A green, non-polluting magnetic iron–carbon composite material FCH with humic acid as a raw material was synthesized by high-temperature oxidation–reduction method, and was first applied to the adsorption and removal of methylene blue in water. And it has lower synthesis cost. The morphology and microstructure of the samples were characterized by scanning electron microscopy, X-ray diffractometer, Thermal analysis, and Fourier transforms infrared spectroscopy was used to analyze the composition and structure of materials, and the magnetic strength of the samples was analyzed by using a vibrating sample magnetometer. The pseudo-first-order and pseudo-second-order kinetic models were used to describe the kinetic data and the Langmuir and Freundlich models were applied to describe the adsorption isotherms. The results showed that the equilibrium adsorption data were found to fit better to the Langmuir adsorption model and the kinetic process of adsorption could be described by the pseudo-first-order model. Compared with humic acid, iron–carbon composite materials can effectively improve the adsorption rate and adsorption capacity of methylene blue, and the adsorption capacity is as high as 34.45 mg/g within 30 min. Moreover, the material has super paramagnetic strength, and the composite material can be quickly separated from the aqueous solution in the presence of an external magnetic field. It finds that the material had good reusability through regeneration experiments.

以腐殖酸为原料，绿色环保无污染的磁性碳铁复合材料FCH通过高温氧化还原法合成，首先用于吸附和去除水中的亚甲基蓝。并且具有较低的合成成本。用扫描电子显微镜，X射线衍射仪，热分析表征样品的形貌和微观结构，用傅立叶变换红外光谱分析材料的组成和结构，并用红外光谱分析样品的磁强度。振动样品磁力计。拟一级动力学模型和拟二级动力学模型用于描述动力学数据，Langmuir模型和Freundlich模型用于描述吸附等温线。结果表明，平衡吸附数据更符合Langmuir吸附模型，吸附的动力学过程可以用拟一阶模型描述。与腐殖酸相比，铁碳复合材料可以有效提高亚甲基蓝的吸附速率和吸附能力，在30分钟内的吸附量高达34.45 mg / g。此外，该材料具有超顺磁性强度，并且在存在外部磁场的情况下可以将复合材料与水溶液快速分离。通过再生实验发现该材料具有良好的可重复使用性。与腐殖酸相比，铁碳复合材料可以有效提高亚甲基蓝的吸附速率和吸附能力，在30分钟内的吸附量高达34.45 mg / g。此外，该材料具有超顺磁性强度，并且在存在外部磁场的情况下可以将复合材料与水溶液快速分离。通过再生实验发现该材料具有良好的可重复使用性。与腐殖酸相比，铁碳复合材料可以有效提高亚甲基蓝的吸附速率和吸附能力，在30分钟内的吸附量高达34.45 mg / g。此外，该材料具有超顺磁性强度，并且在存在外部磁场的情况下可以将复合材料与水溶液快速分离。通过再生实验发现该材料具有良好的可重复使用性。