Miao Pengpai, Gao Jie, Han Xiaobing, Zhao Yuan, Chen Tao
School of Pharmacy, Hubei University of Science and Technology, Xianning 437100, China.
School of Nuclear Technology and Chemistry & Biology, Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Hubei University of Science and Technology, Xianning 437100, China.
Gels. 2024 Jan 21;10(1):81. doi: 10.3390/gels10010081.
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.
使用生物基材料去除水资源中的药物残留对人类安全和健康非常重要。通过乳化和交联制备生物基氧化石墨烯/壳聚糖（GO/CS）气凝胶微球，然后进行冷冻干燥，并将其用于左氧氟沙星（LOF）的吸附。用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和热重分析（TG）对所得的GO/CS气凝胶微球进行表征。研究了GO含量、pH值和温度对其吸附容量的影响。当GO含量为40 wt%时，吸附容量从9.9 mg/g增加到45.6 mg/g，在pH = 8和T = 25 °C时获得最高吸附容量51.5 mg/g。此外，为了更深入地了解吸附过程，还使用四种不同的LOF吸附模型研究了该过程的热力学和动力学。热力学建模结果表明LOF吸附是放热的，动力学研究表明LOF吸附通常符合准一级速率定律。
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