A CoFe₂O₄(11.04%)-graphene (5.45%) nanocomposite was synthesized and characterized by spectroscopic techniques. This nanocomposite was used to eliminate tigecycline antibiotics from the water. The adsorbent showed 160.0 mg/g adsorption capacity of tigecycline antibiotic at 175 mg/L tigecycline, 0.75 g/L dose, 100 min of contact time, and a temperature of 25 °C. One-, two-, and three-parameter models were applied, i.e., Henry, Langmuir, Freundlich, D–R, Temkin, Flory–Huggins, Halsey, Jovanovich, Redlich–Peterson, and Sips models. According to statistical data, Langmuir and Sips models were the best fitted. The adsorption was spontaneous thermodynamically following pseudo-second-order kinetics. The adsorption occurred via a combination of intraparticle diffusion and external mass transfer mechanisms. The supramolecular mechanism showed the adsorption of the tigecycline antibiotic via coordination and π–π stacking bonds. The characterization results showed that the average nanoparticle size obtained was 91.45 nm. The removal efficiency of the adsorbent reduced up to the fifth cycle and later became constant at 50%. Hence, CoFe₂O₄-graphene nanocomposites propose a highly effective and recyclable solution for water treatment through adsorption, and hence, this method may be used to remove tigecycline antibiotics from water bodies.

中文翻译：

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替加环素从水中对 CoFe2O4-石墨烯纳米复合材料的吸附建模


合成了 CoFe₂O₄（11.04%）-石墨烯 （5.45%） 纳米复合材料，并通过光谱技术进行了表征。这种纳米复合材料用于从水中消除替加环素抗生素。吸附剂显示替加环素抗生素在 175 mg/L 替加环素、0.75 g/L 剂量、100 min 接触时间和 25 °C 温度下的吸附容量为 160.0 mg/g。 应用了单参数、双参数和三参数模型，即 Henry、Langmuir、Freundlich、D-R、Temkin、Flory-Huggins、Halsey、Jovanovich、Redlich-Peterson 和 Sips 模型。根据统计数据，Langmuir 和 Sips 模型拟合最好。吸附是遵循准二级动力学的自发热力学反应。吸附是通过颗粒内扩散和外部传质机制的组合发生的。超分子机制显示替加环素抗生素通过配位和 π-π 堆叠键吸附。表征结果表明，获得的平均纳米粒径为 91.45 nm。吸附剂的去除效率降低到第五次循环，后来在 50% 时保持不变。因此，CoFe₂O₄-石墨烯纳米复合材料提出了一种高效且可回收的吸附水处理解决方案，因此，该方法可用于从水体中去除替加环素抗生素。