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.