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dc.contributor.authorReig i Amat, Mònica
dc.contributor.authorCasas, Sandra
dc.contributor.authorValderrama Angel, César Alberto
dc.contributor.authorGibert Agulló, Oriol
dc.contributor.authorCortina Pallás, José Luís
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.identifier.citationReig, M., Casas, S., Valderrama, C., Gibert, O., Cortina, J. Integration of monopolar and bipolar electrodialysis for valorization of seawater reverse osmosis desalination brines: Production of strong acid and base. "Desalination", 14 Juliol 2016, vol. 398, p. 87-97.
dc.description.abstractWater scarcity in the Mediterranean basin has been solved by using seawater desalination reverse osmosis technology (SWD-RO). This technology produces brine which is discharged back into the sea resulting in an environmental impact on marine ecosystems. Under the circular economy approach, the aim of this work is to recover resources from NaCl-rich brine (~60-70 g/L), e.g. in the form of NaOH and HCl, by integration of two ion exchange-based membrane technologies and quantify the electrical energy consumption. Electrodialysis (ED) incorporating monovalent selective cation exchange membranes as divalent ions purification and concentration of the NaCl present in the SWD-RO brine, was integrated with bipolar membrane ED (EDBM) to produce NaOH and HCl. Current densities of 0.30–0.40 kA/m2 at two temperature ranges simulating different seawater temperature regimes (15-18 ºC and 22-28ºC) were tested and a pure NaCl solution was used as starting concentrate stream. NaCl-rich brines with 100 or 200 gNaCl/L were obtained by ED and then introduced in the EDBM stack producing HCl and NaOH up to 2 M, depending on the initial concentrations. A minimum energy consumption of 1.7 kWh/kgNaOH was calculated when working by EDBM with initial concentrations of 104 g NaCl/L and 0.24 M HCl and NaOH.
dc.format.extent11 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshCircular economy
dc.subject.lcshMembranes (Technology)
dc.subject.otherDesalination brines
dc.subject.otheracid-base production
dc.subject.otherbipolar membrane
dc.titleIntegration of monopolar and bipolar electrodialysis for valorization of seawater reverse osmosis desalination brines: Production of strong acid and base
dc.subject.lemacMembranes (Tecnologia)
dc.subject.lemacAigua salada -- Dessalatge -- Electrodiàlisi
dc.subject.lemacEconomia circular
dc.contributor.groupUniversitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.authorReig, M.; Casas, S.; Valderrama, C.; Gibert, O.; Cortina, J.

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