Magnetic Co_0.5Zn_0.5Fe₂O₄ nanoparticles were synthesized via the facile nitrate-alcohol solution combustion process, and they were characterized by transmission electron microscopy, energy dispersive x-ray spectroscopy, scanning electron microscopy, and x-ray diffraction and using a vibrating sample magnetometer. Magnetic Co_0.5Zn_0.5Fe₂O₄ nanoparticles with an average particle size of around 90 nm and a saturation magnetization (M_S) of 9.8 A m²/kg were employed to adsorb methyl blue (MB) from an aqueous medium. The study of magnetic Co_0.5Zn_0.5Fe₂O₄ nanoparticles for MB adsorption at room temperature was performed, and the experimental data related to the adsorption of MB showed that the adsorption performance followed the pseudo-second kinetics model. When the initial concentration of MB was 400 mg l⁻¹, the adsorption capacity of MB onto Co_0.5Zn_0.5Fe₂O₄ nanoparticles reached 98.5 mg l⁻¹. The Temkin isotherm matched well with the adsorption process owing to the values of the square deviations (R² = 0.99), which suggested that the mechanism of Co_0.5Zn_0.5Fe₂O₄ nanoparticles for MB adsorption followed the adsorption behavior of monolayer and multilayer. The adsorbance value was high when the pH value exceeded 5, and the adsorbance amounted to 65% of the initial one via eight recycles.

中文翻译：

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硝酸乙醇溶液燃烧过程合成的磁性Co0.5Zn0.5Fe2O4纳米粒子对甲基蓝的吸附机理

磁性的Co _0.5 Zn _0.5 Fe ₂ O ₄纳米粒子通过硝酸盐-乙醇溶液燃烧过程容易地合成，并通过透射电子显微镜，能量色散X射线光谱，扫描电子显微镜和X射线衍射进行了表征。振动样品磁力计。具有约90 nm的平均粒径和9.8 A m ² / kg的饱和磁化强度（M _S）的磁性Co _0.5 Zn _0.5 Fe ₂ O ₄纳米颗粒用于从水性介质中吸附甲基蓝（MB）。磁性Co _0.5 Zn _0.5的研究进行了Fe ₂ O ₄纳米粒子在室温下吸附MB的实验，与MB吸附有关的实验数据表明，吸附性能遵循拟秒动力学模型。当MB的初始浓度为400mg l ^-1时，MB在Co _0.5 Zn _0.5 Fe ₂ O ₄纳米颗粒上的吸附容量达到98.5 mg l ^-1。Temkin等温线的平方偏差值（R ² = 0.99）与吸附过程很好地匹配，这表明Co _0.5 Zn _0.5 Fe ₂ O的机理_4种纳米颗粒对MB的吸附遵循单层和多层的吸附行为。当pH值超过5时，吸附值高，并且经过八次循环，吸附率达到初始值的65％。