Development and characterization of polymer inclusion membranes for the separation and speciation of inorganic As species
dc.contributor.author
dc.date.accessioned
2016-04-18T11:27:40Z
dc.date.available
2016-04-18T11:27:40Z
dc.date.issued
2011
dc.identifier.issn
0376-7388
dc.identifier.uri
dc.description.abstract
This study involves the preparation and optimization of polymer inclusion membranes (PIMs) based on the polymer cellulose triacetate and the extractant (carrier) Aliquat 336 (a mixture of quaternary ammonium chlorides) for the transport of inorganic As species (arsenite and arsenate) from their aqueous solutions. The influence of the composition of the membranes on its extraction and transport properties was investigated. Better membrane performance was obtained when the membranes did not contain plasticizer and the concentration of the extractant was high. Under these conditions arsenate (As(V)) could be quantitatively separated from As(III) within 5 h even in the presence of common anions (i.e. chloride, phosphate, nitrate, sulfate and carbonate) often encountered in natural waters and industrial and domestic wastewaters.Electrical impedance spectroscopy measurements allowed the determination of the dielectric constant and conductivity values of the PIMs of interest. These results suggested that the extracted As(V) species was HAsO4 2- which was further transported across the membrane by a hopping mechanism, counter currently to the transport of the chloride anions present at a high concentration in the stripping solution.The overall performance of the proposed PIM in terms of stability, selectivity and permeability compared favorably to those of an Aliquat 336 based supported liquid membrane and a commercial multi-valent anion exchange membrane
dc.description.sponsorship
This work was supported by the Spanish Ministerio de Ciencia e Inovación, through Project (CTM2008-06847-C02 02/TECNO). R. Güell gratefully acknowledges a grant awarded by the University of Girona (Ref. BR06/10)
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
info:eu-repo/grantAgreement/MICINN//CTM2008-06847-C02-02/ES/EVALUACION DE LA EFICACIA DE LAS PLANTAS DE TRATAMIENTO DE AGUAS RESIDUALES EN LA ELIMINACION DE COMPUESTOS ORGANICOS EMERGENTES DE LAS AGUAS PARA SU REUTILIZACION/
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.memsci.2011.08.037
dc.relation.ispartof
© Journal of Membrane Science, 2011, vol. 383, núm. 1-2, p. 88-95
dc.relation.ispartofseries
Articles publicats (D-Q)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Development and characterization of polymer inclusion membranes for the separation and speciation of inorganic As species
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
015654
dc.contributor.funder
dc.relation.ProjectAcronym