ADSORPTION OF DISSOLVED OIL PRODUCTS ON MAGNETIC COMPOSITE SORPTION MATERIAL

Abstract

© 2020. Asian Research Publishing Network (ARPN). All Rights Reserved. With method of chemical modification of wood fiber waste was received sample of magnetic composite sorption material. The elemental composition of materials was identified using the method of energy-dispersive X-ray spectroscopy. Sorption capacity of sorption material were researched in relation to dissolved oil products in neutral and acidic medium at temperature of 288, 298, 308 K. It was determined that with the rise of temperature appears lowering of sorption capacity, what tells about possible physical forces which are holding oil products on the surface of sorption material. In acidic medium occurs lowering of sorption capacity. Adsorption isoterms of oil products which were received describe polymolecular adsorption and are characteristic for porous SM. Adsorption capacity in neutral medium at temperature of 288 K made up 6,21mg/g, at temperature of 298 and 308 K - 6.05 and 5.83 mg/g accordingly. Adsorption isotherms worked out within Langmuire, Dubin-Radushkevich and Freundlich models. It was determined that Dubin-Radushkevich model describes adsorption process better than any other. Calculated thermodynamic constants confirmed that adsorption process of oil products on magnetic composite sorption material appears due to physical interaction. Formulated kinetic relations allowed to make a conclusion that adsorption process kinetic on considered sorption material are limited by its outer diffusion.