The carboxymethyl chitosan and sodium ferrosilicate were successfully combined and magnetized by the hydrothermal method, and then citric acid was used as a dispersant to further modify the composite material, effectively avoiding the aggregation effect of the material. The composite material showed a large adsorption capacity (515.0 mg g⁻¹) for methylene blue (MB). The composite materials were characterized by XRD, SEM, EDX, FTIR, VSM, BET, Zeta and other characterization methods. The results showed that the composite with citric acid as dispersant had a larger specific surface area and a richer pore structure, and the negative potential on the surface of the composite material made it more conducive for the adsorption of cationic dye MB. The Langmuir model and the pseudo second-order kinetic model were used to explain the process of composite material adsorption of MB. In addition, the composite material had good recycling and reuse characteristics, and had great application value in the field of wastewater treatment.

羧甲基壳聚糖与铁硅酸钠通过水热法成功结合磁化，再以柠檬酸为分散剂对复合材料进行进一步改性，有效避免了材料的团聚效应。复合材料显示出较大的吸附容量（515.0 mg g ^-1) 为亚甲蓝 (MB)。采用XRD、SEM、EDX、FTIR、VSM、BET、Zeta等表征方法对复合材料进行了表征。结果表明，以柠檬酸为分散剂的复合材料具有更大的比表面积和更丰富的孔结构，复合材料表面的负电位使其更有利于阳离子染料MB的吸附。Langmuir模型和拟二级动力学模型被用来解释复合材料吸附MB的过程。此外，该复合材料具有良好的回收再利用特性，在废水处理领域具有很大的应用价值。