Disinfection properties of the tea polyphenol epigallocatechin gallate in the presence of calcium ions

The antibacterial properties of tea polyphenols make them suitable for drinking water disinfection, but it is necessary to clarify the influence of metal ions on the sterilization efficacy. Epigallocatechin gallate (EGCG) was selected as a representative tea polyphenol, and the effects of calcium io...

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Autores principales:	Zhen Xu, Xuanqi Liu, Cuimin Feng, Shu Zhu, Ying Li, Ziyu Guo, Xinyi Chen
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	bacteriostasis calcium ions concentration disinfection egcg tea polyphenols Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/320c11717c24485c85d2181a7b88a160
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id	oai:doaj.org-article:320c11717c24485c85d2181a7b88a160
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spelling	oai:doaj.org-article:320c11717c24485c85d2181a7b88a1602021-11-05T17:13:48ZDisinfection properties of the tea polyphenol epigallocatechin gallate in the presence of calcium ions2709-80282709-803610.2166/aqua.2021.016https://doaj.org/article/320c11717c24485c85d2181a7b88a1602021-08-01T00:00:00Zhttp://aqua.iwaponline.com/content/70/5/731https://doaj.org/toc/2709-8028https://doaj.org/toc/2709-8036The antibacterial properties of tea polyphenols make them suitable for drinking water disinfection, but it is necessary to clarify the influence of metal ions on the sterilization efficacy. Epigallocatechin gallate (EGCG) was selected as a representative tea polyphenol, and the effects of calcium ion (Ca2+) concentration on its disinfection properties in Escherichia coli cultures were investigated. Changes in bacterial growth and structures were detected. The presence of low concentration Ca2+ (1–5 mM) inhibited the disinfection effect of EGCG but higher concentrations (6–10 mM) enhanced its effects. As Ca2+ concentration increased, the proportion of damaged bacteria also increased (15–43%). The presence of Ca2+ lessened the damaging effects of EGCG on the surface structures of E. coli but may have facilitated the entry of EGCG into the bacteria, enhancing its antibacterial efficacy. Tea polyphenols may be useful additives for the disinfection of groundwater and other raw waters containing calcium ions. HIGHLIGHTS Low concentration calcium ions inhibit the disinfection effect of EGCG, but high concentrations enhance disinfection.; Rate of EGCG-induced E. coli damage rises, as calcium ion concentration increases.; Calcium ions inhibit EGCG-induced damage to cell walls and membranes but promote internal structural damage.; Tea polyphenols may be useful for processing raw water with high calcium ion concentrations.;Zhen XuXuanqi LiuCuimin FengShu ZhuYing LiZiyu GuoXinyi ChenIWA Publishingarticlebacteriostasiscalcium ionsconcentrationdisinfectionegcgtea polyphenolsEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENAqua, Vol 70, Iss 5, Pp 731-740 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bacteriostasis calcium ions concentration disinfection egcg tea polyphenols Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	bacteriostasis calcium ions concentration disinfection egcg tea polyphenols Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Zhen Xu Xuanqi Liu Cuimin Feng Shu Zhu Ying Li Ziyu Guo Xinyi Chen Disinfection properties of the tea polyphenol epigallocatechin gallate in the presence of calcium ions
description	The antibacterial properties of tea polyphenols make them suitable for drinking water disinfection, but it is necessary to clarify the influence of metal ions on the sterilization efficacy. Epigallocatechin gallate (EGCG) was selected as a representative tea polyphenol, and the effects of calcium ion (Ca2+) concentration on its disinfection properties in Escherichia coli cultures were investigated. Changes in bacterial growth and structures were detected. The presence of low concentration Ca2+ (1–5 mM) inhibited the disinfection effect of EGCG but higher concentrations (6–10 mM) enhanced its effects. As Ca2+ concentration increased, the proportion of damaged bacteria also increased (15–43%). The presence of Ca2+ lessened the damaging effects of EGCG on the surface structures of E. coli but may have facilitated the entry of EGCG into the bacteria, enhancing its antibacterial efficacy. Tea polyphenols may be useful additives for the disinfection of groundwater and other raw waters containing calcium ions. HIGHLIGHTS Low concentration calcium ions inhibit the disinfection effect of EGCG, but high concentrations enhance disinfection.; Rate of EGCG-induced E. coli damage rises, as calcium ion concentration increases.; Calcium ions inhibit EGCG-induced damage to cell walls and membranes but promote internal structural damage.; Tea polyphenols may be useful for processing raw water with high calcium ion concentrations.;
format	article
author	Zhen Xu Xuanqi Liu Cuimin Feng Shu Zhu Ying Li Ziyu Guo Xinyi Chen
author_facet	Zhen Xu Xuanqi Liu Cuimin Feng Shu Zhu Ying Li Ziyu Guo Xinyi Chen
author_sort	Zhen Xu
title	Disinfection properties of the tea polyphenol epigallocatechin gallate in the presence of calcium ions
title_short	Disinfection properties of the tea polyphenol epigallocatechin gallate in the presence of calcium ions
title_full	Disinfection properties of the tea polyphenol epigallocatechin gallate in the presence of calcium ions
title_fullStr	Disinfection properties of the tea polyphenol epigallocatechin gallate in the presence of calcium ions
title_full_unstemmed	Disinfection properties of the tea polyphenol epigallocatechin gallate in the presence of calcium ions
title_sort	disinfection properties of the tea polyphenol epigallocatechin gallate in the presence of calcium ions
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/320c11717c24485c85d2181a7b88a160
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Disinfection properties of the tea polyphenol epigallocatechin gallate in the presence of calcium ions

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