2016 Vol.22 No.1 PP 59­-68

FABRICATION OF POLYSTYRENE BASED COBALT (II) AND NICKEL (II) PHOSPHATE MEMBRANES: EVALUATION OF MEMBRANE SELECTIVITY OF METAL IONS

^*R.B. SHARMA¹, S.K. VERMA, SARITA ARYA AND SHIKHA AGARWAL

¹Department of Physics, Department of Physical Chemistry
Bipin Bihari (P.G.) College, JHANSI (U.P.) INDIA.
*Corresponding Author
E-mail: rbsharma.jhansi@gmail.com

ABSTRACT

Bi-Ionic potential (BIP) values across both the membranes have been observed experimentally using various combinations of 1:1 electrolytes at different concentrations. On the other hand biionic potential (BIP) values have also been observed experimentally keeping the concentration of one electrolyte constant on one side of the membrane while varying the concentration of other electrolyte on other side of the membrane. The membrane conductance values in contact with single electrolyte at different concentrations have been measured experimentally to evaluate the selectivity of both the membranes. The theory developed by Sandblom and Eisenman based on non equilibrium thermodynamics has been utilized for the evaluation of membrane selectivity. The selectivity sequence of both the membranes was found K+ > Na+ > Li+

Key words : βi-ionic potential (BIP), Membrane conductance, Membrane selectivity, Nickel (II) phosphate membranes, Polystyrene based cobalt (II).