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以十六烷基三甲基溴化铵(CTAB)改性沸石作为吸附剂,研究了其对水溶液中甲基橙(MO)的吸附行为。用红外光谱(FT-IR)和BET方法对沸石进行了表征。研究表明,CTAB改性沸石对MO的吸附符合Langmuir模型,在pH值为7、温度为298.15K、振荡速度为160r/min时,CTAB改性沸石对MO的最大吸附量为82mg/g。动态吸附实验表明,CTAB改性沸石对MO的吸附动力学可以用准二级动力学方程描述,说明它的吸附机理是一个物理与化学吸附过程。
The adsorption behavior of methyl orange (MO) in aqueous solution was studied with cetyltrimethylammonium bromide (CTAB) modified zeolite as adsorbent. The zeolite was characterized by infrared spectroscopy (FT-IR) and BET method. The results show that the adsorption of MO on CTAB modified zeolite conforms to the Langmuir model. The maximum adsorption capacity of CTAB modified zeolite to MO is 82mg / g at pH 7, temperature 298.15K and oscillation speed 160r / min. Dynamic adsorption experiments showed that the kinetics of MO adsorption by CTAB modified zeolite can be described by pseudo-second-order kinetic equation, indicating that its adsorption mechanism is a physical and chemical adsorption process.