“…Currently, the use of procedures has become broadly well-known in drinking water treatment, groundwater restoration, contaminant gas adsorbents [ 163 ], metal ion removal [ 164 ], catalyst support [ 165 ], volatile organic compounds (VOC) [ 166 ], and the handling of service water [ 154 ]. Similarly, activated carbon is being applied to an increasing amount of wastewater treatment, whether it is in the methodical treatment of specific sewage streams [ 167 ]. Figure 5 , represented the main application of activated carbon synthesized by phosphoric acid.…”