Suppressing cyanobacterial dominance by UV-LED TiO2

Carlos J Pestana; Allan A Santos; José Capelo-Neto; Vânia M M Melo; Kelly C Reis; Samylla Oliveira; Ricardo Rogers; Ana B F Pacheco; Jianing Hui; Nathan C Skillen; Mário U G Barros; Christine Edwards; Sandra M F O Azevedo; Peter K J Robertson; John T S Irvine; Linda A Lawton

doi:10.1016/j.watres.2022.119299

Suppressing cyanobacterial dominance by UV-LED TiO2

Carlos J Pestana, Allan A Santos, José Capelo-Neto, Vânia M M Melo, Kelly C Reis, Samylla Oliveira, Ricardo Rogers, Ana B F Pacheco, Jianing Hui, Nathan C Skillen, Mário U G Barros, Christine Edwards, Sandra M F O Azevedo, Peter K J Robertson, John T S Irvine, Linda A Lawton

School of Chemistry and Chemical Engineering

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Abstract

Cyanobacteria and their toxic secondary metabolites present challenges for water treatment globally. In this study we have assessed TiO immobilized onto recycled foamed glass beads by a facile calcination method, combined in treatment units with 365 nm UV-LEDs. The treatment system was deployed in mesocosms within a eutrophic Brazilian drinking water reservoir. The treatment units were deployed for 7 days and suppressed cyanobacterial abundance by 85% while at the same time enhancing other water quality parameters; turbidity and transparency improved by 40 and 81% respectively. Genomic analysis of the microbiota in the treated mesocosms revealed that the composition of the cyanobacterial community was affected and the abundance of Bacteroidetes and Proteobacteria increased during cyanobacterial suppression. The effect of the treatment on zooplankton and other eukaryotes was also monitored. The abundance of zooplankton decreased while Chrysophyte and Alveolata loadings increased. The results of this proof-of-concept study demonstrate the potential for full-scale, in-reservoir application of advanced oxidation processes as complementary water treatment processes. [Abstract copyright: Copyright © 2022 The Author(s). Published by Elsevier Ltd.. All rights reserved.]

Original language	English
Article number	119299
Number of pages	13
Journal	Water research
Volume	226
Early online date	31 Oct 2022
DOIs	https://doi.org/10.1016/j.watres.2022.119299
Publication status	Early online date - 31 Oct 2022

Keywords

Zooplankton
Titanium
Drinking Water
Advanced oxidation processes
Mesocosm
Animals
Phytoplankton
Cyanobacteria
Water quality
16S/18S rRNA sequencing
Microbial community

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.watres.2022.119299Licence: CC BY

Suppressing cyanobacterial dominance by UV-LED TiO2
© 2022 The Authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Final published version, 11.1 MBLicence: CC BY

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Pestana, C. J., Santos, A. A., Capelo-Neto, J., Melo, V. M. M., Reis, K. C., Oliveira, S., Rogers, R., Pacheco, A. B. F., Hui, J., Skillen, N. C., Barros, M. U. G., Edwards, C., Azevedo, S. M. F. O., Robertson, P. K. J., Irvine, J. T. S., & Lawton, L. A. (2022). Suppressing cyanobacterial dominance by UV-LED TiO2. Water research, 226, Article 119299. Advance online publication. https://doi.org/10.1016/j.watres.2022.119299

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abstract = "Cyanobacteria and their toxic secondary metabolites present challenges for water treatment globally. In this study we have assessed TiO immobilized onto recycled foamed glass beads by a facile calcination method, combined in treatment units with 365 nm UV-LEDs. The treatment system was deployed in mesocosms within a eutrophic Brazilian drinking water reservoir. The treatment units were deployed for 7 days and suppressed cyanobacterial abundance by 85% while at the same time enhancing other water quality parameters; turbidity and transparency improved by 40 and 81% respectively. Genomic analysis of the microbiota in the treated mesocosms revealed that the composition of the cyanobacterial community was affected and the abundance of Bacteroidetes and Proteobacteria increased during cyanobacterial suppression. The effect of the treatment on zooplankton and other eukaryotes was also monitored. The abundance of zooplankton decreased while Chrysophyte and Alveolata loadings increased. The results of this proof-of-concept study demonstrate the potential for full-scale, in-reservoir application of advanced oxidation processes as complementary water treatment processes. [Abstract copyright: Copyright {\textcopyright} 2022 The Author(s). Published by Elsevier Ltd.. All rights reserved.]",

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AU - Pestana, Carlos J

AU - Santos, Allan A

AU - Capelo-Neto, José

AU - Melo, Vânia M M

AU - Reis, Kelly C

AU - Oliveira, Samylla

AU - Rogers, Ricardo

AU - Pacheco, Ana B F

AU - Hui, Jianing

AU - Skillen, Nathan C

AU - Barros, Mário U G

AU - Edwards, Christine

AU - Azevedo, Sandra M F O

AU - Robertson, Peter K J

AU - Irvine, John T S

AU - Lawton, Linda A

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N2 - Cyanobacteria and their toxic secondary metabolites present challenges for water treatment globally. In this study we have assessed TiO immobilized onto recycled foamed glass beads by a facile calcination method, combined in treatment units with 365 nm UV-LEDs. The treatment system was deployed in mesocosms within a eutrophic Brazilian drinking water reservoir. The treatment units were deployed for 7 days and suppressed cyanobacterial abundance by 85% while at the same time enhancing other water quality parameters; turbidity and transparency improved by 40 and 81% respectively. Genomic analysis of the microbiota in the treated mesocosms revealed that the composition of the cyanobacterial community was affected and the abundance of Bacteroidetes and Proteobacteria increased during cyanobacterial suppression. The effect of the treatment on zooplankton and other eukaryotes was also monitored. The abundance of zooplankton decreased while Chrysophyte and Alveolata loadings increased. The results of this proof-of-concept study demonstrate the potential for full-scale, in-reservoir application of advanced oxidation processes as complementary water treatment processes. [Abstract copyright: Copyright © 2022 The Author(s). Published by Elsevier Ltd.. All rights reserved.]

AB - Cyanobacteria and their toxic secondary metabolites present challenges for water treatment globally. In this study we have assessed TiO immobilized onto recycled foamed glass beads by a facile calcination method, combined in treatment units with 365 nm UV-LEDs. The treatment system was deployed in mesocosms within a eutrophic Brazilian drinking water reservoir. The treatment units were deployed for 7 days and suppressed cyanobacterial abundance by 85% while at the same time enhancing other water quality parameters; turbidity and transparency improved by 40 and 81% respectively. Genomic analysis of the microbiota in the treated mesocosms revealed that the composition of the cyanobacterial community was affected and the abundance of Bacteroidetes and Proteobacteria increased during cyanobacterial suppression. The effect of the treatment on zooplankton and other eukaryotes was also monitored. The abundance of zooplankton decreased while Chrysophyte and Alveolata loadings increased. The results of this proof-of-concept study demonstrate the potential for full-scale, in-reservoir application of advanced oxidation processes as complementary water treatment processes. [Abstract copyright: Copyright © 2022 The Author(s). Published by Elsevier Ltd.. All rights reserved.]

KW - Zooplankton

KW - Titanium

KW - Drinking Water

KW - Advanced oxidation processes

KW - Mesocosm

KW - Animals

KW - Phytoplankton

KW - Cyanobacteria

KW - Water quality

KW - 16S/18S rRNA sequencing

KW - Microbial community

U2 - 10.1016/j.watres.2022.119299

DO - 10.1016/j.watres.2022.119299

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SN - 1879-2448

VL - 226

JO - Water research

JF - Water research

M1 - 119299

ER -

Suppressing cyanobacterial dominance by UV-LED TiO2

Abstract

Keywords

UN SDGs

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