On the influence of salt concentration on the transport properties of reverse osmosis membranes in high pressure and high recovery desalination

2020 ◽  
Vol 594 ◽  
pp. 117339 ◽  
Author(s):  
Mahmood Abdulsalam Ebrahim ◽  
Santanu Karan ◽  
Andrew G. Livingston
Keyword(s):  
High Pressure ◽  
Transport Properties ◽  
Reverse Osmosis ◽  
Salt Concentration ◽  
High Recovery ◽  
Reverse Osmosis Membranes

scholarly journals Gas transport properties of PDMS-coated reverse osmosis membranes

2020 ◽  
Vol 604 ◽  
pp. 118009 ◽  
Author(s):  
Jaesung Park ◽  
Hee Wook Yoon ◽  
Donald R. Paul ◽  
Benny D. Freeman
Keyword(s):  
Transport Properties ◽  
Reverse Osmosis ◽  
Gas Transport ◽  
Gas Transport Properties ◽  
Reverse Osmosis Membranes

scholarly journals Effect of Short-Term Contact with C1–C4 Monohydric Alcohols on the Water Permeance of MPD-TMC Thin-Film Composite Reverse Osmosis Membranes

Membranes ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 92 ◽  
Author(s):  
Jaime A. Idarraga-Mora ◽  
Michael A. Lemelin ◽  
Steven T. Weinman ◽  
Scott M. Husson
Keyword(s):  
Thin Film ◽  
Transport Properties ◽  
Reverse Osmosis ◽  
Active Layer ◽  
Short Term ◽  
Film Composite ◽  
Water Permeation ◽  
Thin Film Composite ◽  
Reverse Osmosis Membranes ◽  
Water Permeance

In this paper, we discuss the effect of alcohol contact on the transport properties of thin-film composite reverse osmosis membranes. Five commercial membranes were studied to quantify the changes in water permeance and sodium chloride rejection from contact with five C1–C4 monohydric, linear alcohols. Water permeance generally increased without decreasing rejection after short-term contact. The extent of these changes depends on the membrane and alcohol used. Young′s modulus measurements showed decreased stiffness of the active layer after contacting the membranes with alcohol, suggesting plasticization. Data analysis using a dual-mode sorption model identified positive correlations of the initial water permeance, as well as the change in free energy of mixing between water and the alcohols, with the increase in water permeance after alcohol contact. We suggest that the mixing of water with the alcohols facilitates alcohol penetration into the active layer, likely by disrupting inter-chain hydrogen bonds, thus increasing the free volume for water permeation. Our studies provide a modeling framework to estimate the changes in transport properties after short-term contact with C1–C4 alcohols.

Fouling in a high pressure, high recovery rotating reverse osmosis system

Desalination ◽  
2007 ◽  
Vol 212 (1-3) ◽  
pp. 1-14 ◽  
Author(s):  
Cynthia L. Pederson ◽  
Richard M. Lueptow
Keyword(s):  
High Pressure ◽  
Reverse Osmosis ◽  
High Recovery
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