Sorption studies of y-AhOJ towards phosphate anions were conducted at various concentrations and pH. The y-AhOJ was observed to be an effective anion exchange material for phosphate anions. Phosphate uptake was increased with increase in concentration and a decrease in sorption was observed with increase in pH. Desorption studies were also conducted in the pH range 3 to 9 which showed an increase in desorption with pH rise. Sorption and desorption studies accompanying the pH changes showed that the sorption was caused by electrostatic interactions (ion exchange) rather than pure physisorption i.e., non-electrostatic adsorption.
M JAVID ,S MUSTAFA ,M I ZAMAN ,S HAIDER ,A R GUL ,
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