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Fe3O4@SA/Ce微球的表征及对染料的吸附特性

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陈晨, 李北罡. Fe3O4@SA/Ce微球的表征及对染料的吸附特性[J]. 环境化学, 2021, (3): 799-807. doi: 10.7524/j.issn.0254-6108.2019102601
引用本文: 陈晨, 李北罡. Fe3O4@SA/Ce微球的表征及对染料的吸附特性[J]. 环境化学, 2021, (3): 799-807. doi: 10.7524/j.issn.0254-6108.2019102601
shu
CHEN Chen, LI Beigang. Characterization of Fe3O4@SA/Ce microspheres and their adsorption characteristics for direct dyes[J]. Environmental Chemistry, 2021, (3): 799-807. doi: 10.7524/j.issn.0254-6108.2019102601
Citation: CHEN Chen, LI Beigang. Characterization of Fe3O4@SA/Ce microspheres and their adsorption characteristics for direct dyes[J]. Environmental Chemistry, 2021, (3): 799-807. doi: 10.7524/j.issn.0254-6108.2019102601
shu

Fe3O4@SA/Ce微球的表征及对染料的吸附特性

  • 内蒙古师范大学化学与环境科学学院, 内蒙古自治区环境化学重点实验室, 呼和浩特, 010022

    • 通讯作者: 李北罡, E-mail: libg@imnu.edu.cn
  • 基金项目:

    国家自然科学基金（21167011），内蒙古自治区自然科学基金（2020LH02009）和内蒙古师范大学自主研发项目（112129K18ZZYF006）资助.

Characterization of Fe3O4@SA/Ce microspheres and their adsorption characteristics for direct dyes

  • Institute of Chemistry and Environmental Sciences of Inner Mongolia Normal University, Key Laboratory of Environmental Chemistry in Inner Mongolia Autonomous Region, Hohhot, 010022, China

    • Corresponding author: LI Beigang, libg@imnu.edu.cn
  • Fund Project: Supported by National Natural Science Foundation of China(21167011), Natural Science Foundation of Inner Mongolia Autonomous Region (2020LH02009) and Inner Mongolia Normal University Independent Research and Development Project (112129K18ZZYF006).

  • 摘要: 以天然高分子化合物海藻酸钠（sodium alginate，SA）为骨架，结合磁性Fe3O4和稀土铈离子Ce（Ⅲ）通过溶液反应制备出一种新型的磁性海藻酸铈复合微球（Fe3O4@SA/Ce）.采用X射线衍射（XRD）、孔结构比表面积分析（BET）、扫描电子显微镜（SEM）、红外光谱（FT-IR）及振动样品强磁计（VSM）对Fe3O4@SA/Ce的结构进行了表征，并以直接桃红12B（direct red 12B，DR 12B）和直接橙S（direct orange S，DO S）两种染料为吸附对象，探讨了Fe3O4@SA/Ce的吸附剂性能、吸附动力学和热力学.结果表明，Fe3O4@SA/Ce对室温下自然pH染料溶液中DR 12B和DO S均表现出良好的吸附效果，吸附量分别可达464 mg·g-1和730 mg·g-1.在不同温度下（298、313、328 K），Fe3O4@SA/Ce对DR 12B和DO S的吸附过程均可用拟二级吸附动力学方程准确描述.通过等温吸附研究，发现Fe3O4@SA/Ce对两种染料的等温吸附较好地符合Freundlich模型.各种表征结果表明，SA与Ce（Ⅲ）和Fe3O4交联反应后生成的Fe3O4@SA/Ce凝胶球表面有大量深浅不一的褶皱沟纹，形貌发生了显著变化.作为一种绿色环保、制备方法简单、可高效吸附的磁性高分子复合吸附剂，Fe3O4@SA/Ce对高浓度染料具有很好的吸附效果，期望能够在染料废水处理中得到广泛应用.
    Abstract: A new type of magnetic composite microspheres (Fe3O4@SA/Ce) was prepared by a solution method with natural polymer sodium alginate (SA), magnetic Fe3O4 and rare earth cerium ion Ce (Ⅲ). Fe3O4@SA/Ce was characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FT-IR) and vibrating sample magnetometry (VSM). The adsorption properties, adsorption kinetics and thermodynamics of direct red 12B (DR 12B) and direct orange S (DO S) were investigated in detail. The results showed that Fe3O4@SA/Ce had good adsorbing effect on DR 12B and DO S in natural pH dye solution at room temperature, and the adsorption capacity reached 464 mg·g-1and 730 mg·g-1, respectively. The adsorption process of the Fe3O4@SA/Ce for DR 12B and DO S could be described by a pseudo-second-order adsorption kinetic equation at different temperatures (298, 313 and 328 K). It was found that the isothermal adsorption of Fe3O4@SA/Ce for the two dyes was in accordance with the Freundlich model. The morphology of the Fe3O4@SA/Ce gel changed significantly, and the surface showed a large number of folds and different depth grooves after the cross-linking reaction of SA with Ce (Ⅲ) and Fe3O4. Fe3O4@SA/Ce is a new type of magnetic polymer gel ball adsorbents with a simple fabrication process and high efficiency adsorption,and could be used as a feasible adsorbent for the treatment of high concentration dye wastewater.
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  • 收稿日期:  2019-10-26
陈晨, 李北罡. Fe3O4@SA/Ce微球的表征及对染料的吸附特性[J]. 环境化学, 2021, (3): 799-807. doi: 10.7524/j.issn.0254-6108.2019102601
引用本文: 陈晨, 李北罡. Fe3O4@SA/Ce微球的表征及对染料的吸附特性[J]. 环境化学, 2021, (3): 799-807. doi: 10.7524/j.issn.0254-6108.2019102601
shu
CHEN Chen, LI Beigang. Characterization of Fe3O4@SA/Ce microspheres and their adsorption characteristics for direct dyes[J]. Environmental Chemistry, 2021, (3): 799-807. doi: 10.7524/j.issn.0254-6108.2019102601
Citation: CHEN Chen, LI Beigang. Characterization of Fe3O4@SA/Ce microspheres and their adsorption characteristics for direct dyes[J]. Environmental Chemistry, 2021, (3): 799-807. doi: 10.7524/j.issn.0254-6108.2019102601
shu

Fe3O4@SA/Ce微球的表征及对染料的吸附特性

    通讯作者: 李北罡, E-mail: libg@imnu.edu.cn
  • 内蒙古师范大学化学与环境科学学院, 内蒙古自治区环境化学重点实验室, 呼和浩特, 010022
  • 收稿日期:  2019-10-26
基金项目:

国家自然科学基金（21167011），内蒙古自治区自然科学基金（2020LH02009）和内蒙古师范大学自主研发项目（112129K18ZZYF006）资助.

摘要: 以天然高分子化合物海藻酸钠（sodium alginate，SA）为骨架，结合磁性Fe3O4和稀土铈离子Ce（Ⅲ）通过溶液反应制备出一种新型的磁性海藻酸铈复合微球（Fe3O4@SA/Ce）.采用X射线衍射（XRD）、孔结构比表面积分析（BET）、扫描电子显微镜（SEM）、红外光谱（FT-IR）及振动样品强磁计（VSM）对Fe3O4@SA/Ce的结构进行了表征，并以直接桃红12B（direct red 12B，DR 12B）和直接橙S（direct orange S，DO S）两种染料为吸附对象，探讨了Fe3O4@SA/Ce的吸附剂性能、吸附动力学和热力学.结果表明，Fe3O4@SA/Ce对室温下自然pH染料溶液中DR 12B和DO S均表现出良好的吸附效果，吸附量分别可达464 mg·g-1和730 mg·g-1.在不同温度下（298、313、328 K），Fe3O4@SA/Ce对DR 12B和DO S的吸附过程均可用拟二级吸附动力学方程准确描述.通过等温吸附研究，发现Fe3O4@SA/Ce对两种染料的等温吸附较好地符合Freundlich模型.各种表征结果表明，SA与Ce（Ⅲ）和Fe3O4交联反应后生成的Fe3O4@SA/Ce凝胶球表面有大量深浅不一的褶皱沟纹，形貌发生了显著变化.作为一种绿色环保、制备方法简单、可高效吸附的磁性高分子复合吸附剂，Fe3O4@SA/Ce对高浓度染料具有很好的吸附效果，期望能够在染料废水处理中得到广泛应用.

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