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    Assessing fly ash treatment: Remediation and stabilization of heavy metals

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    Type
    Article
    Authors
    Lima, A.T.
    Ottosen, Lisbeth M.
    Ribeiro, Alexandra B.
    KAUST Grant Number
    KUK-C1-017-12
    Date
    2010-12-17
    Permanent link to this record
    http://hdl.handle.net/10754/597610
    
    Metadata
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    Abstract
    Fly ashes from Municipal Solid Waste (MSW), straw (ST) and co-combustion of wood (CW) are here analyzed with the intent of reusing them. Two techniques are assessed, a remediation technique and a solidification/stabilization one. The removal of heavy metals from fly ashes through the electrodialytic process (EDR) has been tried out before. The goal of removing heavy metals has always been the reuse of fly ash, for instance in agricultural fields (BEK). The best removal rates are here summarized and some new results have been added. MSW fly ashes are still too hazardous after treatment to even consider application to the soil. ST ash is the only residue that gets concentrations low enough to be reused, but its fertilizing value might be questioned. An alternative reuse for the three ashes is here preliminary tested, the combination of fly ash with mortar. Fly ashes have been substituted by cement fraction or aggregate fraction. Surprisingly, better compressive strengths were obtained by replacing the aggregate fraction. CW ashes presented promising results for the substitution of aggregate in mortar and possibly in concrete. © 2010 Elsevier Ltd.
    Citation
    Lima AT, Ottosen LM, Ribeiro AB (2010) Assessing fly ash treatment: Remediation and stabilization of heavy metals. Journal of Environmental Management. Available: http://dx.doi.org/10.1016/j.jenvman.2010.11.009.
    Sponsors
    The authors would like to acknowledge CIRIUS for A. T. Lima scientific interchange to the Technical University of Denmark. The research work described in this paper was partly funded by the Utrecht University award for KAUST Center-in-Development SOWACOR, Award No. KUK-C1-017-12.
    Publisher
    Elsevier BV
    Journal
    Journal of Environmental Management
    DOI
    10.1016/j.jenvman.2010.11.009
    PubMed ID
    21167631
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jenvman.2010.11.009
    Scopus Count
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