Abstract Environmentally friendly magnetic coal-based activated carbon (MCAC) with high adsorption performance has been synthesized by using a facile one-step method. The samples were prepared with ratios of ferrocene to Ningxia coking coal to be 0:1, 1:2, 1:1, 2:1 and 3:1 (denoted as CAC, MCAC-1:2, MCAC-1:1, MCAC-2:1 and MCAC-3:1, respectively). Scanning electron microscopy (SEM) observation indicated that there were a large number of pores with diameters below 500 nm on surface of the MCAC. Magnetic properties of the samples were characterized by vibrating sample magnetometer (VSM), with saturation magnetizations of 9.55-22.48 emu/g. Due to the activation of KOH and the introduction of magnetic particles, the MCAC had a maximum specific surface area of 1188.00 m2/g and a maximum total porosity of 0.50 cm3/g. As a result, the MCAC exhibited excellent adsorption properties to remove methylene blue (MB), with an adsorption capacity of 238.56 mg/g, while the adsorption rate was still 88% after 5 cycles. Therefore, this strategy can be used as a reference for the clean and efficient use of coal.

中文翻译：

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具有高吸附磁分离性能的环保型磁性煤基活性炭一步法制备

摘要 采用简便的一步法合成了具有高吸附性能的环保磁性煤基活性炭（MCAC）。试样制备时二茂铁与宁夏炼焦煤的比例分别为 0:1、1:2、1:1、2:1 和 3:1（分别表示为 CAC、MCAC-1:2、MCAC-1:1、 MCAC-2:1 和 MCAC-3:1）。扫描电子显微镜（SEM）观察表明，MCAC 表面存在大量直径小于 500 nm 的孔。样品的磁特性通过振动样品磁强计(VSM)表征，饱和磁化强度为9.55-22.48 emu/g。由于 KOH 的活化和磁性颗粒的引入，MCAC 的最大比表面积为 1188.00 m2/g，最大总孔隙率为 0.50 cm3/g。因此，MCAC表现出优异的去除亚甲基蓝(MB)的吸附性能，吸附容量为238.56 mg/g，5次循环后吸附率仍为88%。因此，该策略可作为煤炭清洁高效利用的参考。