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Water Practice & Technology © IWA Publishing 2006 |
doi10.2166/wpt.2006.066
Biosorption characteristics of reactive dye onto dried activated sludge
Dong-Jin Ju1, Im-Gyu Byun1, Chang-Han Lee2, Gab-Hwan An2, Tae-Joo Park1
1Department of Environmental Engineering, Pusan National University, San 30, Jangjeun-dong, Keumjeung-gu, Pusan 609-735, South Korea
2Department of Environmental Engineering, Catholic University of Pusan, Bugog-dong, Keumjeung-gu, 609-757, South Korea
ABSTRACT
This study examined the removal of reactive dye onto dead cells in activated sludge collected from the municipal sewage treatment plant in Suyoung, Pusan. The biosorption of reactive dye from aqueous solutions using the activated sludge was studied using a batch system with respect to the initial pH, temperature, amount of adsorbent and the pre-treatment of the adsorbent. Both the Freundlich and Langmuir isotherm models could describe the adsorption equilibrium of the reactive dye onto the activated sludge with the Langmuir isotherm showing the best agreement. First- and second-order kinetic models were used to investigate the adsorption mechanism. The adsorption capacity of Rhodamine-B(Rh-B) onto the activated sludge increased with decreasing initial pH and temperature.
Keywords: Biosorption, dried activated sludge, Rhodamine-B, kinetic
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