1. School of Computing, Engineering & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK
2. Institute for Materials and Processes (IMP), School of Engineering, The University of Edinburgh, The King's Buildings, Edinburgh, EH9 3FB, UK
3. Analytical/Material Chemistry Laboratory, Department of Pure and Applied Chemistry, Faculty of Natural and Applied Sciences, Veritas University, P. O. Box 6523, Garki, Abuja, Nigeria
4. Department of Pure and Applied Chemistry, Ladoke Akintola University of Technology, P. M. B. 4000, Ogbomoso, Oyo State, Nigeria
5. Department of Chemical Engineering, Federal University of Technology, Minna, Nigeria
6. School of Engineering, University of Aberdeen, Scotland, UK
7. School of Biotechnology and DCU Water Institute, Dublin City University, Glasnevin, Dublin, Ireland
8. St. Peter's College Muenster, Saskatchewan, Canada