1. Al-Furat Al-Awsat Technical University, Al-Najaf, Iraq
2. University Politehnica of Bucharest, Department of Chemical and Biochemical Engineering, Polizu 1, 011061 Bucharest, Romania; c)Romanian Academy, Calea Victoriei, 125, Bucharest, Romania
3. University Politehnica of Bucharest, Department of Chemical and Biochemical Engineering, Polizu 1, 011061 Bucharest, Romania