铁有机骨架材料对偶氮型阴离子染料的吸附  

ADSORPTIVE PROPERTIES FOR AZO ANIONIC DYES ON IRON ORGANIC FRAMEWORK

作　　者：许倩倩 孙德帅[1] 亓雁飞 段良燕 李润浩 朱洪堂 XU Qian-qian;SUN De-shuai;QI Yan-fei;DUAN Liang-yan;LI Run-hao;ZHU Hong-tang(College of Chemical Science & Engineering, Qingdao University, Qingdao 266071 , China)

机构地区：[1]青岛大学化学化工学院,青岛266071

出　　处：《环境工程》2019年第3期98-103,共6页Environmental Engineering

基　　金：国家自然科学基金项目(21206080);山东省重点研发项目(2015GSF117026);山东省自然科学基金(ZR2017MB024)

摘　　要：金属有机骨架材料由于结构可调、可选择性吸附和可再生性等优点成为处理染料废水的新型材料。以常温下合成的铁有机骨架材料作为吸附剂,探索铁有机骨架材料对具有相似结构的阴离子染料吸附性能的影响。结果表明:在酸性条件下,铁有机骨架材料对染料的脱色率更高;并且材料对阴离子染料的吸附量随着染料初始浓度的增大而增大。Langmuir恒温吸附模型可以很好地描述吸附过程,计算得到的饱和吸附量随着染料分子截面积的增加而减小。对吸附机理进行探讨发现:Fe-BDC的电荷中心与阴离子染料之间的静电引力是吸附的主要作用力,染料分子中羟基、氨基等含有孤对电子的官能团与Fe-BDC中铁原子的相互作用也是吸附的重要作用力。Metal organic framework materials have been regarded as new absorbents for treating dye wastewater due to their controllable structure, selective adsorption and recyclable capacity. The iron-organic framework synthesized at room temperature was used as adsorbents to explore its effect on adsorption properties of anionic dyes with similar structure. The experimental findings showed that the iron organic framework had higher de-colorization for these dyes under acid condition.And the adsorption capacity increased with increase of the initial dye concentration. The adsorption process was well fitted with the Langmuir isotherms. The maximum adsorption capacity calculated from isotherm decreased with the increase of cross-sectional area of dye molecules. The electrostatic interaction between the charge center of Fe-BDC and the anionic dye was considered to be the main mechanism of adsorption. Finally,it was found that the interaction also existed between the hydroxyl,amidogen and functional groups with lone pair electrons in dye molecules and the iron atom in Fe-BDC. It also promoted the adsorption process significantly.

关 键 词：金属有机骨架材料 阴离子染料 吸附 吸附机理 作用力 

分 类 号：X703[环境科学与工程—环境工程]