• adsorption;
  • kinetics;
  • Sagaun sawdust;
  • crystal violet dye wastewater;
  • Langmuir constants


Removal of dye crystal violet from wastewater by a low-cost abundantly available adsorbent was investigated. By varying the parameters such as agitation time, dye concentration, adsorbent dose, pH and temperature, potential feasibility for the removal of crystal violet by Sagaun sawdust was explored. The adsorption efficiencies were found to be pH dependent. A greater percentage of dye was removed with a decrease in the initial concentration of dye and increase in the amount of adsorbent. Characterization of the adsorbent by infrared spectroscopy was undertaken. Kinetic study showed that the adsorption of dye on sawdust was a gradual process. The equilibrium adsorption capacity of adsorbent for dye removal was measured which followed Langmuir isotherm. The dimensionless factor, RL revealed that the adsorption process is favorable in nature. © 2011 American Institute of Chemical Engineers Environ Prog, 2011