ADSORPTION-ISOTHERM EQUATION FOR COEXISTENCE OF 2 KINDS OF METAL-IONS IN ACIDIC SOLUTION ON CHELATING RESIN

Adsorption isotherms for the coexistence of two metal ions (combinations of Zn**2** plus , Cd**2** plus , and Pb**2** plus ) in acidic solutions on chelating resins were measured at 25 degree C. They were analyzed in relation to the adsorption isotherm equation of a single metal ion, Q equals Q//m//a//x/(1 plus AC//M** minus ** alpha C//H** beta ), as was reported in a preceding paper. It is found that the adsorption isotherms of two metal ions (i and j) in acidic solution on chelating resins can be generally expressed by the equation which is presented. The adsorption capacities of two metal ions in acidic solution can be obtained from the isotherms parameters A//i, alpha //i, alpha //j, beta //i and beta //j for an individual single metal ion and only one additional parameter K//i,//j is needed.