The adsorption of Crystal violet from aqueous solution by using potato peels (Solanum tuberosum): Equilibrium and kinetic studies

The present study shows that the potato peel (pp) can be used as a potential agricultural by-product adsorbent for the removal of crystal violet (basic dye) from aqueous solution. the potato peel (pp) without any modification,was characterized by fourier transform infrared spectroscopy (ftir) and scanning electron microscopy (sem) coupled by edx. in batch optimization studies,the maximum removal efficiency was obtained at the optimum levels of contact time (20 min),adsorbent dose (0.5 g.l-1),initial dye concentration 20 mg.l-1and ph 6. the equilibrium adsorption data was found to follow the langmuir isotherm model and maximum monolayer capacity was found to be 555 mg.g-1. also the langmuir and freundlich isotherm models constants rl and n suggesting favorable adsorption of cv on the pp. kinetic analysis revealed that adsorption experimental data was best fitted by pseudo-second order model (r2=0.996). the results suggest that potato peel would be suitable for removing crystal violet from aqueous solution. © 2017,university of mohammed premier oujda morocco.