碱土金属离子在焦磷锑酸锡上的离子交换过程动力学  

Study of Ion Exchange Kinetics for AlkaHne Earths on Stannic Antimonialpyrophosphate

作　　者：郭鹏[1] 刘锦春[1] 刘良斌[1] 程介克[1] 

机构地区：[1]武汉大学化学系,430072

出　　处：《色谱》1991年第1期45-49,共5页Chinese Journal of Chromatography

摘　　要：焦磷锑酸锡(SSbPP)是我们新近合成的一种新型无机离子交换剂,对稀碱金属和某些高价金属离子具有很高的选择性。 众所周知,离子交换过程是一个复杂的物理-化学过程,动力学的研究有助于揭示这一过程的反应机理。早年的研究大多采用“Bt判别法”,但此法很难准确地描述离子交换反应的实际过程。In this paper,the kinetics of ion exchange reaction for alkaline earths on a new inorganic iop exchanger-Stannic Antimonialpyrophosphate (H-SSbPP) were proposed.The efffects of the metal ion concentrations,the exchanger particle sizes and the temperatures on the kinetics of ion exchang reaction were approached.The self-dif-fusion coefficients (D0),the activation energies (Ea) and the activation entropies (△S*) of alkline earths were calculated by solving the Nernsf-Planck equations with Apple-n Computer.The linear relations between the bare ionic radius of alkaline earths r0 and lgD0;Ea and AS* have been obtained,which are useful for predicting the ion exchange mechanism taking place on the SSbPP.

关 键 词：碱土金属离子 焦磷锑酸锡 离子交换 

分 类 号：O614.11[理学—无机化学]