Magnetic nickel ferrite (NiFe₂O₄) nanorods were prepared via an innovative alcohol-solution combustion-calcination technique and evaluated for removing methyl blue (MB), which may greatly benefit for dye-polluted water treatment. The magnetic nanorods were characterized by TEM, EDS, XRD, VSM, SAED, FTIR, XPS and BET, the results showed that the NiFe₂O₄ sample has high magnetic saturation (Ms) and soft superparamagnetic behavior, and these properties accounted for their facile separation from the aqueous solution when an external magnetic field was applied. To understand the adsorption mechanism, adsorption experiments were performed using adsorption kinetics and adsorption isotherms. The Temkin model and the pseudo-second-order kinetic model best described the adsorption characteristics of MB onto NiFe₂O₄ nanorods. The effect of pH on the adsorption process was investigated, when pH was 3–7, the maximum adsorption capacity was reached, which was about 62 mgg⁻¹. The recycling efficiency was also estimated, after 10 runs of regeneration, it remained 70.1% initial adsorption capacity, indicating the adsorbent could be efficiently reused for the adsorption of MB.

磁性镍铁氧体 (NiFe ₂ O ₄ ) 纳米棒是通过创新的醇溶液燃烧-煅烧技术制备的，并评估其去除甲基蓝 (MB) 的能力，这可能对染料污染的水处理大有裨益。通过TEM、EDS、XRD、VSM、SAED、FTIR、XPS和BET对磁性纳米棒进行表征，结果表明NiFe ₂ O ₄样品具有高磁饱和 (Ms) 和软超顺磁行为，这些特性解释了当施加外部磁场时它们与水溶液的容易分离。为了理解吸附机理，使用吸附动力学和吸附等温线进行吸附实验。Temkin 模型和准二级动力学模型最好地描述了 MB 在 NiFe ₂ O ₄纳米棒上的吸附特性。考察了pH对吸附过程的影响，当pH为3-7时，达到最大吸附容量，约为62 mgg ^-1. 还估算了回收效率，经过 10 次再生后，仍保持 70.1% 的初始吸附容量，表明吸附剂可以有效地重新用于 MB 的吸附。