摘要
本文研究了协同萃取体系(D_2EHPA—MPA—Fe^(3+))的胶团形成热力学、界面特性、协萃效应和界面动力学(动力学控制机制和反应速率方程)研究发现,混合萃取体系中的D_2EHPA强烈地影响MPA的胶团形成热力学和界面吸附行为,得到了胶团生成常数(K_m)、胶团形成自由能(△G_m)和临界胶团浓度(CMC)的热力学参数D_2EHPA和MPA具有相反的界面吸附行为研究发现D_2EHPA—MPA混合萃取剂体系对Fe^(3+)产生了协萃效应动力学和界面化学的研究结果还证实了非胶束混合萃取体系的Fe^(3+)的萃取过程是受化学反应控制的。
The interfacial chemistry, synergistic effects and interfacial kinetics of thesynergistic extraction system D_2EHPA-MPA-Fe^(3+) have been studied, where MPA is amono-alkyl phosphate extraction with long carbon chain. D_2EHPA in the mixed extractionsystem strongly exhibits the effect on the thermodynamics of micella formation and interfaceproperties of MPA. Some thermodynamic parameters of micella formation were obtained.The interfacial adsorption behaviour of D_2EHPA is opposite to that of MPA. Theemulsification for single MPA and the mixed system was discussed. The synergistic effectswere found in this mixed extraction system. It is proved that the process of Fe^(3+) extractionfor non-mixed extraction system is controlled by chemical reaction, the controlling reactionoccurs at the interface, and the reaction rate equation is obtained.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第5期B200-B206,共7页
Acta Metallurgica Sinica
基金
国家自然科学基金
关键词
界面化学
协萃效应
FE^3+
interfacial chemistry
synergistic effect
Fe^(3+)
extraction kinetics
