Strategies for Tailoring the Pore-Size Distribution of Virus Retention Filter Papers

Gustafsson, Simon; Mihranyan, Albert

doi:10.1021/acsami.6b03093

Cited by 46 publications

(36 citation statements)

References 37 publications

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“…The resulting pore‐size distributions from nitrogen sorption measurements of the nanocellulose filter papers of thicknesses 9 and 29 µm are presented in Figure . A shift in the pore‐size distribution toward pores of a greater width was observed for the thinner filter papers, consistent with previous observations …”

Section: Resultsmentioning

confidence: 99%

“…This nonwoven filter paper, made from 100% cellulose nanofibers, features a stratified internal architecture, consisting of numerous cellulose nanofiber sheets—hence, its name is “mille‐feuille” (or thousand leaves) filter paper. The separation efficiency of the mille‐feuille filter was verified for surrogate nanoparticles, e.g., gold nanoparticles or fluorophore‐labeled latex nanobeads, and real viruses, e.g., influenza virus, i.e., swine influenza A virus (100 nm); retrovirus, i.e., murine leukemia virus (100 nm); and parvovirus, i.e., minute virus of mice (20 nm) . In this article, the properties of the mille‐feuille filter paper are evaluated for water treatment applications for the first time.…”

Section: Introductionmentioning

confidence: 99%

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High‐Performance Virus Removal Filter Paper for Drinking Water Purification

2018

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Access to drinking water is one of the greatest global challenges today. In this study, the virus removal properties of mille‐feuille nanocellulose‐based filter papers of varying thicknesses from simulated waste water (SWW) matrix are evaluated for drinking water purification applications. Filtrations of standard SWW dispersions at various total suspended solid (TSS) content are performed, including spiking tests with 30 nm surrogate latex particles and 28 nm ΦX174 bacteriophages. Filter papers of thicknesses 9 and 29 µm are used, and the filtrations are performed at two different operational pressures, i.e., 1 and 3 bar. The presented data using SWW matrix show, for the first time, that a filter paper made from 100% nanocellulose has the capacity to efficiently remove even the smallest viruses, i.e., up to 99.9980–99.9995% efficiency, at industrially relevant flow rates, i.e., 60–500 L m −2 h −1 , and low fouling, i.e., V max > 10 3 –10 4 L m −2 . The filter paper presented in this work shows great promise for the development of robust, affordable, and sustainable water purification systems.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High‐Performance Virus Removal Filter Paper for Drinking Water Purification

2018

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“…Technically, the film term is appropriate only for a very thin, dense, less porous substrate, while the membrane term is appropriate for a porous thin substrate with high permeability. Generally, nanopaper is produced using papermaking techniques that involve passing the nanocellulose suspension through a microfiltration apparatus under vacuum, occasionally followed by hot pressing 34,44,123–125. As a result, nanopaper is mechanically robust and possesses low porosity and small pore size.…”

Section: Nanocellulose‐enabled Membranes For Water Purificationmentioning

confidence: 99%

“…The usefulness of nanotechnology for water remediation has been known for over a decade 104,126. However, only in the past few years have researchers realized the potential of using nanocellulose for varying water purification applications,4,48,127 including membrane filtration 8,9,123,125,128–132. Recently, a few developments have been made to design nanocellulose membranes to adsorb heavy metal ion impurities 40,133.…”

Section: Nanocellulose‐enabled Membranes For Water Purificationmentioning

confidence: 99%

Nanocellulose‐Enabled Membranes for Water Purification: Perspectives

Sharma

Lindström

et al. 2020

Advanced Sustainable Systems

142

106

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Membrane technology remains the most energy‐efficient process for removing contaminants (micrometer‐size particles to angstrom‐size hydrated ions) from water. However, the current membrane technology, involving relatively expensive synthetic materials, is often nonsustainable for the poorest communities in the society. In this article, perspectives are provided on the emerging nanocellulose‐enabled membrane technology based on nanoscale cellulose fibers that can be extracted from almost any biomass. It is conceivable that nanocellulose membranes developed from inexpensive, abundant, and sustainable resources (such as agriculture residues and underutilized biomass waste) can lower the cost of membrane separation, as these membranes offer the ability to remove a range of pollutants in one step, via size exclusion and/or adsorption. The nanocellulose‐enabled membrane technology not only may be suitable for tackling global drinking water challenges, but it can also provide a new low‐cost platform for various pressure‐driven filtration techniques, such as microfiltration, ultrafiltration, nanofiltration, and reverse osmosis. Some relevant parameters that can control the filtration performance of nanocellulose‐enabled membranes are comprehensively discussed. A short review of the current state of development for nanocellulose membranes is also provided.

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“…The size of viruses varies from 20 nm to 300 nm [13]. In particular, the smallest viruses so far are found to be around 18-22 nm in diameter [14], only slightly smaller than the human antibodies with an average size of 12 nm [15,16]. While the commonly used detection methods for virus detection are conventional immunoassays and polymerase chain reaction (PCR), the former assay is limited with quantification problems and the latter requires well-established tools with high instrumentation costs and experienced labor.…”

Section: Introductionmentioning

confidence: 99%

Surface chemistry and morphology in single particle optical imaging

et al. 2017

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Biological nanoparticles such as viruses and exosomes are important biomarkers for a range of medical conditions, from infectious diseases to cancer. Biological sensors that detect whole viruses and exosomes with high specificity, yet without additional labeling, are promising because they reduce the complexity of sample preparation and may improve measurement quality by retaining information about nanoscale physical structure of the bio-nanoparticle (BNP). Towards this end, a variety of BNP biosensor technologies have been developed, several of which are capable of enumerating the precise number of detected viruses or exosomes and analyzing physical properties of each individual particle. Optical imaging techniques are promising candidates among broad range of label-free nanoparticle detectors. These imaging BNP sensors detect the binding of single nanoparticles on a flat surface functionalized with a specific capture molecule or an array of multiplexed capture probes. The functionalization step confers all molecular specificity for the sensor's target but can introduce an unforeseen problem; a rough and inhomogeneous surface coating can be a source of noise, as these sensors detect small local changes in optical refractive index. In this paper, we review several optical technologies for label-free BNP detectors with a focus on imaging systems. We compare the surface-imaging methods including dark-field, surface plasmon resonance imaging and interference reflectance imaging. We discuss the importance of ensuring consistently uniform and smooth surface coatings of capture molecules for these types of biosensors and finally summarize several methods that have been developed towards addressing this challenge.

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Strategies for Tailoring the Pore-Size Distribution of Virus Retention Filter Papers

Cited by 46 publications

References 37 publications

High‐Performance Virus Removal Filter Paper for Drinking Water Purification

High‐Performance Virus Removal Filter Paper for Drinking Water Purification

Nanocellulose‐Enabled Membranes for Water Purification: Perspectives

Surface chemistry and morphology in single particle optical imaging

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