Application of response surface methodology to optimize removal efficiency of fluoride by ionic liquid modified magnetic activated carbon nanocomposite from aqueous solution in Zahedan, Iran

Abstract

Fluoride in high concentration is very hazardous and a threat to human life. Response surface methodology (RSM) was employed for the removal of fluoride on ionic liquid-modified magnetic activated carbon (IL@mAC) nanocomposite and the process parameters were optimized. In this study, ionic liquid-modified magnetic activated carbon nanocomposite was synthesized by (1), Fourier transform infrared spectroscopy (FTIR) and X-ray Powder Diffraction (XRD) and the adsorption efficiency of IL@mAC for removal of fluoride was investigated under different operational such as pH (2-8), contact time (15-100), initial concentration of F (10-50), and IL@mAC composite (0.01-0.1) at room temperature. The equilibrium experiment showed that the highest removal efficiency (~88%) was obtained using Conditions for the pH (5), the initial concentration of adsorbent (0.1 mg/L), the initial concentration of fluoride (50 mg/L) and the processing time (15 min). ANONA high correlation coefficients for the proposed model were also obtained (adjusted R2=0.9527 and R2=0.8048). the pseudo-second-order kinetic model was the ideal model (R2=0.998).The current study showed that the adsorption process with optimization of effective operational factors, is highly efficient in the removal of fluoride.

Keywords: Fluoride, Ionic Liquid Modification Magnetic activated carbo, Response Surface Methodology, Aqueous solution,