Effect of hydrophilic polymer modification of reverse osmosis membrane surfaces on organic adsorption and biofouling behavior

2021 ◽  
Vol 609 ◽  
pp. 125680
Author(s):  
Daisuke Saeki ◽  
Genki Yonamine ◽  
Hideto Matsuyama
Keyword(s):  
Reverse Osmosis ◽  
Hydrophilic Polymer ◽  
Reverse Osmosis Membrane ◽  
Polymer Modification ◽  
Membrane Surfaces

UV mediated attachment of short Arginine-Tryptophan antimicrobial peptides on reverse osmosis membrane surfaces inhibit Pseudomonas aeruginosa biofilm

Desalination ◽  
2018 ◽  
Vol 431 ◽  
pp. 73-79 ◽  
Author(s):  
Canwei Mao ◽  
Gunasekaran Mohanraj ◽  
Nitzan Shtreimer Kandiyote ◽  
Roni Kasher ◽  
Christopher J. Arnusch
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Antimicrobial Peptides ◽  
Reverse Osmosis ◽  
Reverse Osmosis Membrane ◽  
Membrane Surfaces

scholarly journals An Autopsy Study of a Fouled Reverse Osmosis Membrane Used for Ultrapure Water Production

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1116 ◽  
Author(s):  
Hojung Rho ◽  
Kangmin Chon ◽  
Jaeweon Cho
Keyword(s):  
Reverse Osmosis ◽  
Reverse Osmosis Membrane ◽  
Ultrapure Water ◽  
Ultraviolet A ◽  
Cleaning Efficiency ◽  
Autopsy Study ◽  
Membrane Surfaces ◽  
Ro Membrane ◽  
Ultra Trace

This study investigated the fouling and cleaning behaviors of reverse osmosis (RO) membranes in a lab–scale ultrapure water (UPW) production system via membrane autopsies and characterization of dissolved organic matter (DOM) and membrane foulants. Most of DOM were effectively removed by the MFC filter, with the exception of the peak at 150 Da. The RO membranes were effective in reducing conductivity, DOM, total nitrogen (TN), and ultraviolet A (UVA254nm) concentration; the polishing stage using IER filter resulted in ultra-trace levels of all these parameters required for semiconductor manufacturing (> 18.2 ΩM). The quantity of the desorbed RO membrane foulants, in terms of dissolved organic carbon (DOC), varied considerably depending on the type of desorbing agents: 0.1 N NaCl (65.12 mgC m−2) > 0.1 N NaOH (46.14 mgC m−2) > deionized water (25.39 mgC m−2) > 0.1 N HCl (15.95 mgC m−2). The high cleaning efficiency of the salt solution (0.1 N NaCl) was attributed to the efficient desorption of hydrophilic DOM foulants from the RO membrane surfaces. These results demonstrate that the salt cleaning may provide a promising option to recover the performance of the RO membranes fouled primarily by hydrophilic DOM fractions.

scholarly journals Studies on the Fouling Reduction by Coating of Cationic Exchange Polymer onto Reverse Osmosis Membrane Surfaces

Polymer Korea ◽  
2012 ◽  
Vol 36 (6) ◽  
pp. 810-815 ◽  
Author(s):  
Chan Jong Park ◽  
Sung Pyo Kim ◽  
Seong Ihl Cheong ◽  
Ji Won Rhim
Keyword(s):  
Reverse Osmosis ◽  
Reverse Osmosis Membrane ◽  
Membrane Surfaces ◽  
Cationic Exchange ◽  
Fouling Reduction

Antiscaling efficacy of CaCO3and CaSO4on polyethylene glycol (PEG)-modified reverse osmosis membranes in the presence of humic acid: interplay of membrane surface properties and water chemistry

2017 ◽  
Vol 19 (7) ◽  
pp. 5647-5657 ◽  
Author(s):  
Jessica R. Ray ◽  
Whitney Wong ◽  
Young-Shin Jun
Keyword(s):  
Polyethylene Glycol ◽  
Humic Acid ◽  
Water Chemistry ◽  
Reverse Osmosis ◽  
Surface Properties ◽  
Membrane Surface ◽  
Reverse Osmosis Membrane ◽  
Membrane Surfaces ◽  
Colloidal Formation ◽  
Reverse Osmosis Membranes

A specific polyethylene glycol (PEG)–humic acid–SO42−interaction results in promoted CaSO4colloidal formation on PEG reverse osmosis membrane surfaces.

Cellulose Acetate Reverse Osmosis Membrane Structure

1972 ◽  
Vol 30 ◽  
pp. 528-529
Author(s):  
H. K. Plummer ◽  
E. Eichen ◽  
C. D. Melvin
Keyword(s):  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Membrane Structure ◽  
Freeze Drying ◽  
Dense Layer ◽  
Water Removal ◽  
Reverse Osmosis Membrane ◽  
Correct Interpretation ◽  
Electron Image ◽  
Scanning Electron

Much of the work reported in the literature on cellulose acetate reverse osmosis membranes has raised new and important questions with regard to the dense or “active” layer of these membranes. Several thickness values and structures have been attributed to the dense layer. To ensure the correct interpretation of the cellulose acetate structure thirteen different preparative techniques have been used in this investigation. These thirteen methods included various combinations of water substitution, freeze drying, freeze sectioning, fracturing, embedding, and microtomy techniques with both transmission and scanning electron microscope observations.It was observed that several factors can cause a distortion of the structure during sample preparation. The most obvious problem of water removal can cause swelling, shrinking, and folds. Improper removal of embedding materials, when used, can cause a loss of electron image contrast and, or structure which could hinder interpretation.

Novel Magnetic Resonance Measurements of Fouling in Operating Spiral Wound Reverse Osmosis Membrane Modules

2021 ◽  
Vol 196 ◽  
pp. 117006 ◽  
Author(s):  
Nicholas W. Bristow ◽  
Sarah J. Vogt ◽  
Szilard S. Bucs ◽  
Johannes S. Vrouwenvelder ◽  
Michael L. Johns ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Reverse Osmosis ◽  
Reverse Osmosis Membrane ◽  
Membrane Modules ◽  
Spiral Wound

scholarly journals Antifouling and Flux Enhancement of Reverse Osmosis Membrane by Grafting Poly (3-Sulfopropyl Methacrylate) Brushes

Membranes ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 213
Author(s):  
Reema Mushtaq ◽  
Muhammad Asad Abbas ◽  
Shehla Mushtaq ◽  
Nasir M. Ahmad ◽  
Niaz Ali Khan ◽  
...  
Keyword(s):  
Contact Angle ◽  
Reverse Osmosis ◽  
Polymer Brushes ◽  
Surface Composition ◽  
Reverse Osmosis Membrane ◽  
Optical Profilometry ◽  
Thin Film Composite ◽  
Membrane Sample ◽  
Contact Angle Analysis ◽  
And Staphylococcus Aureus

A commercial thin film composite (TFC) polyamide (PA) reverse osmosis membrane was grafted with 3-sulfopropyl methacrylate potassium (SPMK) to produce PA-g-SPMK by atom transfer radical polymerization (ATRP). The grafting of PA was done at varied concentrations of SPMK, and its effect on the surface composition and morphology was studied by Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), optical profilometry, and contact angle analysis. The grafting of hydrophilic ionically charged PSPMK polymer brushes having acrylate and sulfonate groups resulted in enhanced hydrophilicity rendering a reduction of contact angle from 58° of pristine membrane sample labeled as MH0 to 10° for a modified membrane sample labeled as MH3. Due to the increased hydrophilicity, the flux rate rises from 57.1 L m−2 h−1 to 71.2 L m−2 h−1, and 99% resistance against microbial adhesion (Escherichia coli and Staphylococcus aureus) was obtained for MH3 after modification

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