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dc.contributor.authorLópez, Julio
dc.contributor.authorde Oliveira, Rodrigo
dc.contributor.authorReig i Amat, Mònica
dc.contributor.authorVecino Bello, Xanel
dc.contributor.authorGibert Agulló, Oriol
dc.contributor.authorde Juan, Ana
dc.contributor.authorCortina Pallás, José Luís
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2021-03-09T13:32:14Z
dc.date.available2023-02-01T01:28:14Z
dc.date.issued2021-02-01
dc.identifier.citationLópez, J. [et al.]. Acid recovery from copper metallurgical process streams polluted with arsenic by diffusion dialysis. "Journal of environmental chemical engineering", 1 Febrer 2021, vol. 9, núm. 1, p. 104692:1-104692:11.
dc.identifier.issn2213-3437
dc.identifier.urihttp://hdl.handle.net/2117/341307
dc.description.abstractA copper smelter generates solutions containing H2SO4 (220 ± 10 g/L), non-metals (3.4 ± 0.2 g/L As) and metals (0.5 ± 0.1 g/L Zn, 0.13 ± 0.01 g/L Fe and 0.11 ± 0.01 g/L Cd) that are treated with lime as disposal option. In order to promote circularity, the recovery of H2SO4 by diffusion dialysis (DD) was evaluated with a lab-stack unit containing Anion Exchange Membranes (Neosepta-AFX) that allow the transport of HSO4- and H+, while rejecting metallic species in cationic form. Initially, dialysis coefficients were determined with cycling type experiments, which showed the possibility to purify H2SO4, but As was also transported. Then, dynamic experiments were carried out to study the effect of different variables, such as operational ones (acid and water flow rates) and As speciation (As(V) or As(III)). At the optimum operating conditions (water and acid flow rates of 0.86 L/m2h), Neosepta-AFX proved to allow the transport of H2SO4 (67 ± 2 % of acid was recovered, 146 ± 12 g/L) and rejected the metallic impurities (>85 %) effectively. Nevertheless, As permeated across the membrane (1.26 g/L in the recovered acid) due to its presence as neutral species (H3AsO4/ H3AsO3). In order to overcome it, the use of a solvent extraction step devoted to remove As before the treatment with DD was proposed.
dc.language.isoeng
dc.publisherElsevier
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshEnvironmental engineering
dc.subject.otherNeosepta-AFX
dc.subject.otherH2SO4
dc.subject.otherDiffusion dialysis
dc.subject.otherAs(III)/As(V) speciation
dc.subject.otherWaste minimisation
dc.subject.otherUV-spectra
dc.titleAcid recovery from copper metallurgical process streams polluted with arsenic by diffusion dialysis
dc.typeArticle
dc.subject.lemacEnginyeria ambiental
dc.contributor.groupUniversitat Politècnica de Catalunya. R2EM - Resource Recovery and Environmental Management
dc.identifier.doi10.1016/j.jece.2020.104692
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/abs/pii/S2213343720310411
dc.rights.accessOpen Access
local.identifier.drac30091098
dc.description.versionPostprint (author's final draft)
local.citation.authorLópez, J.; de Oliveira, R.; Reig, M.; Vecino, X.; Gibert, O.; de Juan, A.; Cortina, J.
local.citation.publicationNameJournal of environmental chemical engineering
local.citation.volume9
local.citation.number1
local.citation.startingPage104692:1
local.citation.endingPage104692:11


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