INFLUENCE OF THE CARRIER (DIBENZO-18 CROWN-6) ON LIQUID MEMBRANE IODIDE SEPARATION

Niculina-Nina Badea, Mihaela Crăciun, Ovidiu Galeş, Ludmila Iarca, Gheorghe Nechifor
2011 Bull., Series B   unpublished
A fost studiat mecanismul de transport al anionului iodură prin membrane lichide de cloroform, tetraclorură de carbon cu dibenzo-18-coroană-6 Experimentele s-au efectuat într-o instalaţie dublu jet ce constă dintr-o fază sursă (ce conţine dicromat de potasiu, acid sulfuric şi iodură de potasiu), membrana (cloroform şi tetraclorură de carbon) şi faza receptoare (soluţie de tiosulfat de sodiu). Efectul pozitiv al eterului coroană asupra transportului de iod a fost remarcat pentru ambii solventi
more » ... ru ambii solventi dar în mod special s-a remarcat acţiunea faţa de solventul nepolar, tetraclorura de carbon. Iodide anion transport mechanism of liquid chloroform and carbon tetrachloride membrane with dibenzo-18-crown-6 has been studied.. Experiments were carried out in a double jet installation consist of source phase (containing potassium dichromate, sulphuric acid and potassium iodide), membrane (chloroform and carbon tetrachloride) and receiving phase (sodium thiosulfate solution). Experiments were conducted in a double-jet installation. Iodine concentration shave been monitored. The crown ether has positive effect on the iodine transport in both solvents but especially in the non-polar solvents as carbon tetrachloride.
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