1. Laboratory
of Materials and
Environmental Sciences, Faculty of Sciences of Sfax, Soukra Road
km 4—B. P. no 802−3038, Sfax, Tunisia
2. Université de Toulouse, SIMAD, IUT Paul Sabatier, Avenue Georges Pompidou, 81104 Castres, France
3. Centre RAPSODEE, Université de Toulouse, Mines Albi, CNRS, Albi, France