Phosphate/Hydroxide Exchange Studies on Amberlite IRA-400

Abstract

Phosphate sorption on the strong basic anion exchanger, Amberlite IRA-400 (OH-form ) bas been studied as a function of pH (3-11), temperature (25°C-50°C ) and in the concentration range 3.874-6.134 mmol./L. The sorption of phospbate increases with increases in temperature and concentration of the solution. However, increases in the pH above 7 leads to a decrease in the sorption of phosphate which is due to the increased competition from hydroxide ions. The data is explained with the help of a modified Langmuir equation. Various thermodynamic parameters (6.G 0 , AH 0 and AS 0 )are calculated. The differential isosteric heat of adsorption,~ , is computed at different temperatures, showing the sorption of phosphate to be endothermic on the anion exchanger Amberlite IRA-400.

Hydrometallurgical route to recover molybdenum, nickel, cobalt and aluminum from spent hydrotreating catalysts in sulphuric acid medium

“…A commercial ion-exchange resin (Amberlite IRA-400 AR, Cl − form), containing quaternary ammonium groups, was used. This resin has been used for removing P species in aqueous effluents and standard solutions [49,50]. The resin was converted into sulphate form by treating it with two volumes of 2 mol L −1 H 2 SO 4 , followed by elution with two volumes of 0.01 mol L −1 of the same acid.…”

Ligands Sorption Studies on Transition Metal Ion Loaded Amberlite IRC-50

“…The organic ion-exchange resins have attracted the attention of researchers − due to their chemical and mechanical stability, high exchange capacity, and ion-exchange rate. A great variety of such resins with different properties have been described in the literature.…”