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Recovery of Cr(III) from tannery effluents by diafiltration using chitosan modified membranes

2021-09-21Artigo científico Acesso aberto
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dc.contributor.authorZakmout, Asmaa
dc.contributor.authorSadi, Fatma
dc.contributor.authorVelizarov, Svetlozar
dc.contributor.authorCrespo, João G.
dc.contributor.authorPortugal, Carla A. M.
dc.contributor.institutionDQ - Departamento de Química
dc.contributor.institutionLAQV@REQUIMTE
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2022-08-01T22:26:08Z
dc.date.available2022-08-01T22:26:08Z
dc.date.issued2021-09-21
dc.description
dc.description.abstractThe selective recovery of chromium remaining in tannery effluents after the leather tan-ning process is highly desirable to potentiate its reuse, simultaneously minimizing the ecotoxicity of these effluents. To the best of our knowledge, this work evaluates for the first time the ability of a chitosan-based membrane for selective recovery of chromium from a tannery wastewater by sub-sequent diafiltration and selective chromium desorption, envisaging their integration after tannery wastewater treatment by reverse osmosis (RO). A polyethersulfone (PES) microfiltration membrane top-coated with a chitosan layer (cs-PES MF022) was used for selective recovery of Cr(III), from concentrate streams obtained by treatment of synthetic and real tannery effluents through reverse osmosis (RO), through a diafiltration process. The diafiltration of the RO concentrates was conducted by an intermittent addition of water acidified to pH 3.6. The prepared cs-PES MF022 membranes were able to retain 97% of the total mass of Cr(III) present in the RO concentrates, from a real tannery effluent, with a selectivity of 4.2 and 5 in reference to NH4+ and Cl−, respectively, 12.9 and 14.6 in reference to K and Na, and > 45 in reference to Mg, Ca, and S. Such a high selectivity is explained by the preferential adsorption of Cr(III) onto chitosan, and by the relatively high perme-ability of cs-PES MF022 membranes to the other ionic species. Proof of concept studies were per-formed to investigate the desorption of Cr(III) at pH 2 and 5.8. A higher Cr(III) desorption degree was obtained at pH 2, leading to a final solution enriched in Cr(III), which may be re-used in tannery operations, thus improving the process economy and reducing the hazardous impact of the effluents discharged by this industry.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent2827365
dc.identifier.doi10.3390/w13182598
dc.identifier.issn2073-4441
dc.identifier.otherPURE: 45750372
dc.identifier.otherPURE UUID: 5aa3e11f-11b5-4cbe-bd9b-bfc9c6ed9e83
dc.identifier.otherScopus: 85115654947
dc.identifier.otherWOS: 000701521400001
dc.identifier.otherORCID: /0000-0002-9446-0897/work/116676320
dc.identifier.otherORCID: /0000-0001-8714-3781/work/116676476
dc.identifier.urihttp://hdl.handle.net/10362/142773
dc.identifier.urlhttps://www.scopus.com/pages/publications/85115654947
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.subjectChitosan membrane
dc.subjectChromium recovery
dc.subjectDiafiltration
dc.subjectSelective ad-sorption
dc.subjectSelective desorption
dc.subjectTannery effluent
dc.subjectGeography, Planning and Development
dc.subjectBiochemistry
dc.subjectAquatic Science
dc.subjectWater Science and Technology
dc.titleRecovery of Cr(III) from tannery effluents by diafiltration using chitosan modified membranesen
dc.typejournal article
degois.publication.issue18
degois.publication.titleWater (Switzerland)
degois.publication.volume13
dspace.entity.typePublication
oaire.awardNumberUIDB/50006/2020
oaire.awardNumberUIDP/50006/2020
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50006%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50006%2F2020/PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
relation.isProjectOfPublicationadc84c24-ba1d-4bcd-b753-2128ce9a5faa
relation.isProjectOfPublication4d9a4d40-4803-4f3a-976b-d6eaaef42510
relation.isProjectOfPublication.latestForDiscovery4d9a4d40-4803-4f3a-976b-d6eaaef42510

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