A novel magnetic biocomposite adsorbent, denoted as AgZnFe₂O₄@Ch, was utilized for the degradation of Metronidazole (MNZ) from water. Various analytical techniques, including vibrating sample magnetometer (VSM), X-ray diffraction (XRD), Brunauer–Emmett–Teller, Fourier transform infrared spectroscopy, and field emission scanning electron microscopy (FESEM), were applied to investigate the characteristics of the magnetic biocomposite adsorbent. XRD examination confirmed the formation of spinel ferrites phases. FESEM assessment indicated a notable reduction in sample aggregation. The ferromagnetic character of the adsorbent was well demonstrated by VSM analysis. The saturation magnetization value for straightforward separating by the outside magnetic fields was 14.64 emu/g. An analytical modeling approach was used to evaluate and analyze the impacts of factors including MNZ initial concentration, temperature, contact time, adsorbent dosage, and pH. Optimized conditions involved an adsorbent dosage of 0.9 g/L, pH of 7, MNZ initial concentration of 10 mg/L, and a contact time of 50 min, resulting in a peak adsorption efficiency of 65.53% under favorable circumstances. A good degree of fit was achieved with the linear model. The experimental equilibrium data fitting to the Langmuir, Freundlich, and Temkin isotherm models demonstrates that the Langmuir model was an effective and appropriate model for evaluating adsorption. Intraparticle kinetic modeling was also shown to be better suitable for characterizing the MNZ adsorption onto the adsorbent. The thermodynamic analysis indicated that the process of MNZ adsorption by AgZnFe₂O₄@Ch was characterized by exothermicity and lacked spontaneity.

一种新型磁性生物复合吸附剂，称为AgZnFe ₂ O ₄ @Ch，用于降解水中的甲硝唑（MNZ）。应用各种分析技术，包括振动样品磁强计 (VSM)、X 射线衍射 (XRD)、Brunauer-Emmett-Teller、傅立叶变换红外光谱和场发射扫描电子显微镜 (FESEM)，研究磁性材料的特性。生物复合吸附剂。 XRD 检查证实了尖晶石铁氧体相的形成。 FESEM 评估表明样品聚集显着减少。 VSM 分析很好地证明了吸附剂的铁磁特性。通过外部磁场直接分离的饱和磁化值为14.64 emu/g。采用分析模型方法评估和分析 MNZ 初始浓度、温度、接触时间、吸附剂剂量和 pH 等因素的影响。优化条件为吸附剂用量为0.9 g/L、pH为7、MNZ初始浓度为10 mg/L、接触时间为50 min，在有利的条件下，峰值吸附效率为65.53%。线性模型获得了良好的拟合度。与 Langmuir、Freundlich 和 Temkin 等温线模型拟合的实验平衡数据表明，Langmuir 模型是评估吸附的有效且合适的模型。颗粒内动力学模型也被证明更适合表征 MNZ 在吸附剂上的吸附。热力学分析表明AgZnFe ₂ O ₄ @Ch对MNZ的吸附过程具有放热性且缺乏自发性。