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磺酸基改性磁性吸附剂去除水中的Cu(II)

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王家宏, 雷思莉. 磺酸基改性磁性吸附剂去除水中的Cu(II)[J]. 环境化学, 2019, (8): 1785-1792. doi: 10.7524/j.issn.0254-6108.2018102603
引用本文: 王家宏, 雷思莉. 磺酸基改性磁性吸附剂去除水中的Cu(II)[J]. 环境化学, 2019, (8): 1785-1792. doi: 10.7524/j.issn.0254-6108.2018102603
shu
WANG Jiahong, LEI Sili. Removal of Cu(II) by sulfonic acid modified magnetic adsorbent[J]. Environmental Chemistry, 2019, (8): 1785-1792. doi: 10.7524/j.issn.0254-6108.2018102603
Citation: WANG Jiahong, LEI Sili. Removal of Cu(II) by sulfonic acid modified magnetic adsorbent[J]. Environmental Chemistry, 2019, (8): 1785-1792. doi: 10.7524/j.issn.0254-6108.2018102603
shu

磺酸基改性磁性吸附剂去除水中的Cu(II)

  • 陕西科技大学环境科学与工程学院, 西安, 710021

    • 通讯作者: 王家宏, E-mail: wangjiahong@sust.edu.cn ; 
  • 基金项目:

    国家自然科学基金（21677092），陕西省教育厅专项（15JK1095）和陕西省大学生创新创业项目（1315）资助.

Removal of Cu(II) by sulfonic acid modified magnetic adsorbent

  • School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China

    • Corresponding author: WANG Jiahong, wangjiahong@sust.edu.cn ; 
  • Fund Project: Supported by the National Natural Science Foundation of China (21677092), the Scientific Research Program Funded by Shaanxi Provincial Education Department (15JK1095) and Undergraduate Training Program for Innovation and Entrepreneurship of Shaanxi Province(1315).

  • 摘要: 利用水热法制备出Fe3O4磁性粒子，通过正硅酸乙酯水解使Fe3O4外面包覆SiO2（Fe3O4@SiO2），最后利用3-氨丙基三甲氧基硅烷和氯磺酸进行改性，合成了磺酸基改性磁性吸附剂.采用FT-IR、BET和XRD等方法对合成吸附剂进行表征，并探讨接触时间、初始浓度、溶液pH值等因素对吸附性能的影响.表征结果显示，成功合成了磺酸基改性磁性Fe3O4@SiO2粒子；Fe3O4@SO3Na比表面积为20.4587 m-2·g-1.吸附实验结果显示，在25℃条件下，Fe3O4@SO3Na对Cu2+的吸附等温线符合Freundlich吸附等温方程，实验条件下最大吸附量为16.13 mg·g-1.Fe3O4@SO3Na吸附Cu2+可在1 h内达到吸附平衡且吸附动力学遵循拟二级动力学模型.溶液中存在盐离子时，发现盐离子的存在对吸附效果几乎没有影响；溶液中含有柠檬酸时对吸附效果产生抑制.吸附剂经3次循环使用后仍有吸附性能，表明吸附剂具有良好的再生性和经济性.
    Abstract: The Fe3O4 magnetic particles were prepared by hydrothermal method, and its surface coating of SiO2 was by hydrolysis of ethyl orthosilicate. Finally, the sulfonic acid group-modified magnetic adsorbent was synthesized by modification of Fe3O4@SiO2 with 3-aminopropyltrimethoxysilane and chlorosulfonic acid. The magnetic adsorbent was characterized by FT-IR, BET and XRD. The effects of contact time, initial concentration, solution pH and other factors on the adsorption performance were investigated. The characterization results showed that the sulfonic acid-modified magnetic Fe3O4@SiO2 particles were successfully synthesized and the specific surface area of Fe3O4@SO3Na is 20.4587 m-2·g-1. The adsorption experiment results depicted that the Cu2+ adsorption Fe3O4@SO3Na was well fitted by Freundlich adsorption isotherm model. The maximum adsorption capacity under experimental conditions was 16.13 mg·g-1. Adsorption of Cu2+ reached adsorption equilibrium within 1 h and the adsorption kinetics followed a pseudo-second-order kinetic model. When salt ions were present in the solution, it was found that the presence of salt ions had no effect on the adsorption effect. Adsorption of Cu2+ on the adsorbent was inhibited in presence of citric acid. The adsorbent still had good adsorption performance after 3 regenerations which shows recyclability of the system to reduce associated cost.
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  • 收稿日期:  2018-10-26
王家宏, 雷思莉. 磺酸基改性磁性吸附剂去除水中的Cu(II)[J]. 环境化学, 2019, (8): 1785-1792. doi: 10.7524/j.issn.0254-6108.2018102603
引用本文: 王家宏, 雷思莉. 磺酸基改性磁性吸附剂去除水中的Cu(II)[J]. 环境化学, 2019, (8): 1785-1792. doi: 10.7524/j.issn.0254-6108.2018102603
shu
WANG Jiahong, LEI Sili. Removal of Cu(II) by sulfonic acid modified magnetic adsorbent[J]. Environmental Chemistry, 2019, (8): 1785-1792. doi: 10.7524/j.issn.0254-6108.2018102603
Citation: WANG Jiahong, LEI Sili. Removal of Cu(II) by sulfonic acid modified magnetic adsorbent[J]. Environmental Chemistry, 2019, (8): 1785-1792. doi: 10.7524/j.issn.0254-6108.2018102603
shu

磺酸基改性磁性吸附剂去除水中的Cu(II)

    通讯作者: 王家宏, E-mail: wangjiahong@sust.edu.cn ; 
  • 陕西科技大学环境科学与工程学院, 西安, 710021
  • 收稿日期:  2018-10-26
基金项目:

国家自然科学基金（21677092），陕西省教育厅专项（15JK1095）和陕西省大学生创新创业项目（1315）资助.

摘要: 利用水热法制备出Fe3O4磁性粒子，通过正硅酸乙酯水解使Fe3O4外面包覆SiO2（Fe3O4@SiO2），最后利用3-氨丙基三甲氧基硅烷和氯磺酸进行改性，合成了磺酸基改性磁性吸附剂.采用FT-IR、BET和XRD等方法对合成吸附剂进行表征，并探讨接触时间、初始浓度、溶液pH值等因素对吸附性能的影响.表征结果显示，成功合成了磺酸基改性磁性Fe3O4@SiO2粒子；Fe3O4@SO3Na比表面积为20.4587 m-2·g-1.吸附实验结果显示，在25℃条件下，Fe3O4@SO3Na对Cu2+的吸附等温线符合Freundlich吸附等温方程，实验条件下最大吸附量为16.13 mg·g-1.Fe3O4@SO3Na吸附Cu2+可在1 h内达到吸附平衡且吸附动力学遵循拟二级动力学模型.溶液中存在盐离子时，发现盐离子的存在对吸附效果几乎没有影响；溶液中含有柠檬酸时对吸附效果产生抑制.吸附剂经3次循环使用后仍有吸附性能，表明吸附剂具有良好的再生性和经济性.

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