Functionalized Carbon Nanotube Blended Forward Osmosis Membranes for Fouling Control in Desalination

H-G Choi, M. Son, S. Yoon, H. Choi
Gwangju Institute of Science and Technology, KR

Keywords: forward osmosis, carbon nanotube, nano-composite membrane, desalination

Summary:

Reverse osmosis is core technology of desalination to overcome water scarcity issue, however it requires high operation cost and causes severe membrane fouling due to hydraulic pressure. Forward osmosis receives academic attentions again as substitute for reverse osmosis because forward osmosis needs not hydraulic pressure but osmotic pressure as driving force. There are three import issues in membrane science for water treatment, which are water flux, rejection, and membrane fouling. Nano-material is widely used to synthesize membrane to improve membrane performance due to its unique properties and applicable simplicity for the membrane synthesis. In this study, functionalized carbon nanotube blended forward osmosis membrane was synthesized and characteristics and performance was studied for desalination application from SEM, TEM, FT-IR, water contact angle measurement, water permeated flux, salt ion rejection, and fouling tendency.