▎ 摘　　要

NOVELTY - Preparing modified biochar with enhanced adsorption of perfluorinated compounds, comprises ball milling, freeze-drying and shaping to prepare modified biochar precursor, finishing the waste biomass, removing the non-related impurities, taking the biomass and raw material and placing into a beaker, adding trivalent iron salt solution, mixing uniformly, placing into ball milling tank, adding agate ball in the ball milling tank, and filling nitrogen into the ball milling tank, sealing and placing in planetary ball mill, preparing modified biochar with enhanced adsorption of perfluorinated compounds, placing the freeze-dried iron-modified biochar precursor in an atmosphere furnace, using nitrogen as the protective gas, pre-heating to 450-500°C at a heating rate of 5-10°C/minutes and maintaining for 0.5-1 hour, leaching out of no residual iron-containing compounds in the washing liquid, and placing the black solid in a freeze dryer. USE - The modified biochar material is useful for removing perfluorinated compounds (claimed). ADVANTAGE - The modified biochar material promotes the transformation of carbonaceous compounds into graphene structure and improves the hydrophobic adsorption effect, improves the adsorption performance of biochar materials for perfluorinated compounds, solves the problem of low removal rate of short-chain perfluorinated compounds, has excellent material recycling performance, and can also be used for other organic pollution control. DETAILED DESCRIPTION - Preparing modified biochar with enhanced adsorption of perfluorinated compounds, comprises ball milling, freeze-drying and shaping to prepare modified biochar precursor, finishing the waste biomass, removing the non-related impurities, taking the biomass and raw material and placing into a beaker, adding trivalent iron salt solution, the mass ratio of iron element and biomass dry weight in the trivalent iron salt solution is 1:15-20, the ratio of trivalent iron salt solution volume (mL) and the biochar powder dry weight (g) is 10-20:1, mixing uniformly, placing into ball milling tank, adding agate ball in the ball milling tank, and filling nitrogen into the ball milling tank, sealing and placing in planetary ball mill, setting ball mill program as positive rotation, reversing alternately, ball milling to obtain the biomass-iron salt ball milling mixture, moving the biomass-iron salt ball milling mixture to the plastic bottle, using tinfoil paper for sealing, poking hole ventilating, placing in a freeze dryer at -30°C,freeze-drying at -50°C for 12-24 hours, removing excess water to obtain iron-modified biochar precursor, and drying for 12-24 hours, removing the redundant water to obtain the iron modified biochar precursor, and (ii) preparing modified biochar with enhanced adsorption of perfluorinated compounds, placing the freeze-dried iron-modified biochar precursor in an atmosphere furnace, using nitrogen as the protective gas, pre-heating to 450-500°C at a heating rate of 5-10°C/minutes and maintaining for 0.5-1 hour, heating to 900-1000°C for 1-2 hours, and finally cooling down naturally in a nitrogen atmosphere to obtain a black solid, washing multiple times with deionized water, leaching out of no residual iron-containing compounds in the washing liquid, and placing the black solid in a freeze dryer at -30 to -50°C for freeze-drying for 12-24 hours. An INDEPENDENT CLAIM is included for modified biochar material for enhanced adsorption of perfluorinated compounds.