Reverse osmosis characteristics of composite membranes prepared by plasma polymerization of allylamine. Effects of deposition conditions

1977 ◽  
Vol 21 (10) ◽  
pp. 2661-2673 ◽  
Author(s):  
D. Peric ◽  
A. T. Bell ◽  
M. Shen
Keyword(s):  
Reverse Osmosis ◽  
Plasma Polymerization ◽  
Composite Membranes ◽  
Deposition Conditions

scholarly journals In Situ Modification of Reverse Osmosis Membrane Elements for Enhanced Removal of Multiple Micropollutants

Membranes ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 28 ◽  
Author(s):  
Katie Baransi-Karkaby ◽  
Maria Bass ◽  
Viatcheslav Freger
Keyword(s):  
Boric Acid ◽  
Reverse Osmosis ◽  
Composite Membranes ◽  
Low Pressure ◽  
Pharmaceutically Active Compounds ◽  
Surface Polymerization ◽  
In Situ Modification ◽  
Endocrine Disrupting ◽  
Enhanced Surface

Reverse osmosis (RO) membranes are widely used for desalination and water treatment. However, they insufficiently reject some small uncharged micropollutants, such as certain endocrine-disrupting, pharmaceutically active compounds and boric acid, increasingly present in water sources and wastewater. This study examines the feasibility of improving rejection of multiple micropollutants in commercial low-pressure RO membrane elements using concentration polarization- and surfactant-enhanced surface polymerization. Low-pressure membrane elements modified by grafting poly(glycidyl methacrylate) showed enhanced rejection of all tested solutes (model organic micropollutants, boric acid, and NaCl), with permeability somewhat reduced, but comparable with commercial brackish water RO membranes. The study demonstrates the potential and up-scalability of grafting as an in situ method for improving removal of various classes of organic and inorganic micropollutants and tuning performance in RO and other dense composite membranes for water purification.

Preparation and testing of polyvinyl alcohol composite membranes for reverse osmosis

1995 ◽  
Vol 73 (5) ◽  
pp. 686-692 ◽  
Author(s):  
K. Lang ◽  
T. Matsuura ◽  
G. Chowdhury ◽  
S. Sourirajan
Keyword(s):  
Polyvinyl Alcohol ◽  
Reverse Osmosis ◽  
Composite Membranes
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