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Arsenic immobilisation in soil using electricity-induced spreading of iron in situ
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-1442-1573
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-5917-2056
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0003-4292-6752
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2023 (English)In: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 325, no Part A, article id 116467Article in journal (Refereed) Published
Abstract [en]

An in situ method for spreading iron amendments to arsenic (As)-contaminated soil has been investigated in the laboratory and field. This study tested the distribution of Fe from corroding electrodes through soil using a low-voltage direct current in a laboratory setting and validated the method in the field for As immobilisation in contaminated soil. Laboratory tests revealed that the corrosion of Fe electrodes in soil occurred in a way similar to that during the Fe electrocoagulation in water, which decreased the As concentrations in flow-through water from 150 μg L−1 to undetectable levels. Method validation over one year in the field using electric current pulses with reversing polarity revealed a decrease in As concentration in groundwater by 72–97% in five of the six groundwater wells within the experimental area. This method of introducing Fe amendments to soil can reduce the need for soil excavation upon chemical immobilisation of contaminants in soil.

Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 325, no Part A, article id 116467
Keywords [en]
Electrocoagulation, Field test, Soil remediation, Wood impregnation chemicals
National Category
Environmental Sciences Geotechnical Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-93765DOI: 10.1016/j.jenvman.2022.116467ISI: 000877509300001PubMedID: 36270123Scopus ID: 2-s2.0-85140273960OAI: oai:DiVA.org:ltu-93765DiVA, id: diva2:1708842
Note

Validerad;2022;Nivå 2;2022-11-07 (joosat);

Funder: Swedish Geological Institute (SGI); Boden municipality

Available from: 2022-11-07 Created: 2022-11-07 Last updated: 2022-11-17Bibliographically approved

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Kumpiene, JurateCarabante, Ivan

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