... by using powdered activated carbon augmented activatedsludge in landfill leachate. Halim et al. [7] studied a comparison study of ammonia and COD adsorption on zeolite, activated carbon and ... prepared activated carbon. The activated carbon development porosity is associated with gasification reaction. Figures 5 (a) and (b), respectively shows the SEM images of the precursor and the DP activated ... The DP activated carbon prepared demonstrated high surface area and well-developed porosity. According to this study, DP activated carbon can be utilized as the replacement of commercial activated...