The e'ects of re-activation on the surface areas and pore volumes are shown in Table 1. The raw material, AC, has relatively high micropore surface area than other samples. But as the treating temperature increased, the ratio of Smi=SBET decreased gradually. In the case of AC800, microand meso surface areas as well as pore volumes were well developed, simultaneously. For the samples of AC900 and AC1000, the rapid declines of surface areas and pore volumes were observed, especially, in the micropore part.