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
2015 ◽  
Vol 477 ◽  
pp. 86-92 ◽  
Author(s):  
Lan Hee Kim ◽  
Myung Seop Shin ◽  
Sung-Jo Kim ◽  
Chang-Min Kim ◽  
Kyu-Jung Chae ◽  
...  

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1116 ◽  
Author(s):  
Hojung Rho ◽  
Kangmin Chon ◽  
Jaeweon Cho

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.


Polymer Korea ◽  
2012 ◽  
Vol 36 (6) ◽  
pp. 810-815 ◽  
Author(s):  
Chan Jong Park ◽  
Sung Pyo Kim ◽  
Seong Ihl Cheong ◽  
Ji Won Rhim

2017 ◽  
Vol 19 (7) ◽  
pp. 5647-5657 ◽  
Author(s):  
Jessica R. Ray ◽  
Whitney Wong ◽  
Young-Shin Jun

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


Author(s):  
H. K. Plummer ◽  
E. Eichen ◽  
C. D. Melvin

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.


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