PROPERTIES OF MAGNETIC CARBON BASE ON RICINODENDRONHEUDELOTII AND APPLICATION IN REMOVAL OF METHYLENE BLUE

The shells of RicinodendronHeudelotii, an agricultural waste, were used to prepare magnetic activated carbon. To do this, activated carbon was prepared by chemical activation with NaOH. By co-precipitation with iron II and iron III ions, magnetic carbon (MG-AC) is obtained. These materials were characterized using scanning electron microscopy (SEM), nitrogen gas adsorption measurements at -196°C, energy dispersive X-ray fluorescence and a vibrating sample magnetometer. The results showed that MG-AC had 86.5% Fe2O3 and higher magnetic properties with a magnetic saturation of 75 emu.g-1. The Brunauer-Emmett-Teller (BET) surface area and pore volume of MG-AC were determined as 86.52 m2.g-1and 0.168 cm3.g-1 respectively. The removal of methylene blue on these two materials (AC and MG-AC) was done in the absence and in the presence of hydrogen peroxide. In the absence of , methylene blue adsorbs on these materials according to a pseudo order 2 kinetics with rates of 0.0047 and 0.0039 g.mg-1.min-1 respectively for AC and MG-AC. This adsorption can be described by the Langmuir model with maximum adsorption amounts of 13.4 and 9.6 mg.g-1 respectively for AC and MG-AC. The addition of leads to the production of hydroxyl radicals thanks to the presence of iron on MG-AC. Over 4 cycles of use Activated Carbon based on RicinodendronHeudelotii removed 99.6% of MB in the 1st cycle and only 5.23% due to the considerable loss of mass, while MG-AC removed this dye at 94.6% in the first cycle and 68.44% in the 4th cycle. There is therefore less loss of mass during the regeneration of MG-AC which still remains efficient after 4 cycles.