Recovery of silver nitrate by transport across a liquid membrane containing dicyclohexano 18 crown 6 as a carrier |
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| Affiliation: | 1. School of Pharmacy, Liaoning University of Traditional Chinese Medicine, Dalian 116600, China;2. Department of Neurology, Linyi People''s Hospital, Linyi 276003, China;3. Department of Pharmaceutical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China |
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| Abstract: | The solvent extraction and transport through a bulk liquid membrane of silver nitrate from a copper nitrate medium by dicyclohexano 18 crown 6 (DC18C6) in dichloromethane takes place via the formation of the complex ion pair Ag(DC18C6)NO3 in the organic phase. The selectivity of the transfer process characterises the semi-permeability of the liquid membrane, which is able to concentrate silver cations. Results show that the transport is well described by the two-film theory. |
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