J. S. YADAV, M. SONI AND L. S. THAKUR
Abstract
Adsorption of crystal violet (CV) dye on water hyacinth root powder (WHRP) has been investigated as a function of solution pH, adsorbent dose, initial concentration and treatment time in batch reactor. A low cost natural adsorbent WHRP was used for the removal of CV. The optimized parameters were found to be pH: 7, adsorbent dose: 10 g/L, initial concentration: 20 mg/L, and treatment time: 160 min. At these optimum conditions 90% removal of CV was observed. The maximum adsorption capacity of CV was found to be 8.40 mg/g. Freundlich isotherm suitably fitted to equilibrium data. Adsorption kinetic facts are satisfactorily represented by the pseudo-second order kinetic model. The results of experimental study showed that WHRP an outstanding adsorbent for the removal of CV from wastewater.