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Changes in leaching and chemical fractionation of arsenic, chromium and copper in soil after thermal treatment
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
University of Oulu.
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2009 (English)In: SARDINIA 2009: Twelfth International Waste Management and Landfill Symposium ; [5 - 9 October 2009, S. Margherita di Pula, Cagliari, Sardinia, Italy] / [ed] Raffaello Cossu, Cagliari: CISA, Environmental Sanitary Engineering Centre , 2009Conference paper (Refereed)
Abstract [en]

Thermal treatment is used for remediation of soils contaminated with both organic and inorganic contaminants. The target is destruction of organic contaminants while the residue containing the inorganic contaminants has to be further treated. The effects of thermal treatment on As, Cr and Cu in contaminated soil are evaluated in laboratory and field tests, using leaching test, As speciation and sequential extraction test. In laboratory tests on four particle size fractions, the leaching of As and Cr increased by factors of 18-40 and 2-23, respectively, while the mobility of Cu decreased 12-4 fold after thermal treatment. The concentration of As(V) in the finest soil fraction increased 19 fold, while As(III) remained constant. Arsenic, Cr and Cu associated to the reducible soil fraction decreased, possibly due to enhanced crystallisation of Fe oxides and reduction of available adsorption sites. In the field test, the concentration of As, Cr and Cu was 1-4 times higher in the filter fraction compared to the treated soil.

Place, publisher, year, edition, pages
Cagliari: CISA, Environmental Sanitary Engineering Centre , 2009.
Research subject
Waste Science and Technology
URN: urn:nbn:se:ltu:diva-39099Local ID: db6c4ad0-e0ea-11de-bae5-000ea68e967bISBN: 978-88-626-5007-6OAI: diva2:1012608
International Waste Management and Landfill Symposium : 05/10/2009 - 09/10/2009
Godkänd; 2009; 20091204 (desnor)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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