In order to improve the zeolite’s adsorption ability of ammonia nitrogen (NH4+), the modified zeolite treated by ultrasonic and sodium chloride (NaCl) was obtained and its features were characterized. The zeolite modified under the condition as follows: ultrasonic power 560 w、modification time 40 min and NaCl concentration 0.8 mol/L had the best removal efficiency of NH4+ when the initial concentration of NH4+ was 10 mg/L and the dosage of zeolite was 5 g/L. The adsorption equilibrium was reached after 120 min with the ammonia nitrogen removal rate of 91.11%, which was 86.3% higher than the natural zeolite. Second order reaction kinetics model could describe the adsorption behavior of the modified zeolite exactly with R2 of 0.991 and for adsorption thermodynamics, it followed Langmuir model with R2 of 0.9612. This study provided effective technical support for ultrasonic modified zeolite’s application in water treatment.

Modification method of natural zeolite by ultrasonic and sodium chloride

249th National Meeting (2015)

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