Methyl red dye removal from aqueous solution by adsorption on rice hulls

الملخص EN

In this study agricultural waste, grounded rice hulls was examined as sorbent material to remove methyl red dye from aqueous solutions.

Batch studies were performed to evaluate the effects of various parameters : (contact time, pH, initial dye concentration, adsorbent dosage and particle size of adsorbent), on adsorption capacity of methyl red dye.

Rice hulls was found to be effective in removing methyl red dye and reached equilibrium in (100 min).

The adsorption capacity was found to be pH dependant and it increases with the increasing of the adsorbent dosage and initial concentration of methyl red dye.

The adsorption capacity decreases with increased particle size of rice hulls.

Equilibrium isotherms were analyzed by freundlich and Langmuir isotherm equations using correlation coefficients.

Adsorption data were well described by the Langmuir and freundlich models.

The results indicated that the rice hulls could be an alternative material in place of more costly adsorbents used for dye removal.