磁性Ce-La-MOFs@Fe3O4的除氟性能

doi:10.11896/cldb.22080185

材料导报

2024, Vol. 38

Issue (4): 22080185-7 https://doi.org/10.11896/cldb.22080185

无机非金属及其复合材料

磁性Ce-La-MOFs@Fe₃O₄的除氟性能

宋江燕^1,2, 翟涛², 温倩³, 周融融², 杨为森², 简绍菊², 潘文斌¹, 胡家朋^2,*

1 福州大学环境与安全工程学院,福州 350001
2 武夷学院生态与资源工程学院,福建省生态产业绿色技术重点实验室,福建武夷山 354300
3 武夷学院数学与计算机学院,福建武夷山 354300

Defluoridation Performance of Magnetic Ce-La-MOFs@Fe₃O₄

SONG Jiangyan^1,2, ZHAI Tao², WEN Qian³, ZHOU Rongrong², YANG Weisen², JIAN Shaoju², PAN Wenbin¹, HU Jiapeng^2,*

1 College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350001, China
2 Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, College of Ecological and Resources Engineering, Wuyi University, Wuyishan 354300, Fujian, China
3 College of Mathematics and Computer Science, Wuyi University, Wuyishan 354300, Fujian, China

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摘要通过水热法制备了Ce-La-MOFs@Fe₃O₄复合材料,研究了Ce-La-MOFs@Fe₃O₄对水溶液中F^-的吸附性能,并通过响应曲面法优化了吸附条件。实验结果表明:在pH=3.6、实验温度为40 ℃、初始氟离子浓度为17.4 mg/L的条件下,Ce-La-MOFs@Fe₃O₄的吸附效果最佳,F^-去除率可达94.5%。除氟特性实验数据更适合用Langmuir模型进行描述,拟合得到最大吸附容量(q_max)为147.23 mg/g,热力学参数ΔG^o、ΔH^o和ΔS^o表明该吸附反应是一个自发吸热的熵增过程。动力学研究表明Ce-La-MOFs@Fe₃O₄对F^-的吸附符合准二级反应动力学过程。对复合材料的形貌和结构进行了表征分析,并结合吸附热力学和动力学研究探讨了吸附机理,该吸附过程主要是离子交换和静电吸附共同作用。共存离子实验、循环再生实验结果显示,Ce-La-MOFs@Fe₃O₄对F^-具有较好的选择性,该复合材料的再生性能较好,回收率可达96%,两次循环后对F^-的去除率仍达81.74%。

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	宋江燕
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	周融融
	杨为森
	简绍菊
	潘文斌
	胡家朋

关键词: 磁性Ce-La-MOFs@Fe₃O₄ 除氟吸附响应曲面优化

Abstract: In the present work, Ce-La-MOFs@F₃O₄ composites were prepared via hydrothermal method, and the adsorption performance of Ce-La-MOFs@Fe₃O₄ on F^- in aqueous solution was investigated, and the adsorption conditions were optimized by response surface method. The experimental results show that the best adsorption effect of Ce-La-MOFs@Fe₃O₄ is achieved at pH=3.6, experimental temperature of 40 ℃, and initial fluoride ion concentration of 17.4 mg/L, and the F^- removal efficiency could reach 94.5%. The experimental datas of fluoride removal were more suitable to be described by Langmuir isotherm model, and the maximum adsorption capacity (q_max) is 147.23 mg/g. The thermodynamic parameters ΔG^o, ΔH^o and ΔS^o indicated that the adsorption reaction is anentropy-increasing process with spontaneous heat absorption, and kinetic study show that the adsorption of F^- by Ce-La-MOFs@Fe₃O₄is well fitted with the pseudo second order model. The morphology and structure of the composites were characterized and analyzed, and the adsorption mechanisms were explored in conjunction with the adsorption thermodynamic and kinetic studies, which were mainly a combination of ion-exchange action and electrostatic adsorption. The results of co-existing ion experiments and regeneration experiments show that Ce-La-MOFs@Fe₃O₄ has ahigh selectivity for F^-. And the regeneration perfor-mance of Ce-La-MOFs@Fe₃O₄ is so excellent that the recovery rate can reach 96%. After two cycles, the removal efficiency still reached 81.74% of F^-.

Key words: magnetic Ce-La-MOFs@Fe₃O₄ defluoridation adsorption response surface optimization

出版日期: 2024-02-25 发布日期: 2024-03-01

ZTFLH:

X52

基金资助: 国家自然科学基金(61903288);福建省自然科学基金(2019J01829;2019J01830);福建省教育厅项目(FBJG20210043);南平市科技项目(2022-ZXHZ-002;N2020Z015);武夷学院师生共创科研团队项目(2020-SSTD-05)

通讯作者: *胡家朋,博士,武夷学院生态与资源工程学院教授、硕士研究生导师。目前主要从事MOF材料制备及其吸附应用研究,近年来,在环境功能材料设计制备及应用领域发表论文80多篇,授权国家发明专利35项。wyuwqhjp@163.com

作者简介: 宋江燕,2021年毕业于天津城建大学,获得工学学士学位。现为福州大学环境与安全工程学院硕士研究生,在胡家朋教授和潘文斌教授的指导下进行研究。目前主要从事MOF材料的制备及除氟性能的研究。

引用本文:

宋江燕, 翟涛, 温倩, 周融融, 杨为森, 简绍菊, 潘文斌, 胡家朋. 磁性Ce-La-MOFs@Fe₃O₄的除氟性能[J]. 材料导报, 2024, 38(4): 22080185-7.
SONG Jiangyan, ZHAI Tao, WEN Qian, ZHOU Rongrong, YANG Weisen, JIAN Shaoju, PAN Wenbin, HU Jiapeng. Defluoridation Performance of Magnetic Ce-La-MOFs@Fe₃O₄. Materials Reports, 2024, 38(4): 22080185-7.

链接本文:

https://www.mater-rep.com/CN/10.11896/cldb.22080185 或 https://www.mater-rep.com/CN/Y2024/V38/I4/22080185

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