Sorption of tungsten on alumina in dynamic conditions
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The sorption of tungstate anions on alumina from aqueous solutions of sodium chloride was investigated in dynamic conditions. The breakthrough curves as the function of W and NaCl concentrations, pH and the flow rates were determined. The breakthrough capacities, the capacities at C/C-0 = 0.5, the total column sorption capacities and the utilization degrees or column efficiencies, were determined. The obtained tungstate anion sorption data fit with a Langmuir-type isotherm. The values of the breakthrough capacity, Q(0.9)(max), the Langmuir equilibrium constant or affinity parameter, K-L, and the free energy change, Delta G, of tungsten sorption were also determined.