NDLI: Studies on the macrocycle mediated transport of some metal cations through a bulk liquid membrane system using kryptofix 22

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Studies on the macrocycle mediated transport of some metal cations through a bulk liquid membrane system using kryptofix 22

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Studies on the macrocycle mediated transport of some metal cations through a bulk liquid membrane system using kryptofix 22

Content Provider	Springer Nature Link
Author	Hashemi Nejad, R. Rounaghi, G. H. Karimian, F.
Copyright Year	2016
Abstract	Competitive transport experiments involving Fe$^{+3}$, Cr$^{+3}$, Ni$^{+2}$, Co$^{+2}$, Ca$^{+2}$, Mg$^{+2}$ and K$^{+}$ metal cations from an aqueous source phase through some organic membranes into an aqueous receiving phase have been carried out using 4,13-diaza-18-crown-6 (kryptofix 22) as an ionophore present in the organic membrane phase. Fluxes and selectivities for competitive of the metal cations transport across bulk liquid membranes have been determined. A good selectivity was observed for K$^{+}$ cation by kryptofix 22 in 1,2-dichloroethane (1,2-DCE) membrane system. The sequence of selectivity for potassium ion in the organic solvents was found to be: 1,2-DCE > DCM (dichloromethane) >CHCl$_{3}$. The transport of K$^{+}$ cation was also studied in the DCM-1,2-DCE, CHCl$_{3}$-1,2-DCE and CHCl$_{3}$-DCM binary mixed solvents as membrane phase. A non-linear relationship was observed between the transport rate of K$^{+}$ ion and the composition of these binary mixed solvents. The amount of K$^{+}$ transported follows the trend: DCM-DCE > CHCl$_{3}$-DCE > CHCl$_{3}$-DCM in the bulk liquid membrane studies. Then, the selective transport of K$^{+}$ cation through a DCM-1,2-DCE bulk liquid membrane was studied by kryptofix 22 as an efficient carrier. The highest transport efficiency was obtained by investigating the influence of different parameters such as the concentration of kryptofix 22 in the membrane phase, pH of the source and the receiving phases and the equilibrium time of the transport process. Maximum transport value of 71.62 ± 1.61% was observed for K$^{+}$ ion after 4 hours, when its concentration was 4 × 10$^{–3}$ M.
Starting Page	918
Ending Page	925
Page Count	8
File Format	PDF
ISSN	00360236
Journal	Russian Journal of Inorganic Chemistry
Volume Number	61
Issue Number	7
e-ISSN	15318613
Language	English
Publisher	Pleiades Publishing
Publisher Date	2016-07-22
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Materials Science Inorganic Chemistry

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