The aim of this study is synthesize of Fe₃O₄@SiO₂-Schiff base nanocomposite (Fe₃O₄@SiO₂-APTMS-HBA) as a new and effective adsorbent in the removal of CIP antibiotic from aqueous medium. Field emission scanning electron microscope (FESEM) with energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM) analyses were used to investigate the morphological, structural, and magnetic properties of Fe₃O₄@SiO₂-APTMS-HBA. The parameters affecting the adsorption process including, initial pH solution, adsorbent concentration, CIP concentration and contact time were investigated. The maximum removal was achieved with 96% efficiency under optimum process conditions, including pH 7, contact time = 5 min, CIP concentration = 10 mg/L, and adsorbent concentration 50 mg/L. In the isotherms and kinetic studies of the adsorption process, the results showed that the adsorption process followed the pseudo-quadratic kinetic model and Freundlich isotherm. The maximum adsorption capacity (q_m) was obtained as 415.3 mg/g. Fe₃O₄@SiO₂-APTMS-HBA had advantages such as fast pollutant adsorption power, easy magnetic separation from aqueous solutions by the magnet, and reusability in several stages without changes in the magnetic property. Therefore, Fe₃O₄@SiO₂-APTMS-HBA nanocomposite can be used in the removal of recalcitrant pollutants such as CIP antibiotics.

中文翻译：

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评价Fe 3 O 4 @SiO 2-席夫碱（Fe 3 O 4 @SiO 2 -APTMS-HBA）上修饰的纳米颗粒在环丙沙星在水环境中的吸附

这项研究的目的是合成Fe ₃ O ₄ @SiO _2-席夫碱纳米复合材料（Fe ₃ O ₄ @SiO ₂ -APTMS-HBA）作为一种新型的有效吸附剂，用于从水性介质中去除CIP抗生素。使用具有能量色散光谱（EDS）的场发射扫描电子显微镜（FESEM），傅立叶变换红外光谱（FTIR），X射线粉末衍射（XRD），透射电子显微镜（TEM ）和振动样品磁力计（VSM）分析来进行分析研究Fe ₃ O ₄ @SiO ₂的形态，结构和磁性-APTMS-HBA。研究了影响吸附过程的参数，包括初始pH溶液，吸附剂浓度，CIP浓度和接触时间。在最佳工艺条件下，包括pH 7，接触时间= 5分钟，CIP浓度= 10 mg / L和吸附剂浓度50 mg / L，在96％的最佳工艺条件下实现了最大去除率。在吸附过程的等温线和动力学研究中，结果表明吸附过程遵循拟二次动力学模型和弗氏等温线。获得的最大吸附容量（q _m）为415.3 mg / g。铁₃ O ₄ @SiO ₂-APTMS-HBA具有以下优点：污染物吸附力快，易于从磁铁中与水溶液磁性分离，在不改变磁性的情况下可以在多个阶段重复使用。因此，Fe ₃ O ₄ @SiO ₂ -APTMS-HBA纳米复合材料可用于去除顽固性污染物，如CIP抗生素。