| 镧离子经过2-乙基己基膦酸单-α-乙基己酯-煤油液膜的传输动力学 |
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| 引用本文： | 马铭,何鼎胜,袁帅,朱小兰,谢青季,姚守拙.镧离子经过2-乙基己基膦酸单-α-乙基己酯-煤油液膜的传输动力学[J].湖南师范大学自然科学学报,2002,25(2):49-53. |
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| 作者姓名： | 马铭 何鼎胜 袁帅 朱小兰 谢青季 姚守拙 |
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| 作者单位： | 湖南师范大学化学化工学院化学系,中国,长沙,410081 |
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| 基金项目： | ThisresearchissupportedbytheNaturalScienceFoundationofChina (2 990 5 0 0 2 ) |
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| 摘 要： | 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.
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| 关 键 词： | 2－乙基己基膦酸单－α－乙基己酯－煤油液膜 传输动力学 跨膜迁移 表观活化能 表观反应速率 |
Kinetics of Liquid Membrane Transport of Lanthanum(Ⅲ)Ions Through Mono(2-Ethylhexyl)2-Ethylhexyl Phosphonate-Kerosene |
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| Abstract.Kinetics of Liquid Membrane Transport of Lanthanum(Ⅲ)Ions Through Mono(2-Ethylhexyl)2-Ethylhexyl Phosphonate-Kerosene[J].Journal of Natural Science of Hunan Normal University,2002,25(2):49-53. |
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| Authors: | Abstract |
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| Abstract: | 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. |
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| Keywords: | bulk liquid membrane (BLM) support liquid membrane (SLM) kinetics lanthanum ion mono(2 ethylhexyl)2 ethylhexyl phosphonate [HEH(EHP) P 507 ] |
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