Effective self‐diffusion coefficients of ¹⁴C‐urea in a polyphenolsulfonic acid cation exchange membrane in the presence of different counterions

Abstract

Effective self‐diffusion coefficients of the polar non‐electrolyte urea were obtained from tracer experiments with 14C‐urea. For a membrane loaded with Na+ the tracer‐diffusion coefficient was investigated as a function of the total urea concentration. Also tracer‐diffusion was observed for membranes loaded with different counterions at constant urea concentration in solution.

Cobalt(II) and Nickel(II) Transfer through Charged Polysulfonated Cation Exchange Membranes

“…Many studies on the diffusion of ions and molecules through ion exchange membranes have been reported (7)(8)(9)(10)(11)(12)(13). The permselectivity of these membranes is a consequence of co-ion exlusion, which is conventionally described by the classical Donnan equilibrium equations (14)(15)(16).…”

Transport of Cu(II) ions through charged cation‐exchange membranes

“…Ion‐exchange membranes have found numerous applications in industrial processes,1–9 but many questions regarding their transport behavior is not well understood. In applications of the membranes, it is important to develop as detailed an understanding as possible about the underlying relationships between the membrane structure and the transport properties.…”