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Influence of particle size distribution, organic carbon, pH and chlorides on washing of mercury contaminated soil
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
Swedish Geotechnical Institute.
Department of Environmental Geochemistry, Institute of Geoecology, University of Braunschweig.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0001-7158-4662
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2014 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 109, p. 99-105Article in journal (Refereed) Published
Abstract [en]

Feasibility of soil washing to remediate Hg contaminated soil was studied. Dry sieving was performed to evaluate Hg distribution in soil particle size fractions. The influence of dissolved organic matter and chlorides on Hg dissolution was assessed by batch leaching tests. Mercury mobilization in the pH range of 3–11 was studied by pH-static titration. Results showed infeasibility of physical separation via dry sieving, as the least contaminated fraction exceeded the Swedish generic guideline value for Hg in soils. Soluble Hg did not correlate with dissolved organic carbon in the water leachate. The highest Hg dissolution was achieved at pH 5 and 11, reaching up to 0.3% of the total Hg. The pH adjustment was therefore not sufficient for the Hg removal to acceptable levels. Chlorides did not facilitate Hg mobilization under acidic pH either. Mercury was firmly bound in the studied soil thus soil washing might be insufficient method to treat the studied soil.

Place, publisher, year, edition, pages
2014. Vol. 109, p. 99-105
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-6935DOI: 10.1016/j.chemosphere.2014.02.058ISI: 000337881100015PubMedID: 24873713Local ID: 54421bab-93dc-4fad-b1f8-f41ffc106bc5OAI: oai:DiVA.org:ltu-6935DiVA, id: diva2:979821
Note
Validerad; 2014; 20140423 (juku)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Xu, JingyingLagerkvist, AndersKumpiene, Jurate

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