▎ 摘　　要

NOVELTY - Biomass functional material comprises component A and component B form a basic biomass functional material through a chemical cross-linking reaction according to a mass ratio of 1:1-3:1. The component A powder contains 15-25.0% persimmon tannin extract prepared by using waste persimmon residue and green persimmon as raw material. Component B is biochar material or nitrogen-doped graphene material. The mass ratio of the basic biomass functional material and the C component ferric oxide nanoparticles is 3:1. The mass ratio of basic biomass functional material solution and each reagent is 10:1 with 98.0% cyclohexane, 1:1 with 99.5% isopropanol, 20:1 with 95.0% n-ethanol, and 1:1 with a polyacrylic acid chemical reagent. The mass ratio of glutaraldehyde with 25% of the crosslinking agent is 10:1. The crosslinking reaction is carried out to obtain the magnetic biomass functional material. USE - Biomass functional material for antibiotic adsorption. ADVANTAGE - The biomass functional material uses a variety of waste agricultural and forestry solid wastes as the main material and has low cost, green environmental protection, and good adsorption stability without secondary pollution. DETAILED DESCRIPTION - Biomass functional material comprises component A and component B form a basic biomass functional material through a chemical cross-linking reaction according to a mass ratio of 1:1-3:1. The component A powder contains 15-25.0% persimmon tannin extract prepared by using waste persimmon residue and green persimmon as raw material. Component B is biochar material or nitrogen-doped graphene material. The mass ratio of the basic biomass functional material and the C component ferric oxide nanoparticles is 3:1. The mass ratio of basic biomass functional material solution and each reagent is 10:1 with 98.0% cyclohexane, 1:1 with 99.5% isopropanol, 20:1 with 95.0% n-ethanol, and 1:1 with a polyacrylic acid chemical reagent. The mass ratio of glutaraldehyde with 25% of the crosslinking agent is 10:1. The crosslinking reaction is carried out to obtain the magnetic biomass functional material. The calcium carbonate and sodium alginate are provided in a mass ratio of 1:1. The volume ratio of the basic biomass functional material solution to 98.0% cyclohexane is 10:1, 97.0% glycerol is 20:1, 99.0% gluconolactone is 20:1, and 10:1 with crosslinker 25% glutaraldehyde. The cross-linking reaction is carried out to obtain the gel state biomass functional material. An INDEPENDENT CLAIM is included for a method for preparing biomass functional material, which involves dissolving component A materials in water to form a water-soluble system, dissolving the B component materials in water to make a water-soluble system, mixing the water-soluble system of component A and the water-soluble system of component B at a ratio of 1:1 by volume under stirring for 8-20 hours, adding the cross-linking agent to the mixed water-soluble system under stirring at 40℃ for 8 hours to form AB suspended solids system complex, washing the suspended aqueous solution of the AB complex with water and filter, and then vacuum drying and sieving to obtain the basic biomass functional material.