中空糸支持型液体膜用支持材質と膜寿命

概要

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The permeation experiments of Cu2+ were carried out through liquid membranes supported on four kinds of porous hollow fibers, which contained LIX-65N of concentration ; 0.047-0.094, 1.6, 15-16 [mol/m3] as mobile carrier and kerosine and O-xylene of volumeric composition ratio ; 100/0, 75/25, 25/75, 0/100 [vol%/vol%] as diluent. The hydrophobic membranes were better for supporter than the hydrophilic. The richer the O-xylene was contained as diluent, the more remarkably the destruction of membranes occurred. By means of saturating both feed and recovery solutions with liquid membrane solution, the flux of Cu2+ through membrane was stabilized more than 50 days. It was found that the interfacial reaction between Cu2+ and LIX-65N on the membrane facing feed solution was rate determining step. The flux of Cu2+ through membrane was proportional to the first power of [HR] f, (concentration of mobile carrier in membrane on feed solution side), in region of [HR] f, greater than 0.1 [mol/m3] and the second power of [HR] f, less than 0.1 [mol/m3].
日本膜学会の論文