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dc.contributor.authorPerez González, Antía 
dc.contributor.authorIbáñez Mendizábal, Raquel 
dc.contributor.authorGómez Rodríguez, Pedro Manuel 
dc.contributor.authorUrtiaga Mendia, Ana María 
dc.contributor.authorOrtiz Uribe, Inmaculada 
dc.contributor.authorIrabien Gulías, José Ángel 
dc.contributor.otherUniversidad de Cantabriaes_ES
dc.description.abstractThis work, as part of a global membrane process for the recovery of alkali and acids from reverse osmosis (RO) desalination brines, focuses on the nanofiltration (NF) separation of polyvalent and monovalent anions, more specifically sulfate and chloride. This pretreatment stage plays a key role in the whole recovery process. Working with model brines simulating the concentration of RO concentrates, 0.2–1.2 M chloride concentration and 0.1 M sulfate concentration, the experimental performance and modeling of the NF separation is reported. The study has been carried out with the NF270 (Dow Filmtec) membrane. The effect of operating pressure (500–2000 kPa), ionic strength (0.4–1.3 M) and chloride initial concentration (0.2–1.2 M) on the membrane separation capacity has been investigated. Finally, the Donnan Steric Pore Model (DSPM) together with experimentally determined parameters, effective pore radius (rp), thickness of the membrane effective layer (d) and effective membrane charge density (Xd), was proved accurate enough to satisfactorily describe the experimental results. In this work we provide for the first time the analysis of partitioning effects and transport mechanism in the NF separation of sulfate and chloride anions in concentrations that simulate those found in RO desalination brines.es_ES
dc.description.sponsorshipThis work has been financially supported by projects CTQ2008-0690, ENE2010-15585 and CTM2011-23912 (co-financed by ERDF Funds).The authors would like to acknowledge SADYT, S.A. for providing assistance for this work.es_ES
dc.format.extent47 p.es_ES
dc.rights© 2015, Elsevier. Licensed under the Creative Commons Reconocimiento-NoComercial-SinObraDerivadaes_ES
dc.sourceJournal of Membrane Science, 2015, 473, 16–27es_ES
dc.subject.otherDesalination brineses_ES
dc.subject.otherStreaming potentiales_ES
dc.subject.otherSeparation sulfate/chloridees_ES
dc.titleNanofiltration separation of polyvalent and monovalent anions in desalination brineses_ES

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© 2015, Elsevier. Licensed under the Creative Commons Reconocimiento-NoComercial-SinObraDerivadaExcept where otherwise noted, this item's license is described as © 2015, Elsevier. Licensed under the Creative Commons Reconocimiento-NoComercial-SinObraDerivada