1. Africa Centre of Excellence for Water Management, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
2. Department of Environmental Engineering and Management, College of Earth Sciences and Engineering, The University of Dodoma, Dodoma, Tanzania
3. Department of Chemistry, Addis Ababa University, Addis Ababa, Ethiopia
4. School of Chemical and Bioengineering, Addis Ababa University, Addis Ababa, Ethiopia