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Mobility and fractionation of arsenic, chromium and copper in thermally treated soil
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0001-7158-4662
2011 (English)In: Waste Management & Research, ISSN 0734-242X, E-ISSN 1096-3669, Vol. 29, no 1, p. 3-12Article in journal (Refereed) Published
Abstract [en]

Thermal treatment is used to remediate soil co-contaminated with organic and inorganic contaminants. It destroys organic contaminants, but the remaining inorganic contaminants require further treatment. In this study the effects of thermal treatment on the mobility, speciation and chemical fractionation of As, Cr and Cu in a CCA-polluted soil were evaluated by leaching tests, As speciation assays and a sequential extraction procedure. The soil was sieved into four size fractions (<0.125, 0.125—0.250, 0.250—0.500 and 0.500—1.0 mm), each of which was treated at 800°C and analysed in comparison with the untreated soil. The leaching of As and Cr increased by factors of 18—40 and 2—23, respectively, while the mobility of Cu decreased 12—14-fold after treatment. The concentration of As(V) in pore water of the finest soil fraction increased 19-fold, whereas that of As(III) remained constant. The treatment reduced As, Cr and Cu associated with the reducible soil fraction. In addition, it increased the proportions of As and Cr (slightly) associated with the exchangeable and acid-soluble soil fractions, and the proportions of Cu and Cr (substantially) associated with the residual fraction.

Place, publisher, year, edition, pages
2011. Vol. 29, no 1, p. 3-12
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-13850DOI: 10.1177/0734242X10382819ISI: 000286096900002PubMedID: 20880937Scopus ID: 2-s2.0-78651408757Local ID: d2514830-89aa-492f-8615-fccd5260160aOAI: oai:DiVA.org:ltu-13850DiVA, id: diva2:986803
Note

Validerad; 2011; 20110113 (desnor)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Nordmark, DesireeKumpiene, JurateAndreas, LaleLagerkvist, Anders

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