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dc.contributor.authorBudhathoki, Roshan
dc.contributor.authorVäisänen, Ari
dc.date.accessioned2018-12-21T07:28:44Z
dc.date.available2020-08-02T21:35:14Z
dc.date.issued2018
dc.identifier.citationBudhathoki, R., & Väisänen, A. (2018). Removal of silicon from CFB-derived fly ash leachate in the context of phosphorus recovery. <i>Hydrometallurgy</i>, <i>179</i>, 215-221. <a href="https://doi.org/10.1016/j.hydromet.2018.06.007" target="_blank">https://doi.org/10.1016/j.hydromet.2018.06.007</a>
dc.identifier.otherCONVID_28127524
dc.identifier.otherTUTKAID_78062
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/60785
dc.description.abstractHigh concentrations of dissolved silica in the acid leachate impose two major challenges on precipitation based recovery of phosphorus (P). Firstly, co-precipitation of colloidal silica in the acidic regimes decreases the purity and value of precipitated P-products. In addition, silica scaling on internal surfaces of equipment is also a problematic issue in industrial operations. Therefore, removal of dissolved silica prior to P-recovery process minimizes the risks of Si-contamination in P-products and Si-scaling. In the present study, silica removal was achieved by accelerated silica polymerization with higher acidity and ionic strength of mineral acid, which also assisted the leaching of CFB-derived fly ash, by aging of the leachate solution. The effects of acid concentration, temperature, and stirring on silica removal rate in acid leachate were also investigated. Higher concentrations of H+ and Cl− and higher temperature significantly reduce the silica removal time. HCl was more suitable for improving leachability of phosphorous and precipitating silica in comparison with HNO3. The silica removal method discussed in this work has been shown to be capable of removing >98% of dissolved silica from the acid leachate solution.fi
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherElsevier BV
dc.relation.ispartofseriesHydrometallurgy
dc.rightsCC BY-NC-ND 4.0
dc.subject.otherphosphorus recycle
dc.subject.othersilica removal
dc.subject.othersilica polymerization
dc.subject.otherfly ash utilization
dc.titleRemoval of silicon from CFB-derived fly ash leachate in the context of phosphorus recovery
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201812175169
dc.contributor.laitosKemian laitosfi
dc.contributor.laitosDepartment of Chemistryen
dc.contributor.oppiaineEpäorgaaninen ja analyyttinen kemiafi
dc.contributor.oppiaineSoveltava kemiafi
dc.contributor.oppiaineInorganic and Analytical Chemistryen
dc.contributor.oppiaineApplied Chemistryen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2018-12-17T13:15:15Z
dc.description.reviewstatuspeerReviewed
dc.format.pagerange215-221
dc.relation.issn0304-386X
dc.relation.numberinseries0
dc.relation.volume179
dc.type.versionacceptedVersion
dc.rights.copyright© 2018 Elsevier B.V.
dc.rights.accesslevelopenAccessfi
dc.subject.ysofosfori
dc.subject.ysotalteenotto
dc.subject.ysopii
dc.subject.ysolentotuhka
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p8695
jyx.subject.urihttp://www.yso.fi/onto/yso/p11190
jyx.subject.urihttp://www.yso.fi/onto/yso/p15609
jyx.subject.urihttp://www.yso.fi/onto/yso/p19886
dc.rights.urlhttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.relation.doi10.1016/j.hydromet.2018.06.007


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