Effective adsorption of crystal violet from aqueous solutions with effective adsorbent: equilibrium, mechanism studies and modeling analysis

In this work, NaOH-activated Aerva javanica leaf (NAJL) powder was successfully developed as a cost-effective adsorbent for removal of crystal violet (CV) from an aqueous environment. The prepared characterized using FTIR, SEM, and their surface area determined by BET technique. Different parameters affecting the adsorption CV dye such pH solution, dose, equilibrium time, initial concentration, temperature were investigated. results revealed that best-optimized values found pH–9, dose–20 mg, time–30 min, temperature– 25 °C. experimental data exhibited excellently fitted well to nonlinear Langmuir isotherm Pseudo-first-order kinetic models. maximum monolayer capacity 315.2 mg/g. thermodynamic analysis onto NAJL exothermic spontaneous. Electrostatic attraction, ?-? interactions, Hydrogen bonding mechanism behind dye.