adsorption of oil products using modified woodworking waste

We obtained magnetic sorption material based on wood processing wastes by chemical modification. the elemental composition of the initial and modified samples was determined. it was revealed that magnetic sorption material had sorption properties regarding to oil products dissolved in an aqueous medium. sorption properties at ph=4 and ph=7 on model solutions containing petroleum products under static conditions were studied. to establish the effect of temperature, the experiments were carried out in a thermostatic medium at temperatures of 15, 25 and 35 °c. it was established that in an acidic medium and with increasing temperature, the cleaning efficiency of model solutions decreased, which indicated the probablity of the physical adsorption. at ph=7 in an aqueous medium using the method of variable weights and constant concentrations, isotherms of oil products adsorption were constructed. according to the classification of giles, received isotherms relate to l class (langmuir class). the maximum adsorption capacity-0.0323 mmol/g was observed at a temperature of 15 °c and an increase in temperature to 35 °c adsorption capacity decreased to 0.0309 mmol/g. the calculations of thermodynamic parameters showed that the process of adsorption of oil products on the considered sorption material could be described by the dubin-radushkevich model, which was due to physical interaction. the boyd’s model was used to obtain insight into the mechanism of the physical adsorption kinetics. it was found that the kinetics of the processes of oil product adsorption on magnetic sorption material was limited by external diffusion.