Amino acid retention with alumina gamma nanofiltration membrane

The amino acid retention with an alumina gamma nanofiltration membrane was investigated. Research was conducted on the effect of various experimental parameters such as transmembrane pressure, salt concentration and pH on the experimental retention coefficient (R-o) of mineral nanofiltration membran e. Four different amino acids (2 neutral, 1 acidic and 1 basic) were used a s solutes in NaCl (0.1 M), The behaviour of each was determined alone and i n a mixture of the four amino acids. Comparison of the experimental retenti on coefficient and the size retention coefficient indicates that charge eff ects facilitate rejection of the amino acids by alumina membrane. It was de monstrated that nanofiltration of amino acids is strongly influenced by sol ute environment and by hydrodynamic parameters. (C) 2000 Elsevier Science B .V. All rights reserved.