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dc.contributor.authorHermassi, Mehrez
dc.contributor.authorValderrama Angel, César Alberto
dc.contributor.authorMoreno Palmerola, Natalia
dc.contributor.authorFont Piqueras, Oriol
dc.contributor.authorQuerol Carceller, Xavier
dc.contributor.authorBatis, Narjes
dc.contributor.authorCortina Pallás, José Luís
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.identifier.citationHermassi, M., Valderrama, C., Moreno, N., Font, O., Querol, X., Batis, N., Cortina, J. Powdered Ca-activated zeolite for phosphate removal from treated waste-water. "Journal of Chemical Technology and Biotechnology", juliol 2016, vol. 91, núm. 7, p. 1962–1971.
dc.description.abstractBackground: A powdered zeolitic material synthesised from fly ash (FA) (NaP1-FA) and its calcium modified form (CaP1-NA) were studied as sorbent materials for the recovery of phosphate from treated waste-water effluents. Phosphate-sorption equilibrium experiments were performed by varying the experimental conditions, including solution pH, phosphate concentration, and the presence of competing ions. Results: The maximum phosphate-sorption capacities were 57 ± 5 and 203 ± 11 mgP–PO4g-1 for NaP1-FA and CaP1-NA, respectively. The sorption capacities of both zeolites in the pH range expected for waste-water effluents (pH 7 to 9) were slightly dependent on pH, exhibiting maxima at pH 8. Phosphate removal proceeds through two main mechanisms: (a) surface complexation with ≅AlOH and ≅FeOH groups of the zeolitic structure or unreacted minerals from the FA; and (b) the formation of Ca–phosphate phases, mainly brushite. Conclusions: The removal mechanisms were confirmed by XRD analyses and P speciation. The stabilities of the phosphate-loaded zeolite samples evaluated by the extraction experiments confirmed their potential availabilities in soil applications. Finally, the higher solubility of brushite compared with that of Hap makes this zeolitic material promising as a novel inorganic zeolite/CaP1-NA/brushite fertiliser
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshWater--Purification--Phosphate removal
dc.subject.lcshSewage--Purification--Phosphate removal
dc.subject.lcshZeolites--Absorption and adsorption
dc.subject.lcshPhosphate minerals
dc.subject.otherCalcium modification
dc.subject.otherPhosphate recovery
dc.subject.otherPowder synthetic zeolite
dc.subject.otherWaste valorisation
dc.titlePowdered Ca-activated zeolite for phosphate removal from treated waste-water
dc.subject.lemacFosfats -- Absorció i adsorció
dc.subject.lemacResidus -- Anàlisi
dc.subject.lemacAigües residuals -- Depuració -- Eliminació de fosfats
dc.contributor.groupUniversitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.authorHermassi, M.; Valderrama, C.; Moreno, N.; Font, O.; Querol, X.; Batis, N.; Cortina, J.
local.citation.publicationNameJournal of Chemical Technology and Biotechnology

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