1. Department of Integrated Science Education Federal College of Education (Technical) Akoka P. O. Box 269 Yaba Lagos 100001 Nigeria
2. Environmental Science and Technology Unit African Centre of Excellence for Water and Environment Research (ACEWATER) Redeemer's University PMB 230 Ede 232101 Nigeria
3. Department of Chemical Sciences Redeemer's University PMB 230 Ede 232101 Nigeria
4. Chair of Urban Water Systems Engineering Technical University of Munich (TUM) Am Coulombwall 3 85748 Garching Germany