Effects of Chloride Concentration on the Water Disinfection Performance of Silver Containing Nanocellulose-based Composites

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Effects of Chloride Concentration on the Water Disinfection Performance of Silver Containing Nanocellulose-based Composites. / Lehtonen, Janika; Hassinen, Jukka; Honkanen, Riina; Kumar, Avula Anil; Viskari, Heli; Kettunen, Anu; Pahimanolis, Nikolaos; Pradeep, Thalappil; Rojas, Orlando J.; Ikkala, Olli.

julkaisussa: Scientific Reports, Vuosikerta 9, Nro 1, 19505, 01.12.2019.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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@article{b3f5ce64c61a46b4a92739a39e4c9c83,
title = "Effects of Chloride Concentration on the Water Disinfection Performance of Silver Containing Nanocellulose-based Composites",
abstract = "The availability of microbially-safe drinking water is a challenge in many developing regions. Due to the well-known antibacterial effect of silver ions, materials used for their controlled release have been widely studied for point-of-use water disinfection. However, even if it is in principle known that chloride anions can suppress the antibacterial efficiency of silver, the majority of previous studies, surprisingly, have not focused on chloride concentrations relevant for freshwaters and thus for practical applications. Here, we prepared low-cost nanocellulose-aluminium oxyhydroxide nanocomposites functionalized with silver nanoparticles. Field samples obtained from Chennai, India were used as a guideline for choosing relevant chloride concentrations for the antibacterial studies, i.e., 10, 90, and 290 ppm. The antibacterial performance of the material against Escherichia coli and Bacillus subtilis was demonstrated and the influence of chloride concentration on the antibacterial effect was studied with E. coli. A 1 h contact time led to bacterial reductions of 5.6 log10, 2.9 log10, and 2.2 log10, respectively. This indicates that an increase of chloride concentration leads to a substantial reduction of antibacterial efficiency, even within chloride concentrations found in freshwaters. This work enables further insights for designing freshwater purification systems that utilize silver-releasing materials.",
author = "Janika Lehtonen and Jukka Hassinen and Riina Honkanen and Kumar, {Avula Anil} and Heli Viskari and Anu Kettunen and Nikolaos Pahimanolis and Thalappil Pradeep and Rojas, {Orlando J.} and Olli Ikkala",
year = "2019",
month = "12",
day = "1",
doi = "10.1038/s41598-019-56009-6",
language = "English",
volume = "9",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
number = "1",

}

RIS - Lataa

TY - JOUR

T1 - Effects of Chloride Concentration on the Water Disinfection Performance of Silver Containing Nanocellulose-based Composites

AU - Lehtonen, Janika

AU - Hassinen, Jukka

AU - Honkanen, Riina

AU - Kumar, Avula Anil

AU - Viskari, Heli

AU - Kettunen, Anu

AU - Pahimanolis, Nikolaos

AU - Pradeep, Thalappil

AU - Rojas, Orlando J.

AU - Ikkala, Olli

PY - 2019/12/1

Y1 - 2019/12/1

N2 - The availability of microbially-safe drinking water is a challenge in many developing regions. Due to the well-known antibacterial effect of silver ions, materials used for their controlled release have been widely studied for point-of-use water disinfection. However, even if it is in principle known that chloride anions can suppress the antibacterial efficiency of silver, the majority of previous studies, surprisingly, have not focused on chloride concentrations relevant for freshwaters and thus for practical applications. Here, we prepared low-cost nanocellulose-aluminium oxyhydroxide nanocomposites functionalized with silver nanoparticles. Field samples obtained from Chennai, India were used as a guideline for choosing relevant chloride concentrations for the antibacterial studies, i.e., 10, 90, and 290 ppm. The antibacterial performance of the material against Escherichia coli and Bacillus subtilis was demonstrated and the influence of chloride concentration on the antibacterial effect was studied with E. coli. A 1 h contact time led to bacterial reductions of 5.6 log10, 2.9 log10, and 2.2 log10, respectively. This indicates that an increase of chloride concentration leads to a substantial reduction of antibacterial efficiency, even within chloride concentrations found in freshwaters. This work enables further insights for designing freshwater purification systems that utilize silver-releasing materials.

AB - The availability of microbially-safe drinking water is a challenge in many developing regions. Due to the well-known antibacterial effect of silver ions, materials used for their controlled release have been widely studied for point-of-use water disinfection. However, even if it is in principle known that chloride anions can suppress the antibacterial efficiency of silver, the majority of previous studies, surprisingly, have not focused on chloride concentrations relevant for freshwaters and thus for practical applications. Here, we prepared low-cost nanocellulose-aluminium oxyhydroxide nanocomposites functionalized with silver nanoparticles. Field samples obtained from Chennai, India were used as a guideline for choosing relevant chloride concentrations for the antibacterial studies, i.e., 10, 90, and 290 ppm. The antibacterial performance of the material against Escherichia coli and Bacillus subtilis was demonstrated and the influence of chloride concentration on the antibacterial effect was studied with E. coli. A 1 h contact time led to bacterial reductions of 5.6 log10, 2.9 log10, and 2.2 log10, respectively. This indicates that an increase of chloride concentration leads to a substantial reduction of antibacterial efficiency, even within chloride concentrations found in freshwaters. This work enables further insights for designing freshwater purification systems that utilize silver-releasing materials.

UR - http://www.scopus.com/inward/record.url?scp=85076883907&partnerID=8YFLogxK

U2 - 10.1038/s41598-019-56009-6

DO - 10.1038/s41598-019-56009-6

M3 - Article

VL - 9

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

IS - 1

M1 - 19505

ER -

ID: 40205359