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, IR, 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.%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.
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