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dc.contributor.authorBudhathoki, Roshan
dc.contributor.authorVäisänen, Ari
dc.contributor.authorLahtinen, Manu
dc.date.accessioned2018-04-17T08:38:44Z
dc.date.available2020-06-01T21:35:14Z
dc.date.issued2018
dc.identifier.citationBudhathoki, R., Väisänen, A., & Lahtinen, M. (2018). Selective recovery of phosphorus as AlPO4 from silicon-free CFB-derived fly ash leachate. <em>Hydrometallurgy</em>, 178, 30-36. <a href="https://doi.org/10.1016/j.hydromet.2018.03.025">doi:10.1016/j.hydromet.2018.03.025</a>
dc.identifier.otherTUTKAID_77281
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/57627
dc.description.abstractThe prospect of phosphorus (P) recovery from siliceous fly ash was investigated. The phosphorus content in the pristine fly ash was 1.21%. Obtaining pure phosphorus products from fly ash is very challenging because of high concentration of other elements, silicon (Si) at 17.3% being the major contaminant. The fly ash was fractionated with sieve size of 125 μm to concentrate the phosphorus in the small-size fraction, which also facilitated the removal of 78% of silica (Si) in the solid phase. The fractionated fly ash was treated with 8 M HCl in order to remove 98% of Si by aging (5 h) of leachate until precipitation of Si-gel, and a phosphorus-rich solution is obtained. Iron (Fe) is also considered an impurity in the recovered P-product and its co-precipitation is prevented by the use of EDTA as Fe-masking reagent at [EDTA]/[Fe] ratio of 1. About 70% of Fe is retained in the solution during recovery of phosphorus with aluminum at pH 4. Amorphous white solid was recovered containing 18.08% P, this is 15 times high than that in the pristine fly ash used as raw material in this recovery process.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherElsevier BV
dc.relation.ispartofseriesHydrometallurgy
dc.subject.otherfosfori
dc.subject.otherlentotuhka
dc.subject.otherrauta
dc.subject.otherpii
dc.subject.otherhiukkaset
dc.subject.otherphosphorus recovery
dc.subject.otherfly ash utilization
dc.subject.otherAlPO4 precipitation
dc.subject.otherFe-EDTA chelation
dc.subject.otherphosphorus
dc.subject.otherfly ash
dc.subject.otheriron
dc.subject.othersilicon
dc.subject.otherparticles (matter)
dc.titleSelective recovery of phosphorus as AlPO4 from silicon-free CFB-derived fly ash leachate
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201804132064
dc.contributor.laitosKemian laitosfi
dc.contributor.laitosDepartment of Chemistryen
dc.contributor.oppiaineEpäorgaaninen ja analyyttinen kemia
dc.contributor.oppiaineSoveltava kemia
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2018-04-13T12:15:03Z
dc.description.reviewstatuspeerReviewed
dc.format.pagerange30-36
dc.relation.issn0304-386X
dc.relation.numberinseries0
dc.relation.volume178
dc.type.versionacceptedVersion
dc.rights.copyright© 2018 Elsevier B.V. This is a final draft version of an article whose final and definitive form has been published by Elsevier B.V Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.format.contentfulltext
dc.relation.doi10.1016/j.hydromet.2018.03.025


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