Electrokinetic characterization of composite membranes: estimation of different electrical contributions in pressure induced potential measured across reverse osmosis membranes

2000 ◽  
Vol 172 (1-2) ◽  
pp. 189-197 ◽  
Author(s):  
J Benavente
Keyword(s):  
Reverse Osmosis ◽  
Composite Membranes ◽  
Electrokinetic Characterization ◽  
Reverse Osmosis Membranes

Surface Modification of Composite Membranes by Coating PVA/TiO2 Layer

2015 ◽  
Vol 804 ◽  
pp. 299-303
Author(s):  
Baturalp Yalcinkaya ◽  
Jiri Chaloupek
Keyword(s):  
Waste Water ◽  
Reverse Osmosis ◽  
Metal Ion ◽  
Sea Water ◽  
Composite Membranes ◽  
Aluminum Production ◽  
Filtration Process ◽  
Ion Rejection ◽  
Reverse Osmosis Membranes

Water pollution comprises all of those compounds that change the quality of groundwater and surface water, therefore reducing the suitability of natural water for human use and other vital processes. These compounds result from human activities, especially those that are industrial, agricultural and domestic.The polyamide thin film composite reverse osmosis membranes become important in desalination of sea water and brackish water or waste water. However the polyamide reverse osmosis membranes tend to fouling due to their hydrophobic and rough surfaces. In this study flux and rejection of waste water from aluminum production industry were obtained during filtration process by using modified commercial composite membranes. Amount of fouling was evaluated with unmodified and modified membranes. Rejection of iron particles and PH of feed and permeate solutions were determined after filtration process. Results shows that modified membranes were performed higher metal ion rejection and antifouling performance than unmodified membranes.

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