Fabrication of antibacterial water filter by coating silver nanoparticles on flexible polyurethane foams

Phong, Nguyen Thi Phuong; Thanh, Ngo Vo Ke; Phương, Phan Huệ

doi:10.1088/1742-6596/187/1/012079

Cited by 44 publications

(31 citation statements)

References 5 publications

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“…The silver cation resin nanoparticle filter system achieved a 100% removal of all the targeted pathogenic bacteria during the entire 120 min of the filter operation. This performance of the Ag/cation resin nanoparticle filter system, namely removing 100% E. coli , was also reported by other researchers who used silver nanoparticle filters [55,56]. The results achieved in the first 10 min of the filter operation with a Ag/fibreglass nanoparticle filter system in removing E. coli confirmed those reported by [23] when these authors used a similar filter system for the purification of drinking water.…”

Section: Discussionsupporting

confidence: 87%

Cost-Effective Filter Materials Coated with Silver Nanoparticles for the Removal of Pathogenic Bacteria in Groundwater

Mpenyana-Monyatsi

Mthombeni

Onyango

et al. 2012

IJERPH

143

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The contamination of groundwater sources by pathogenic bacteria poses a public health concern to communities who depend totally on this water supply. In the present study, potentially low-cost filter materials coated with silver nanoparticles were developed for the disinfection of groundwater. Silver nanoparticles were deposited on zeolite, sand, fibreglass, anion and cation resin substrates in various concentrations (0.01 mM, 0.03 mM, 0.05 mM and 0.1 mM) of AgNO3. These substrates were characterised by SEM, EDS, TEM, particle size distribution and XRD analyses. In the first phase, the five substrates coated with various concentrations of AgNO3 were tested against E. coli spiked in synthetic water to determine the best loading concentration that could remove pathogenic bacteria completely from test water. The results revealed that all filters were able to decrease the concentration of E. coli from synthetic water, with a higher removal efficiency achieved at 0.1 mM (21–100%) and a lower efficiency at 0.01 mM (7–50%) concentrations. The cation resin-silver nanoparticle filter was found to remove this pathogenic bacterium at the highest rate, namely 100%. In the second phase, only the best performing concentration of 0.1 mM was considered and tested against presumptive E. coli, S. typhimurium, S. dysenteriae and V. cholerae from groundwater. The results revealed the highest bacteria removal efficiency by the Ag/cation resin filter with complete (100%) removal of all targeted bacteria and the lowest by the Ag/zeolite filter with an 8% to 67% removal rate. This study therefore suggests that the filter system with Ag/cation resin substrate can be used as a potential alternative cost-effective filter for the disinfection of groundwater and production of safe drinking water.

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Section: Discussionsupporting

confidence: 87%

Cost-Effective Filter Materials Coated with Silver Nanoparticles for the Removal of Pathogenic Bacteria in Groundwater

Mpenyana-Monyatsi

Mthombeni

Onyango

et al. 2012

IJERPH

143

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“…Copper coated PU foams were prepared by modifying the procedure [13]. Sheets of polyurethane foam were soaked in carbon tetrachloride solution and then evaporated.…”

Section: Preparation Of Copper Nanoparticlepolyurethane Foam (Cu -Pu)mentioning

confidence: 99%

Antibacterial Activity of Copper Nanoparticles and Copper Nanocomposites against Escherichia Coli Bacteria

Harikumar¹,

Aravind²

2016

ijSciences

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Nanotechnology is an emerging technology which has wide applications in many fields. The major objective of the study is to synthesise copper nanoparticles and its composites and to determine their antibacterial activity. A filter based on the developed material was fabricated. Copper nanoparticles were synthesised by chemical reduction method and were encapsulated in a biopolymer, alginate and fabricated anti bacterial water filter using copper nanoparticle-coated polyurethane foams. The synthesised copper nanoparticle, copper nanoparticle encapsulated in alginate beads and copper nanoparticle coated PU foam were characterized by several techniques including SEM and EDS analysis. Finally antimicrobial efficiency was determined against E.coli. Well diffusion method was used for testing the antibacterial effect of synthesised nanoparticls. The time and dose dependant study of copper alginate beads showed that the effectiveness of particle increase with increasing particle dose and contact time. The results obtained from the effect of bacterial load indicated that there was a decrease in antibacterial activity as the bacterial concentration increased. Flow test was conducted for the antibacterial filter by passing contaminated water through the filter and no bacteria were detected. The antimicrobial activity of metal nanoparticles is due to the large surface area which ensures a broad range of reactions with bio-organics present on the cell surface. Our research suggests that copper-coated polyurethane foams can be used as excellent antibacterial water filter.

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“…In their case, number of microbial colonies decreased with increase in concentration of AgNPs (65 in 1:2, 13 in 1:1 and 6 in 2:1 of AgNP:AC), respectively. Phong et al [20] reported 100% antibacterial efficiency of Ag nanoparticle filter for gram negative bacteria, such as E. coli and about 99.79% antibacterial efficiency in gram positive bacteria. In the present study, we have reported antimicrobial efficiency of 96.6% and 100% antibacterial efficiency against gram negative bacteria (E. coli).…”

Section: Antibacterial Efficiency Of Agnp: Ac Filter Bedmentioning

confidence: 99%

Statistically Optimized Synthesis of Silver Nanocubes from Peel Extracts of Citrus limetta and Potential Application in Waste Water Treatment

Trivedi¹

2014

J Microb Biochem Technol

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This work reports statistically optimized synthesis of silver nanocubes from cost effective, readily available bioreductant, in the form of peels of Citrus limetta. Effect of six variables viz. temperature, pH, volume of reductant, reaction volume, illumination, concentration of silver nitrate was examined using Placket Burman Design. Temperature, pH and illumination were found to significantly affect the shape and size of silver nanoparticles. Best conditions for the synthesis of silver nanocubes were 0.001 M AgNO 3 with temperature 27°C and pH 6 under dark incubation. Characterization of the synthesized nanocubes was done using UV-Vis spectroscopy, Scanning Electron Microscopy (SEM). SEM analysis showed clear synthesis of nanocubes in the range of 37-59 nm to 163-205 nm. Additionally, an investigation of biologically synthesized nanocubes in wastewater treatment was done. A filter was designed. The colloidal solution of silver nanoparticles was mixed with activated charcoal in ratio of 1:1, 1:2 and 2:1 respectively, to make filter bed. A series of microbiological tests carried out on the filtrates obtained, showed that the microbes were killed to an extent of 97%, especially E. coli. Our work indicates that silver nanoparticle loaded activated charcoal filter can be used as an excellent antibacterial water filter.

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Fabrication of antibacterial water filter by coating silver nanoparticles on flexible polyurethane foams

Cited by 44 publications

References 5 publications

Cost-Effective Filter Materials Coated with Silver Nanoparticles for the Removal of Pathogenic Bacteria in Groundwater

Cost-Effective Filter Materials Coated with Silver Nanoparticles for the Removal of Pathogenic Bacteria in Groundwater

Antibacterial Activity of Copper Nanoparticles and Copper Nanocomposites against Escherichia Coli Bacteria

Statistically Optimized Synthesis of Silver Nanocubes from Peel Extracts of Citrus limetta and Potential Application in Waste Water Treatment

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