1. Department of Pure and Applied Chemistry, University of Fort Hare, Alice, South Africa
2. Department of Chemistry, Kogi State University, Anyigba, Nigeria
3. SAMRC Microbial Water Quality Monitoring Center, University of Fort Hare, Eastern Cape, South Africa
4. Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa