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Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation

2022Journal article Open access
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dc.contributor.authorPresumido, Pedro Henrique
dc.contributor.authorMontes, Rosa
dc.contributor.authorQuintana, Jose B.
dc.contributor.authorRodil, Rosário
dc.contributor.authorFeliciano, Manuel
dc.contributor.authorLi Puma, Gianluca
dc.contributor.authorGomes, Ana I.
dc.contributor.authorVilar, Vítor J.P.
dc.date.accessioned2018-01-31T10:00:00Z
dc.date.accessioned2018-01-31T15:40:26Z
dc.date.available2018-01-31T10:00:00Z
dc.date.issued2022
dc.description.abstractA tubular porous borosilicate membrane contactor was investigated for ozone gas/water mass transfer and the removal of contaminants of emerging concern (CECs) in water. Ozone gas/water contact occurs on the mem-brane shell-side, which is coated with a photocatalyst (TiO2-P25), as the ozone gas stream is fed from the lumen side and permeates through the pores generating micro-sized ozone bubbles uniformly delivered to the annular reaction zone where the contaminated water to be treated flows. Under continuous flow, water pH at 3.0 and temperature at 20 oC, the volumetric mass transfer coefficient (KLa) ranged from 3.5 to 9.0 min- 1 and improved with the increase of gas flow rate (QG, 1.5-fold from 0.15 to 1.0 Ndm3 min-1) and liquid flow rate (QL, 2.0-fold from 20 to 50 L h-1), due to enhanced turbulence on the membrane shell-side and annular zone. The mass transfer efficiency was more pronounced as the QG decreased and the QL increased, which is advantageous for large-scale applications. The main resistances to ozone transfer were in the water phase boundary layer (53-76%) and in the membrane (24-47%; kM = (1.14 +/- 0.01) x 10-4 m s-1). For an ozone dose of 12 g m- 3 and residence time of 3.9 s, removals >= 80% were achieved for 13 of 19 CECs spiked in demineralized water (each 10 mu g L-1), demonstrating the applicability of this membrane contactor for ozonation treatment. Photocatalytic ozonation (O3/UVC/TiO2) did not significantly improve the treatment performance due to the low residence time inside the contactor.en_EN
dc.description.versioninfo:eu-repo/semantics/publishedVersionen_EN
dc.identifier.citationHenrique Presumido, Pedro; Montes, Rosa; Quintana, Jose B.; Rodil, Rosario; Feliciano, Manuel; Li Puma, Gianluca; Gomes, Ana I.; Vilar, Vítor J. P.. (2022). Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation. Journal Of Environmental Chemical Engineering. EISSN 2213-3437. 10:6, p. 1-13en_EN
dc.identifier.eissn2213-3437
dc.identifier.issn2213-2929
dc.identifier.urihttp://hdl.handle.net/10198/15353
dc.language.isoeng
dc.peerreviewedyesen_EN
dc.publisherElsevier
dc.subjectOzone membrane contactoren_EN
dc.subjectOzone gas/water mass transferen_EN
dc.subjectOzone dosingen_EN
dc.subjectMicropollutantsen_EN
dc.subjectPhotocatalytic ozonationen_EN
dc.titleOzone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidationen_EN
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleJournal of Environmental Chemical Engineering
person.familyNameFeliciano
person.givenNameManuel
person.identifier.ciencia-id2D11-7230-702B
person.identifier.orcid0000-0002-3147-4511
person.identifier.scopus-author-id6603358480
rcaap.rightsopenAccessen_EN
rcaap.typearticleen_EN
relation.isAuthorOfPublicationccb9c69d-2820-493b-ab44-77b0538814fa
relation.isAuthorOfPublication.latestForDiscoveryccb9c69d-2820-493b-ab44-77b0538814fa

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