Abstract
The kinetics of differentially small contact ion exchange processes of two adjacent resin ion exchanger beads in pure water was investigated, using radioactive tracers. Interruption tests and determination of the rates, as a function of th force with which the beads were pressed together, indicate that diffusion of the ions across the aqueous film between th beads was the rate-determining step. The experiments show that the half-times of the exchange Cs/sup +/-Na/sup +/ and Cs/sup +/-H/sup +/ decrease, if the initial Cs/sup +/ concentration in the particles is increased. With the help of the theory developed, the rate coefficients of these processes can be evaluated from the experiments. It is found that they depend strongly on the ionic composition in the case of the exchange Cs/sup +/-H/sup +/ but are almost constant when Cs/sup +/ is exchanged vs Na/sup +/. The rate coefficients of differentially small contact ion exchange processes were closely related to those of isotopic contact exchange processes. With the help of the rate coefficients of differential exchange processes the rates observed for nondifferential exchange processes are discussed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
