000133295 001__ 133295
000133295 005__ 20240410085329.0
000133295 0247_ $$2doi$$a10.1016/j.seppur.2024.127042
000133295 0248_ $$2sideral$$a137942
000133295 037__ $$aART-2024-137942
000133295 041__ $$aeng
000133295 100__ $$aSantoro, Sergio
000133295 245__ $$aGreen photocatalytic mixed matrix membranes for simultaneous arsenic photo-oxidation and water recovery via membrane distillation
000133295 260__ $$c2024
000133295 5060_ $$aAccess copy available to the general public$$fUnrestricted
000133295 5203_ $$aThis work proposes an innovative integration of Membrane Distillation (MD) and photo-oxidation for a continuous recovery of water from arsenic (As) contaminated solutions coupled with the oxidation of arsenite (As(III)) into arsenate (As(V)). Polyvinylidene fluoride (PVDF) mixed matrix membranes (MMMs) containing titanium dioxide nanoparticles (TiO2 NPs) as photocatalyst were developed. A systematic study elucidated the effect of TiO2 NPs on membranes’ morphology prepared via non-solvent-induced phase separation (NIPS) using triethyl phosphate (TEP) as a green solvent for PVDF solubilization. Vacuum membrane distillation (VMD) tests carried out by irradiating the MMMs with ultraviolet (UV) radiation demonstrated the possibility of recovering up to 80 % of the water from As-contaminated synthetic and real multi-ions aqueous solutions from Sila Massif (Italy). The distillate was recovered at a rate of 6.9–7.2 kg·m−2·h−1 (feed inlet temperature of 60 °C), while the presence of 7 wt% of TiO2 in PVDF membranes enabled the photo-oxidation of 95 % of the As(III) to As(V) at a first order kinetic constant of 0.0106 min−1. After 5 cycles of As-remediation experiments, post-hoc mechanical testing on the membrane suggested the emergence of polymer embrittlement induced by UV radiation (total irradiation time of 7.5 h), highlighting the urgent need for developing photocatalytic membranes with long-term stability.
Overall, this study elucidates at laboratory scale the performance of a coupled and continuous Membrane Distillation (MD) and photo-oxidation system for arsenic (As) remediation, employing microporous hydrophobic green membranes doped with a photocatalyst.
000133295 536__ $$9info:eu-repo/grantAgreement/EC/H2020/823948/EU/Renewable Energies for Water Treatment and REuse in Mining Industries/REMIND$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 823948-REMIND
000133295 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000133295 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000133295 700__ $$aOcchiuzzi, Jessica
000133295 700__ $$aAquino, Marco
000133295 700__ $$aPolitano, Antonio
000133295 700__ $$aStraface, Salvatore
000133295 700__ $$aD'Andrea, Giuseppe
000133295 700__ $$aCarrillo, Cristobal
000133295 700__ $$0(orcid)0000-0002-4758-9380$$aMallada, Reyes$$uUniversidad de Zaragoza
000133295 700__ $$aGarcia, Andreina
000133295 700__ $$aEstay, Humberto
000133295 700__ $$aXevgenos, Dimitrios
000133295 700__ $$aArgurio, Pietro
000133295 700__ $$aCurcio, Efrem
000133295 7102_ $$15005$$2555$$aUniversidad de Zaragoza$$bDpto. Ing.Quím.Tecnol.Med.Amb.$$cÁrea Ingeniería Química
000133295 773__ $$g342 (2024), 127042 [11 pp.]$$pSep. Purif. Technol.$$tSeparation and Purification Technology$$x1383-5866
000133295 8564_ $$s3549731$$uhttps://zaguan.unizar.es/record/133295/files/texto_completo.pdf$$yVersión publicada
000133295 8564_ $$s2552862$$uhttps://zaguan.unizar.es/record/133295/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000133295 909CO $$ooai:zaguan.unizar.es:133295$$particulos$$pdriver
000133295 951__ $$a2024-04-10-08:38:57
000133295 980__ $$aARTICLE