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Environmental Engineering Research 2001;6(4): 191-197.
AN INVESTIGATIVE STUDY ON PHOSPHOROUS REMOVAL PROCESS USING CONVERTER AND FURNACE SLAGS
Seunghwan Lee
School of Architectural, Civil and Environmental Engineering, Kumoh National University of Technology, Kumi 730-701, Korea
Corresponding Author: Seunghwan Lee ,Tel: +82-54-467-4240, Fax: +82-54-467-4050, Email: shlee@ait.ac.th
Received: September 11, 2000;  Accepted: August 11, 2001.
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ABSTRACT
Kinetic studies on phosphorus (P as orthophosphate) sorption onto converter and furnace slag (dust and cake, waste products from a steel industry) media revealed that P sorption is a slow process. More than 90% of P was adsorbed within 20 and 80 h for the dust and cake, respectively. Dust adsorbed P more than cake (about 4 times in terms of the amount of P adsorbed). Kinetics of P sorption was satisfactorily explained by a static, physical, non-equilibrium sorption model (SPNSM). Film transfer constants decreased with the increase of initial P concentration due to the limitations of sorptivity on the surface of the slags. The pH of the P solutions in the adsorbents gradually decreased after a rapid increase at the initial stage of P sorption.
Keywords: liquid and solid phase concentration | phosphorus removal | slag | sorption
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