Silver and zinc oxide nanoparticle disinfection in water treatment applications: synergy and water quality influences

The synergistic potential of silver and zinc oxide nanoparticles for water disinfection was investigated herein. By causing cell death through membrane interactions, oxidative killing, and DNA deactivation, metallic nanoparticles may be integrated with point-of-use water treatment systems for applic...

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Autores principales:	Robbie A. Venis, Onita D. Basu
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	ceramic water filters drinking water low-cost disinfection metallic nanoparticles rural water supply River, lake, and water-supply engineering (General) TC401-506 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/54f6e063abd54407b76acbec4842c7fc
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spelling	oai:doaj.org-article:54f6e063abd54407b76acbec4842c7fc2021-11-08T07:59:37ZSilver and zinc oxide nanoparticle disinfection in water treatment applications: synergy and water quality influences2616-651810.2166/h2oj.2021.098https://doaj.org/article/54f6e063abd54407b76acbec4842c7fc2021-01-01T00:00:00Zhttp://doi.org/10.2166/h2oj.2021.098https://doaj.org/toc/2616-6518The synergistic potential of silver and zinc oxide nanoparticles for water disinfection was investigated herein. By causing cell death through membrane interactions, oxidative killing, and DNA deactivation, metallic nanoparticles may be integrated with point-of-use water treatment systems for applications in rural and remote geographies. Disinfection efficacy was evaluated in batch-phase experiments under both synthetic and real water conditions, where synthetic water was varied by pH and dissolved oxygen levels. Ceramic pot filters with comparative nanoparticle concentrations were also investigated. In all cases, combinations of silver and zinc nanoparticles resulted in improved disinfection in comparison to either metal in isolation. In batch experiments, dissolved oxygen proved to be particularly impactful, with kinetic rates reducing approximately 45% when in low oxygen environment (<3 mg/L) versus high oxygen (>8 mg/L). Log removal values (LRVs) were further, on average, 31% lower in real water than synthetic water after 300 min, though silver–zinc combinations were still superior to either metal alone. In filters, those impregnated with 67% silver and 33% zinc achieved average LRVs of 2.7 and 2.9 after 60 min of filtration and 24 h of storage, respectively, while those with only silver achieved average LRVs of 2.0 and 3.1 at those same times. HIGHLIGHTS Combining silver–zinc oxide nanoparticles improves disinfection in batch-phase and ceramic pot filter experiments.; Nanoparticle disinfection is vulnerable to changing water quality and particularly dissolved oxygen.; Zinc oxide supplementation of silver simultaneously improves effectiveness and reduces costs of water treatment solutions.;Robbie A. VenisOnita D. BasuIWA Publishingarticleceramic water filtersdrinking waterlow-cost disinfectionmetallic nanoparticlesrural water supplyRiver, lake, and water-supply engineering (General)TC401-506Water supply for domestic and industrial purposesTD201-500ENH2Open Journal, Vol 4, Iss 1, Pp 114-128 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ceramic water filters drinking water low-cost disinfection metallic nanoparticles rural water supply River, lake, and water-supply engineering (General) TC401-506 Water supply for domestic and industrial purposes TD201-500
spellingShingle	ceramic water filters drinking water low-cost disinfection metallic nanoparticles rural water supply River, lake, and water-supply engineering (General) TC401-506 Water supply for domestic and industrial purposes TD201-500 Robbie A. Venis Onita D. Basu Silver and zinc oxide nanoparticle disinfection in water treatment applications: synergy and water quality influences
description	The synergistic potential of silver and zinc oxide nanoparticles for water disinfection was investigated herein. By causing cell death through membrane interactions, oxidative killing, and DNA deactivation, metallic nanoparticles may be integrated with point-of-use water treatment systems for applications in rural and remote geographies. Disinfection efficacy was evaluated in batch-phase experiments under both synthetic and real water conditions, where synthetic water was varied by pH and dissolved oxygen levels. Ceramic pot filters with comparative nanoparticle concentrations were also investigated. In all cases, combinations of silver and zinc nanoparticles resulted in improved disinfection in comparison to either metal in isolation. In batch experiments, dissolved oxygen proved to be particularly impactful, with kinetic rates reducing approximately 45% when in low oxygen environment (<3 mg/L) versus high oxygen (>8 mg/L). Log removal values (LRVs) were further, on average, 31% lower in real water than synthetic water after 300 min, though silver–zinc combinations were still superior to either metal alone. In filters, those impregnated with 67% silver and 33% zinc achieved average LRVs of 2.7 and 2.9 after 60 min of filtration and 24 h of storage, respectively, while those with only silver achieved average LRVs of 2.0 and 3.1 at those same times. HIGHLIGHTS Combining silver–zinc oxide nanoparticles improves disinfection in batch-phase and ceramic pot filter experiments.; Nanoparticle disinfection is vulnerable to changing water quality and particularly dissolved oxygen.; Zinc oxide supplementation of silver simultaneously improves effectiveness and reduces costs of water treatment solutions.;
format	article
author	Robbie A. Venis Onita D. Basu
author_facet	Robbie A. Venis Onita D. Basu
author_sort	Robbie A. Venis
title	Silver and zinc oxide nanoparticle disinfection in water treatment applications: synergy and water quality influences
title_short	Silver and zinc oxide nanoparticle disinfection in water treatment applications: synergy and water quality influences
title_full	Silver and zinc oxide nanoparticle disinfection in water treatment applications: synergy and water quality influences
title_fullStr	Silver and zinc oxide nanoparticle disinfection in water treatment applications: synergy and water quality influences
title_full_unstemmed	Silver and zinc oxide nanoparticle disinfection in water treatment applications: synergy and water quality influences
title_sort	silver and zinc oxide nanoparticle disinfection in water treatment applications: synergy and water quality influences
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/54f6e063abd54407b76acbec4842c7fc
work_keys_str_mv	AT robbieavenis silverandzincoxidenanoparticledisinfectioninwatertreatmentapplicationssynergyandwaterqualityinfluences AT onitadbasu silverandzincoxidenanoparticledisinfectioninwatertreatmentapplicationssynergyandwaterqualityinfluences
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Silver and zinc oxide nanoparticle disinfection in water treatment applications: synergy and water quality influences

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