Treatment of chromium effluent by adsorption on chitosan activated with ionic liquids

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dc.contributor.authorEliodorio K.P.
dc.contributor.authorAndolfatto V.S.
dc.contributor.authorMartins M.R.G.
dc.contributor.authorde Sa B.P.
dc.contributor.authorUmeki E.R.
dc.contributor.authorde Araujo Morandim-Giannetti A.
dc.date.accessioned2019-08-20T00:12:01Z
dc.date.available2019-08-20T00:12:01Z
dc.date.issued2017
dc.description.abstract© 2017, Springer Science+Business Media Dordrecht.This study proposes, verifies, and refines the use of biopolymers treated with two new ionic liquids (ILs) (sec-butylammonium acetate and n-octylammonium acetate), as a platform for chromium adsorption. The ILs were synthesized, characterized, and applied to chitosan treatment. Analyzing the size distribution of microparticles of chitosan and chitosan activated with ILs (sec-butylammonium acetate and n-octylammonium acetate), we observed that a little decrease in the particle size occurred with the activation of chitosan (176 ± 0.02 μm to 167 ± 0.054 and 168.5 ± 0.05 μm, respectively), as well as changes in the X-ray diffraction FTIR_ATR spectra. Further studies were performed using the best adsorbent – chitosan treated with sec-butylammonium acetate. In this case, the chromium VI concentration in the sample was reduced by more than 99% when using chitosan treated with IL sec-butylammonium acetate. The best reaction time was determined as 1 h, which allowed a chromium adsorption of 99.1% and the adsorption kinetic data were best represented by the second-order model (k2 = 11.7258 g mg−1 min−1). The maximum adsorption capacity was obtained using the Langmuir isotherm model (20.833 mg g−1 at pH 4 during 1 h, using 1.0 g of chitosan), and the adsorption efficiency was enhanced at 25 °C by the Freundlich isotherm model, in which the constants KF and n were determined as 0.875 mg L−1 and 1.610, respectively.
dc.description.firstpage2559
dc.description.issuenumber6
dc.description.lastpage2570
dc.description.volume24
dc.identifier.citationELIODORIO, KEVY PONTES; ANDOLFATTO, VITOR SEORRA; MARTINS, MARCO RULEVAS GOMES; DE SÁ, BRENO PIVARO; UMEKI, ERICK RYOITI; DE ARAÚJO MORANDIM-GIANNETTI, ANDREIA. Treatment of chromium effluent by adsorption on chitosan activated with ionic liquids. Cellulose, v. 24, p. 2559-2570, 2017.
dc.identifier.doi10.1007/s10570-017-1264-3
dc.identifier.issn0969-0239
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/1690
dc.relation.ispartofCellulose
dc.rightsAcesso Restrito
dc.subject.otherlanguageChitosan
dc.subject.otherlanguageHexavalent chromium
dc.subject.otherlanguageIonic liquids
dc.subject.otherlanguageWastewater treatment
dc.titleTreatment of chromium effluent by adsorption on chitosan activated with ionic liquids
dc.typeArtigo
fei.scopus.citations14
fei.scopus.eid2-s2.0-85015858134
fei.scopus.subjectAdsorption capacities
fei.scopus.subjectAdsorption efficiency
fei.scopus.subjectAdsorption kinetics
fei.scopus.subjectChromium adsorption
fei.scopus.subjectFreundlich isotherm model
fei.scopus.subjectHexavalent chromium
fei.scopus.subjectLangmuir isotherm models
fei.scopus.subjectSecond-order models
fei.scopus.updated2024-05-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85015858134&origin=inward
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