The effects of charged (anionic and cationic) and uncharged (non-ionic) surfactants (SAS) on the polarographic waves of uranium(V1) in phosphoric acid solutions of concentrations O-1, 1,5 and 10 M were investigated. The non-ionic surfactant (Triton X-100) was found to cause retardation of reactions
Effect of surfactants on the polarographic reduction of hexavalent uranium in sulphuric acid solutions
β Scribed by I.M. Issa; M. Tharwat
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 774 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0013-4686
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β¦ Synopsis
The effect of cationic, anionic and non-ionic surfactants (SAS) on the kinetics of polarographic reduction of U(V1) in sulphuric acid solution8 of different concentrations have been investigated. Both anionic and non-ionic surfactants cause retardation of the reduction process and render the waves more WeversibIe. A cationic SAS showed an opposite effect. Evaluation of the kinetic parameters has been made. The effects vary with the acid or SAS concentration. R&am&Etude de l'influence de surfactants (SAS) cationique, anionique et non ionique sur la vitesse de la reduction polarographique de U(vI) dans des solutions d'acide sulfurique de diverses concentrations. Les deux surfactants anionique et non ionique retardent le processus de reduction et rendent les vagues plus irreversibles tandis qu'SAS cationique manifeste un effet opposC. Evaluation des parametres cinetiques. De tels effets varient avec les concentrations en acide et en SAS. Zusamrnenfassung-Es wurde der Effekt von kationischen, anionischen und neutralen oberfkichenaktiven Stoffen (OAS) auf die Kin&k der polarographischen Reduktion von U(vI) in Schwefelsaure verschiedener Konzentrationen untersucht. Sowohl anionische wie nichtionische OAS bewirken eine Hemmung des Reduktionsprozesses und machen die Wellen irreversibler.
π SIMILAR VOLUMES
The kinetics of polarographic reduction of uranium(V1) has been investigated in phosphoric acid solutions of concentration 0.1, I, 1.85, 5 and IO M. In the 0.1 M acid solution two waves were obtained, whereas only one reduction wave appeared in solutions >M. The diffusion coefficient of the reacting
The anodic dissolution of lead in perchloric acid-sulphuric acid mixtures has been studied using potentiodynamic sweeps and current step measurements. As the surface concentration of lead increases, lead sulphate precipitates at the surface. This solid phase is not in equilibrium with the bulk solut
## Abstract The effect of chloride ions on the corrosion behaviour of binary ironβnickel alloys in sulphuric acid solutions has been investigated using polarization resistance and potentiodynamic polarization measurements. A moderate inhibition effect of the chloride ions on the corrosion of these