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

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外文摘要：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 composi-tions 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 perfor-mance 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.

外文关键词：

ThoriumAdsorptionCitric acidChitosanDFT calculation

作者：

Linshan Peng、Qihang Peng、Tianxiang Jin、Zhirong Liu、Yong Qian

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作者单位：

State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China

Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices,East China University of Technology,Nanchang 330013,China

基金：

江西省自然科学基金Training Program for Academic and Technical Leaders of Major Disciplines of Jiangxi ProvinceOpening Project of Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices

项目编号：

20202BABL21301120225BCJ22008PMND202201

出版年：

2024

DOI：

10.1016/j.cclet.2023.108891

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(5)

参考文献量25