In this study, poly (ε-caprolactone)/Fe₃O₄ magnetic nanocomposite (PCL/Fe₃O₄ MNC) was synthesized by ring-opening polymerization. Then, PCL/Fe₃O₄ MNC was used as a novel adsorbent to remove remazol brilliant violet 5R (RBV 5R) from the aqueous media. The effects of PCL/Fe₃O₄ MNC dosage, process time, and initial RBV 5R concentration on the removal of RBV 5R were studied using the central composite design (CCD) method. The adsorption process was optimized using the response surface methodology, and the optimum conditions were defined. Optimum RBV 5R removal of 95.40% was obtained at a contact time of 167.98 min, PCL/Fe₃O₄ MNC dosage of 0.40 g, and RBV 5R concentration of 7.18 mg L⁻¹. The process was also designed using the adsorption kinetic models and isotherm. The experimental data of RBV 5R adsorption on PCL/Fe₃O₄ MNC followed the Langmuir isotherm and pseudo-second-order kinetic models than the other models. Morphological and chemical properties of the adsorbent-adsorbate system indicated the high adsorption yield of RBV 5R on PCL/Fe₃O₄ MNC was achieved. The structural characteristics of the PCL/Fe₃O₄ MNC were analyzed by Fourier-transform infrared, attenuated total-reflectance (ATR), and X-ray diffraction. ATR tests showed that no significant change in chemical bond is found in PCL/Fe₃O₄ MNC before and after the adsorption process. The morphology of composites was investigated by scanning electron microscopy. A vibrating sample magnetometer (VSM) was used for the measurement of the magnetic property. Thermal analysis of MNC was studied using thermogravimetric analysis and differential scanning calorimetry instruments.

本研究通过开环聚合合成了聚（ε-己内酯）/Fe ₃ O ₄磁性纳米复合材料（PCL/Fe ₃ O _{4 MNC）。}然后，使用 PCL/Fe ₃ O ₄ MNC 作为新型吸附剂从水介质中去除 remazol 亮紫 5R (RBV 5R)。使用中心复合设计 (CCD) 方法研究了 PCL/Fe ₃ O _{4 MNC 用量、处理时间和初始 RBV 5R 浓度对去除 RBV 5R 的影响。}采用响应面法对吸附过程进行了优化，并确定了最佳条件。_{在 167.98 分钟的接触时间，PCL/Fe 3}下获得了 95.40% 的最佳 RBV 5R 去除率O ₄ MNC 剂量为0.40 g，RBV 5R 浓度为7.18 mg L ^-1。还使用吸附动力学模型和等温线设计了该过程。_{PCL/Fe 3} O ₄ MNC对RBV 5R的吸附实验数据遵循Langmuir等温线和准二级动力学模型，优于其他模型。吸附剂-吸附质体系的形态和化学性质表明，RBV 5R 在PCL/Fe ₃ O ₄ MNC 上具有较高的吸附产率。PCL/Fe ₃ O _{4的结构特点}通过傅里叶变换红外、衰减全反射 (ATR) 和 X 射线衍射分析 MNC。ATR测试表明PCL/Fe ₃ O ₄ MNC在吸附前后化学键没有明显变化。通过扫描电子显微镜研究复合材料的形貌。使用振动样品磁力计（VSM）来测量磁性。使用热重分析和差示扫描量热仪研究了 MNC 的热分析。