CAJ | 학술논문

以2-乙基己基膦酸单-α-乙基己酯为载体,考察了料液相pH、膜相载体浓度、反萃相盐酸浓度及温度对液膜迁移镧离子的影响.获得了不同温度下的表观反应速率常数.萃取和反萃取反应的表观活化能分别为15.2 kJ*mol-1和26.6 kJ*mol-1.结果表明,镧离子的跨膜迁移过程可以两个串联的准一级不可逆过程进行描述.
이2-을기기기련산단-α-을기기지위재체,고찰료료액상pH、막상재체농도、반췌상염산농도급온도대액막천이란리자적영향.획득료불동온도하적표관반응속솔상수.췌취화반췌취반응적표관활화능분별위15.2 kJ*mol-1화26.6 kJ*mol-1.결과표명,란리자적과막천이과정가이량개천련적준일급불가역과정진행묘술.
Coupled transports of La(Ⅲ)ions were carried out by means of liquid membranes containing mono(2-ethylhexyl)2-ethylhexyl phosphonate in kerosene. The influences of pH in the feed solution,carrier concentration in the membrane phase, HCl concentration in the stripping solution, and temperature were investigated. The kinetics of La(Ⅲ) transport could be analyzed in the formalism of two consecutive irreversible pseudo-first order reactions.The pseudo-first order apparent rate constants of the interfacial transport of La(Ⅲ) species were determined with bulk liquid membrane,altering temperature.The apparent activation energy values are 15.2 kJ*mol-1for extraction and 26.6 kJ*mol-1for stripping, respectively.