1. Nanotechnology and Water Sustainability Research Unit, College of Science, Engineering and TechnologyUniversity of South Africa Johannesburg South Africa
2. Particle and Interfacial Technology Group, Department of Green Chemistry and TechnologyGhent University Ghent Belgium
3. Facultad del Mary Medio AmbienteUniversidad del Pacifico Guayaquil Ecuador
4. DST/MINTEK Nanotechnology Innovation Centre Johannesburg South Africa