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改性壳聚糖凝胶球对Cu(Ⅱ)的吸附

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刘珊, 赵春朋, 李涛, 冯婷, 刘丹荣, 张悦, 魏莉. 改性壳聚糖凝胶球对Cu(Ⅱ)的吸附[J]. 环境化学, 2020, (7): 2013-2021. doi: 10.7524/j.issn.0254-6108.2019051303
引用本文: 刘珊, 赵春朋, 李涛, 冯婷, 刘丹荣, 张悦, 魏莉. 改性壳聚糖凝胶球对Cu(Ⅱ)的吸附[J]. 环境化学, 2020, (7): 2013-2021. doi: 10.7524/j.issn.0254-6108.2019051303
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LIU Shan, ZHAO Chunpeng, LI Tao, FENG Ting, LIU Danrong, ZHANG Yue, WEI Li. Adsorption of Cu(Ⅱ) by modified chitosan gel ball[J]. Environmental Chemistry, 2020, (7): 2013-2021. doi: 10.7524/j.issn.0254-6108.2019051303
Citation: LIU Shan, ZHAO Chunpeng, LI Tao, FENG Ting, LIU Danrong, ZHANG Yue, WEI Li. Adsorption of Cu(Ⅱ) by modified chitosan gel ball[J]. Environmental Chemistry, 2020, (7): 2013-2021. doi: 10.7524/j.issn.0254-6108.2019051303
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改性壳聚糖凝胶球对Cu(Ⅱ)的吸附

  • 1. 长安大学水利与环境学院旱区地下水文与生态效应教育部重点实验室, 西安, 710054;

  • 2. 长江生态环保集团有限公司, 武汉, 430014

    • 通讯作者: 赵春朋, E-mail: 1375480861@qq.com ; 
  • 基金项目:

    国家自然科学基金（51778057）资助.

Adsorption of Cu(Ⅱ) by modified chitosan gel ball

  • 1. Key Laboratory of Underground Hydrology and Ecological Effects, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an, 710054, China;

  • 2. Yangtze River Ecological Protection Group Company of Limited Liability, Wuhan, 430014, China

    • Corresponding author: ZHAO Chunpeng, 1375480861@qq.com ; 
  • Fund Project: Supported by the National Natural Science Foundation of China (51778057).

  • 摘要: 以壳聚糖（CS）为母体负载纳米铁（NFeMs），并在聚乙二醇（PEG）交联作用下制备CS-NFeMs-PEG凝胶球，通过间歇批次试验探索该凝胶球在不同条件下对Cu（Ⅱ）吸附效果.CS-NFeMs-PEG凝胶球的最佳吸附pH值为5.5，吸附平衡时间20 h，吸附过程更符合拟二级吸附动力学模型；该吸附过程是自发、吸热、熵增过程；吸附等温线拟合得Cu（Ⅱ）的饱和吸附量为133.4 mg·g-1；红外图谱分析表明，CS成功负载NFeMs并与PEG交联生成复合物；扫描电镜表征说明，CS-NFeMs-PEG凝胶球内部呈三维网状结构.经5次脱附再生后吸附量保持在70 mg·g-1左右，材料具有较好的循环使用性.
    Abstract: CS-NFeMs-PEG gel spheres were prepared by using chitosan (CS) as parent-loaded Fe(NFeMs) and under crosslinking of PEG. By intermittent batch test to explore the gel ball under different conditions of Cu(Ⅱ) adsorption effect. The optimal adsorption pH of CS-NFeMs-PEG gel spheres was 5.5. The equilibrium time of adsorption was about 20 h and the adsorption process was more consistent with the quasi-second-order dynamic model. The adsorption process was spontaneous, endothermic and entropy increasing. According to the adsorption isotherm fitting, saturated adsorption capacity of Cu(Ⅱ) was 133.4 mg·g-1. Infrared spectrum analysis showed that CS loaded NFeMs and reacted with PEG form complex substance. Scanning electron microscopy analysis showed that CS-PEG-NFeMs had three-dimensional network structure inside.After 5 times of desorption regeneration, the adsorption capacity remained about 70 mg·g-1and the material had good recycling property.
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  • 收稿日期:  2019-05-13

改性壳聚糖凝胶球对Cu(Ⅱ)的吸附

    通讯作者: 赵春朋, E-mail: 1375480861@qq.com ; 
  • 1. 长安大学水利与环境学院旱区地下水文与生态效应教育部重点实验室, 西安, 710054;
  • 2. 长江生态环保集团有限公司, 武汉, 430014
  • 收稿日期:  2019-05-13
基金项目:

国家自然科学基金（51778057）资助.

摘要: 以壳聚糖（CS）为母体负载纳米铁（NFeMs），并在聚乙二醇（PEG）交联作用下制备CS-NFeMs-PEG凝胶球，通过间歇批次试验探索该凝胶球在不同条件下对Cu（Ⅱ）吸附效果.CS-NFeMs-PEG凝胶球的最佳吸附pH值为5.5，吸附平衡时间20 h，吸附过程更符合拟二级吸附动力学模型；该吸附过程是自发、吸热、熵增过程；吸附等温线拟合得Cu（Ⅱ）的饱和吸附量为133.4 mg·g-1；红外图谱分析表明，CS成功负载NFeMs并与PEG交联生成复合物；扫描电镜表征说明，CS-NFeMs-PEG凝胶球内部呈三维网状结构.经5次脱附再生后吸附量保持在70 mg·g-1左右，材料具有较好的循环使用性.

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