Selective biosorption of Li+ in aqueous solution by lithium ion-imprinted material on the surface of chitosan/attapulgite

被引:2
作者
Xu, Jiaqi [1 ]
Chen, Pan [2 ]
机构
[1] Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410000, Peoples R China
[2] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Peoples R China
基金
湖南省自然科学基金; 中国国家自然科学基金;
关键词
Attapulgite; Ion-imprinted materials; lithium-ion sieve; SALT-LAKE BRINES; CHITOSAN; RECOVERY; ADSORPTION; EXTRACTION; COMPOSITE; URANIUM(VI); SEPARATION; BATTERIES; PERFORMANCE;
D O I
10.1016/j.ijbiomac.2024.133150
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The extraction of Li+ from liquid lithium resources is a pivotal focus of current research endeavors. Attapulgite (ATP), characterized by its distinctive layered structure and inherent ion exchange properties, emerges as an exceptional material for fabricating lithium-ion sieve. Ion-imprinted chitosan/ATP composite materials are successfully synthesized, demonstrating efficacy in selectively absorbing Li+. The results emphasize the rich functional groups present in H-CTP-2, enhancing its absorbability and selectivity, with an adsorption capacity of 37.56 mg center dot g(-1). The adsorption conforms to the Langmuir and pseudo-second-order kinetic model. Li+ coordination involves amino and hydroxyl group, indicating a chemisorption process. Furthermore, the substantial pore structure and significant specific surface area of ATP significantly promote Li+ adsorption, suggesting its participation not only in chemisorption but also in physical adsorption. The fabricated ion-imprinted materials boast substantial adsorption capacity, exceptional selectivity, and rapid kinetics, highlighting their potential for effectively separating Li+ from aqueous solution.
引用
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页数:11
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