Removal of Methylene Blue from Dye Wastewater Using River Sand by Adsorption

摘要

Removal of methylene blue (MB) from aqueous solutions by river sand using batch and column techniqueswas investigated. It was observed that the maximum removal of MB was achieved at pH 4, 45 minutescontact time and 500 g/L dosage adsorbent river sand. Adsorption data were better fitted to the Langmuirisotherm. Pseudo second-order kinetics was most suitable to explain the kinetic study. The removal ofmethylene blue by column adsorption of river sand was ranged between 29.01% and 99.99%. It was foundthat the adsorption of methylene blue by river sand was more conformed to the model Thomas. In differentflow rates study, flow rate of 10 mL/min in the column adsorption can better remove the methylene blue. Thisstudy shows that the river sand cannot undergo desorption.