1. Department of Chemistry, Research Unit of Noxious Chemistry and Environmental Engineering, Faculty of Science, University of Dschang, Dschang, Cameroon
2. Department of Process Engineering, Laboratory of Energy, Materials, Modeling and Method, National Higher Polytechnic School of Douala, University of Douala, Douala, Cameroon
3. Process Engineering Laboratory, Ucac-Icam Institute, Douala, Cameroon
4. Institute of Chemistry, Faculty of Process and Systems Engineering, Universität Platz 2, Magdeburg, Germany
5. Departement of Physical Sciences, Laboratoire Pluridisciplinaire des Sciences (LAPLUS) de l’Ecole Normale Supérieure (ENS-GABON), Libreville, Gabon
6. Department of Energy Engineering, Laboratory of Energy, Materials, Modeling and Method, National Higher Polytechnic School of Douala, University of Douala, Douala, Cameroon