Abstract
Cellulose triacetate ultrafiltration membranes were prepared using the casting solution consisted of formic acid, additives, and polymer. Effects of additives in casting solution on membrane performance was studied. The addition of water and inorganic salts in casting solution rendered to increase in water-permeability, but to decrease in solute retention. On the other hand, the solute retention of membrane was improved by using a solvent containing dichloromethane. Membrane separation performance were examined for various solutes, such as sacchrose, amino acid, and organic acids with low molecular weight. Saccharose and amino acids were well retained by cellulose triacetate membrane, but retention levels of membrane for organic acids and tetraethylene glycol were very poor. The retention of aromatic amino acids, such as DL-tyrosine and L-phenylalanine were less in comparision to the data of aliphatic amino acids
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