Suppressing cyanobacterial dominance by UV-LED TiO2-photocatalysis in a drinking water reservoir: a mesocosm study

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-photocatalysis in a drinking water reservoir: a mesocosm study

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Cyanobacteria and their toxic secondary metabolites present challenges for water treatment globally. In this study we have assessed TiO₂ 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.

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	Published - 1 Nov 2022

Keywords

Phytoplankton
Advanced oxidation processes
Water quality
Microbial community
16S/18S rRNA sequencing
Mesocosm

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10.1016/j.watres.2022.119299Licence: CC BY

Pestana_2022_WR_Suppressing-cyanobacterial_CC
Copyright © 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Final published version, 11.1 MBLicence: CC BY

In-reservoir destruction: In-reservoir destruction of Blue-Green Algae and their toxins
Irvine, J. T. S. (PI)
EPSRC
1/05/17 → 31/08/21
Project: Standard

Cite this

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-photocatalysis in a drinking water reservoir: a mesocosm study. Water Research, 226, Article 119299. https://doi.org/10.1016/j.watres.2022.119299

@article{e6bb1aa112c14f79971814704dd841fe,

title = "Suppressing cyanobacterial dominance by UV-LED TiO2-photocatalysis in a drinking water reservoir: a mesocosm study",

abstract = "Cyanobacteria and their toxic secondary metabolites present challenges for water treatment globally. In this study we have assessed TiO2 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.",

keywords = "Phytoplankton, Advanced oxidation processes, Water quality, Microbial community, 16S/18S rRNA sequencing, Mesocosm",

author = "Pestana, {Carlos J.} and Santos, {Allan A.} and Jos{\'e} Capelo-Neto and Melo, {V{\^a}nia M.M.} and Reis, {Kelly C.} and Samylla Oliveira and Ricardo Rogers and Pacheco, {Ana B.F.} and Jianing Hui and Skillen, {Nathan C.} and Barros, {M{\'a}rio U.G.} and Christine Edwards and Azevedo, {Sandra M.F.O.} and Robertson, {Peter K.J.} and Irvine, {John T.S.} and Lawton, {Linda A.}",

note = "Funding: The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC) [EP/P029280/1], the Coordination for the Improvement of Higher Education Personnel - CAPES [PROEX 20/2016 and Print 88887.311806/2018-00], the Brazilian National Research Council – CNPq [403116/2016-3 and 304164/2017-8] and the Cear{\'a} Research Support Foundation - FUNCAP [PNE-0112-00042.01.00/16] for funding this research.",

year = "2022",

month = nov,

day = "1",

doi = "10.1016/j.watres.2022.119299",

language = "English",

volume = "226",

journal = "Water Research",

issn = "0043-1354",

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Pestana, CJ, Santos, AA, Capelo-Neto, J, Melo, VMM, Reis, KC, Oliveira, S, Rogers, R, Pacheco, ABF, Hui, J, Skillen, NC, Barros, MUG, Edwards, C, Azevedo, SMFO, Robertson, PKJ, Irvine, JTS & Lawton, LA 2022, 'Suppressing cyanobacterial dominance by UV-LED TiO₂-photocatalysis in a drinking water reservoir: a mesocosm study', Water Research, vol. 226, 119299. https://doi.org/10.1016/j.watres.2022.119299

TY - JOUR

T1 - Suppressing cyanobacterial dominance by UV-LED TiO2-photocatalysis in a drinking water reservoir

T2 - a mesocosm study

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.

N1 - Funding: The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC) [EP/P029280/1], the Coordination for the Improvement of Higher Education Personnel - CAPES [PROEX 20/2016 and Print 88887.311806/2018-00], the Brazilian National Research Council – CNPq [403116/2016-3 and 304164/2017-8] and the Ceará Research Support Foundation - FUNCAP [PNE-0112-00042.01.00/16] for funding this research.

PY - 2022/11/1

Y1 - 2022/11/1

N2 - Cyanobacteria and their toxic secondary metabolites present challenges for water treatment globally. In this study we have assessed TiO2 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.

AB - Cyanobacteria and their toxic secondary metabolites present challenges for water treatment globally. In this study we have assessed TiO2 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.

KW - Phytoplankton

KW - Advanced oxidation processes

KW - Water quality

KW - Microbial community

KW - 16S/18S rRNA sequencing

KW - Mesocosm

U2 - 10.1016/j.watres.2022.119299

DO - 10.1016/j.watres.2022.119299

M3 - Article

SN - 0043-1354

VL - 226

JO - Water Research

JF - Water Research

M1 - 119299

ER -

Suppressing cyanobacterial dominance by UV-LED TiO2-photocatalysis in a drinking water reservoir: a mesocosm study

Abstract

Keywords

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Projects

In-reservoir destruction: In-reservoir destruction of Blue-Green Algae and their toxins

Cite this

Suppressing cyanobacterial dominance by UV-LED TiO₂-photocatalysis in a drinking water reservoir: a mesocosm study