1. Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University 1 , PMB 5025 Awka, Nigeria
2. Department of Chemical/Petrochemical Engineering, Rivers State University 2 , Nigeria
3. Department of Chemistry, University of Lagos 3 , Lagos, Nigeria
4. Department of Chemistry and Biochemistry, College of Art and Science, Texas Tech University 4 , Lubbock, Texas 79409, USA
5. Department of Chemical Engineering, University of Ilorin 5 , PMB 1515 Ilorin, Nigeria
6. Department of Chemical Engineering, College of Engineering and Technology, Landmark University 6 , Omu-aran, Nigeria