气凝胶
吸附
傅里叶变换红外光谱
材料科学
化学工程
石墨烯
壳聚糖
氧化物
热重分析
复合数
动力学
纳米技术
化学
有机化学
复合材料
冶金
工程类
物理
量子力学
作者
Pengpai Miao,Jie Gao,Xiaobing Han,Yuan Zhao,Tao Chen
出处
期刊:Gels
[MDPI AG]
日期:2024-01-21
卷期号:10 (1): 81-81
摘要
The removal of pharmaceutical residues from water resources using bio-based materials is very important for human safety and health. Bio-based graphene oxide/chitosan (GO/CS) aerogel microspheres were fabricated with emulsification and cross-linking, followed by freeze drying, and were used for the adsorption of levofloxacin (LOF). The obtained GO/CS aerogel microspheres were characterized with scanning electron microscopy (SEM), Fourier-transform infrared (FTIR), and thermogravimetry (TG). The effects of GO content, pH value, and temperature on their adsorption capacity were investigated. With the incorporation of 40 wt% GO, the adsorption capacity increased from 9.9 to 45.6 mg/g, and the highest adsorption capacity, 51.5 mg/g, was obtained at pH = 8 and T = 25 °C. In addition, to obtain deeper insight into the adsorption process, the thermodynamics and kinetics of the process were also investigated with four different models of LOF adsorption. The thermodynamic modeling results revealed that LOF adsorption is exothermic, and the kinetic investigation demonstrated that LOF adsorption is generally consistent with a pseudo-first-order rate law.
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