In this study, ultrasonic and sodium chloride (NaCl) were applied to modify natural zeolite obtained from Liaoning province in China and the adsorption characteristics were investigated. The results showed that the modified zeolite performed much better than the natural zeolite in the adsorption of ammonia nitrogen (NH4+). When the initial concentration of NH4+ was 10 mg/L and the dosage of zeolite was 5 g/L, the saturated adsorption would be reached after 20 min. The removal rate of ammonia nitrogen by the modified zeolite was 90.06%, which was 81.6% higher than the unmodified zeolite. The results from SEM and BET showed that the specific surface area and the pore volume reduced and the aperture rised. 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. Moreover, according to the fitting, the maximum adsorption capacity of the modified zeolite reached 12.56 mg/g.

Study on the adsorption of ammonia Nntrogen on zeolite modified by ultrasonic and sodium

249th National Meeting (2015)

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