工业水处理 ›› 2024, Vol. 44 ›› Issue (2): 73-78. doi: 10.19965/j.cnki.iwt.2023-0105

• 试验研究 • 上一篇    下一篇

钇锆双金属MOFs对有机膦阻垢剂HEDP的吸附研究

刘登科1,2(), 杨庆峰1(), 刘阳桥3   

  1. 1. 中国科学院上海高等研究院绿色化学工程技术研究与发展中心, 上海 201210
    2. 中国科学院大学, 北京 100049
    3. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:2023-10-12 出版日期:2024-02-20 发布日期:2024-03-14
  • 作者简介:

    刘登科(1998— ),硕士。电话:18800255818,E-mail:

    杨庆峰,研究员,博士生导师。电话:13816776094,E-mail:

  • 基金资助:
    国家自然科学基金项目(51878647)

Adsorption of yttrium /zirconium bimetallic organic frameworks on organic phosphonate scale inhibitor HEDP

Dengke LIU1,2(), Qingfeng YANG1(), Yangqiao LIU3   

  1. 1. Center for Green Chemical Engineering Technology Research and Development,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China
    2. University of Chinese Academy of Sciences,Beijing 100049,China
    3. Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China
  • Received:2023-10-12 Online:2024-02-20 Published:2024-03-14

摘要:

采用溶剂热法首次合成了新型钇锆双金属有机框架(YZr-MOF)吸附材料,并对其结构和表面性质进行了表征,研究了YZr-MOF对有机膦阻垢剂羟基亚乙基二膦酸(HEDP)的吸附行为和性质。实验结果表明,YZr-MOF呈现出大小均匀的球形颗粒结构,比表面积为912.862 m2/g;在298 K时,YZr-MOF理论最大吸附量为66.293 mg/g(以P计)。吸附过程符合准二级动力学和Langmuir模型,吸附过程为吸热过程,温度升高有利于YZr-MOF吸附HEDP。在吸附实验中,YZr-MOF的最佳质量浓度为0.2 g/L;YZr-MOF在较宽的pH范围内有着良好的稳定性,并且经过6次循环后,仍保持显著的吸附率。结合相关实验和FTIR、XPS的表征结果表明,静电作用和配体交换为主要吸附机理。

关键词: 金属有机框架, 有机膦阻垢剂, 吸附, 配体交换

Abstract:

A new yttrium zirconium bimetallic organic framework(YZr-MOF) adsorption material was synthesized by solvothermal method for the first time,and the structure and surface properties of adsorbents were characterized. Adsorption behavior and properties on organic phosphonate scale inhibitor 1-hydroxyethylidene-1,1-diphosphonic acid(HEDP) were investigated. Experimental results indicated that the structure of MOFs presented spherical particles of uniform size. The specific surface area of the adsorbent was 912.862 m2/g. At 298 K,the theoretical maximum adsorption capacity of YZr-MOF was 66.293 mg/g(calculated in P). The adsorption process was fitted well with the pseudo-second-order kinetics equation and the Langmuir model. Moreover,the adsorption process was an endothermic process. The temperature rise was conducive to YZr-MOF adsorption of HEDP. In the adsorption experiments,the optimal amount of YZr-MOF was 0.2 g/L. YZr-MOF had good stability over a wide pH range and maintained a significant adsorption rate after six cycles. Combined with the relevant experiments and the characterization results of FTIR and XPS,electrostatic interaction and ligand exchange were the main adsorption mechanisms.

Key words: metal organic framework, organic phosphonate scale inhibitor, adsorption, ligand exchange

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