1. Water Pollution Research Department, National Research Centre, 33 El Buhouth St, Dokki, 12622 Giza, Egypt
2. Physical Chemistry Department, National Research Centre, 33 El Buhouth St, Dokki, 12622 Giza, Egypt
3. Polymers and Pigments Department, National Research Centre, 33 El Buhouth St, Dokki, 12622 Giza, Egypt