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Speciation and transport of heavy metals and macroelements during electroremediation
Sydkraft Sakab AB, 692 85 Kumla, Sweden.
Man - Technol. - Environ. Res. Ctr., Örebro University, 701 82 Örebro, Sweden.
2003 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 37, no 1, 177-181 p.Article in journal (Refereed) Published
Abstract [en]

Electroremediation makes treatment of contaminated clay soils possible. The external electrical field causes several transport processes and changes in soil chemistry. This study concerns the leachability and transport of calcium, magnesium, copper, zinc, lead, nickel manganese, chromium, and iron during treatment with an electric field of soil from a chlor-alkali factory. As expected, most elements were removed from the acidic part of the soil and accumulated in the zone where pH changed from acidic to alkaline. However, acidic leaching of the soil in this zone did not mobilize the elements. Lead formed both an anionic complex which electromigration transported toward the anode as well as a cationic lead fraction which moved toward the cathode. The anionic complex could be lead sulfate. Lead from both fractions was strongly attached to the soil after treatment. The low availability of metals and macroelements after electrokinetic remediation could make electroremediation, excavation, and deposition of the accumulation zone an alternative for the treatment of contaminated soils.

Place, publisher, year, edition, pages
2003. Vol. 37, no 1, 177-181 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-46754DOI: 10.1021/es010226hOAI: oai:DiVA.org:liu-46754DiVA: diva2:267650
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13

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