| 초록 |
The removal characteristics of cadmium in micellar enhanced ultrafiltration(MEUF) were investigated by using an anionic biosurfactant, deoxycholic acid(DCA). The ultrafiltration membranes used were Millipore YM1, YM3, YM10, and YM30 which had a difference in molecular weight cut-off. The presence of cadmium ion in DCA solution tends to reduce the critical micell concentration considerably and increase the micell size. Molecular weight cut-off of UF membrane had a minimal effect on cadmium removal whereas DCA/Cd ratio had a substantial influence. When DCA/Cd ratio were 3, the removal efficiency of cadmium was more than 99.6%. A relative flux, which is defined as ratio of the flux for a separation trial to that of deionized water run using the same piece of membrane, decreased in the order YM3 ＞ YM1 ＞ YM10 ＞ YM30. |
