Enhancement of crystal violet dye adsorption on Artocarpus camansi peel through sodium hydroxide treatment

This study investigated the potential use of breadnut peel (KS) and NaOH-KS for the removal of crystal violet (CV) dye from aqueous solution. The adsorption capacity of KS was enhanced from 275 mg g–1 to 479 mg g–1 after NaOH treatment. The adsorbents were characterized using FTIR, SEM and XRF. Thermodynamics studies showed that the adsorption process was endothermic and adsorption kinetics for NaOH-KS followed the pseudo second order. Regeneration studies showed that NaOH-KS adsorbed CV even after five consecutive cycles. The NaOH-KS has strong adsorption and regenerating abilities coupled with fast kinetics, and is therefore a promising low-cost adsorbent for CV removal.