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Carbonation of municipal solid waste incineration fly ash and the impact on metal mobility
LuleƄ University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0001-7158-4662
2003 (English)In: Journal of environmental engineering, ISSN 0733-9372, E-ISSN 1943-7870, Vol. 129, no 5, p. 435-440Article in journal (Refereed) Published
Abstract [en]

Fly ash from municipal solid waste incineration (MSWI) is considered as hazardous waste that calls for a robust, reliable, and reasonable treatment technique. This investigation aims to assess the impact of CO2 partial pressure, water addition, time, and temperature on the stabilization of MSWI fly ash with particular emphasis on Pb, Zn, Cd, and Cr. Carbonation and element mobility were studied by applying thermal analysis and leaching assays on fly ash samples treated according to a 24 factorial design. The relationship between the factors and the response variables was evaluated using partial least squares modeling. Chemical equilibrium calculations were performed so as to complement the experimental findings. Decalcification of carbonated fly ash in a typical Swedish landfill was estimated at 0.13 mm.yr(-1) Treatment through carbonation reduced the availability of Pb and Zn about 100 times and also the carbonate alkalinity of 7.4 eq. (kg.FS)(-1) (FS represents the fixed solids) was remedied successfully. However, shortcomings that need to be resolved are the remobilization of Cr with time and the mobilization of Cd.

Place, publisher, year, edition, pages
2003. Vol. 129, no 5, p. 435-440
National Category
Other Environmental Engineering Metallurgy and Metallic Materials
Research subject
Waste Science and Technology; Process Metallurgy
Identifiers
URN: urn:nbn:se:ltu:diva-9178DOI: 10.1061/(ASCE)0733-9372(2003)129:5(435)ISI: 000182297500007Scopus ID: 2-s2.0-0037617544Local ID: 7bd88930-96bf-11db-8975-000ea68e967bOAI: oai:DiVA.org:ltu-9178DiVA, id: diva2:982116
Note
Validerad; 2003; 20060929 (pafi)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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