1. Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, P.O.B. 91, Hungary
2. Chemical Engineering Department, National Research Centre, 33 El Buhouth Street, 12622 Cairo, Egypt
3. Laboratory of Nuclear Chemistry, Eötvös Loránd University/HAS Chemical Research Center, P.O. Box 32, H-1518, Budapest 112, Hungary
4. Institute of Chemistry, University of Miskolc, H-3515 Miskolc, Hungary