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Immobilization of contaminants from bottom ashes: the role of soil organic matter
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0002-1442-1573
2003 (English)In: Journal of Environmental Engineering and Landscape Management, ISSN 1648-6897, E-ISSN 1822-4199, Vol. 11, no 1, p. 14-22Article in journal (Refereed) Published
Abstract [en]

The utilization of bottom ashes from municipal solid waste incineration (MSWI) in road constructions might cause environmental problems due to the release of toxic metals. The present work is aimed at studying the suitability of soil as a treatment facility of metals leached out from bottom ashes. A laboratory experiment with three types of soil (forest soil, peat and mould soil), and with sand as a reference substrate, was performed to determine the binding capacity of each substrate towards heavy metals, such as Cu and Cr(VI). The results indicated that all the substrates were capable of removing on average 99,3 % of Cu from the solution, while only peat showed a high retention of Cr(VI) (96,2 %). The retention of Cr(VI) was directly proportional to the soil organic matter (SOM) content, while the retention of Cu had no correlation with the SOM of the substrates. A high retention of Cu shown by sand was due to its high content of pH which could favor the precipitation of Cu(OH)2. A synergetic effect of Cu on the retention of Cr(VI) by sand and mould was detected, i.e. increasing concentrations of Cu in the solution increased the retention of Cr. In all the other cases there was no statistically significant interaction between the retention of Cu and Cr(VI) by the analysed substrates.

Place, publisher, year, edition, pages
2003. Vol. 11, no 1, p. 14-22
National Category
Other Environmental Engineering
Research subject
Waste Science and Technology
Identifiers
URN: urn:nbn:se:ltu:diva-8124Local ID: 6972a460-8f53-11db-8975-000ea68e967bOAI: oai:DiVA.org:ltu-8124DiVA, id: diva2:981015
Note
Validerad; 2003; 20061219 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Kumpiene, JurateMaurice, Christian

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