定常法による平面状膜の拡散係数の新しい測定装置

概要

論文の詳細を見る
We intended to make an apparatus for measuring a diffusion coefficient D. The measurement is performed on the basis of Fick's first low of a diffusion (referred to as the stationary state method). The theoretical equation to give D from the experimental value of the concentration of the diffusional component was derived. The apparatus was designed so as to satisfy the prerequisite of the equation. The two solutions of the rooms of feed side and diffusion side were suplied with constant speed separately resulting in the accomplishment of the stationary state. In order to minimize the contribution of the filtration to the mass transportation through a membrane, following two means were employed : (1) A synchronous feed pump was used at the inlet and outlet of the diffusion side room for realizing the same speeds of feeding a liquid and of pulling out from the outlet. (2) Even if the small difference in the above speeds exists, the difference within a given level is designed to be compensated by the deformation of a membrane. Two membranes of barium alginate and of composite of barium alginate and Allaska Pollack roe membrane were used. The experimental D value of CuSO_4 in water for the barium alginate membrane was 1.30×10^<-7>cm^2/sec at 303K and was fairly coincided with that reduced from the literature concerning with the hydrophilic polymer solids. The apparent activation energy ΔHa of the diffusion was -11.7kJ/mol. As for the composite membrane, the D value was 3.09×10^<-7>cm^2/sec and ΔHa was 16.7kJ/mol. We concluded that the novel apparatus could give D value under a stationary condition.
福岡女子大学の論文
2000-02-25

定常法による平面状膜の拡散係数の新しい測定装置

スポンサーリンク

概要

著者

関連論文

スポンサーリンク