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dc.contributor.authorAttar, Keltoum
dc.contributor.authorDemey Cedeño, Hary
dc.contributor.authorBouazza, Djamila
dc.contributor.authorSastre Requena, Ana María
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2019-03-06T08:43:31Z
dc.date.available2019-03-06T08:43:31Z
dc.date.issued2019-02-15
dc.identifier.citationAttar, K. [et al.]. Sorption and desorption studies of Pb(II) and Ni(II) from aqueous solutions by a new composite based on alginate and magadiite materials. "Polymers", 15 Febrer 2019, vol. 11, núm. 2, p. 11020340-1-11020340-18.
dc.identifier.issn2073-4360
dc.identifier.urihttp://hdl.handle.net/2117/130075
dc.description.abstractA new composite material based on alginate and magadiite/Di-(2-ethylhexyl) phosphoric acid (CAM-D2EHPA) was successfully prepared by previous impregnation of layered magadiite with D2EHPA extractant, and then immobilized into the alginate matrix. Air dried beads of CAM-D2EHPA were characterized by FTIR and SEM–EDX techniques. The sorbent was used for the separation of lead and nickel from nitrate solutions; the main parameters of sorption such as contact time, pH of the solution, and initial metal concentration were studied. The beads recovered 94% of Pb(II) and 65% of Ni(II) at pH 4 from dilute solutions containing 10 mg L-1 of metal (sorbent dosage, S.D. 1 g L-1). The equilibrium data gave a better fit using the Langmuir model, and kinetic profiles were fitted using a pseudo-second order rate equation. The maximum sorption capacities obtained (at pH 4) were 197 mg g-1 and 44 mg g-1 for lead and nickel, respectively. The regeneration of the sorbent was efficiently carried out with a dilute solution of HNO3 (0.5 M). The composite material was reused in 10 sorption–elution cycles with no significant differences on sorption uptake. A study with synthetic effluents containing an equimolar concentration of both metals indicated a better selectivity towards lead ions
dc.language.isoeng
dc.publisherMultidisciplinary Digital Publishing Institute (MDPI)
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.lcshLiquids
dc.subject.otherAlginate
dc.subject.otherheavy metal
dc.subject.otherH-magadiite
dc.subject.otherorganophosphorus extractants
dc.subject.othersorption
dc.subject.otherdesorption
dc.titleSorption and desorption studies of Pb(II) and Ni(II) from aqueous solutions by a new composite based on alginate and magadiite materials
dc.typeArticle
dc.subject.lemacLíquids -- Absorció i adsorció
dc.contributor.groupUniversitat Politècnica de Catalunya. R2EM - Resource Recovery and Environmental Management
dc.identifier.doi10.3390/polym11020340
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://www.mdpi.com/2073-4360/11/2/340
dc.rights.accessOpen Access
local.identifier.drac23950596
dc.description.versionPostprint (published version)
local.citation.authorAttar, K.; Demey, H.; Bouazza, D.; Sastre, A.
local.citation.publicationNamePolymers
local.citation.volume11
local.citation.number2
local.citation.startingPage11020340-1
local.citation.endingPage11020340-18


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