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Coal fly ash waste, a low-cost adsorbent for the removal of Mordant Orange dye from aqueous media

2021-12Journal article Open access
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dc.contributor.authorRosa, Teresa
dc.contributor.authorMartins, Angela
dc.contributor.authorSantos, Maria Teresa
dc.contributor.authorTrindade, Teodoro
dc.contributor.authorNunes, Nelson
dc.date.accessioned2021-09-17T13:14:03Z
dc.date.available2021-09-17T13:14:03Z
dc.date.issued2021-12
dc.description.abstractIn this study, a coal fly ash material generated in a Portuguese coal thermal powerplant was tested as a low-cost adsorbent to remove dye molecules. Pre-treatment of the coal fly ash samples was not performed in order to reduce end use cost. Physical and chemical characterization revealed their inert nature and low effects lixiviation in aqueous media. Preliminary adsorption studies include adsorbent quantity, and adsorption kinetics. The adsorption studies focused on Mordant Orange 1 (Mo1) dye, but two other molecules, Rhodamine B (RhB) and Methylene Blue (MeB) were also included for comparison reasons. The adsorption isotherms were tested with different models including Langmuir, Freundlich and modified Langmuir-Freundlich. The effect of temperature, pH and unburn carbon in the adsorption process were also studied. The results show that adsorption capacity of the coal fly ash occurs mainly due to electroestatic interactions between the adsorbent surface and the adsorbate, which depends on the pH of the aqueous media and the surface chemistry of the material, quantified by the point of zero charge, pHpzc. These joint effects are responsible for the higher retention of Mo1 that is about 16 times higher, when compared to the other two molecules tested.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationROSA, Teresa; [et al] – Coal fly ash waste, a low-cost adsorbent for the removal of Mordant Orange dye from aqueous media. Journal of the Brazilian Chemical Society. ISSN 0103-5053. Vol. 32, N.º 12 (2021), pp. 2245-2256.pt_PT
dc.identifier.doi10.21577/0103-5053.20210116pt_PT
dc.identifier.eissn1678-4790
dc.identifier.issn0103-5053
dc.identifier.urihttp://hdl.handle.net/10400.21/13743
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSociedade Brasileira de Químicapt_PT
dc.relationCentro de Química Estrutural
dc.relation.publisherversionhttp://static.sites.sbq.org.br/jbcs.sbq.org.br/pdf/2021-0186AR.pdfpt_PT
dc.subjectCoal fly ashpt_PT
dc.subjectWaste valorizationpt_PT
dc.subjectMordant Orange 1pt_PT
dc.subjectDyespt_PT
dc.subjectAdsorptionpt_PT
dc.subjectAqueous mediapt_PT
dc.titleCoal fly ash waste, a low-cost adsorbent for the removal of Mordant Orange dye from aqueous mediapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCentro de Química Estrutural
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00100%2F2020/PT
oaire.citation.endPage2256pt_PT
oaire.citation.issue12pt_PT
oaire.citation.startPage2245pt_PT
oaire.citation.titleJournal of the Brazilian Chemical Societypt_PT
oaire.citation.volume32pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameMartins
person.familyNameSantos
person.familyNameTrindade
person.familyNameNunes
person.givenNameAngela
person.givenNameMaria Teresa
person.givenNameTeodoro
person.givenNameNelson
person.identifier1344292
person.identifier.ciencia-id781F-79D3-9070
person.identifier.ciencia-idAF16-205A-5655
person.identifier.ciencia-id1B16-7872-5A09
person.identifier.orcid0000-0003-1637-478X
person.identifier.orcid0000-0001-8976-6691
person.identifier.orcid0000-0003-2729-4873
person.identifier.orcid0000-0003-4499-0379
person.identifier.ridB-1775-2012
person.identifier.ridE-6706-2012
person.identifier.ridA-8516-2012
person.identifier.scopus-author-id7203013509
person.identifier.scopus-author-id35808636800
person.identifier.scopus-author-id11540776800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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