Abstract
Sorption of Ag+ by natural mordenite and its Na-exchanged form was investigated by the batch method. Maximum Ag+ uptake was observed at initial pH > 3.0 and contact time 90 min. The kinetic data fitted very well to the pseudo-second-order rate model with values of k 2 from 37.31 to 0.487 and 48.32 to 0.491 g/meq min for the natural and Na-exchanged mordenite, respectively. The Langmuir model is in good correlation with the isotherm data up to initial concentration of 500 mg Ag+/L (q m = 57.41 (natural sample) and 87.72 mg/g (Na-exchanged sample). The obtained data are promising for clean-up of polluted water.
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