1. Water Pollution Monitoring and Remediation Initiatives Research Group, School of Chemical and Minerals Engineering, Faculty of Engineering, North-West University, Potchefstroom 2531, South Africa
2. Department of Chemistry, School of Science and Technology, Cape Breton University, Sydney, NS B1P 6L2, Canada
3. Department of Metallurgy, Faculty of Engineering and Built Environment, University of Johannesburg, Doornfontein, Johannesburg 2028, South Africa
4. Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science Engineering and Technology (CSET), University of South Africa, Florida Science Campus, Johannesburg 1709, South Africa