Electro-transport的质子,碱金属阳离子通过商业和溶剂分子与水和有机阳离子交换膜条件的解决方案

通过c .无辜,徐f, g . Pourcelly m . Kameche和z Derriche

海水淡化168 (2004)319 - 327

文摘

运输质子之间的竞争和烷基金属阳离子李+,Na +, K +和Cs + cationexchange膜(CEM),称为而言不啻,研究了电渗析过程中三个不同的配置:水/水(W / W),溶剂/水(S / W)和溶剂/溶剂(S / S)。在一个电场下,阳离子迁移的饲料对接收室隔间。金属阳离子的迁移数通常被发现是小于质子的W / W配置,解释了质子跳在水的存在。然而,在S / W配置,金属阳离子的迁移数显著增加,表明阳离子溶剂的影响。不幸的是,S / S的结果配置是没有意义的,因为酸碱滴定的质子在接收室不可靠。在这种情况下我们有限的值从原子吸收光谱获得的金属阳离子。我们相关的运输数量与W / W和S / W配置,这是成反比的张力测试期间的变化;但这并非如此的S / S的配置。最后一个配置,我们观察到的运输号码是一个功能盐溶解度和阳离子的大小。此外,电压的变化成反比盐溶解度。 The electro-transport of solvent molecules through the membrane in the S/W configuration was achieved by Raman spectroscopy. The results showed that the lowest flux was obtained with acetonitril, whilst for the remaining configurations methanol/water and N-methyl-formamid (NMF)/water, the values were almost equal. Nevertheless, the ratio of the number of moles between the solvent and the metallic cations transferred through the membrane pointed out the solvation effect. The highest value obtained was with the lithium cation.

作者

m . Kameche(1),c .无辜的(3),z Derriche(1),f .徐(1),g . Pourcelly(5)

标签

溶剂化作用()
然而,摩尔数之比和溶剂之间的金属阳离子通过膜指出了转移溶剂化作用的效果。获得的最高价值与锂阳离子。图7所示。的进化过程中电池电压的ED奈的不同解决方案

Prganic溶剂(1)
…指出了溶剂化效应。获得的最高价值与锂阳离子。关键词:电渗析;阳离子交换膜;Prganic溶剂;碱金属卤化物;溶剂化作用*通讯作者。在EuroMed 2004多海水淡化策略会议…

碱金属卤化物(1)
…polyammonium阳离子,阴离子交换膜的主要组件。海水淡化168 (2004)319 - 327 Electro-transport质子,碱金属阳离子和溶剂分子通过商业与水和有机阳离子交换膜条件解决方案m . Kamechea * C ....因为这种盐的比率计算是在良好的协议与钾溶解数量的价值。氯的存在卤化物的溶剂化作用,推导了阳离子从甲醇/ W配置后,观察到在水里。ED电池的电压取决于o…

阳离子交换膜(3)
…膜。海水淡化168 (2004)319 - 327 Electro-transport质子,碱金属阳离子通过商业和溶剂分子阳离子交换膜条件与水和有机溶液m . Kamechea * c . Innocentb f . Xub g . Pourcellyb z Derrichec集成d…

电渗析(90)
…质子和烷基金属阳离子李+,Na +, K +和Cs + cationexchange膜(CEM),称为而言不啻,研究的一个电渗析过程有三个不同的配置:水/水(W / W),溶剂/水(S / W)和溶剂/溶剂(S / S)。在一个电场,th…

结论

图7所示。的进化过程中电池电压奈和氯化钠的不同的解决方案。在hydro-organic或有机的解决方案。它可以解释为不同电导的两对夫妇盐:氯化钠或与在测试期间Na2SO4奈。溶剂的性质影响金属离子的运输通过cationexchange膜的一个教育过程。甲醇/ W配置是最有利的阳离子的转移,因为盐溶解度的差异在两个媒体和阳离子的变异大小在通过而言不啻膜。后者似乎更渗透acetonitril比甲醇和N-methyl-formamid碘化钠的存在。然而,的数量与碘化钾acetonitril大幅下降。这个结果似乎是合理的因为这种盐的比率计算是在良好的协议与钾溶解的值数。在氯卤化物的存在,溶解的推导了阳离子甲醇/ W配置,观察后的水。 The voltage of the ED cell depended on both the salt and solvent. We observed that the transport number was inversely proportional to the variation of voltage during the tests with the W/W and MeOH/W configurations, but with the MeOH/MeOH configuration, the transport number was function of cation size and its solubility in solvent. The variation of tension with this configuration was inversely proportional to the salts solubility. The co-ion was not seen in the transport number but played a role in the conductivity of solution and in the variation of voltage at the end of experiment. The feasibility of this process in both hydroorganic and organic media leads us to undertake future research by studying the transport of polyammonium cations, which are the main components of anion-exchange membranes.