A pyrazine based metal-organic framework for selective removal of copper from strongly acidic solutions  

作　　者：Jiachuang Shao Penghui Shao Mingming Peng Min Li Ziwei Yao Xiuqin Xiong Caiting Qiu Yufan Zheng Liming Yang Xubiao Luo 

机构地区：[1]Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle,National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource utilization,Nanchang Hangkong University,Nanchang 330063,China [2]Department of Chemical Engineering,Chongqing University of Science and Technology,Chongqing 401331,China

出　　处：《Frontiers of Environmental Science & Engineering》2023年第3期75-86,共12页环境科学与工程前沿（英文）

基　　金：the National Natural Science Foundation of China(Nos.52125002 and 51908270);the Natural Science Foundation of Jiangxi Province(No.20212ACB213006),and the National Key Research and Development Program of China(No.2019YFC1907900).

摘　　要：The selective capture of copper from strongly acidic solutions is of vital importance from the perspective of sustainable development and environmental protection.Metal organic frameworks(MOFs)have attracted the interest of many scholars for adsorption due to their fascinating physicochemical characteristics,including adjustable structure,strong stability and porosity.Herein,pz-UiO-66 containing a pyrazine structure is successfully synthesized for the efficient separation of copper from strongly acidic conditions.Selective copper removal at low pH values is accomplished by using this material that is not available in previously reported metal–organic frameworks.Furthermore,the material exhibits excellent adsorption capacity,with a theoretical maximum copper uptake of 247 mg/g.As proven by XPS and FT-IR analysis,the coordination of pyrazine nitrogen atoms with copper ions is the dominant adsorption mechanism of copper by pz-UiO-66.This work provides an opportunity for efficient and selective copper removal under strongly acidic conditions,and promises extensive application prospects for the removal of copper in the treatment for acid metallurgical wastewater.

关 键 词：PYRAZINE Metal-organic frameworks Copper removal Strong acidity High selectivity 

分 类 号：O62[理学—有机化学]