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Issue 1, 2016
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Fly ash in landfill top covers – a review

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Increase of energy recovery from municipal solid waste by incineration results in the increased amounts of incineration residues, such as fly ash, that have to be taken care of. Material properties should define whether fly ash is a waste or a viable resource to be used for various applications. Here, two areas of potential fly ash application are reviewed: the use of fly ash in a landfill top cover either as a liner material or as a soil amendment in vegetation layer. Fly ashes from incineration of three types of fuel are considered: refuse derived fuel (RDF), municipal solid waste incineration (MSWI) and biofuel. Based on the observations, RDF and MSWI fly ash is considered as suitable materials to be used in a landfill top cover liner. Whereas MSWI and biofuel fly ashes based on element availability for plant studies, could be considered suitable for the vegetation layer of the top cover. Responsible application of MSWI ashes is, however, warranted in order to avoid element accumulation in soil and elevation of background values over time.

Graphical abstract: Fly ash in landfill top covers – a review

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Publication details

The article was received on 27 Aug 2015, accepted on 30 Nov 2015 and first published on 30 Nov 2015

Article type: Critical Review
DOI: 10.1039/C5EM00419E
Citation: Environ. Sci.: Processes Impacts, 2016,18, 11-21
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    Fly ash in landfill top covers – a review

    E. Brännvall and J. Kumpiene, Environ. Sci.: Processes Impacts, 2016, 18, 11
    DOI: 10.1039/C5EM00419E

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