Abstract In this research, we synthesized GO by a Hummer's method and decorated with it MnFe2O4 magnetic nanoparticles that is synthesized by the sol-gel method to remove methylene blue dye as a primary cationic organic dye pollutant model, from wastewaters. Successful removal of MB has been achieved on MnFe2O4/rGO magnetic nanoparticles (MRGO) having a surface area of 95 m2/g at different pH with maximum adsorption capacity 105 mg/g at pH 7.50. The effects of contact time, adsorbent dose, and change in pH were also studied. The kinetics of adsorption model follows the pseudo-second order mechanism.This magnetic facilely separable adsorbent retains 85% of its reactivity on dye removal after the reuse it for four-times.

中文翻译：

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使用锰铁氧体纳米颗粒功能化的还原氧化石墨烯有效去除水溶液中的阳离子染料

摘要 在这项研究中，我们通过 Hummer 方法合成了 GO，并用它装饰了 MnFe2O4 磁性纳米粒子，该纳米粒子通过溶胶-凝胶法合成，以去除废水中作为主要阳离子有机染料污染物模型的亚甲蓝染料。MnFe2O4/rGO 磁性纳米粒子 (MRGO) 在不同 pH 下具有 95 m2/g 的表面积，在 pH 7.50 下的最大吸附容量为 105 mg/g，已成功去除 MB。还研究了接触时间、吸附剂剂量和 pH 变化的影响。吸附动力学模型遵循准二级机理。这种磁性易分离的吸附剂在重复使用四次后仍保留其85%的脱色反应活性。