High frequency ultrasonication enhances iron-catalyzed sulphate inactivation of Escherichia coli and Staphylococcus aureus

The ability of high frequency ultrasonication to improve sulphate radical-based water disinfection was investigated in the laboratory. Low doses of potassium persulfate and zero-valent iron inactivated Escherichia coli (5.74 log) and Staphylococcus aureus (4.82 log) within 40 min when supported by 6...

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Autores principales:	Xiaoge Wu, Lei Yan, Guofeng Xu, Xiaozhi Wang, JuanJuan Wang, Dionysios D. Dionysiou
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Ultrasound Persulfate Bacteria inactivation Escherichia coli Staphylococcus aureus Chemical engineering TP155-156
Acceso en línea:	https://doaj.org/article/45d10a8f4626429eb6039af471aca4a1
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spelling	oai:doaj.org-article:45d10a8f4626429eb6039af471aca4a12021-11-18T04:53:03ZHigh frequency ultrasonication enhances iron-catalyzed sulphate inactivation of Escherichia coli and Staphylococcus aureus2666-821110.1016/j.ceja.2021.100170https://doaj.org/article/45d10a8f4626429eb6039af471aca4a12021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666821121000867https://doaj.org/toc/2666-8211The ability of high frequency ultrasonication to improve sulphate radical-based water disinfection was investigated in the laboratory. Low doses of potassium persulfate and zero-valent iron inactivated Escherichia coli (5.74 log) and Staphylococcus aureus (4.82 log) within 40 min when supported by 600 kHz ultrasound applied at 3.09 W/mL. That was far better than the removal with potassium persulfate and iron alone, since neither PS nor Fe0 showed any killing effect on bacterial cells. Ultrasound at 3.09 W/mL was twice as effective as ultrasound at 6.81 W/mL with both bacteria. Nonlinear double Weibull and modified Hom models fitted the data well, showing an initial lag in the rate. SO4•ˉ made a greater contribution to the inactivation than •OH, but both induced cell lesioning, leakage and intracellular oxidation. The delivery effect mediated by 600 kHz ultrasound may promote the intracellular oxidation toward bacteria inactivation. Avoiding consumption by other competing impurities in water, further development should focus on the improvement of the utilization of SO4•ˉ generated for more efficient delivery for intracellular oxidation in water disinfection applications.Xiaoge WuLei YanGuofeng XuXiaozhi WangJuanJuan WangDionysios D. DionysiouElsevierarticleUltrasoundPersulfateBacteria inactivationEscherichia coliStaphylococcus aureusChemical engineeringTP155-156ENChemical Engineering Journal Advances, Vol 8, Iss , Pp 100170- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ultrasound Persulfate Bacteria inactivation Escherichia coli Staphylococcus aureus Chemical engineering TP155-156
spellingShingle	Ultrasound Persulfate Bacteria inactivation Escherichia coli Staphylococcus aureus Chemical engineering TP155-156 Xiaoge Wu Lei Yan Guofeng Xu Xiaozhi Wang JuanJuan Wang Dionysios D. Dionysiou High frequency ultrasonication enhances iron-catalyzed sulphate inactivation of Escherichia coli and Staphylococcus aureus
description	The ability of high frequency ultrasonication to improve sulphate radical-based water disinfection was investigated in the laboratory. Low doses of potassium persulfate and zero-valent iron inactivated Escherichia coli (5.74 log) and Staphylococcus aureus (4.82 log) within 40 min when supported by 600 kHz ultrasound applied at 3.09 W/mL. That was far better than the removal with potassium persulfate and iron alone, since neither PS nor Fe0 showed any killing effect on bacterial cells. Ultrasound at 3.09 W/mL was twice as effective as ultrasound at 6.81 W/mL with both bacteria. Nonlinear double Weibull and modified Hom models fitted the data well, showing an initial lag in the rate. SO4•ˉ made a greater contribution to the inactivation than •OH, but both induced cell lesioning, leakage and intracellular oxidation. The delivery effect mediated by 600 kHz ultrasound may promote the intracellular oxidation toward bacteria inactivation. Avoiding consumption by other competing impurities in water, further development should focus on the improvement of the utilization of SO4•ˉ generated for more efficient delivery for intracellular oxidation in water disinfection applications.
format	article
author	Xiaoge Wu Lei Yan Guofeng Xu Xiaozhi Wang JuanJuan Wang Dionysios D. Dionysiou
author_facet	Xiaoge Wu Lei Yan Guofeng Xu Xiaozhi Wang JuanJuan Wang Dionysios D. Dionysiou
author_sort	Xiaoge Wu
title	High frequency ultrasonication enhances iron-catalyzed sulphate inactivation of Escherichia coli and Staphylococcus aureus
title_short	High frequency ultrasonication enhances iron-catalyzed sulphate inactivation of Escherichia coli and Staphylococcus aureus
title_full	High frequency ultrasonication enhances iron-catalyzed sulphate inactivation of Escherichia coli and Staphylococcus aureus
title_fullStr	High frequency ultrasonication enhances iron-catalyzed sulphate inactivation of Escherichia coli and Staphylococcus aureus
title_full_unstemmed	High frequency ultrasonication enhances iron-catalyzed sulphate inactivation of Escherichia coli and Staphylococcus aureus
title_sort	high frequency ultrasonication enhances iron-catalyzed sulphate inactivation of escherichia coli and staphylococcus aureus
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/45d10a8f4626429eb6039af471aca4a1
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High frequency ultrasonication enhances iron-catalyzed sulphate inactivation of Escherichia coli and Staphylococcus aureus

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