化工进展 ›› 2023, Vol. 42 ›› Issue (5): 2724-2732.DOI: 10.16085/j.issn.1000-6613.2022-1230

• 资源与环境化工 • 上一篇    下一篇

蛋黄-壳介孔磁性炭微球的制备及其对红霉素的高效吸附

刘念(), 陈葵(), 武斌, 纪利俊, 吴艳阳, 韩金玲   

  1. 华东理工大学化工学院,上海 200237
  • 收稿日期:2022-07-01 修回日期:2022-09-05 出版日期:2023-05-10 发布日期:2023-06-02
  • 通讯作者: 陈葵
  • 作者简介:刘念(1997—),男,硕士研究生,研究方向为材料化工。E-mail:ecustliunian@163.com

Preparation of yolk-shell mesoporous magnetic carbon microspheres and its efficient adsorption of erythromycin

LIU Nian(), CHEN Kui(), WU Bin, JI Lijun, WU Yanyang, HAN Jinling   

  1. College of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2022-07-01 Revised:2022-09-05 Online:2023-05-10 Published:2023-06-02
  • Contact: CHEN Kui

摘要:

以溶剂热法制得的Fe3O4纳米颗粒为磁核,正硅酸四乙酯(TEOS)为造孔前体,间苯二酚-甲醛树脂(RF)为碳源,一步法制备蛋黄-壳介孔磁性炭微球(Fe3O4@C),并将其作为吸附剂用于去除水中的红霉素。采用TEM、XRD、FTIR、BET和VSM对Fe3O4@C进行表征。结果表明,Fe3O4@C核壳之间具有大空腔,比表面积为444m2/g,平均孔径为7.7nm,具有超顺磁性。通过静态吸附实验研究了Fe3O4@C对红霉素的吸附平衡和速率,并确定了优化的操作条件。结果表明,在吸附剂投加量为1.0g/L、初始红霉素浓度为300mg/L、pH为10的优化条件下,Fe3O4@C对红霉素的吸附量为210mg/g。Fe3O4@C对红霉素的吸附过程是自发的、吸热的和不可逆的,遵循准二级动力学和Langmuir等温线模型。经3次循环再生后,Fe3O4@C吸附量仍能维持在初始吸附量的86%以上。

关键词: 介孔, 磁性碳微球, 复合材料, 吸附, 红霉素, 分离

Abstract:

With Fe3O4 nanoparticles prepared by solvothermal method as magnetic cores, tetraethyl orthosilicate as the pore-forming precursor, and resorcinol-formaldehyde resin as the carbon source, yolk-shell mesoporous magnetic carbon microspheres (abbreviated as Fe3O4@C) were prepared by one-step method, and used as adsorbent to remove erythromycin from water. It was characterized by TEM, XRD, FTIR, BET and VSM. The results demonstrated that the prepared Fe3O4@C core-shell had a large cavity, with specific surface area of 444m2/g and average pore diameter of 7.7nm, and exhibits superparamagnetic properties. The adsorption equilibrium and rate of Fe3O4@C to erythromycin were studied by batch experiments, and the optimal operating conditions were determined. The results indicated that the adsorption capacity of Fe3O4@C for erythromycin was 210mg/g under the optimized conditions of adsorbent dosage of 1.0g/L, initial erythromycin concentration of 300mg/L and pH of 10. The adsorption process of Fe3O4@C to erythromycin was spontaneous, endothermic and irreversible, following pseudo-second-order kinetics and Langmuir isotherm models. After three cycles of regeneration, the adsorption capacity of Fe3O4@C still remained above 86% of the initial adsorption capacity.

Key words: mesoporous, magnetic carbon microspheres, composites, adsorption, erythromycin, separation

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