Electrospun Silver Coated Polyacrylonitrile Membranes for Water Filtration Applications

Parekh, Shalv Amit; David, Rebecca Nicole; Bannuru, Kranthi K. R.; Krishnaswamy, Lakshminarasimhan; Baji, Avinash

doi:10.3390/membranes8030059

Cited by 29 publications

(13 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using the resazurin assay, a significant antimicrobial activity ( A ) of AgNPs-functionalized membrane ( A was equal to 5 or even higher) was determined. Such a high antimicrobial activity is, however, not surprising, as AgNPs can target a broad spectrum of organisms (Marambio-Jones and Hoek 2010) and an antimicrobial potential of various kinds of water filtration membranes modified with AgNPs has been declared several times (Huang et al 2016; Mecha and Pillay 2014; Parekh et al 2018). On the other hand, A values for all QAS-functionalized membranes were lower than 1, which shows no significant antimicrobial activity of QAS itself.…”

Section: Discussionmentioning

confidence: 99%

Resazurin assay for assessment of antimicrobial properties of electrospun nanofiber filtration membranes

Trávníčková

Mikula

Opršal³

et al. 2019

AMB Expr

View full text Add to dashboard Cite

We developed a simple and fast microplate assay for evaluation of the antimicrobial activity of electrospun nanofiber filtration membranes or similar porous materials for water treatment technologies. Resazurin (alamarBlue®) was used as an indicator of the amount of viable experimental microorganisms Gram-negative Escherichia coli, Gram-positive Enterococcus faecalis, and natural wastewater treatment plant effluent bacteria. A bacterial inoculum of concentration 1–3 × 105 CFU mL−1 was pipetted onto the surface of assessed both functionalized and respective control membranes and incubated in 12-well plates for 4 h at 37 °C. Kinetics of resazurin metabolization, i.e. its reduction to fluorescent resorufin, was evaluated fluorimetrically (λex520/λem590 nm). A number of viable bacteria on the membranes expressed as CFU mL−1 was calculated from the kinetic curves by using calibration curves that were constructed for both experimental bacterial species. Antimicrobial activities of the membranes were evaluated by either resazurin assay or modified ISO 20743 plate count assay. Results of both assays showed the significant antimicrobial activity of membranes functionalized with silver nanoparticles for both bacterial species and wastewater treatment plant effluent bacteria as well (log CFU reduction compared to control membrane > 4), while membranes containing specific quaternary ammonium salts were inefficient (log CFU reduction < 1). The suitability of resazurin microplate assay for testing nanofiber filtration membranes and analogous matrices has proven to be a faster and less demanding alternative to the traditionally used approach providing comparable results.

show abstract

Section: Discussionmentioning

confidence: 99%

Resazurin assay for assessment of antimicrobial properties of electrospun nanofiber filtration membranes

Trávníčková

Mikula

Opršal³

et al. 2019

AMB Expr

View full text Add to dashboard Cite

show abstract

“…Then, the membrane is placed in 10 mL of 1 X PBS solution and vortexed for 2 min to transfer any remaining bacteria from the membrane to the 1 X PBS solution. Afterward, the quantity of surviving bacterial cells is evaluated by plating the extracted solution onto LB agar plates and subsequent colony counting after 12 h of incubation at 37 °C ( Pant et al, 2011 ; Parekh et al, 2018 ; Fig. 3 c).…”

Section: Antibacterial Performance Evaluation Of Electrospun Nanofibementioning

confidence: 99%

“…Based on the exponential growth of the population, it has been estimated that the human population will reach about 9 billion by 2050 ( Ray et al, 2016 ). Thus, the availability of clean drinking water sources to this enormous population will turn to one of the most critical problems mankind has to address ( Parekh et al, 2018 ). The World Health Organization has stated that safe drinking water accessibility is the concern of about 785 million people and 2 million people use a contaminated water source for drinking ( WHO, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Efficient removal of water bacteria and viruses using electrospun nanofibers

Fahimirad

Sillanpää

2021

Science of The Total Environment

135

View full text Add to dashboard Cite

Pathogenic contamination has been considered as a significant worldwide water quality concern. Due to providing promising opportunities for the production of nanocomposite membranes with tailored porosity, adjustable pore size, and scaled-up ability of biomolecules incorporation, electrospinning has become the center of attention. This review intends to provide a detailed summary of the recent advances in the fabrication of antibacterial and antiviral electrospun nanofibers and discuss their application efficiency as a water filtration membrane. The current review attempts to give a functionalist perspective of the fundamental progress in construction strategies of antibacterial and antiviral electrospun nanofibers. The review provides a list of antibacterial and antiviral agents commonly used as water membrane filters and discusses the challenges in the incorporation process. We have thoroughly studied the recent application of functionalized electrospun nanofibers in the water disinfection process, with an emphasis on their efficiency. Moreover, different antibacterial and antiviral assay techniques for membranes are discussed, the gaps and limitations are highlighted and promising strategies to overcome barriers are studies.

show abstract

“…Many diseases, such as chronic lung disease and lung cancer, are mainly caused by PM2.5 (Buivydiene et al , 2019; Mohraz et al , 2019). In addition, PM2.5 particles contain many fine-grained pollutants, such as various fungi and bacteria, spores and pollen allergen, which could lead to allergies or respiratory diseases (Chen et al , 2019; Parekh et al , 2018; Patel et al , 2019). There are two ways to protect people from PM2.5.…”

Section: Introductionmentioning

confidence: 99%

Preparation of multifunctional AgNPs/PAN nanofiber membrane for air filtration by one-step process

Yang

Wang

et al. 2020

PRT

View full text Add to dashboard Cite

Purpose The purpose of this paper is to fabricate a high-performance filtration electrospun nanofiber membrane with antibacterial function. The Ag nanoparticles (AgNPs) gotten by reducing AgNO3 act as antimicrobial agent. Then the AgNPs/Polyacrylonitrile (AgNPs/PAN) composite nanofiber membrane was prepared by electrospinning. Design/methodology/approach The electrospun Ag/PAN composite membrane was prepared by one step, in which the Ag particles were acting as antibacterial agent and PAN nanofiber as the upholder of the composite mat. AgNPs were obtained by reducing AgNO3 in N,N-Dimethylformamide (DMF) solution at high temperature. Meanwhile, the PAN particles were added to DMF solution and dissolved. Then the Ag/PAN nanofiber was obtained by electrospinning. Findings The thinner nanofiber can be produced with PAN concentration of 12 per cent and AgNPs concentration of 10 per cent. Finally, the filtration resistance of the composite membrane with antibacterial property is as high as 99.1 per cent, and the filtration efficiency is only 83 Pa. Therefore, the AgNPs/PAN composite membrane is the ideal choice for air filtration with antibacterial property. Originality/value The AgNPs/PAN composite nanofiber membrane has high filtration performance for particulate matter (PM)25 and outstanding antibacterial property to Escherichia coli and Staphylococcus aureus, which can be used with masks, air-conditioning filters (including car air-conditioning filters), window screening and other similar objects.

show abstract

Electrospun Silver Coated Polyacrylonitrile Membranes for Water Filtration Applications

Cited by 29 publications

References 31 publications

Resazurin assay for assessment of antimicrobial properties of electrospun nanofiber filtration membranes

Resazurin assay for assessment of antimicrobial properties of electrospun nanofiber filtration membranes

Efficient removal of water bacteria and viruses using electrospun nanofibers

Preparation of multifunctional AgNPs/PAN nanofiber membrane for air filtration by one-step process

Contact Info

Product

Resources

About