镉离子在N_(235)为载体的液膜体系中的传输

Transport of Cd(II) Ions Through a Liquid Membrane Using N 235 as a Mobile Carrier

研究了Ｃｄ（Ｉ）在Ｎ２３５－ＣＣｌ４大块液膜体系中的迁移规律．实验表明，温度升高、Ｎ２３５浓度和料液酸度增加、料液相添加少量Ｉ－，均使Ｃｄ（Ｉ）的迁移速率加快．醋酸铵作反萃剂比氢氧化钠好，在同向偶合传输实验中观察到镉在膜中的滞留现象．

An experimental study of Cd(II) transport through carbon tetrachloride bulk liquid membrane containing N 235 [tricapryl amine,N(C n H 2 n +1 ) 3, n =8～10] as carrier has been performed.The experimental results show that the transport rates of Cd(II) increase with increasing of temperature and concentration of N 235 and H + in the feed.I - added in the feed solution can promote the transport of cadmium ions.Ammonium acetate as stripping agent is more better than sodium hydroxide.When Cd(II) ions is transferred from a feed solution to a strip solution through the bulk liquid membrane there is measurable accumulation of Cd(II) in the membrane.The permeability coefficient,P(cm/s),of Cd (II) ions through a supported liquid membrane containing a higher carrier concentration has been measured.