Publication Date:
2011-09-28
Description:
The behavior of different reverse osmosis membranes, namely, HR98PP, SEPA-MS05, and DESAL-3B, was compared with the one predicted by a solution-diffusion model. This model assumes that the membrane has a homogeneous, nonporous surface layer and uses two main parameters, permeate concentration C p and volumetric permeate flux Q p , to characterize the membrane system. In order to calculate these parameters, the theoretical values of water and solute permeability constants, A w and B s , and the osmotic pressure coefficient, Ψ, were initially determined. Using the software Sigma Plot V 10.0, accurate values of Ψ, Q p , and C p were only obtained for the DESAL-3B membrane, i.e., the selected solution-diffusion model can be applied to this membrane. Three commercial reverse osmosis membranes were tested for removing aniline. The selected simple, diffusion-based solution-diffusion model was applied to predict the behavior of the system based on the two main parameters permeate concentration and volumetric permeate flux. The obtained results indicate that the suggested model can only be applied to one of the membranes.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
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Process Engineering, Biotechnology, Nutrition Technology
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