Transfer and Separation of Zn ( II ) / Co ( II ) by Supported Liquid Membrane Containing CYANEX 925 in Kerosene as Carrier
Transfer and Separation of Zn ( II ) / Co ( II ) by Supported Liquid Membrane Containing CYANEX 925 in Kerosene as Carrier
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煤油为载体的CYANEX 925负载液膜对Zn(II)/Co(II)的转移与分离
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. A. Daoud
中科院分区：
文献类型：
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作者：
M. Gasser;N. E. El;S. E. Rizk;J. A. Daoud
本文研究了以煤油为载体的支撑液膜（SLM）中Zn（Ⅱ）离子从硫酸盐和硫氰酸盐混合溶液中的转移，并与搅拌速率、[H]、[CYANEX 925]、[SCN]、[H_2SO_4]和氨水浓度进行了关系。实验结果表明，随着搅拌速率、料液中硫氰酸盐浓度和反萃液NH_4 OH浓度的增加，Zn（II）离子的迁移量增加。Zn（II）从其与Co（II）的混合物中的转移实验表明，CYANEX 925可以萃取Zn（II）多于Co（II）;转移速率随时间增加。所研究的SLM系统可用于从[H] = 0.01的硫氰酸盐/硫酸盐混合水溶液介质中去除Zn（II）。此外，本系统对从硫氰酸盐/硫酸盐混合水溶液介质中分离锌钴具有选择性。发现这种选择性随时间的推移而降低，60 min后达到最大值25。Zn（II）单独和从其混合物与Co（II）通过相同的膜具有合理的效率的重复转移表明，所使用的SLM是稳定和持久的。
Transfer of Zn(II) ions from a mixed sulphate and thiocyanate solution through a supported liquid membrane (SLM) containing CYANEX 925 in kerosene as carrier has been studied as a function of stirring rate, [H], [CYANEX 925], [SCN], [H2SO4] and ammonia solution concentrations. The experimental results show that the transfer of Zn(II) ions increases with the increase in stirring rate, thiocyanate concentration in the feed and concentration of NH4OH used as the stripping solution. The transfer experiments of Zn(II) from its admixture with Co(II) indicated that Zn(II) could be extracted more than Co(II) by CYANEX 925; the transfer rate increased with time. The investigated SLM system could be used for removal of Zn(II) from an aqueous mixed thiocyanate/sulphate medium of [H] = 0.01. In addition, the present system is selective for Zn-Co separation from aqueous mixed thiocyanate/sulphate medium. This selectivity was found to decrease with time and a maximum value of 25 is reached after 60 min. Repeated transfer of Zn(II) individually and from its admixture with Co(II) through the same membrane film with reasonable efficiency indicate that the used SLM is stable and durable.