The use of rotating disk electrodes for the study of the kinetics of sorption processes. II. Ion exchange of copper(II) on Dowex 50 WX 8 in KCl media

1973 ◽  
Vol 38 (8) ◽  
pp. 2441-2444 ◽  
Author(s):  
F. Vydra ◽  
M. Štulíková
Keyword(s):  
Ion Exchange ◽  
Rotating Disk ◽  
Disk Electrodes ◽  
Kinetics Of ◽  
Kinetics Of Sorption

The kinetics of sorption by ion exchange resin beds

AIChE Journal ◽  
1966 ◽  
Vol 12 (2) ◽  
pp. 304-308 ◽  
Author(s):  
Charles J. Colwell ◽  
Joshua S. Dranoff
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Kinetics Of ◽  
Kinetics Of Sorption

scholarly journals La dissolution anodique du cuivre en présence d'ions F− dans des solutions aqueuses acides

1987 ◽  
Vol 65 (9) ◽  
pp. 2109-2113 ◽  
Author(s):  
E. Potvin ◽  
M. Drogowska ◽  
H. Ménard ◽  
L. Brossard
Keyword(s):  
Anodic Dissolution ◽  
Rotating Disk ◽  
Copper Electrode ◽  
Limiting Factor ◽  
Uniform Corrosion ◽  
Acidic Solutions ◽  
Rate Of Dissolution ◽  
Disk Electrodes ◽  
Kinetics Of ◽  
Cyclic Voltamperometry

The influence of F− ions on the anodic dissolution of copper in aqueous acidic solutions (pH 1.6–6), mainly at pH 5 with 0.1 M KF, has been studied. The nature of the changes that occur on the electrode during the oxidation has been examined by cyclic voltamperometry as well as by different techniques of surface analysis (SEM, XPS, AES). To determine the mechanism of the electrochemical oxidation of copper at pH 5, studies with rotating disk electrodes have been carried out under conditions giving rise to a general dissolution of copper. At pH 1.6–6, the copper electrode dissolves uniformly, i.e., without preferential zones on the surface, when it is submitted to a potentiodynamic polarization (10 mV s−1) at potentials above 0 VECS. At slightly acidic pH (pH 5, KF0.1 M), with a sweep of potential up to +0.5 V, the oxidation of copper begins with a generalized corrosion of the electrode and it is followed by the formation of a film of Cu2O that is not passivating; as the oxidation proceeds, the current drops and the electrode becomes passivated. One model for the anodic dissolution is presented for the results obtained at pH 5. When a uniform corrosion develops on the rotating electrode, the copper is oxidized to Cu2+ ions. When ω → 0, the rate of dissolution of the electrode is limited by the diffusion of the Cu2+ ions from the electrode to the solution, whereas when ω → ∞ the process of charge transfer is the limiting factor to the kinetics of the dissolution. [Journal translation]

Kinetics of sorption of certain polyphenols on ion-exchange resins

1976 ◽  
Vol 10 (2) ◽  
pp. 215-218
Author(s):  
P. A. Yavich ◽  
A. G. Sarabunovich ◽  
P. Z. Beridze
Keyword(s):  
Ion Exchange ◽  
Ion Exchange Resins ◽  
Exchange Resins ◽  
Kinetics Of ◽  
Kinetics Of Sorption
Sign in / Sign up

Export Citation Format

Share Document