Selective transport of silver ion through a supported liquid membrane using hexathia-18-crown-6 as carrier.
A facile supported liquid membrane (SLM) system for the selective and efficient transport of silver ion is introduced. The SLM used is a thin porous polyvinyldifluoride membrane impregnated with hexathia-18-crown-6 (HT18C6) dissolved in nitrophenyloctyl ether. HT18C6 acts as a specific carrier for the uphill transport of Ag+ ion as its picrate ion paired complex through the SLM. In the presence of thiosulfate ion as a suitable stripping agent in the strip solution, transport of silver occurs almost quantitatively after 4 h. The selectivity and efficiency of silver transport from aqueous solutions containing other Mn+ cations such as Mg2+, Ca2+, Co2+, Ni2+, Cu2+, Zn2+, Pb2+, Cd2+, Hg2+, Fe3+ and Cr3+ ions were investigated.
Shamsipur
M
M
Department of Chemistry, Razi University, Kermanshah, Iran.
Azimi
G
G
Mashhadizadeh
M H
MH
Madaeni
S S
SS
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D043844:Crown Ethers; D004785:Environmental Pollutants / Q000378:metabolism; D006573:Heterocyclic Compounds, 1-Ring / Q000737:chemistry*; D007202:Indicators and Reagents / Q000378:metabolism; D007477:Ions / Q000378:metabolism*; D008567:Membranes, Artificial; D010851:Picrates / Q000737:chemistry; D011145:Polyvinyls / Q000378:metabolism*; D012834:Silver / Q000737:chemistry*; D012996:Solutions / Q000378:metabolism; D013457:Sulfur Compounds; D013885:Thiosulfates / Q000737:chemistry; D047248:Crown Compounds; D005465:Fluorocarbon Polymers
D043844:Crown Ethers; D004785:Environmental Pollutants; D006573:Heterocyclic Compounds, 1-Ring; D007202:Indicators and Reagents; D007477:Ions; D008567:Membranes, Artificial; D010851:Picrates; D011145:Polyvinyls; D012834:Silver; D012996:Solutions; D013457:Sulfur Compounds; D013885:Thiosulfates; C441452:1,4,7,10,13,16-hexathia-18-crown-2,3,11,12-tetraone; D047248:Crown Compounds; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers; C050460:silver picrate