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The release of As, Cr and Cu from contaminated soil stabilized with APC residues under landfill conditions
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-1343-2465
Rang-Sells Avfallsbehandling AB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-1442-1573
2015 (English)In: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 151, p. 1-10Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to investigate the stability of As, Cr and Cu in contaminated soil treated with air pollution control residues under landfill conditions. The influence of landfill gas and temperature on the release of trace elements from stabilized soil was simulated using a diffusion test. The air pollution control residues immobilized As through the precipitation of Ca–As minerals (calcium arsenate (Ca5H2(AsO4)3 × 5H2O), weilite (CaAsO4) and johnbaumite (Ca5(AsO4)3(OH)), incorporation of As into ettringite (Ca6Al2(SO4)3(OH)12 × 26H2O) and adsorption by calcite (CaCO3). The air pollution control residues generally showed a high resistance to pH reduction, indicating high buffer capacity and stability of immobilized As in a landfill over time. Generation of heat in a landfill might increase the release of trace elements. The release of As from stabilized soil was diffusion-controlled at 60 °C, while surface wash-off, dissolution, and depletion prevailed at 20 °C. The air pollution control residues from the incineration of municipal solid waste immobilized Cr, indicating its stability in a landfill. The treatment of soil with air pollution control residues was not effective in immobilization of Cu. Contaminated soils treated with air pollution control residues will probably have a low impact on overall leachate quality from a landfill.

Place, publisher, year, edition, pages
2015. Vol. 151, p. 1-10
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
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URN: urn:nbn:se:ltu:diva-7267DOI: 10.1016/j.jenvman.2014.11.035PubMedID: 25528268Scopus ID: 2-s2.0-84918817193Local ID: 59c09039-ce8f-49ee-97c6-6e8830809959OAI: oai:DiVA.org:ltu-7267DiVA, id: diva2:980156
Note
Validerad; 2014; 20141219 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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