Structure and adsorption performance of sludge-based porous carbon materials modified by KHCO3

Sewage sludge-based porous carbon (SSPC) materials for removing 4-chlorophenol from aqueous solution were prepared by pyrolysis using sewage sludge (SS) as raw material and KHCO3 as modifier. According to the analytical data, SSPC materials have a well-developed pore nested structure on the surface, resulting in a high specific surface area (up to 1585.8 m2/g). In addition, the impact of preparation temperature on the properties of SSPC and the adsorption performance of 4-chlorophenol was studied. SSPC-800 (prepared at 800 °C) has the highest adsorption capacity for 4-chlorophenol, 321.21 mg/g, which is 5.5 times of the adsorption capacity of SSC-800 (without the modification by KHCO3).