STUDY ON TREATMENT OF AMMONIUM IN AQUEOUS SOLUTION BY COMMECIAL ZEOLITE

Abstract

This paper presents a solution of ammonium removal from aqueous by adsorption of commercial zeolite. Main factors affecting the adsorption process were studied, including pH value, contact time and initial concentration of ammonium. Research results show that adsorption process depend strongly on pH value, contact time and initial concentration of ammonium. The optimal conditions for the adsorption process was obtained at pH = 6, 120 min of contact time and 60 mg/L concentration of ammonium. Adsorption kinetics and isotherms models were studied. Results show that adsorption kinetics was well described by both Pseudo-second-order and Elovich models with the correlation coefficient greater than 0.97. Adsorption isotherms was well described by Langmuir isotherm model with the correlation coefficient of 0.9711. The maximum adsorption capacity determined experimentally was 17.01 mg/g. The maximum adsorption capacity calculated according to Langmuir model is 17.47 mg/g which is very close to the experimental value.