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Continuous biosorption of single and binary metal solutions in a fixed-bed column using algae gelidium and granulated algal waste from agar extraction

2008Book part Open access
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dc.contributor.authorVilar, Vítor J.P.
dc.contributor.authorBotelho, Cidália
dc.contributor.authorMartins, Ramiro
dc.contributor.authorBoaventura, Rui
dc.date.accessioned2010-02-10T21:56:06Z
dc.date.available2010-02-10T21:56:06Z
dc.date.issued2008
dc.description.abstractThis paper describes the biosorption of single (Zn(II) and Cr(III)) and binary (Cd(II)/Zn(II) and Cu(II)/Cr(III)) metal solutions in a packed bed column using algae Gelidium and an algal waste from the agar extraction industry immobilized with polyacrylonitrile. In the sorption process, Zn(II) breaks through the column faster than Cd(II) due to its lower affinity for the biosorbent. An overshoot in the outlet Zn(II) concentration was observed and explained by competitive adsorption between Cd(II) and Zn(II), whereby the higher Cd(II) affinity for the biosorbent displaces bound Zn(II) ions. The same was verified for the binary system Cu(II)/Cr(III), where an overshoot in the outlet Cu(II) concentration also appeared. Metal desorption using 0.1 M HNO3 as eluant was 100% effective for Cd(II), Zn(II) and Cd(II)/Zn(II) systems. For Cr(III) and Cu(II)/Cr(III) systems, the elution of Cr(III) was not 100% effective. A mathematical model for a fixed-bed system considering film and intraparticle diffusion, equilibrium represented by single and binary Langmuir equations and desorption described by the mass action law, was developed. The uptake breakthrough and elution curves obtained in fixed-bed experiments were adequately predicted by the model.pt
dc.identifier.citationVilar, Vitor; Botelho, Cidália; Martins, Ramiro; Boaventura, Rui (2008). Continuous biosorption of single and binary metal solutions in a fixed-bed column using algae gelidium and granulated algal waste from agar extraction. In Water Resources Research Progress. [S.l.]: Nova Science Publishers. p. 275-296. ISBN 978-1-60021-973-3pt
dc.identifier.isbn978-1-60021-973-3
dc.identifier.urihttp://hdl.handle.net/10198/1837
dc.language.isoengpt
dc.publisherNova Science Publisherspt
dc.subjectContinuous biosorptionpt
dc.subjectAlgaept
dc.subjectPacked bed columnpt
dc.subjectModellingpt
dc.subjectHeavy metalspt
dc.titleContinuous biosorption of single and binary metal solutions in a fixed-bed column using algae gelidium and granulated algal waste from agar extractionpt
dc.typebook part
dspace.entity.typePublication
oaire.citation.conferencePlaceNova Science Publishers, Inc.pt
oaire.citation.endPage296pt
oaire.citation.startPage275pt
oaire.citation.titleWater Resources Research Progresspt
person.familyNameMartins
person.givenNameRamiro
person.identifier.ciencia-idEA17-F39C-29C7
person.identifier.orcid0000-0003-4327-7782
rcaap.rightsopenAccesspt
rcaap.typebookPartpt
relation.isAuthorOfPublicationbf713e37-c17f-4a4e-8323-a7b770a038bf
relation.isAuthorOfPublication.latestForDiscoverybf713e37-c17f-4a4e-8323-a7b770a038bf

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