In situ formation of silver nanoparticles on thin-film composite reverse osmosis membranes for biofouling mitigation

Moshe Ben-Sasson, Xinglin Lu, Edo Bar-Zeev, Katherine R. Zodrow, Siamak Nejati, Genggeng Qi, Emmanuel P. Giannelis, Menachem Elimelech

Research output: Contribution to journalArticle

142 Citations (Scopus)

Abstract

The potential to incorporate silver nanoparticles (Ag-NPs) as biocides in membranes for water purification has gained much interest in recent years. However, a viable strategy for loading the Ag-NPs on the membrane remains challenging. This paper presents a novel, facile procedure for loading Ag-NPs on thin-film composite (TFC) reverse osmosis membranes. Reaction of silver salt with a reducing agent on the membrane surface resulted in uniform coverage of Ag-NPs, irreversibly bound to the membrane, as confirmed by XPS, TEM, and SEM analyses. Salt selectivity of the membrane as well its surface roughness, hydrophilicity, and zeta potential were not impacted by Ag-NP functionalization, while a slight reduction (up to 17%) in water permeability was observed. The formed Ag-NPs imparted strong antibacterial activity to the membrane, leading to reduction of more than 75% in the number of live bacteria attached to the membrane for three model bacteria strains. In addition, confocal microscopy analyses revealed that Ag-NPs significantly suppressed biofilm formation, with 41% reduction in total biovolume and significant reduction in EPS, dead, and live bacteria on the functionalized membrane. The simplicity of the method, the short reaction time, the ability to load the Ag-NPs on site, and the strong imparted antibacterial activity highlight the potential of this method in real-world RO membrane applications.

Original languageEnglish (US)
Pages (from-to)260-270
Number of pages11
JournalWater Research
Volume62
DOIs
StatePublished - Oct 1 2014

Fingerprint

Biofouling
Osmosis
Osmosis membranes
biofouling
Reverse osmosis
Silver
Nanoparticles
silver
mitigation
membrane
Membranes
Thin films
Composite materials
Bacteria
bacterium
Salts
nanoparticle
reverse osmosis
in situ
Biocides

Keywords

  • Biofouling
  • Biofouling control
  • Silver nanoparticles
  • Thin-film composite membranes

ASJC Scopus subject areas

  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Cite this

In situ formation of silver nanoparticles on thin-film composite reverse osmosis membranes for biofouling mitigation. / Ben-Sasson, Moshe; Lu, Xinglin; Bar-Zeev, Edo; Zodrow, Katherine R.; Nejati, Siamak; Qi, Genggeng; Giannelis, Emmanuel P.; Elimelech, Menachem.

In: Water Research, Vol. 62, 01.10.2014, p. 260-270.

Research output: Contribution to journalArticle

Ben-Sasson, Moshe ; Lu, Xinglin ; Bar-Zeev, Edo ; Zodrow, Katherine R. ; Nejati, Siamak ; Qi, Genggeng ; Giannelis, Emmanuel P. ; Elimelech, Menachem. / In situ formation of silver nanoparticles on thin-film composite reverse osmosis membranes for biofouling mitigation. In: Water Research. 2014 ; Vol. 62. pp. 260-270.
@article{ed77f23edf454b6eb4c0f9b0b827c27d,
title = "In situ formation of silver nanoparticles on thin-film composite reverse osmosis membranes for biofouling mitigation",
abstract = "The potential to incorporate silver nanoparticles (Ag-NPs) as biocides in membranes for water purification has gained much interest in recent years. However, a viable strategy for loading the Ag-NPs on the membrane remains challenging. This paper presents a novel, facile procedure for loading Ag-NPs on thin-film composite (TFC) reverse osmosis membranes. Reaction of silver salt with a reducing agent on the membrane surface resulted in uniform coverage of Ag-NPs, irreversibly bound to the membrane, as confirmed by XPS, TEM, and SEM analyses. Salt selectivity of the membrane as well its surface roughness, hydrophilicity, and zeta potential were not impacted by Ag-NP functionalization, while a slight reduction (up to 17{\%}) in water permeability was observed. The formed Ag-NPs imparted strong antibacterial activity to the membrane, leading to reduction of more than 75{\%} in the number of live bacteria attached to the membrane for three model bacteria strains. In addition, confocal microscopy analyses revealed that Ag-NPs significantly suppressed biofilm formation, with 41{\%} reduction in total biovolume and significant reduction in EPS, dead, and live bacteria on the functionalized membrane. The simplicity of the method, the short reaction time, the ability to load the Ag-NPs on site, and the strong imparted antibacterial activity highlight the potential of this method in real-world RO membrane applications.",
keywords = "Biofouling, Biofouling control, Silver nanoparticles, Thin-film composite membranes",
author = "Moshe Ben-Sasson and Xinglin Lu and Edo Bar-Zeev and Zodrow, {Katherine R.} and Siamak Nejati and Genggeng Qi and Giannelis, {Emmanuel P.} and Menachem Elimelech",
year = "2014",
month = "10",
day = "1",
doi = "10.1016/j.watres.2014.05.049",
language = "English (US)",
volume = "62",
pages = "260--270",
journal = "Water Research",
issn = "0043-1354",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - In situ formation of silver nanoparticles on thin-film composite reverse osmosis membranes for biofouling mitigation

AU - Ben-Sasson, Moshe

AU - Lu, Xinglin

AU - Bar-Zeev, Edo

AU - Zodrow, Katherine R.

AU - Nejati, Siamak

AU - Qi, Genggeng

AU - Giannelis, Emmanuel P.

AU - Elimelech, Menachem

PY - 2014/10/1

Y1 - 2014/10/1

N2 - The potential to incorporate silver nanoparticles (Ag-NPs) as biocides in membranes for water purification has gained much interest in recent years. However, a viable strategy for loading the Ag-NPs on the membrane remains challenging. This paper presents a novel, facile procedure for loading Ag-NPs on thin-film composite (TFC) reverse osmosis membranes. Reaction of silver salt with a reducing agent on the membrane surface resulted in uniform coverage of Ag-NPs, irreversibly bound to the membrane, as confirmed by XPS, TEM, and SEM analyses. Salt selectivity of the membrane as well its surface roughness, hydrophilicity, and zeta potential were not impacted by Ag-NP functionalization, while a slight reduction (up to 17%) in water permeability was observed. The formed Ag-NPs imparted strong antibacterial activity to the membrane, leading to reduction of more than 75% in the number of live bacteria attached to the membrane for three model bacteria strains. In addition, confocal microscopy analyses revealed that Ag-NPs significantly suppressed biofilm formation, with 41% reduction in total biovolume and significant reduction in EPS, dead, and live bacteria on the functionalized membrane. The simplicity of the method, the short reaction time, the ability to load the Ag-NPs on site, and the strong imparted antibacterial activity highlight the potential of this method in real-world RO membrane applications.

AB - The potential to incorporate silver nanoparticles (Ag-NPs) as biocides in membranes for water purification has gained much interest in recent years. However, a viable strategy for loading the Ag-NPs on the membrane remains challenging. This paper presents a novel, facile procedure for loading Ag-NPs on thin-film composite (TFC) reverse osmosis membranes. Reaction of silver salt with a reducing agent on the membrane surface resulted in uniform coverage of Ag-NPs, irreversibly bound to the membrane, as confirmed by XPS, TEM, and SEM analyses. Salt selectivity of the membrane as well its surface roughness, hydrophilicity, and zeta potential were not impacted by Ag-NP functionalization, while a slight reduction (up to 17%) in water permeability was observed. The formed Ag-NPs imparted strong antibacterial activity to the membrane, leading to reduction of more than 75% in the number of live bacteria attached to the membrane for three model bacteria strains. In addition, confocal microscopy analyses revealed that Ag-NPs significantly suppressed biofilm formation, with 41% reduction in total biovolume and significant reduction in EPS, dead, and live bacteria on the functionalized membrane. The simplicity of the method, the short reaction time, the ability to load the Ag-NPs on site, and the strong imparted antibacterial activity highlight the potential of this method in real-world RO membrane applications.

KW - Biofouling

KW - Biofouling control

KW - Silver nanoparticles

KW - Thin-film composite membranes

UR - http://www.scopus.com/inward/record.url?scp=84904700508&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84904700508&partnerID=8YFLogxK

U2 - 10.1016/j.watres.2014.05.049

DO - 10.1016/j.watres.2014.05.049

M3 - Article

C2 - 24963888

AN - SCOPUS:84904700508

VL - 62

SP - 260

EP - 270

JO - Water Research

JF - Water Research

SN - 0043-1354

ER -