Microcystis aeruginosa synergistically facilitate the photocatalytic degradation of tetracycline hydrochloride and Cr(VI) on PAN/TiO2/Ag nanofiber mats

Wang, L., Zhang, C., Cheng, R., Ali, J., Wang, Z., Mailhot, G. and Pan, G. ORCID: 0000-0003-0920-3018, 2018. Microcystis aeruginosa synergistically facilitate the photocatalytic degradation of tetracycline hydrochloride and Cr(VI) on PAN/TiO2/Ag nanofiber mats. Catalysts, 8 (12): 628. ISSN 2073-4344

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Abstract

Cyanobacterial blooms can cause serious damage to aquatic ecosystems. However, we have demonstrated that typical algae-blooming species Microcystis aeruginosa (M. aeruginosa) combined with photocatalysts could synergistically facilitate the photodecontamination of tetracycline hydrochloride (TC) and Cr(VI). In this study, for the first time, harmful algae were successfully converted into photoreactive bionano hybrid materials by immobilizing M. aeruginosa cells onto polyacrylonitrile (PAN)-TiO2/Ag hybrid nanofibers, and their photocatalytic activity was evaluated. The addition of M. aeruginosa significantly improved the photodecontamination, and the reaction rate constant (k) values of TC and Cr(VI) degradation by M. aeruginosa-PAN/TiO2/Ag nanofiber mats were 2.4 and 1.5-fold higher than that of bare PAN/TiO2/Ag nanofiber. Photoreaction caused damage to algae cells, but no microcystin was found that had been photodegraded simultaneously. The effects of various active species were also investigated, and the photodegradation mechanism was proposed. Recycling tests revealed that this flexible M. aeruginosa-PAN/TiO2/Ag hybrid mat had potential application in the removal of mixed organic and inorganic pollutants with high efficiency and without secondary pollutants. Thus, harmful algae blooms could serve as an efficient materials to remove toxic pollutants in a sustainable way under visible light irradiation.

Item Type:	Journal article
Publication Title:	Catalysts
Creators:	Wang, L., Zhang, C., Cheng, R., Ali, J., Wang, Z., Mailhot, G. and Pan, G.
Publisher:	MDPI
Date:	5 December 2018
Volume:	8
Number:	12
ISSN:	2073-4344
Identifiers:	Number Type 10.3390/catal8120628 DOI catal8120628 Publisher Item Identifier
Rights:	This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
Divisions:	Schools > School of Animal, Rural and Environmental Sciences
Record created by:	Jonathan Gallacher
Date Added:	14 Dec 2018 10:12
Last Modified:	14 Dec 2018 10:16
URI:	https://irep.ntu.ac.uk/id/eprint/35328

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