TL is used as raw material and activation time is fixed at 60 min. As shown in Figure 7, the iodine value increases progressively with activation temperature, and then decreases when the temperature exceeded 600�C. At higher temperature, the pore walls between adjacent pores are probably destroyed and the micro-pores are destructed which led to the decrease in iodine value of activated carbon. Thus, it can be concluded that the optimum temperature for the production of activated carbons from TL is approximately 600�C.