Abstract
A new supported liquid membrane (SLM) system for the selective transport of silver ion is introduced. The SLM used is a thin porous membrane impregnated with a recently synthesized mixed aza-thioether crown containing a 1,10-phenanthroline sub-unit dissolved in nitrophenyl octyl ether. In the presence of thiosulfate as a metal ion acceptor in the strip solution, the transport of silver occurs almost quantitatively after 3 h. The selectivity and efficiency of silver transport from aqueous solution containing excess amounts of Mg 2+, Ca 2+, Sr 2+, Ba 2+ Co 2+, Ni 2+, Cu 2+ Zn 2+, Pb 2+, Cd 2+ and Hg 2+ ions were investigated.
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