion. The goals of this research include understanding the speciation and molecular environment of these toxic metal(loid)s (arsenic and lead) as well as the impacts particle size and residence time have on their bioaccessibilty in simulated gastric and lung fluid. Additionally, future work will include smaller size fractions (PM10 and PM2.5) of surface mine tailings, with the goal of increasing our understanding of multi-metal release from contaminated geo-dusts in simulated bio-fluids. This research is important to environmental human health risk assessment as it increases the accuracy of exposure estimations to toxic metal(loid)s.

Corresponding author: Nazune Menka, PhD student, Department of Soil, Water and Environmental Science, University of Arizona, PO Box 210038, Tucson AZ, 85721-0038, USA, Phone: +1-520-621-1646, E-mail:


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Received: 2014-1-16
Accepted: 2014-1-17
Published Online: 2014-2-19
Published in Print: 2014-4-1

©2014 by Walter de Gruyter Berlin/Boston

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