Activated Ailanthus altissima Sawdust as Adsorbent for Removal of Acid Yellow 29 from Wastewater: Kinetics Approach

In this study, Ailanthus altissima sawdust was chemically activated and characterized by Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR), Energy Dispersive X rays (EDX), surface area analyzer. The used as an adsorbent for the removal of azo dye; Acid Yellow 29 (AY 29) from wastewater. Different kinetic equilibrium models were to calculate adsorption parameters. Among applied models, more suitable model Freundlich with maximum capacities 9.464, 12.798, 11.46 mg/g at 20 °C, 30 40 °C respectively while R2 values close 1. Moreover, data best fitted in pseudo second order high approaching Furthermore, thermodynamics parameters such free energy, enthalpy, entropy calculated process found be exothermic a value ?H° = ?9.981 KJ mol?1, spontaneous that concluded ?G° which negative (?0.275, ?3.422, ?6.171 mol?1 20, 30, respectively). A positive change ?S° 0.0363 indicated increase disorder during process. It could waste material, especially dyes polluted waters.