Study on Magnetic Porous Carbon Microspheres as a Novel Adsorbent for Malachite Green

摘要

In this paper, a novel adsorbent of magnetic mesoporous carbon microspheres (MCS) are prepared by template methods and using nano-Fe3O4 particles as magnetic cores, and the adsorption capacity and mechanism are studied in detail. The results show that MCS exhibits high performance for removing malachite green (MG), the highest adsorption capacity can reach about 468.5 mg g(-1). Furthermore, the Langmuir adsorption isotherm model and the quasi-second-order kinetic model can explain the experimental phenomena very well. And the high adsorption capacity of MCS is mainly attributed to its unique mesoporous structure by increasing the specific surface area and providing sufficient active sites. In addition, after magnetic separation and recovery, MCS can be regenerated with ethanol. And MCS maintains a high adsorption rate of 84.5 % after 5 cycles of MG adsorption and desorption. This composite material with high adsorption efficiency and rapid magnetic separation is a promising recyclable adsorbent for the actual wastewater treatment and purification process.