Abstract
The selectivity changes occuring on thermal treatment of crystalline antimonic(V) acid, as a cation exchanger, have been measured for different alkali metal ions in temperature range 100–700°C. The adsorption for microamount of alkali metal ions studied showed a maximum on the sample heated at 330°C. The selectivity sequences showed K + < Cs + < Rb + on the sample heated up to 330°C, and K + < Rb + < Cs + on the sample heated at 380 or 500°C. No adsorption was observed on the sample heated at 700°C because of Sb 6O 13 formation.
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