中文摘要：

采用氧氯化锆、Fe^2＋、Fe^3＋和天然沸石等材料制备了锆-Fe2O4^-沸石复合材料，并考察了锆-Fe3O4-沸石复合材料对水中磷酸盐和铵的去除作用。锆-Fe3O4-沸石复合材料对水中磷酸盐的去除能力随着溶液pH的增加而降低。锆-Fe3O4-沸石复合材料对水中磷酸盐的吸附平衡数据可以采用Langmuir和Dubinin．Radushkevich（D—R）模型加以拟合，对水中铵的吸附平衡数据可以采用Langmuir、Freundlich和D—R模型加以拟合。准2级动力学模型可以用于描述锆．-Fe3O4-沸石复合材料对水中磷酸盐和铵的吸附动力学过程。锆-Fe3O4-沸石复合材料对水中磷酸盐的吸附是自发吸热过程。0．2mol／L的NaOH溶液可以使91％左右吸附到锆-Fe3O4-沸石复合材料上的磷酸盐解吸下来，0．2mol／L的NaCI溶液可以使92％左右吸附到锆-Fe3O4-沸石复合材料上的铵解吸下来。锆-Fe3O4-沸石复合材料对水中磷酸盐的吸附机制主要是配位体交换作用，对水中铵的吸附机制主要是阳离子交换作用。

英文摘要：

In this study, a novel zirconium/magnetite/zeolite composite （Zr/Fe3O4Zeo） was prepared and used as an adsorbent to remove phosphate and ammonium ffom aqueous solution. Theeffectofseveraloperatingparameterssuchasadsorbentdosage, solutionpH, initial adsorbate concentration, reaction time, and temperature on phosphate adsorption by Zr/Fe3O4Zeo was investigated using batch experiments. The effect of several operating parameters such as adsorbent dosage, initial adsorbate concentration and reaction time on ammonium adsorption by Zr/Fe3O4/Zeo was investigated using batch experiments. The phosphate adsorption capacity for Zr/Fe3O4/Zeo decreased with increasing solution pH. The equilibrium adsorption data of phosphate by Zr/Fe3O4/Zeocould be described by the Langmuir and Dubinin-Radushkevich （D-R） isotherm models. The equilibrium adsorption data of ammonium by Zr/Fe3O4/Zeo could be described by the Langmuir, Freundlich, and D-R isotherm models. The adsorption kinetic data of phosphate and ammonium by Zr/Fe3O4/Zeo well followed a pseudo-seennd-order model. The adsorption process of phosphate by Zr/Fe3O4/Zeo was endothermic and spontaneous in nature. The regeneration experiments showed that about 91% of phosphate adsorbed by Zr/Fe3OdZeo could be desorbed in 0.2 mol/L NaOH solution, and about 92% of ammonium adsorbed by Zr/Fe3O4/Zeo could be desorbed in 0.2 mol/L NaCl solution. Ligand exchange was the main mechanism for phosphate adsorption by Zr/Fe3O4/Zeo. Cation exchange was the main mechanism for ammonium adsorption by Zr/Fe3O4/Zeo.