Abstract
In the current work, the malachite green (MG) dye was removed from synthetic wastewater by employing a sustainable adsorbent Cajanus cajan (Tur Dal Husk) as an adsorbent. The activated carbon based on Tur Dal Husk (TDH) was prepared and analyzed by analytical techniques methods like the analyzes surface area involving Brunauer-Emmett-Teller (BET) analysis, scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR). The impacts of multiple causes, specifically pH, adsorbent quantity, contact duration, and the concentration of dye was investigated about the elimination of MG dye. The equilibrium isotherms underwent analysis through the Freundlich and Langmuir models. The highest ability to absorb was obtained as 24.81 mg/g, 30.95 mg/g, and 36.49amg/g at 303K, 313K, and 323K respectively. The separation factor value confirmed that the adsorption was beneficial at the adsorption conditions. The kinetics exhibited behavior consistent with pseudo-second-order kinetics. The thermal variables, involving entropy (ΔS), Gibbs free energy (ΔG), and enthalpy (ΔH), revealed that adsorption is a process that occurs naturally and absorbs heat during the process.