MIL-53(Fe)复合材料对废水中双氯芬酸钠的吸附*

doi:10.7523/j.ucas.2023.085

摘要/Abstract

摘要： 用溶剂热法制备了Fe-MOF材料MIL-53 (Fe)和MIL-53 (Fe)-10FA,研究了两种材料吸附水溶液中双氯芬酸钠（DCF）的性能。两种MOF材料对DCF的吸附行为都遵循准二级动力学模型,吸附过程属于化学吸附。吸附平衡等温线符合Langmuir等温吸附模型,为单分子层吸附。甲酸改性后的MIL-53 (Fe)-10FA与MIL-53 (Fe)相比,表面形态结构发生变化,晶体尺寸变大,孔径、比表面积和总孔容增加,含氧官能团含量增加,对DCF的吸附性能优异,Langmuir等温线拟合的最大吸附量为652.29 mg/g,吸附机理主要包括氢键作用和苯环与苯环之间π-π堆积作用。

关键词: 吸附, MIL-53(Fe), 改性, 双氯芬酸钠

Abstract: Fe-MOF materials MIL-53 (Fe) and MIL-53 (Fe)-10FA were prepared by solvothermal method, and their adsorption properties for diclofenac sodium (DCF) in aqueous solution were investigated. The adsorption behavior of the two MOF materials to DCF follows the pseudo-second-order kinetic model, and the adsorption process belongs to chemical adsorption. The adsorption equilibrium isotherm conforms to the Langmuir adsorption isotherm model and is monolayer adsorption. The surface morphology of MIL -53 (Fe)-10FA modified by formic acid was different from that of MIL-53 (Fe). The crystal size was larger than that of MIL-53(Fe). The pore size, specific surface area and total pore volume increased after modified. The content of oxygen-containing functional groups also increased. The adsorption capacity of MIL-53 (Fe)-10FA for DCF was significant, and the maximum adsorption capacity of Langmuir isotherm fitting was 652.29 mg/g. The adsorption mechanism mainly includes hydrogen bonding and π-π stacking between benzene rings and benzene rings.

Key words: adsorption, MIL-53 (Fe), modification, diclofenac sodium

中图分类号:

X703

蔡艳荣, 李雪妍, 蒋伟丽, 王琼, 常春. MIL-53(Fe)复合材料对废水中双氯芬酸钠的吸附^*[J]. 中国科学院大学学报, DOI: 10.7523/j.ucas.2023.085.

CAI Yanrong, LI Xueyan, JIANG Weili, WANG Qiong, CHANG Chun. Adsorption of diclofenac sodium from wastewater by MIL-53(Fe) composite materials[J]. Journal of University of Chinese Academy of Sciences, DOI: 10.7523/j.ucas.2023.085.

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MIL-53(Fe)复合材料对废水中双氯芬酸钠的吸附^*

Adsorption of diclofenac sodium from wastewater by MIL-53(Fe) composite materials

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