1. Central Metallurgical Research & Development Institute
2. Helwan
3. Egypt
4. Institut Européen des Membranes
5. UMR5635 CNRS-UM-ENSCM
6. Faculty of Science
7. Chemistry Department
8. Al-Azhar University
9. Nasar City
10. 34095 Montpellier Cedex 5
11. France