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庞达, 王崇臣, 王鹏, 付会芬, 赵晨. ZIF-67高效吸附去除水中的洛克沙胂[J]. 环境化学, 2020, (6): 1451-1463. doi: 10.7524/j.issn.0254-6108.2020021804
引用本文: 庞达, 王崇臣, 王鹏, 付会芬, 赵晨. ZIF-67高效吸附去除水中的洛克沙胂[J]. 环境化学, 2020, (6): 1451-1463. doi: 10.7524/j.issn.0254-6108.2020021804
shu
PANG Da, WANG Chongchen, WANG Peng, FU Huifen, ZHAO Chen. Efficiently adsorptive removal towards roxarsone with ZIF-67[J]. Environmental Chemistry, 2020, (6): 1451-1463. doi: 10.7524/j.issn.0254-6108.2020021804
Citation: PANG Da, WANG Chongchen, WANG Peng, FU Huifen, ZHAO Chen. Efficiently adsorptive removal towards roxarsone with ZIF-67[J]. Environmental Chemistry, 2020, (6): 1451-1463. doi: 10.7524/j.issn.0254-6108.2020021804
shu

ZIF-67高效吸附去除水中的洛克沙胂

  • 北京建筑大学建筑结构与环境修复功能材料北京市重点实验室, 北京, 100044

  • 基金项目:

    国家自然科学基金（51878023）和北京市优秀人才项目（2019A22）资助.

Efficiently adsorptive removal towards roxarsone with ZIF-67

  • Key Laboratory of Functional Materials for Building Structure and Environment Remediation, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China

  • Fund Project: Supported by the National Natural Science Foundation of China(51878023) and Beijing Talent Project(2019A22).

  • 摘要: 作为一类很有应用前景的金属有机骨架材料（MOFs），沸石咪唑酯骨架（ZIFs）由于具有比表面积大、孔隙可调、易于实现内外位点功能化等优点，广泛受到人们的关注.作为ZIFs材料的一种，具有上述特点的沸石咪唑酯骨架-67（ZIF-67）由Co2+离子和2-甲基咪唑通过配位及自组装形成.ZIF-67拥有高度稳定的结构，在吸附、分子分离、传感、催化等领域有着广泛的应用.本研究利用一种环境友好型的方法合成了ZIF-67，并用来吸附去除水中的洛克沙胂.探究了吸附过程中的吸附动力学、吸附热力学行为和吸附机理.实验结果表明，ZIF-67对水中的洛克沙胂具有优良的吸附性能，在pH=6时最大吸附量可以达到172.45 mg·g-1，吸附动力学与热力学行为分别符合准二级动力学和Langmuir吸附等温模型.ZIF-67对洛克沙胂的吸附机理可能是静电吸附和离子交换作用.通过固定床小柱实验表明ZIF-67具有很好的实际应用性能.
    Abstract: As a promising family of metal-organic frameworks (MOFs), zeolitic imidazolate frameworks (ZIFs) draw increasing attention due to their outstanding properties including high surface area, tunable porosity, easily realized functionalization on both internal and external sites. As one of the ZIFs, Zeolitic imidazolate frameworks-67 (ZIF-67) with the above characteristics is composed of metal ions (Co2+) and 2-methylimidazole linkers. With a highly stable structure, ZIF-67 have been used in several application fields, such as adsorption, separation, sensing, catalysis and so on. In this study, ZIF-67 was prepared by using an eco-friendly method, which was further used to carry out the adsorptive removal of roxarsone from simulated wastewater. The adsorption kinetics, adsorption isotherm and possible adsorption mechanism were investigated. The results revealed that ZIF-67 exhibited good adsorption performance towards roxarsone, with maximum uptake capacity being 172.45 mg·g-1 at pH=6. The adsorption kinetics and isotherm behaviors were well fitted with pseudo-second-order kinetic model and Langmuir model, respectively. The possible adsorption mechanism of ZIF-67 towards roxarsone was proposed, in which the electrostatic interaction and ion-exchange contributed the efficient adsorption activity. Finally, the fixed-bed column experiments implied that ZIF-67 could be potentially applied to achieve large-scale roxarsone removal from the real polluted water.
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  • 收稿日期:  2020-02-18
庞达, 王崇臣, 王鹏, 付会芬, 赵晨. ZIF-67高效吸附去除水中的洛克沙胂[J]. 环境化学, 2020, (6): 1451-1463. doi: 10.7524/j.issn.0254-6108.2020021804
引用本文: 庞达, 王崇臣, 王鹏, 付会芬, 赵晨. ZIF-67高效吸附去除水中的洛克沙胂[J]. 环境化学, 2020, (6): 1451-1463. doi: 10.7524/j.issn.0254-6108.2020021804
shu
PANG Da, WANG Chongchen, WANG Peng, FU Huifen, ZHAO Chen. Efficiently adsorptive removal towards roxarsone with ZIF-67[J]. Environmental Chemistry, 2020, (6): 1451-1463. doi: 10.7524/j.issn.0254-6108.2020021804
Citation: PANG Da, WANG Chongchen, WANG Peng, FU Huifen, ZHAO Chen. Efficiently adsorptive removal towards roxarsone with ZIF-67[J]. Environmental Chemistry, 2020, (6): 1451-1463. doi: 10.7524/j.issn.0254-6108.2020021804
shu

ZIF-67高效吸附去除水中的洛克沙胂

  • 北京建筑大学建筑结构与环境修复功能材料北京市重点实验室, 北京, 100044
  • 收稿日期:  2020-02-18
基金项目:

国家自然科学基金（51878023）和北京市优秀人才项目（2019A22）资助.

摘要: 作为一类很有应用前景的金属有机骨架材料（MOFs），沸石咪唑酯骨架（ZIFs）由于具有比表面积大、孔隙可调、易于实现内外位点功能化等优点，广泛受到人们的关注.作为ZIFs材料的一种，具有上述特点的沸石咪唑酯骨架-67（ZIF-67）由Co2+离子和2-甲基咪唑通过配位及自组装形成.ZIF-67拥有高度稳定的结构，在吸附、分子分离、传感、催化等领域有着广泛的应用.本研究利用一种环境友好型的方法合成了ZIF-67，并用来吸附去除水中的洛克沙胂.探究了吸附过程中的吸附动力学、吸附热力学行为和吸附机理.实验结果表明，ZIF-67对水中的洛克沙胂具有优良的吸附性能，在pH=6时最大吸附量可以达到172.45 mg·g-1，吸附动力学与热力学行为分别符合准二级动力学和Langmuir吸附等温模型.ZIF-67对洛克沙胂的吸附机理可能是静电吸附和离子交换作用.通过固定床小柱实验表明ZIF-67具有很好的实际应用性能.

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