1. Department of Chemical Engineering, University of Technology, Baghdad, Iraq
2. Department of Civil Engineering, Al-Maaref University College, Ramadi, Iraq
3. National Chair of Materials Sciences and Metallurgy, University of Nizwa, Sultanate of Oman, Nizwa, Oman
4. Petroleum and Chemical Engineering Department, Sultan Qaboos University, Sultanate of Oman, Muscat;
5. University of Malaya Centre for Ionic Liquids, University of Malaya, Kuala Lumpur, Malaysia