Method for preparing modified carbon composite adsorbent from carbon-containing polymer industrial wastes

The invention discloses a method for preparing a modified carbon composite adsorbent from carbon-containing polymer industrial waste, and relates to the technical field of polymer industrial waste recovery treatment. The preparation method comprises the following steps: directly carbonizing a carbon-containing polymer industrial waste product under the protection of inert gas, cleaning, drying, and carrying out activation pore-forming under the protection of nitrogen, thereby obtaining a carbon-containing polymer industrial waste product porous carbon material; dissolving a carbon-containing polymer industrial waste porous carbon material, magnesium oxide, ferric nitrate and manganous nitrate by using water and dilute nitric acid, uniformly stirring and mixing, and regulating the pH valueof the system by using an ammonia water solution; transferring the reaction solution into a microwave chemical reactor, starting a microwave function, and carrying out hydrothermal impregnation reaction; and closing the micro