【摘要】 为提高伊利石对重金属离子的吸附性能,以伊利石为主要原料,碳酸钙和石膏为活化辅料,采用焙烧水热合成法制备沸石相复合材料（ZPC）,研究其对Mn²⁺的吸附效果。探讨了溶液p H值、ZPC投加量、吸附时间等因素对Mn²⁺去除率的影响并进行动力学和热力学模拟。结果表明,吸附最佳p H值为5,饱和吸附时间为180 min,当Mn²⁺初始质量浓度为25 mg/L,吸附剂投加量为0.6 g/L,ZPC对Mn²⁺的最大去除率为99.32%,明显高于焙烧活化物和伊利石。ZPC对Mn²⁺去除过程符合Freundlich等温吸附模型和准二级动力学模型,说明吸附以多分子层化学吸附为主。根据ZPC吸附Mn²⁺前后的X射线衍射（XRD）、扫描电镜（SEM）与X射线光电子能谱（XPS）表征分析可知,吸附机理主要为离子交换和化学沉淀共同作用。更多还原

【Abstract】 In order to improve the adsorption capacity of illite for heavy metals, zeolite phase composite（ZPC） was first prepared by calcination with illite, calcium carbonate and gypsum and then by hydrothermal process with those activator as raw materials and used to adsorb Mn²⁺ from aqueous solution. The effect of solution pH, adsorbent dosage and contact time were investigated by adsorption experiment. Also, the kinetic model and adsorption isotherm model of ZPC for removing Mn²⁺ were fitted. It was found that the saturated adsorption time was 180 min and the optimum pH value was 5. When the initial concentration of Mn²⁺ was 25 mg/L and the adsorbent dosage was 0.6 g/L, the maximum removal efficiency for Mn²⁺ by ZPC was 99.32% which was much higher than only calcined activator without hydrothermal treatment and illite. The removal process was in accordance with Freundlich isotherm and the pseudo second-order kinetic model, which proved the process was dominated by monolayer chemical adsorption. Finally, the ZPC adsorbents before and after Mn²⁺ adsorption were characterized by XRD, SEM, and XPS in order to help to understand adsorption mechanism. So, the conclusion was drawn that the principal adsorption mechanism of Mn²⁺ was ion exchange between Ca²⁺ and Mn²⁺ followed precipitation.更多还原