1. Gdańsk University of Technology, Faculty of Chemistry, Department of Process Engineeringand Chemical Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
2. School of Chemical Engineering, Jimma Institute of Technology, Jimma University, Jimma,P.O. Box-378, Ethiopia
3. Gdańsk University of Technology, Faculty of Applied Physics and Mathematics, Institute ofNanotechnology and Materials Engineering, Narutowicza 11/12, 80-233 Gdańsk, Poland