于静芬
,
吉晨
,
潘小玫
,
熊毅钢
金属学报
本文研究了协同萃取体系(D_2EHPA-H_2RPA-Al~(3+))的胶团化作用和界面特性[H_2RPA为长碳链单烷基磷酸脂,D_2EHPA为二(2—乙基己基)磷酸],以及液—液界面动力学。结果发现,混合体系中H_2RPA具有较强烈的胶团化作用和较高的界面活性,随着[D_2EHPA]的增加,其胶团化倾向和界面活性随之下降,H_2RPA和D_2EHPA具有完全相反的界面吸附行为,证实了非胶束混合萃取体系的动力学控制机制为界面化学反应控制型,得到了反应速率方程式,非胶束体系为有应用前景的混合萃取剂体系。
关键词:
D_2EHPA-H_2RPA-Al~(3+)萃取体系
,
Al
,
micellization
,
interfacial kinetics
YU Jingfen JI Chen PAN Xiaomei XIONG Yigang Tsinghua University
,
Beijing
,
China
金属学报(英文版)
The interfacial kinetics,micellization and interfacial characteristics of the synergetic extrac- tion system,D_2EHPA-H_2RPA-Al~(3+),have been studied.H_2RPA is a single long chain alkyl phosphate.We have found that H_2RPA in the mixed extractant system strongly exhibits the characteristics of micellization and interfacial activity.As the concentration of D_2EHPA in- creases,the micellization and interracial activity of H_2RPA decrease.The interfacial adsorption behaviour of H_2RPA is opposite to that of D_2EHPA.It was proved that the kine- tics of non-micella mixed extraction system was controlled by the chemical reaction at inter- face,and the reaction rate equation was obtained.This non-micella mixed extraction system is expected to be used in the future.
关键词:
D_2EHPA-H_2RPA-Al~(3+) extraction system
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null
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null
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