Batch Pb2+ and Cu2+ removal by electric furnace slag

An evaluation of the application of electric furnace slag (EFS) as an adsor bent to remove Pb2+ and Cu-2 from industrial effluents is presented. The pa per examines phase composition or EFS X-ray diffraction of powder. In the b atch experiments, parameters studied include the effect of initial concentr ation of lead and copper ions, temperature, and contact time. Over the temp erature range studied (293-313 K) the results of adsorption experiments cou ld be Fitted by using both Langmuir and Freundlich models and thermodynamic values of DeltaG(0), DeltaH(0) and DeltaS(0) corresponding to each adsorpt ion process were calculated. Satisfactory conformity between experimental d ata and the model-predicted values was expressed by the correlation coeffic ient (R-2). Both Langmuir and Freundlich models described the Pb2+ and Cu2 sorption processes adequately, with correlation coefficient (R-2) values r anging from 0.9760 to 0.9994. Data from this study indicated the potential use of the tested electric furnace slag, a by-product from "Felis" foundry in Sisak, Croatia, as Pb2+ and Cu2+ sorbents front the industrial effluents . (C) 2001 Elsevier Science Ltd. All rights reserved.