【摘要】 以硅溶胶为硅源、十六烷基三甲基溴化铵(CTAB)为模板剂,采用物质的量配比为Ce2O3∶SiO2∶CTAB∶H2O∶NaOH=0.015∶1∶0.45∶60∶0.48,静态水热合成了Ce-MCM-48分子筛,采用XRD、SEM(EDS)、TEM等方法对其进行了表征,并对其进行了吸附动力学研究。结果表明,本文成功合成了Ce-MCM-48介孔分子筛,其拟一级吸附动力学方程为lg(qe-q)=-0.4365-0.01026t,R2=0.9289,拟二级吸附动力学方程为t/qt=0.4027+0.27818t,R2=0.9999,相对拟一级反应模型,这个结果相关性更好,更能真实地反映分子筛吸附亚甲蓝溶液的反应机理。更多还原

【Abstract】 Ce-MCM-48molecular sieve with MWW of layer structure was synthesized using the static hydrothermal method,silica sol as silicon source,cetyl trimethyl ammonium bromide(CTAB) as template agent.Molecular sieve of Ce-MCM-48 was characterizated by power X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive X-ray(EDS),transmission electron microscopy(TEM).Ce-MCM-48 were used to adsorb the methylene blue(MB) in wastewater by a static method in order to study the absorption characteristics.The results show that,The target productobtained is the adsorption of MB follow the first-order kinetic model:lg(qe-q)=-0.4365-0.01026t,R2= 0.9289,and the second-order kinetic model:t/qt=0.4027+ 0.27818t,R2= 0.9999,the second-order kinetic model reflect the mechanism of Ce-MCM-48 adsorbed methylene blue more truly.更多还原