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锆负载量对锆镁改性膨润土吸附水中磷酸盐的影响

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何思琪, 张宏华, 林建伟, 詹艳慧, 田弘, 刘鹏茜, 林莹, 俞阳, 吴小龙, 赵钰颖, 王艳. 锆负载量对锆镁改性膨润土吸附水中磷酸盐的影响[J]. 环境化学, 2019, 38(4): 922-934. doi: 10.7524/j.issn.0254-6108.2018053006
引用本文: 何思琪, 张宏华, 林建伟, 詹艳慧, 田弘, 刘鹏茜, 林莹, 俞阳, 吴小龙, 赵钰颖, 王艳. 锆负载量对锆镁改性膨润土吸附水中磷酸盐的影响[J]. 环境化学, 2019, 38(4): 922-934. doi: 10.7524/j.issn.0254-6108.2018053006
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HE Siqi, ZHANG Honghua, LIN Jianwei, ZHAN Yanhui, TIAN Hong, LIU Pengxi, LIN Ying, YU Yang, WU Xiaolong, ZHAO Yuying, WANG Yan. Effect of zirconium loading on phosphate adsorption onto zirconium/magnesium-modified bentonite[J]. Environmental Chemistry, 2019, 38(4): 922-934. doi: 10.7524/j.issn.0254-6108.2018053006
Citation: HE Siqi, ZHANG Honghua, LIN Jianwei, ZHAN Yanhui, TIAN Hong, LIU Pengxi, LIN Ying, YU Yang, WU Xiaolong, ZHAO Yuying, WANG Yan. Effect of zirconium loading on phosphate adsorption onto zirconium/magnesium-modified bentonite[J]. Environmental Chemistry, 2019, 38(4): 922-934. doi: 10.7524/j.issn.0254-6108.2018053006
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锆负载量对锆镁改性膨润土吸附水中磷酸盐的影响

  • 1.

    上海海洋大学海洋生态与环境学院, 上海, 201306;

  • 2.

    浙江工业大学环境学院, 杭州, 310032

  • 基金项目:

    国家自然科学基金（51408354，50908142），上海市自然科学基金（15ZR1420700），上海市大学生创新项目和上海海洋大学优秀本科生进实验室项目资助.

Effect of zirconium loading on phosphate adsorption onto zirconium/magnesium-modified bentonite

  • 1.

    College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai, 201306, China;

  • 2.

    College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China

  • Fund Project: Supported by the National Natural Science Foundation of China (51408354,50908142),the Natural Science Foundation of Shanghai (15ZR1420700),the College Student Innovation Project of Shanghai and the Project of Shanghai Ocean University Outstanding Undergraduate Entering the Laboratory.

  • 摘要: 制备了锆氧化物（ZrO2）含量分别为2.98%、7.81%、13.73%和33.70%的4种锆镁改性膨润土，并考察了锆负载量对锆镁改性膨润土吸附水中磷酸盐的影响.结果表明，较高的吸附剂投加量有利于水中磷酸盐被锆镁改性膨润土所吸附去除.锆镁改性膨润土吸附水中磷酸盐的动力学过程符合准二级动力学模型.锆镁改性膨润土对水中磷酸盐的吸附等温行为可以采用Langmuir、Freundlich和Dubinin-Redushckevich （D-R）等温吸附模型进行描述.增加溶液pH值不会导致锆镁改性膨润土对水中磷酸盐吸附能力的下降.锆镁改性膨润土对水中磷酸盐的吸附能力随其锆含量的增加而增加.但是，从总体上，锆镁改性膨润土中单位质量ZrO2对水中磷酸盐的最大吸附量则随其锆含量的增加而降低.研究结果说明，锆镁改性膨润土适合作为一种吸附剂去除水中的磷酸盐，较高的锆负载量有利于增强锆镁改性膨润土吸附水中磷酸盐的能力，而较低的锆负载量则有利于提高锆镁改性膨润土中单位质量ZrO2对水中磷酸盐的吸附能力.
    Abstract: To investigate the influence of zirconium loading on the adsorption of phosphate from aqueous solution on zirconium/magnesium-modified bentonite (ZrMgBT), a series of ZrMgBTs with different levels of zirconium loading were prepared and characterized. Their adsorption properties for phosphate were then comparatively investigated in batch mode in this study. Results showed that high adsorbent dosage was beneficial for the removal of phosphate from water by ZrMgBT. Adsorption kinetics was well fitted by the pseudo-second-order model. The Langmuir, Freundlich and Dubinin-Redushckevich (D-R) isotherm models could be suitably applied to fit the adsorption equilibrium data of phosphate on ZrMgBT. In general, an increase in solution pH from 4 to 9 did not result in the suppression of phosphate removal by ZrMgBT. The phosphate adsorption capacity and initial adsorption rate for ZrMgBT increased with an increase in its zirconium loading amount. However, the ZrO2 content-normalized Qmax for ZrMgBT generally decreased with an increase in its zirconium loading. Results of this work indicate that ZrMgBT is a very promising adsorbent material for phosphate removal from water. The ZrMgBT with a higher zirconium loading amount exhibits a higher phosphate adsorption capacity, while the decrease in the zirconium loading amount of ZrMgBT can increase the utilization efficiency of ZrO2 for phosphate adsorption.
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  • 收稿日期:  2018-05-30
  • 刊出日期:  2019-04-15

锆负载量对锆镁改性膨润土吸附水中磷酸盐的影响

  • 1.  上海海洋大学海洋生态与环境学院, 上海, 201306;
  • 2.  浙江工业大学环境学院, 杭州, 310032
  • 收稿日期:  2018-05-30
基金项目:

国家自然科学基金（51408354，50908142），上海市自然科学基金（15ZR1420700），上海市大学生创新项目和上海海洋大学优秀本科生进实验室项目资助.

摘要: 制备了锆氧化物（ZrO2）含量分别为2.98%、7.81%、13.73%和33.70%的4种锆镁改性膨润土，并考察了锆负载量对锆镁改性膨润土吸附水中磷酸盐的影响.结果表明，较高的吸附剂投加量有利于水中磷酸盐被锆镁改性膨润土所吸附去除.锆镁改性膨润土吸附水中磷酸盐的动力学过程符合准二级动力学模型.锆镁改性膨润土对水中磷酸盐的吸附等温行为可以采用Langmuir、Freundlich和Dubinin-Redushckevich （D-R）等温吸附模型进行描述.增加溶液pH值不会导致锆镁改性膨润土对水中磷酸盐吸附能力的下降.锆镁改性膨润土对水中磷酸盐的吸附能力随其锆含量的增加而增加.但是，从总体上，锆镁改性膨润土中单位质量ZrO2对水中磷酸盐的最大吸附量则随其锆含量的增加而降低.研究结果说明，锆镁改性膨润土适合作为一种吸附剂去除水中的磷酸盐，较高的锆负载量有利于增强锆镁改性膨润土吸附水中磷酸盐的能力，而较低的锆负载量则有利于提高锆镁改性膨润土中单位质量ZrO2对水中磷酸盐的吸附能力.

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