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STUDY OF REVERSE TRANSPORT PHENOMENA BASED ON NONEQUILIBRIUM THERMODYNAMICS
Yang, Wong-Kang 동국대학교 경주대학 1990 論文集 Vol.9 No.-
A reverse transport in liquid membrane system was studied according to nonequilibrium thermodynamics. The electrochemical affinities which drive the ion fluxes in the system coupled to chemical reaction were definitely described in the form of the dissipation function and it was indicated that he system can be recognized as the ordinary physicochemical system. Moreover, based on the equations developed in this study, several membrane parameters were estimated and the correlation between the diffusional ion conductance and ion concentration within the liquid membrane was examined and discussed.
Diffusion Coefficients and Membrane Potential within Carrier Membrane by Reverse Transport System
Yang, Wong-Kang,Jeong, Sung-Hyun,Lee, Won-Chul The Membrane Society of Korea 2002 Korean Membrane Journal Vol.4 No.1
The diffusion coefficients of ions in the reverse transport system using the carrier mediated membrane were estimated from the diffusional membrane permeabilities and the ion activity in membrane system. In the aqueous alkali metal ions-membrane system diffusional flux of alkali metal ions driven by coupled proton was analyzed. The aqueous phase I contained NaOH solution and the aqueous phase II also contained NaCl and HCl mixed solution. The concentration of Na ions of both phases were $10^{0},\;10^{-1},\;10^{-2},\;5{\times}10^{-1}\;and\;5{\times}10^{-2}\;mol{\cdot}dm^{-3}$ and the concentration of HCI in aqueous phase II was always kept at $1{\times}10^{-1}\;mol{\cdot}dm^{-3}$. Moreover, the carrier concentration in liquid membrane was $10^{-2}\;mol{\cdot}dm^{-3}$. The results indicated that the diffusion coefficients depend strongly on the concentration of both phases electrolyte solution equilibriated with the membrane. The points were interpreted in terms of the energy barrier theory. Furthermore, eliminating the potential terms from the membrane equation was derived.
Transport Coefficients across Charged Mosaic Membrane
Yang, Wong-Kang Korean Chemical Society 2004 Bulletin of the Korean Chemical Society Vol.25 No.5
In previous studies, charged mosaic membranes having two different fixed charges in the membrane matrix indicated unique transport behavior such as preferential material transport. In this study, the composite charged mosaic membrane endurable to mechanical pressure in practical application was investigated from the same aspect of solute and solvent transport as before. Lp and ${\omega}$ estimated by taking account of active layer thickness were satisfactorily consistent with those in mosaic membrane without reinforcement. On the other hand, the reflection coefficient s indicated the negative value that suggests preferential material transport.
Transport Properties of Anions Across Polymeric Separation Membrane
Yang, Wong Kang 한국공업화학회 2001 응용화학 Vol.5 No.2
Anion moving in the aqueous solution and diffusion through the anion exchange membrane with functional group that role of the strong basic exchanger group for selected anion compound materials has been actively reported. In this work polymeric anion exchange membrane which contained copolymer of chloromethylstyrene and divinylbenzene with trimethylamine, were prepared. The anion exchange membrane having exchanger groups with hydrophobic properties were examined and the ion transport of ClO₄, NO₃, Br, and Cl relative to OH with AMH membrane by Tokuyama Soda Co. Ltd.. It is also the case with the AMH permeable membrane studied for containing ClO₄, NO₃, Br, Cl solution in present two component system before above[1]. The results were several membrane parameters were estimated the correlation between the ion diffusion and Donnan potential across ion exchange membrane.