| Autor: |
Tsiarta N; Catalan Institute of Water Research, Carrer Emili Grahit 101, 17003 Girona, Spain.; Campus de Montilivi, University of Girona, 17003 Girona, Spain.; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10002 Zagreb, Croatia., Morović S; Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia., Mandić V; Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia., Panžić I; Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia., Blažic R; Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia., Ćurković L; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10002 Zagreb, Croatia., Gernjak W; Catalan Institute of Water Research, Carrer Emili Grahit 101, 17003 Girona, Spain.; Catalan Institution for Research and Advanced Studies (ICREA), 08010 Barcelona, Spain. |
| Abstrakt: |
The removal of persistent organic micropollutants (OMPs) from secondary effluent in wastewater treatment plants is critical for meeting water reuse standards. Traditional treatment methods often fail to adequately degrade these contaminants. This study explored the efficacy of a hybrid ozonation membrane filtration (HOMF) process using CeO 2 and CeTiO x -doped ceramic crossflow ultrafiltration ceramic membranes for the degradation of OMPs. Hollow ceramic membranes (CM) with a 300 kDa molecular weight cut-off (MWCO) were modified to serve as substrates for catalytic nanosized metal oxides in a crossflow and inside-out operational configuration. Three types of depositions were tested: a single layer of CeO 2 , a single layer of CeTiO x , and a combined layer of CeO 2 + CeTiO x . These catalytic nanoparticles were distributed uniformly using a solution-based method supported by vacuum infiltration to ensure high-throughput deposition. The results demonstrated successful infiltration of the metal oxides, although the yield permeability and transmembrane flow varied, following this order: pristine > CeTiO x > CeO 2 > CeO 2 + CeTiO x . Four OMPs were examined: two easily degraded by ozone (carbamazepine and diclofenac) and two recalcitrant (ibuprofen and pCBA). The highest OMP degradation was observed in demineralized water, particularly with the CeO 2 + CeTiO x modification, suggesting O 3 decomposition to hydroxyl radicals. The increased resistance in the modified membranes contributed to the adsorption phenomena. The degradation efficiency decreased in secondary effluent due to competition with the organic and inorganic load, highlighting the challenges in complex water matrices. |
