1. Technical Institute of Babylon, Al-Furat Al-Awsat Technical University (ATU), Iraq.
2. Thi-qar oil company Iraq.
3. Department of Chemical and Environmental Engineering , Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
4. Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia.
5. Department of Chemical and Environmental Engineering , Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia