合成条件对电解锰渣制备沸石过程中沸石种类和性能的影响

Zeolites were synthesized from electrolytic manganese residue(EMR) via a two-step synthetic procedure. Based on the detailed analyses using X-Ray diffraction(XRD), scanning electron microscope(SEM), Fourier transform-infrared radiation(FT-IR) and cation exchange capacity(CEC) measurement, the major factors influencing the crystalline phase and CEC of zeolite were investigated in the aspects of molar ratio of Si to Al, reaction temperature and reaction time. The results show that the crystalline phase and CEC of zeolite are greatly affected by the molar ratio of Si to Al, reaction temperature and reaction time during the preparation process. The crystalline purity and CEC of zeolite decrease with the increase of initial molar ratio of Si to Al. And the crystalline purity and CEC of zeolite increase with the increase of reaction temperature and reaction time. Meanwhile, the optimal conditions for zeolites synthesized from electrolytic manganese residue are as follows: the initial molar ratio of Si to Al is 1.5, the reaction temperature is 100 ℃ and reaction time is 1.5 h. And the product synthesized under the optimal condition is mainly composed of Na-A zeolite with a CEC of 3.45 mmol/g. It exhibits cubic particles with a chamfered shape, and has high crystallinity, making this material a promising candidate for removal of pollutant diluted in wastewater.