Studies of Dialysis

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  • 透析法の研究　　水の浸透流を考慮した場合の総括物質移動係数の推算
  • トウセキホウ ノ ケンキュウ ミズ ノ シントウリュウ オ コウリョシタ バア
  • 水の浸透流を考慮した場合の総括物質移動係数の推算

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Dialysis experiments were carried out using a dialyzer with capillary membranes. It was found that the over-all mass transfer coefficient for dialysis U0 decreased with increasing inside flow rate of membrane qIN in the region above 7ml/min. This phenomenon could be explained by the mechanism of a solute and water transport across a membrane which became clear by deriving a diffusion equa ion of Maxwell-Stephan type taking account of the osmotic flow of water.<BR>Mass transfer coefficients in diffusion films obtained by the method of velocity variation were compared with those of the usual correlations. An almost linear concentration distribution was calculated by the mass transfer coefficients and the osmotic flow of water.<BR>Comparing the water or salt permeability of the used dialysis membrane with that of a typical cellulose acetate reverse osmosis membrane, respectively, it was found that the water permeability of the dialysis membrane was much smaller than that of a cellulose acetate membrane.<BR>The relationship between U0 and qIN for some electrolytes could be estimated from that of U0 vs. qIN for sodium chloride.

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