磁性铁锰氧化物的制备及其对磷吸附性能的研究  

Preparation of Magnetic Iron Manganese Oxide and Its Phosphorus Adsorption Performance

作　　者：李梦雪 谢明兴 朱兰保[1] 王晶[1] 马莉[1] 潘争伟 LI Mengxue;XIE Mingxing;ZHU Lanbao;WANG Jing;MA Li;PAN Zhengwei(Experiment Centre of Environmental Science,Bengbu University,Bengbu 233000,China)

机构地区：[1]蚌埠学院环境科学实验中心,安徽蚌埠233000

出　　处：《长春师范大学学报》2024年第6期82-89,共8页Journal of Changchun Normal University

基　　金：蚌埠学院自然科学研究重点项目“磁性生物炭复合材料对废水重金属固定作用”(2023ZR04zd);蚌埠学院产学研项目“碳基新材料对水体重金属的固定作用”(2023340306001064);安徽省大学生创新创业训练计划项目“新型磁性铁锰氧化物/活性炭吸附染料废水性能研究”(S202311305110);安徽省高校自然科学研究重点项目“淮河流域典型持久性有机污染物的深度净化及机理研究”(2023AH052943);安徽省高校自然科学研究重点项目“淮河生态经济带资源协调分析及管理系统研究”(2023AH052942)。

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。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.

关 键 词：磁性铁锰氧化物 磷 吸附机理 含氧官能团 

分 类 号：X523[环境科学与工程—环境工程] O647.3[理学—物理化学]