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Redox aspects regarding the transfer of some heavy metal ions through semipermeable membranes

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: C.V.Zanoaga, C.V.Uglea, G.Nechifor

Editorial: Revue Roumaine de Chimie, 35(7-9), p.923-925, 1990.


A sulfonate semipermeable membrane was studied for separation two phase, one of 3% solution CuSO4.5HOH, ZnSO4.7HOH and MnSO4.HOH, the latter made invariably of KCl sat/1000. The former phase was permanently strred, while the latter was redox buffered, at various rH values, by means a redoxtron, for 8 hours.The transfer of Cu, Zn, Mn, respectively, from the former towards the latter phase was observed as occuring specifically for each metal, the membrane being permeable only in some rH ranges, that may be connected with the valence of each ion. The situation make possible the control of the transfer through the membrane so that adjustment of rH value of the receiving phase ensures the transfer of the corresponding metal.

Cuvinte cheie: redox transfer, semipermeable membranes, heavy metal ions separation, redox control