Studies on the equilibrium uptake of some metal ions on titanium arsenate and titanium tungstoarsenate gels using radiotracers

Sorption of some univalent, divalent and trivalent metal ions was studied on the hydrogen form of titanium arsenate and titanium tungstoarsenate gels as a function of initial solution concentration at pH 5-6. The effect of pH on maximum uptake (Qsub(max)) was also seen for some representative ions. Sorption of metal ion became almost negligible below pH 1.8, with the exception of monovalent cations. Rubidium ions exhibited interesting adsorption behaviour. The data were compared with the exchange properties of these two inorganic ion exchangers reported earlier. (author)