Effective and selective adsorption of uranyl ions by porous polyethylenimine-functionalized carboxylated chitosan/oxidized activated charcoal composite  

作　　者：Juan Shen Fang Cao Siqi Liu Congjun Wang Rigui Chen Ke Chen 

机构地区：[1]School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang,621010,China [2]State Key Laboratory of Environmental-friendly Energy Materials,Southwest University of Science and Technology,Mianyang,621010,China

出　　处：《Frontiers of Chemical Science and Engineering》2022年第3期408-419,共12页化学科学与工程前沿（英文版）

基　　金：This work was financially supported by the basic research project of Sichuan Province for Science and Technology Development(Grant No.2019YJ0355);Outstanding Youth Science and Technology Talents Program of Sichuan(Grant No.19JCQN0085);Key Projects of the Pre-research Fund of the General Armament Department(Grant No.6140720020101);National Defense Technology Foundation Project(Grant No.JSJL2016404B002).

摘　　要：Composite materials have elicited much interest because of their superior performance in the removal of toxic and radioactive uranyl ions from aqueous solutions.With polyethyleneimine as a functional group,carboxylated chitosan as a matrix,and oxidizing activated carbon as a nanofiller,this study synthesized a novel environment-friendly polyethylenimine-functionalized carboxylated chitosan/oxidized activated charcoal(PCO)biocomposite with a unique three-dimensional porous structure.PCO was synthesized through an easy chemical cross-linking method.Detailed characterization certified the formation of the unique three-dimensional porous structure.The obtained PCO was used to remove uranyl ions from an aqueous solution,demonstrating the maximum adsorption capacity of 450 mg·g^(−1).The adsorption capacity of PCO decreased by less than 7.51%after five adsorption-desorption cycles.PCO exhibited good adsorption selectivity(K_(d)=3.45×10^(4) mL·g^(−1))for uranyl ions.The adsorption mechanism of PCO was also discussed.The material showed good potential for application in the treatment of wastewater containing uranyl ions.

关 键 词：POLYETHYLENIMINE carboxylated chitosan activated charcoal uranyl ion ADSORPTION 

分 类 号：O62[理学—有机化学]