Electrochemically assisted photocatalysis for the disinfection of rainwater under solar irradiation

Stuart McMichael; Monique Waso; B  Reyneke; Wesaal  Khan; John Byrne; Pilar Fernandez-Ibanez

doi:10.1016/j.apcatb.2020.119485

Electrochemically assisted photocatalysis for the disinfection of rainwater under solar irradiation

Stuart McMichael, Monique Waso, B Reyneke, Wesaal Khan, John Byrne, Pilar Fernandez-Ibanez

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Abstract

In this work a photo electrochemical reactor (PEC) with a compound parabolic collector (CPC) has been designed and tested for the electrochemically assisted photocatalytic (EAP) disinfection of rainwater under real sun conditions in South Africa. The reactor consisted of a Ti mesh coated with aligned titania nanotubes with a carbon counter electrode in a concentric tubular configuration, within a borosilicate glass tube with a CPC. Environmental strains of Escherichia coli and Pseudomonas aeruginosa were used. The viability of the microorganisms was analysed by culture-based and by EMA-qPCR methods. The reactor was tested under real sun during the winter in South Africa with a relatively low UV irradiance (max: 13 Wm-2). Under real sun irradiation, EAP yielded a 5.5-log10 reduction for E. coli and a 5.8-log10 reduction for P. aeruginosa for culture-based analysis. The EAP treatment also showed improved results by EMA-qPCR analysis with a 2.4-log10 reduction in gene copies for E. coli and 3.0-log10 for P. aeruginosa.

Original language	English
Article number	119485
Journal	Applied Catalysis B: Environmental
Volume	281
Early online date	28 Aug 2020
DOIs	https://doi.org/10.1016/j.apcatb.2020.119485
Publication status	Published (in print/issue) - 28 Feb 2021

Bibliographical note

Funding Information:
The authors wish to acknowledge the Department for Economy (DfE) Northern Ireland for funding Stuart McMichael, the Global Challenges Research Fund (GCRF) UK Research and Innovation for funding SAFEWATER (Grant Reference EP/P032427/1) and the Royal Society for funding the Newton Mobility Grant award (NI170184).

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

EMA-qPCR
Electrochemically assisted photocatalysis
Pseudomonas aeruginosa
Solar disinfection
TiO Nanotubes

UN SDGs

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

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10.1016/j.apcatb.2020.119485Licence: CC BY-NC-ND

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Cite this

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title = "Electrochemically assisted photocatalysis for the disinfection of rainwater under solar irradiation",

abstract = "In this work a photo electrochemical reactor (PEC) with a compound parabolic collector (CPC) has been designed and tested for the electrochemically assisted photocatalytic (EAP) disinfection of rainwater under real sun conditions in South Africa. The reactor consisted of a Ti mesh coated with aligned titania nanotubes with a carbon counter electrode in a concentric tubular configuration, within a borosilicate glass tube with a CPC. Environmental strains of Escherichia coli and Pseudomonas aeruginosa were used. The viability of the microorganisms was analysed by culture-based and by EMA-qPCR methods. The reactor was tested under real sun during the winter in South Africa with a relatively low UV irradiance (max: 13 Wm-2). Under real sun irradiation, EAP yielded a 5.5-log10 reduction for E. coli and a 5.8-log10 reduction for P. aeruginosa for culture-based analysis. The EAP treatment also showed improved results by EMA-qPCR analysis with a 2.4-log10 reduction in gene copies for E. coli and 3.0-log10 for P. aeruginosa.",

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note = "Funding Information: The authors wish to acknowledge the Department for Economy (DfE) Northern Ireland for funding Stuart McMichael, the Global Challenges Research Fund (GCRF) UK Research and Innovation for funding SAFEWATER (Grant Reference EP/P032427/1) and the Royal Society for funding the Newton Mobility Grant award (NI170184). Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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N2 - In this work a photo electrochemical reactor (PEC) with a compound parabolic collector (CPC) has been designed and tested for the electrochemically assisted photocatalytic (EAP) disinfection of rainwater under real sun conditions in South Africa. The reactor consisted of a Ti mesh coated with aligned titania nanotubes with a carbon counter electrode in a concentric tubular configuration, within a borosilicate glass tube with a CPC. Environmental strains of Escherichia coli and Pseudomonas aeruginosa were used. The viability of the microorganisms was analysed by culture-based and by EMA-qPCR methods. The reactor was tested under real sun during the winter in South Africa with a relatively low UV irradiance (max: 13 Wm-2). Under real sun irradiation, EAP yielded a 5.5-log10 reduction for E. coli and a 5.8-log10 reduction for P. aeruginosa for culture-based analysis. The EAP treatment also showed improved results by EMA-qPCR analysis with a 2.4-log10 reduction in gene copies for E. coli and 3.0-log10 for P. aeruginosa.

AB - In this work a photo electrochemical reactor (PEC) with a compound parabolic collector (CPC) has been designed and tested for the electrochemically assisted photocatalytic (EAP) disinfection of rainwater under real sun conditions in South Africa. The reactor consisted of a Ti mesh coated with aligned titania nanotubes with a carbon counter electrode in a concentric tubular configuration, within a borosilicate glass tube with a CPC. Environmental strains of Escherichia coli and Pseudomonas aeruginosa were used. The viability of the microorganisms was analysed by culture-based and by EMA-qPCR methods. The reactor was tested under real sun during the winter in South Africa with a relatively low UV irradiance (max: 13 Wm-2). Under real sun irradiation, EAP yielded a 5.5-log10 reduction for E. coli and a 5.8-log10 reduction for P. aeruginosa for culture-based analysis. The EAP treatment also showed improved results by EMA-qPCR analysis with a 2.4-log10 reduction in gene copies for E. coli and 3.0-log10 for P. aeruginosa.

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Electrochemically assisted photocatalysis for the disinfection of rainwater under solar irradiation

Abstract

Bibliographical note

Keywords

UN SDGs

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