1. Department of Process Engineering, Laboratory of Chemical Engineering and Industrial Bio-Processes, National Higher Polytechnic School of Douala, University of Douala, Douala, Cameroon
2. Department of Chemistry, Research Unit of Noxious Chemistry and Environmental Engineering, Faculty of Science, University of Dschang, Dschang, Cameroon
3. Institute of Chemistry, Faculty of Process and Systems Engineering, Universität Platz 2, Magdeburg, Germany
4. Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, India