Deletion of Auramine O and Crystal Violet from Industrial Aqueous Solution on to Albizia Lebbeck Leaves-Capped Silver Nanoparticles Synthesis Investigating Parameters Equilibrium

The applicability of Albizia Lebbeck Leaves-capped silver nanoparticles (ALL-AgNPs) synthesis to dyes removal from aqueous solutions has been reported. The main goal of this work was development of a practical system to acquire the optimal conditions of removal accompanied by ultrasonic for maximizeing removal of Auramine O (AO) and Crystal Violet (CV) onto ALL-AgNPs in aqueous solution based on RSM (response surface methodology). To characterization of this novel materials techniques of X-ray diffraction (XRD), Fourier transform infrared  (FT-IR) and scanning electron microscopy (SEM) were employed. The influences of several parameters including initial AO concentration (X1), initial CV concentration (X2), pH (X3), adsorbent dosage (X4), sonication time (X5) evaluated based on CCD (central composite design) using RSM. The process was empirically modeled to reveal the significant variables and their possible interactions. The optimal prameters of ultrasound time, pH, adsorbent mass, AO and CV concentration were obtained 5 min, 6.0, 0.025 g, 25 mg L-1, respectively. The application of isotherms in obtaining the thermodynamic parameters like enthalpy (ΔH0), free energy (ΔG0) and entropy (ΔS0) for adsorption process were confirmed. The maximum monolayer capacities (Q max) of AO and CV were obtained 73.2 and 48.7 mg/g, respectively under optimal conditions.