The samples used for
preparation of activated carbons are denoted by CA or TA for
chemical or thermal activation followed by 3 (30%), 4 (40%) or 5
(50%) for the concentrations of H3PO4 and ultimately by the heattreatment
temperatures of 500, 600, 700 and 800 C. The
impregnated samples were then dried at 120 C for 24 h to be
pyrolyzed in a horizontal tube furnace