Assessing fly ash treatment: Remediation and stabilization of heavy metals

Handle URI:
http://hdl.handle.net/10754/597610
Title:
Assessing fly ash treatment: Remediation and stabilization of heavy metals
Authors:
Lima, A.T.; Ottosen, Lisbeth M.; Ribeiro, Alexandra B.
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.
Publisher:
Elsevier BV
Journal:
Journal of Environmental Management
KAUST Grant Number:
KUK-C1-017-12
Issue Date:
17-Dec-2010
DOI:
10.1016/j.jenvman.2010.11.009
PubMed ID:
21167631
Type:
Article
ISSN:
0301-4797
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.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorLima, A.T.en
dc.contributor.authorOttosen, Lisbeth M.en
dc.contributor.authorRibeiro, Alexandra B.en
dc.date.accessioned2016-02-25T12:43:01Zen
dc.date.available2016-02-25T12:43:01Zen
dc.date.issued2010-12-17en
dc.identifier.citationLima 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.en
dc.identifier.issn0301-4797en
dc.identifier.pmid21167631en
dc.identifier.doi10.1016/j.jenvman.2010.11.009en
dc.identifier.urihttp://hdl.handle.net/10754/597610en
dc.description.abstractFly 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.en
dc.description.sponsorshipThe 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.en
dc.publisherElsevier BVen
dc.subjectElectrodialytic processen
dc.subjectFly ashen
dc.subjectLeachability testsen
dc.subjectMortar stabilizationen
dc.titleAssessing fly ash treatment: Remediation and stabilization of heavy metalsen
dc.typeArticleen
dc.identifier.journalJournal of Environmental Managementen
dc.contributor.institutionUtrecht University, Utrecht, Netherlandsen
dc.contributor.institutionDanmarks Tekniske Universitet, Lyngby, Denmarken
dc.contributor.institutionFaculdade de Ciencias e Tecnologia, New University of Lisbon, Caparica, Portugalen
kaust.grant.numberKUK-C1-017-12en

Related articles on PubMed

All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.