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Diffusion tests of mercury through concrete, bentonite-enhanced sand and sand
Örebro University, Department of Natural Sciences.
Örebro University, Department of Natural Sciences.ORCID iD: 0000-0002-2104-4593
2007 (English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336, Vol. 142, no 1-2, p. 463-467Article in journal (Refereed) Published
Abstract [en]

The transport by diffusion of Hg(II) and Hg(O) through a barrier of concrete or bentonite-enhanced sand was examined under aerobic conditions. Sand was used as a reference system parallel to the two systems. Speciation of mercury was performed with a purge and trap method, where dissolved Hg(O) was purged with nitrogen gas from the sample, through a trap for volatile oxidized mercury species and finally trapped in an oxidative solution. The apparent diffusion coefficient (from Fick's second law of diffusion) for oxidized mercury was 1 x 10(-14) m(2)/s in Standard Portland concrete and 4 x 10(-13) m(2)/s in quartz sand. The diffusion of Hg(O) seemed to be faster than for Hg(II), Hg(O) was however oxidized to Hg(H) under aerobic conditions, and after 45 months only 1-10% of the total mercury concentration was Hg(O). (c) 2006 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2007. Vol. 142, no 1-2, p. 463-467
Keywords [en]
mercury diffusion, concrete, bentonite-enhanced sand, apparent diffusion coefficient of mercury
National Category
Chemical Sciences
Research subject
Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-13861DOI: 10.1016/j.jhazmat.2006.08.046ISI: 000245839100058OAI: oai:DiVA.org:oru-13861DiVA, id: diva2:389864
Available from: 2011-01-20 Created: 2011-01-13 Last updated: 2017-12-11Bibliographically approved

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Svensson, MargaretaAllard, Bert

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