By Yoshinobu Tanaka
Basic learn and commercial software of ion alternate membranes began over part a century in the past. during the ongoing study and improvement, the ion trade membrane expertise is now utilized to many fields and contributes to the development of our way of life. Ion trade Membranes states the ion alternate membrane expertise from the point of view of basics and functions. Discussing not just numerous phenomena exhibited by way of the membranes but additionally their functions in lots of fields with low-budget evaluations.* This quantity appears to be like on the most up-to-date advancements in ion trade membrane know-how* presents an entire and extensive rationalization of ion trade membranes* Easy-to-understand structure, together with many figures and tables
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Additional resources for Ion Exchange Membranes: Fundamentals and Applications
Electro-neutrality held in the membrane accelerates the movement of ions showing lower diffusion coefﬁcient, and it decelerates that of ions showing larger diffusion coefﬁcient. This event makes the movement of co-ions accelerate and that of counter-ions decelerate in an ion exchange membrane (cf. 1). The phenomenon described above is due to the Donnan potential generated at a membrane/solution interface, which result the Donnan exclusion against coions. When the concentration of co-ions is decreased extremely in the membrane, the diffusion ﬂux of the counter-ions is decreased remarkably owing to the dominant Donnan exclusion as expressed by the following equation introduced from Eqs.
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From Eqs. 36), the following Nernst equation (Nernst, 1888, 1889) is introduced. 37) If a solution 1 and solution 2 dissolving the same kind of electrolytes are partitioned by an ion exchange membrane, Eq. 38) t+ and tÀ are the transport number of cations and anions in the membrane, respectively. (a+)2/(a+)1 and (aÀ)2/(aÀ)1 are the activity ratio of cations and anions between both solutions, respectively. If the solution dissolves electrolytes consisting of monovalent cations and monovalent anions and (a+)2/ (a+)1 ¼ (aÀ)2/(aÀ)1 holds, the following equation is introduced.
Ion Exchange Membranes: Fundamentals and Applications by Yoshinobu Tanaka