31Mar 2017 EFFECT OF SYNTHESIS CONDITIONS OF CARBON XEROGELS ON THEIR SURFACE CHEMISTRY, PORE TEXTURE AND METHYLENE BLUE ADSORPTION CAPACITY. Maher M. Girgis , Rabei M. Gabr , Ahmed M. El-Awad and Mahmoud K. Hussien. Chemistry Department, Faculty of Science, Assiut University, Assiut 71515, Egypt.