Journal article
The effect of DTAC on the extraction of Co(II) with Cyanex272 in a neutral micellar phase
F Xiao, Y Wang, X Shen, JM Perera, GW Stevens
Colloids and Surfaces A Physicochemical and Engineering Aspects | ELSEVIER SCIENCE BV | Published : 2015
Abstract
The equilibrium constant, Kex for the complexation between Co(II) and Cyanex272 in a neutral micelle system, Teric G12A8 (octa-ethylene glycol mono-n-dodecyl ether) was determined and the rate of the reaction was monitored using a combination of stopped flow and UV-vis spectrophotometry. A two-step mechanism was found to fit the experimental data and reaction rate constants for the forward and reverse reactions were obtained. The addition of a cationic surfactant, dodecyl trimethyl ammonium chloride (DTAC) slowed the rate of Co(II) extraction. The effect of charge on the reaction rate could be modelled based on the electrostatic surface potential generated by the added surfactant.
Grants
Awarded by Australian Research Council
Funding Acknowledgements
Support from the Australian Research Council and the Particulate Fluids Processing Centre is gratefully acknowledged. We would also like to acknowledge the China Scholarship Council, the National Natural Scientific Foundation of China (50904023) and the International Joint Research Laboratory for Advanced Nonferrous Metals of Henan, China.