吸附
生物炭
水溶液
傅里叶变换红外光谱
自愈水凝胶
朗缪尔吸附模型
化学工程
X射线光电子能谱
解吸
化学
肿胀 的
核化学
离子交换
材料科学
高分子化学
有机化学
热解
离子
工程类
作者
Yu Guo,Xiaoyang Liu,Shuguang Xie,Haiyan Liu,Chenxu Wang,Lingzhi Wang
标识
DOI:10.1016/j.colsurfa.2022.128606
摘要
A novel three dimensional ZnO modified biochar-based hydrogel (ZBCG) was fabricated and employed for removing U(VI) in aqueous solution. The ZBCG hydrogel, the successful loading of ZnO modified biochar (ZBC) confirmed by SEM and FTIR, has showed a well mechanical characteristics, thermal stability, anti-swelling property and adsorption performance for U(VI) than pure hydrogels (BG). At T = 40 ℃, pH = 5, the maximum adsorption capacity of the Langmuir model was 239.21 mg/g. According to adsorption kinetics tests, the chemical adsorption has occupied the leading status in the adsorption process of ZBCG for U(VI). More importantly, ZBCG could be quickly separated and easily regenerated. After 5 cycles of adsorption-desorption, ZBCG have kept the uranium adsorption efficiency of 78.88%. On account of spectroscopic analyses, the mechanisms between ZBCG and U(VI) were involved ion exchange with Zn2+ and chelation by -OH and -COOH. This study proved that ZBCG could be considered the effective and promising material for U(VI) removement from an aqueous solution.
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