مشخصات پژوهش

A β-cyclodextrin (β-CD) grafted graphene oxide (GO)/ magnetite (Fe3O4) nano-hybrid was synthesized and used as an innovative adsorbent for magnetic removal of gemfibrozil (Gem) from pharmaceutical wastewater effluents .The sorption media was characterized using powder X-ray diffraction, Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The as-prepared nanohybrid was used for studying the mechanism of magnetic removal of gemfibrozil from aquatic media. The studies were carried out under various experimental conditions such as pH, contact time, Gem initial concentration and temperature to assess the potentiality of the adsorbent regarding the removal of Gem from waste water samples. The equilibrium adsorption data were analyzed using Langmuir, Freundlich and Tempkin isotherms. The thermodynamic parameters such as ΔG°, ΔH° and ΔS° were computed from the vant hoff equation. Freundlich equation showed higher conformity than the other equations with a maximum adsorption capacity of 48.3 mg g–1. The regression results for kinetic adsorption data showed that the adsorption kinetics was more accurately represented by pseudo-second-order model. The calculation of the thermodynamic parameters such as Gibbs free energy, entropy and enthalpy indicated that the adsorption process was spontaneous and exothermic in nature.