A two-stage degradation coupling photocatalysis to microalgae enhances the mineralization of enrofloxacin.

Lu, Z; Xu, Y; Peng, L; Liang, C; Liu, Y; Ni, B-J

A two-stage degradation coupling photocatalysis to microalgae enhances the mineralization of enrofloxacin.

Lu, Z Xu, Y Peng, L Liang, C Liu, Y

Ni, B-J

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Chemosphere, 2022, 293, pp. 133523
Issue Date:: 2022-04

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Field	Value	Language
dc.contributor.author	Lu, Z
dc.contributor.author	Xu, Y
dc.contributor.author	Peng, L
dc.contributor.author	Liang, C
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961
dc.contributor.author	Ni, B-J
dc.date.accessioned	2023-03-19T23:43:52Z
dc.date.available	2022-01-01
dc.date.available	2023-03-19T23:43:52Z
dc.date.issued	2022-04
dc.identifier.citation	Chemosphere, 2022, 293, pp. 133523
dc.identifier.issn	0045-6535
dc.identifier.issn	1879-1298
dc.identifier.uri	http://hdl.handle.net/10453/167629
dc.description.abstract	The coupling of photocatalytic and algal processes has been used for the removal of widespread antibiotics. The removal capacities of the individual and the combined system against enrofloxacin were tested and compared in this work. Due to the low tolerance of the algae to enrofloxacin, the target compound was barely degraded during the individual algal treatment. In the individual photocatalytic process, the mineralization efficiency (defined as the ratio between the produced carbon dioxide and the initial) reached ∼57% with the remaining formed as transformation products. In contrast, a two-stage treatment incorporating photocatalytic and algal processes removed enrofloxacin completely and increased the mineralization efficiency to ∼64% or more. The addition of the citric acid as external co-substrate further elevated the mineralization efficiency with a factor of 1.25 compared to that of the individual photocatalysis. Different degradation products in both individual and integrated processes were identified and compared. The degradation pathways were found to involve the attack of the piperazine moiety and quinolone core. The results indicated the potential application of the combined photocatalytic-algal treatment in removal of veterinary antibiotics and improved our understanding of the underlying mechanisms and pathways.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Chemosphere
dc.relation.isbasedon	10.1016/j.chemosphere.2022.133523
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.subject.mesh	Anti-Bacterial Agents
dc.subject.mesh	Catalysis
dc.subject.mesh	Enrofloxacin
dc.subject.mesh	Microalgae
dc.subject.mesh	Anti-Bacterial Agents
dc.subject.mesh	Catalysis
dc.subject.mesh	Microalgae
dc.subject.mesh	Enrofloxacin
dc.subject.mesh	Anti-Bacterial Agents
dc.subject.mesh	Catalysis
dc.subject.mesh	Enrofloxacin
dc.subject.mesh	Microalgae
dc.title	A two-stage degradation coupling photocatalysis to microalgae enhances the mineralization of enrofloxacin.
dc.type	Journal Article
utslib.citation.volume	293
utslib.location.activity	England
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-19T23:43:51Z
pubs.publication-status	Published
pubs.volume	293

Abstract:

The coupling of photocatalytic and algal processes has been used for the removal of widespread antibiotics. The removal capacities of the individual and the combined system against enrofloxacin were tested and compared in this work. Due to the low tolerance of the algae to enrofloxacin, the target compound was barely degraded during the individual algal treatment. In the individual photocatalytic process, the mineralization efficiency (defined as the ratio between the produced carbon dioxide and the initial) reached ∼57% with the remaining formed as transformation products. In contrast, a two-stage treatment incorporating photocatalytic and algal processes removed enrofloxacin completely and increased the mineralization efficiency to ∼64% or more. The addition of the citric acid as external co-substrate further elevated the mineralization efficiency with a factor of 1.25 compared to that of the individual photocatalysis. Different degradation products in both individual and integrated processes were identified and compared. The degradation pathways were found to involve the attack of the piperazine moiety and quinolone core. The results indicated the potential application of the combined photocatalytic-algal treatment in removal of veterinary antibiotics and improved our understanding of the underlying mechanisms and pathways.

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http://hdl.handle.net/10453/167629