Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/15353 |
Resumo: | A 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. |
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Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidationOzone membrane contactorOzone gas/water mass transferOzone dosingMicropollutantsPhotocatalytic ozonationA 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.ElsevierBiblioteca Digital do IPBPresumido, Pedro HenriqueMontes, RosaQuintana, Jose B.Rodil, RosarioFeliciano, ManuelLi Puma, GianlucaGomes, Ana I.Vilar, Vítor J.P.2018-01-31T10:00:00Z20222022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/15353engHenrique 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. 1-132213-29292213-3437info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-21T10:35:54Zoai:bibliotecadigital.ipb.pt:10198/15353Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:04:58.083720Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation |
title |
Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation |
spellingShingle |
Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation Presumido, Pedro Henrique Ozone membrane contactor Ozone gas/water mass transfer Ozone dosing Micropollutants Photocatalytic ozonation |
title_short |
Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation |
title_full |
Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation |
title_fullStr |
Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation |
title_full_unstemmed |
Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation |
title_sort |
Ozone membrane contactor to intensify gas/liquid mass transfer and contaminants of emerging concern oxidation |
author |
Presumido, Pedro Henrique |
author_facet |
Presumido, Pedro Henrique Montes, Rosa Quintana, Jose B. Rodil, Rosario Feliciano, Manuel Li Puma, Gianluca Gomes, Ana I. Vilar, Vítor J.P. |
author_role |
author |
author2 |
Montes, Rosa Quintana, Jose B. Rodil, Rosario Feliciano, Manuel Li Puma, Gianluca Gomes, Ana I. Vilar, Vítor J.P. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Presumido, Pedro Henrique Montes, Rosa Quintana, Jose B. Rodil, Rosario Feliciano, Manuel Li Puma, Gianluca Gomes, Ana I. Vilar, Vítor J.P. |
dc.subject.por.fl_str_mv |
Ozone membrane contactor Ozone gas/water mass transfer Ozone dosing Micropollutants Photocatalytic ozonation |
topic |
Ozone membrane contactor Ozone gas/water mass transfer Ozone dosing Micropollutants Photocatalytic ozonation |
description |
A 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. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-31T10:00:00Z 2022 2022-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10198/15353 |
url |
http://hdl.handle.net/10198/15353 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Henrique 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. 1-13 2213-2929 2213-3437 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799135298279440384 |