Adsorption characteristics of U(VI) in aqueous solution by chloroacetic acid-modified MXene-CS gel microspheres

被引:12
作者
Li, Shiyou [1 ,2 ]
He, Junqin [1 ]
Wang, Yang [1 ]
Qiao, Jishuai [1 ]
Yang, Yubiao [1 ]
Wang, Guohua [1 ,2 ]
机构
[1] Univ South China, Coll Civil Engn, Hengyang 421001, Peoples R China
[2] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Tech, Hengyang 421001, Peoples R China
基金
中国国家自然科学基金;
关键词
MXene; Chitosan; Gel microsphere; U(VI); Adsorption; OXIDE-CHITOSAN COMPOSITE; TI3C2TX MXENE; ALKALIZATION; PERFORMANCE; URANIUM(VI); MECHANISM; REMOVAL; PH;
D O I
10.1016/j.colsurfa.2023.131983
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
To solve the problems of the poor stability and low adsorption efficiency of MXene used as an adsorbent for heavy metal removal. In this study, the microwave-assisted novel composite of chloroacetic acid-modified MXene-chitosan gel microspheres (C-TC-CS) was prepared. The experimental results demonstrated that C-TC-CS exhibited good stability and U(VI) adsorption performance, the maximum adsorption capacity of U(VI) by C-TC-CS was up to 141.96 mg/g. Pseudo-second-order and Langmuir isotherm adsorption models fit the adsorption process well, and the thermodynamic parameters showed that the adsorption process was spontaneous and endothermic. Importantly, C-TC-CS could be easily separated and regenerated. After five cycles of regeneration, the adsorption efficiency of C-TC-CS for U(VI) remained above 74%. Spectroscopic analyses indicated that the main adsorption mechanism involved electrostatic interactions, ion exchange, and complexation. This study proved that C-TC-CS could be an effective and promising adsorbent for removing U(VI) from aqueous solution.
引用
收藏
页数:12
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