【摘要】 通过化学沉淀法制备了磁性铁锰氧化物，并将其应用于模拟废水中磷的吸附，通过调控溶液pH值、反应温度、反应时间、离子强度、腐殖酸等参数，探究磁性铁锰氧化物对磷的吸附作用。吸附动力学和吸附等温线结果表明，准二级动力学模型和Freundlich等温线模型能较好地描述磷在磁性铁锰氧化物表面的吸附过程，磁性铁锰氧化物对磷的吸附主要以化学吸附为主，且为多层吸附。pH值对吸附实验结果的影响表明，弱酸性条件更有利于磁性铁锰氧化物对磷的吸附。离子强度实验结果表明，磁性铁锰氧化物对磷的吸附机理以内表面络合为主。FTIR分析结果表明，磁性铁锰氧化物表面富有含氧官能团，为磷的吸附提供丰富的活性位点。更多还原

【Abstract】 Magnetic iron manganese oxide was prepared by chemical precipitation method and applied to simulate the adsorption of phosphorus in wastewater. Its adsorption effect on phosphorus was investigated by adjusting the pH value of the solution, reaction temperature, reaction time, ion strength, humic acid and other parameters. The results of adsorption kinetics and adsorption isotherms indicate that the pseudo-second-order model and Freundlich isotherm model can better describe the adsorption process of phosphorus on the surface of magnetic iron manganese oxides, suggesting that the adsorption of phosphorus by magnetic iron manganese oxides is mainly chemical adsorption and multi-layer adsorption. The influence of pH value on the adsorption experiment results indicate that weak acidic conditions are more conducive to the adsorption of phosphorus on magnetic iron manganese oxides. The results of ion strength experiments indicate that the adsorption mechanism of phosphorus on magnetic iron manganese oxides is mainly surface complexation. The FTIR analysis results indicate that the surface of magnetic iron manganese oxide is rich in oxygen-containing functional groups, providing abundant active sites for phosphorus adsorption.更多还原