Abstract
ABSTRACT An investigation of the equilibrium and kinetic behaviour of Radiamine 6366, a tertiary amine dissolved in decane extracting Cr(VI) from acid solution is presented. Equilibrium and interfacial reaction models were used to describe the results obtained from shake tests and a modified Rotating Diffusion Cell. The modified cell allowed on-line measurement of the concentration in the aqueous phase. A second order forward reaction rate constant of 107 M−1s−1 was determined. It was shown that tri-butyl phosphate (TBP) was more surface active than Radiamine 6366 and with TBP addition, the interfacial reaction kinetics were slower.
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