Abstract: With corncob as the raw material, activated charcoal absorbent was prepared. Its sorption capicities to three kinds of dye wastewater, namely methylene the blue, the alkalinity pinkish red and themethyl orange were studied. Effects of factors such as temperature, adsorption dosage adsorption time on adsorption were investigated. The results indicated that, on the conditions of the adsorption dosage 1 g, the adsorption time about 5 h, the temperature 70 ℃ corncob absorbent achieves the best adsorption effect to three kinds of dyes. Dynamic equation of the adsorption rate and the adsorption time showed the adsorption process has very good linear relation. Application of the corncob activated charcoal for processing dye wastewater has favorable development prospect.

Key words: corncob, adsorption, activated charcoal, dye waste water