Preparation of ethanedithiol modified Cu-MOFs and its adsorption performance for mercury

WEI Jinzhi; ZHANG Shaoping; WANG Xueliang; SUN Xiaojun; ZHANG Fengming

doi:10.11949/j.issn.0438-1157.20161451

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Preparation of ethanedithiol modified Cu-MOFs and its adsorption performance for mercury

更新时间：2025-12-10

- Preparation of ethanedithiol modified Cu-MOFs and its adsorption performance for mercury
- CIESC Journal Issue 5, Pages: 2186-2194(2017)
- 作者机构：
  
  哈尔滨理工大学化学与环境工程学院,黑龙江,哈尔滨,150040
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161451
  CLC： 592
- Online First：05 May 2017，
  
  Published：05 May 2017
- 稿件说明：
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WEI Jinzhi, ZHANG Shaoping, WANG Xueliang, et al. Preparation of ethanedithiol modified Cu-MOFs and its adsorption performance for mercury[J]. CIESC Journal, 2017, (5): 2186-2194.
DOI：

WEI Jinzhi, ZHANG Shaoping, WANG Xueliang, et al. Preparation of ethanedithiol modified Cu-MOFs and its adsorption performance for mercury[J]. CIESC Journal, 2017, (5): 2186-2194. DOI： 10.11949/j.issn.0438-1157.20161451.

摘要

为高效对废水中的Hg2+进行吸附，采用电化学法合成Cu-BDC金属有机骨架材料，并进行-SH修饰，制备SH-Cu-BDC材料，用于对含Hg2+废水的吸附研究。通过EDS与IR红外对修饰前后样品的表征分析可知，-SH基团成功修饰到Cu-BDC材料上；N2吸附实验表明，修饰后的SH-Cu-BDC材料出现微孔结构且比表面积增大；SEM分析表明，电化学合成Cu-BDC材料具有独特花状结构，修饰后SH-Cu-BDC材料表面均匀分布着触角状物质；10 mg SH-Cu-BDC对20 ml浓度为300 mg·L-1的Hg2+溶液进行吸附，当pH=5，60 min时吸附饱和，最大吸附量为585 mg·g-1；SH-Cu-BDC材料对Hg2+的吸附符合拟二级反应动力学方程和Langmuir吸附等温模型，该吸附过程是以表面吸附为主的扩散过程，且符合单分子层吸附规律；吸附再生实验表明，SH-Cu-BDC作为吸附剂可重复使用，且具有一定的稳定性。

Abstract

In order to adsorb Hg2+ in waste water efficiently and quickly

copper-based metal organic frameworks (Cu-MOFs) were prepared using electrochemical method and modified by ethanedithiol to deposit sulfhydryl on it. The SH-Cu-BDC materials obtained were used for adsorbing Hg2+ in waste water. The samples modified before and after were characterized with EDS

N2 adsorption

SEM. The results show that: -SH groups have been connected to the surface of Cu-BDC materials; the modified SH-Cu-BDC materials have micro-porous structure and large specific surface area as well as unique flower structure and evenly distribute antenna shape matter. 10 mg SH-Cu-BDC can absorb about 20 ml Hg2+ solution (300 mg·L-1) at pH=5. The adsorption reaches saturation after 60 min and the maximum capacity (saturated adsorption capacity) is about 585 mg·g-1. The adsorption of Hg2+ on SH-Cu-BDC is monolayer and follows quasi-second-order kinetics and Langmuir adsorption isotherm. Regeneration experiment shows that SH-Cu-BDC may reuse.

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