Herein, MnFe₂O₄/reduced graphene oxide nanoparticles (MrGO) were synthesized for the effective removal of various cationic dyes. The synthesized nanocomposites exhibited high adsorption capacity for removing cationic dyes as malachite green dye MG and methylene blue dye MB reaching 156, and 105 mg/g at 30 °C, respectively. The high surface area of the prepared adsorbent, 95 m²/g, electrostatic interaction, and π-π interaction facilitated dyes removal on MnFe₂O₄/rGO. The physicochemical properties of the synthesized hybrid nanocomposite were investigated using FESEM, XRD, VSM, HRTEM, and N₂-adsorption/desorption isotherms. The influence of contact time, adsorbent dose, initial dye concentration, pH, rate of agitation, and change in temperature were investigated. Various adsorption isotherms equations were applied to give a clear concept on the mechanism of the dye removal process and the results indicated that dyes removal followed both Freundlich and Langmuir models. Kinetics results pointed out that the removal fitted well to pseudo-second-order. The thermodynamic parameters showed that the removal process was endothermic and spontaneous. The synthesized adsorbent showed high stability after reuse for five cycles.

在此，为了有效地去除各种阳离子染料，合成了MnFe ₂ O ₄ /还原氧化石墨烯纳米颗粒（MrGO）。合成的纳米复合材料表现出高的去除阳离子染料的吸附能力，如孔雀石绿染料MG和亚甲基蓝染料MB在30°C时分别达到156和105 mg / g。所制备的吸附剂的高表面积，95 m ² / g，静电相互作用和π-π相互作用促进了MnFe ₂ O ₄ / rGO上染料的去除。使用FESEM，XRD，VSM，HRTEM和N ₂研究了合成的杂化纳米复合材料的理化性质。-吸附/解吸等温线。研究了接触时间，吸附剂剂量，初始染料浓度，pH，搅拌速率和温度变化的影响。应用各种吸附等温线方程式给出了染料去除过程机理的清晰概念，结果表明，染料去除遵循Freundlich和Langmuir模型。动力学结果指出，去除非常适合伪二阶。热力学参数表明该去除过程是吸热的并且是自发的。重复使用五个循环后，合成的吸附剂显示出高稳定性。