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Stabilization of Pb- and Cu-contaminated soil using coal fly ash and peat
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0001-7158-4662
2007 (English)In: Environmental Pollution, ISSN 0269-7491, E-ISSN 1873-6424, Vol. 145, no 1, p. 365-373Article in journal (Refereed) Published
Abstract [en]

The stabilization of metal contaminated soil is being tested as an alternative remediation method to landfilling. An evaluation of the changes in Cu and Pb mobility and bioavailability in soil induced by the addition of coal fly ash and natural organic matter (peat) revealed that the amount of leached Cu decreased by 98.2% and Pb by 99.9%, as assessed by a batch test. Metal leaching from the treated soil was lower by two orders of magnitude compared to the untreated soil in the field lysimeters. A possible formation of mineral Cu- and Pb-bearing phases and active surface with oxides were identified by chemical equilibrium calculations. Low metal leaching during a two-year observation period, increased seed germination rate, reduced metal accumulation in plant shoots, and decreased toxicity to plants and bacteria, thereby demonstrating this stabilization method to be a promising technique for in situ remediation of Cu and Pb contaminated soil. Copper and lead mobility and bioavailability in soil can be effectively reduced by using a combination of coal fly ash and peat as soil amendments.

Place, publisher, year, edition, pages
2007. Vol. 145, no 1, p. 365-373
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-9083DOI: 10.1016/j.envpol.2006.01.037ISI: 000242348600044Scopus ID: 2-s2.0-33749992074Local ID: 7a573d90-5573-11dc-8e15-000ea68e967bOAI: oai:DiVA.org:ltu-9083DiVA, id: diva2:982021
Note
Validerad; 2007; 20070828 (pafi)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Kumpiene, JurateLagerkvist, AndersMaurice, Christian

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