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Nanofiltration for the treatment of coke plant ammoniacal wastewaters

2011-01-14Journal article Open access
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dc.contributor.authorKorzenowski, Christa
dc.contributor.authorMinhalma, Miguel
dc.contributor.authorBernardes, Andrea M.
dc.contributor.authorZoppas Ferreira, Jane
dc.contributor.authorde Pinho, Maria Norberta
dc.date.accessioned2013-02-15T18:19:01Z
dc.date.available2013-02-15T18:19:01Z
dc.date.issued2011-01-14
dc.description.abstractThis work addresses the treatment by nanofiltration (NF) of solutions containing NaCN and NH(4)Cl at various pH values. The NF experiments are carried out in a Lab-Unit equipped with NF-270 membranes for model solutions that are surrogates of industrial ammoniacal wastewaters generated in the coke-making processes. The applied pressure is 30 bar. The main objective is the separation of the compounds NaCN and NH(4)Cl and the optimization of this separation as a function of the pH. Membrane performance is highly dependent on solution composition and characteristics, namely on the pH. In fact, the rejection coefficients for the binary model solution containing sodium cyanide are always higher than the rejections coefficients for the ammonium chloride model solution. For ternary solutions (cyanide/ammonium/water) it was observed that for pH values lower than 9 the rejection coefficients to ammonium are well above the ones observed for the cyanides, but for pH values higher than 9.5 there is a drastic decrease in the ammonium rejection coefficients with the increase of the pH. These results take into account the changes that occur in solution, namely, the solute species that are predominant, with the increase of the pH. The fluxes of the model solutions decreased with increased pH. (C) 2010 Elsevier B.V. All rights reserved.por
dc.identifier.citationKORZENOWSKI, Christa; MINHALMA, Miguel; BERNARDES, Andrea M.; FERREIRA, Jane Zoppas; de de PINHO, Maria Norberta - Nanofiltration for the treatment of coke plant ammoniacal wastewaters. Separation and Purification Technology. ISSN 1383-5866. Vol. 76, n.º 3 (2011) p. 303-307.por
dc.identifier.issn1383-5866
dc.identifier.urihttp://hdl.handle.net/10400.21/2219
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Science BVpor
dc.subjectCoke plant wastewaterspor
dc.subjectAmmoniumpor
dc.subjectCyanidespor
dc.subjectNanofiltrationpor
dc.subjectFractionationpor
dc.subjectWaste-water treatmentpor
dc.subjectRemovalpor
dc.subjectThiocyanatepor
dc.subjectPhenolpor
dc.titleNanofiltration for the treatment of coke plant ammoniacal wastewaterspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceAmsterdampor
oaire.citation.endPage307por
oaire.citation.issue3por
oaire.citation.startPage303por
oaire.citation.titleSeparation and Purification Technologypor
oaire.citation.volume76por
person.familyNameKorzenowski
person.familyNameMinhalma
person.familyNameZoppas Ferreira
person.givenNameChrista
person.givenNameMiguel
person.givenNameJane
person.identifier2161276
person.identifier.ciencia-id5C1D-13E2-201B
person.identifier.orcid0000-0001-6500-2910
person.identifier.orcid0000-0002-6770-194X
person.identifier.orcid0000-0002-3137-297X
person.identifier.ridC-3304-2008
person.identifier.ridI-5645-2012
person.identifier.scopus-author-id6506304514
person.identifier.scopus-author-id7403252457
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationa0749982-e950-43ec-9ffd-37897df45f60
relation.isAuthorOfPublication8ed0648a-758d-4b1d-b364-f8ea7195308f
relation.isAuthorOfPublicationd52a7e92-e581-421d-949a-a9c01acd939a
relation.isAuthorOfPublication.latestForDiscovery8ed0648a-758d-4b1d-b364-f8ea7195308f

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