Highly efficient capture of thorium ion by citric acid-modified chitosan gels from aqueous solution  

作　　者：Linshan Peng Qihang Peng Tianxiang Jin Zhirong Liu Yong Qian 

机构地区：[1]State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China [2]Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices,East China University of Technology,Nanchang 330013,China

出　　处：《Chinese Chemical Letters》2024年第5期361-365,共5页中国化学快报（英文版）

基　　金：the financial support of the Natural Science Foundation of Jiangxi Province(No.20202BABL213011);the Training Program for Academic and Technical Leaders of Major Disciplines of Jiangxi Province(No.20225BCJ22008);the Opening Project of Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices(No.PMND202201)。

摘　　要：A novel citric acid-modified chitosan gel(CSCA)was synthesized through a simple one-step process and was used to extract thorium ions from wastewater.The CSCA samples with varying chemical compositions were analyzed using SEM with mapping EDS,FT-IR,and static water contact angle measurements,and their adsorption behaviors were studied in detail.The results showed that the adsorption performance of CSCA improves with the increase of CA content in the sample.CSCA possesses an impressive capacity for thorium adsorption of 279.8 mg/g.Furthermore,it showed an ultra-fast adsorption rate and reached equilibrium within 30 min.In terms of recyclability,the CSCA still retained more than 86%of its initial adsorption capacity after 6 cycles of reuse.Density functional theory(DFT)analysis reveals that the good selectivity of this material towards thorium ions should be attributed to the high density of adsorption sites and strong interaction between carboxyl groups and thorium ions.This work could be beneficial in the design and synthesis of new polymer materials for extracting thorium.

关 键 词：THORIUM Adsorption Citric acid CHITOSAN DFT calculation 

分 类 号：O614.42[理学—无机化学] TQ427.26[理学—化学]