▎ 摘　　要

NOVELTY - Preparation of magnetic lignin graphene oxide composite aerogel involves (1) dissolving modified lignin in resorcinol solution, adding nano ferroferric oxide and graphene oxide and ultrasonically processing, adding formaldehyde solution and stirring evenly, adding catalyst, ultrasonically dispersing, stirring to dissolve to obtain composite sol, (2) placing the composite sol in a closed container, performing solution gel reaction under high temperature water bath conditions to obtain initial gel material, (3) aging treatment on the initial gel material, placing the gel in a closed container, soaking in solvent for solvent exchange, obtaining fully aged gel material, and (4) drying the gel. The modified lignin is extracted from wood chips using p-toluenesulfonic acid. USE - Preparation of magnetic lignin graphene oxide composite aerogel used in preparation of adsorbents for heavy metal ions or organic molecular pollutants (claimed). ADVANTAGE - The method is economical, and retains high specific surface area, light weight and high adsorption of phenolic aerogel, and enhances its network structure, and improves brittleness of phenolic aerogel. The magnetic lignin graphene oxide composite aerogel has high surface activity, high strength and high porosity, and is easily biodegradable and easy separate and absorb by magnets.