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
李梦雪 1谢明兴 1朱兰保 1王晶 1马莉 1潘争伟1
作者信息
- 1. 蚌埠学院环境科学实验中心,安徽蚌埠 233000
- 折叠
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.
Abstract
Magnetic iron manganese oxide was prepared by chemical precipitation method and applied to simulate the adsorption of phos-phorus in wastewater.Its adsorption effect on phosphorus was investigated by adjusting the pH value of the solution,reaction tempera-ture,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 sur-face of magnetic iron manganese oxides,suggesting that the adsorption of phosphorus by magnetic iron manganese oxides is mainly chem-ical adsorption and multi-layer adsorption.The influence of pH value on the adsorption experiment results indicate that weak acidic con-ditions are more conducive to the adsorption of phosphorus on magnetic iron manganese oxides.The results of ion strength experiments in-dicate that the adsorption mechanism of phosphorus on magnetic iron manganese oxides is mainly surface complexation.The FTIR analy-sis 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Key words
magnetic iron manganese oxide/phosphorus/adsorption mechanism/oxygen containing functional groups引用本文复制引用
基金项目
蚌埠学院自然科学研究重点项目(2023ZR04zd)
蚌埠学院产学研项目(2023340306001064)
安徽省大学生创新创业训练计划项目(S202311305110)
安徽省高校自然科学研究重点项目(2023AH052943)
安徽省高校自然科学研究重点项目(2023AH052942)
出版年
2024
NETL
NSTL
万方数据