磁性金属有机骨架材料吸附分离靛蓝二磺酸钠  

Adsorption and Removal of Indigo Carmine by Magnetic Metal Organic Framework Materials

作　　者：吴晨 刘涛 陈立钢[1] 丁杰[2] 

机构地区：[1]东北林业大学理学院,黑龙江哈尔滨150040 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《环境科学与技术》2017年第10期43-48,共6页Environmental Science & Technology

基　　金：哈尔滨工业大学城市水资源与水环境国家重点实验室开放基金项目(ES201607)

摘　　要：通过两步水热法合成了Fe_3O_4@NH_2-MOF(Al)磁性纳米复合材料,采用透射电子显微镜、磁性能分析表征手段对合成样品的形貌以及磁性进行了表征。应用其对靛蓝二磺酸钠染料进行吸附,考察了离子强度、pH值、吸附等温线,吸附动力学和吸附热力学的影响。利用再生性这一特征,用不同洗脱剂进行脱附和再利用。试验结果表明,该材料为纳米级,且具备磁性纳米材料优良的物理和化学性质。该材料具有超顺磁性,在外加磁场的作用下可以实现快速分离。动力学试验研究证明吸附过程符合二级动力学拟合模型,吸附为放热过程,并且是自发进行的。对该材料进行了再生性能考察证明,Fe_3O_4@NH_2-MOF(Al)不仅具有较高的吸附能力,而且可以实现重复利用。The Fe3O4@NH2-MOF（Al）magnetic nano-particles were synthesized by two steps of hydrothermal method. The materials＇ morphology and property of magnetism were characterized by transmission electron microscope and magnetic analysis. Adsorptive removal of indigo carmine by the MOF（Al） magnetic nano-particles was studied in view of ionic strength,p H,adsorption isotherm,kinetics and thermodynamics. Depending on the regeneration characteristics of magnetic materials,the magnetic MOF（Al） was washed by different eluents and reuse. Results show that the materials are nano-particles,with excellent physical and chemical properties. They have superparamagnetism and could be separated quickly from aqueous medium via external magnetic field. The experiement data demonstrated that the adsorption mechanism follows the pseudo-second-order model. Moreover,the adsorption process is exothermic and spontaneous. The study on possibility of regeneration shows that the Fe3O4@NH2-MOF（Al）not only has higher adsorption capacity,it can also be recycled after used.

关 键 词：磁性 纳米材料 染料 吸附 重复使用 

分 类 号：X703[环境科学与工程—环境工程]