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Tannery effluent treatment by nanofiltration, reverse osmosis and chitosan modified membranes

2020-11-28Artigo científico Acesso aberto
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dc.contributor.authorZakmout, Asmaa
dc.contributor.authorSadi, Fatma
dc.contributor.authorPortugal, Carla A. M.
dc.contributor.authorCrespo, João G.
dc.contributor.authorVelizarov, Svetlozar
dc.contributor.institutionDQ - Departamento de Química
dc.contributor.institutionLAQV@REQUIMTE
dc.contributor.pblMDPI AG
dc.date.accessioned2021-05-05T23:27:36Z
dc.date.available2021-05-05T23:27:36Z
dc.date.issued2020-11-28
dc.descriptionUID/QUI/50006/2019
dc.description.abstractThe objective of this work is to develop an appropriate technology for environmentally sound membrane-based purification of a tannery effluent assuring, simultaneously, the recovery of chromium, considered as the most hazardous inorganic water pollutant extensively used in leather tanning. A comparison between the permeate fluxes obtained during treatment of a synthetic tannery effluent through nanofiltration (NF270 and NF90 membranes) and reverse osmosis (BW30 and SW30) membranes was first performed. Then, a dedicated polymeric membrane was prepared by coating chitosan (cs) on a polyethersulfone (PES) microfiltration membrane (cs-PES MFO22) support. The resulting membrane was characterized by Fourier Transforms Infrared Spectroscopy Attenuated Total Reflectance (FTIR-ATR), Emission Scanning Electronic Microscopy (SEM) to confirm the process of surface modification and cross-linking of chitosan with glutaraldehyde. This membrane was found to be highly effective for chromium removal (>99%), which was more than eight times higher in reference to monovalent cations (e.g., Na+ and K+) and more than six times higher in reference to the divalent cations (Mg2+ and Ca2+) studied. The reverse osmosis permeate conforms to local Algerian regulations regarding being discharged directly into the natural environment (in this case, Reghaia Lake) or into urban sewers linked to wastewater biological treatment stations. While the SW30 membrane proved to be the most effective for purification of the tannery effluent, the chitosan modified membrane proved to be appropriate for recovery of chromium from the reverse osmosis concentrate.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent20
dc.format.extent3354691
dc.identifier.doi10.3390/membranes10120378
dc.identifier.issn0076-6356
dc.identifier.otherPURE: 28469134
dc.identifier.otherPURE UUID: 1915f49b-809f-426e-9a0a-aaf6e0a4f830
dc.identifier.otherScopus: 85098563551
dc.identifier.otherPubMed: 33260505
dc.identifier.otherPubMedCentral: PMC7761313
dc.identifier.otherWOS: 000602048200001
dc.identifier.otherORCID: /0000-0002-9446-0897/work/93369482
dc.identifier.otherORCID: /0000-0001-8714-3781/work/93369594
dc.identifier.urihttp://hdl.handle.net/10362/117156
dc.identifier.urlhttps://www.scopus.com/pages/publications/85098563551
dc.language.isoeng
dc.peerreviewedyes
dc.subjectChitosan membranes
dc.subjectChromium recovery
dc.subjectNanofiltration
dc.subjectReverse osmosis
dc.subjectTannery effluent
dc.subjectChemical Engineering (miscellaneous)
dc.subjectProcess Chemistry and Technology
dc.subjectFiltration and Separation
dc.subjectSDG 6 - Clean Water and Sanitation
dc.subjectSDG 11 - Sustainable Cities and Communities
dc.titleTannery effluent treatment by nanofiltration, reverse osmosis and chitosan modified membranesen
dc.typejournal article
degois.publication.firstPage1
degois.publication.issue12
degois.publication.lastPage20
degois.publication.titleMembranes
degois.publication.volume10
dspace.entity.typePublication
rcaap.rightsopenAccess

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