1National Research Centre 2National Research Centre 3Mansoura University
oC followed by gasification with steam at950oC to burn-of’s=17, 32, 49 and 65%. The textural parameters of these activated carbons were determined from nitrogenadsorption results at 77 K. The total pore volume and the mean pore radius increased with the increase of % burn-of whereasthe surface area increased with the increase of burn- off from 17 to 32 and further to 49%. Further increase of burn-off to 65%was associated with a considerable decrease in surface area as a result of pronounced pore widening due to pore erosion. Thesurface pH values of the carbons investigated range between 7.1 and 8.2. The adsorption of oxamyl onto the activated carbonadsorption of oxamyl proved to be of the physical type and took place in non-micropores. The amount of oxamyl adsorbedexpressed as qm depends to a large extent to the surface area located in non-micropores S.n, where a straight line relationshippassing through the origin was obtained.