- Volume 56 Issue 5
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Concentration of Sodium Chloride, Sodium Acetate and Sodium Citrate Solutions by using Polyamide Reverse Osmosis Membrane
폴리아미드 역삼투막을 이용한 염화나트륨, 아세트산나트륨, 구연산나트륨 용액의 농축
- Lee, Heungil (Department of Chemical Engineering and Applied Chemistry, Chungnam National University) ;
- Kim, In Ho (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
- Received : 2018.07.04
- Accepted : 2018.08.14
- Published : 2018.10.01
Reverse osmosis (RO) concentration of sodium chloride, sodium acetate, and sodium citrate solutions has been performed by polyamide RO membrane. Concentration polarization phenomena was also studied by changing pressure, solute kinds, and initial solution concentration. Pressure effect on permeation flux was that the increase of flux was accompanied by the increase of pressure. Flux increase was observed by the decrease of initial solution concentration. Surface concentration on the RO membrane increases and so flux declines due to the concentration polarization. In the later phase of concentration, concentration polarization effect was decreased by the back diffusion of solute from the polariztion layer. In case of sodium citrate, its large ion size and charge density resulted in the discrepancy between theory and experimental data of concentration polarization. It may be due to electric repulsion on the membrane surface.
Reverse osmosis;Salts permeation;Concentration polarization
Supported by : 충남대학교
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