▎ 摘　　要

NOVELTY - Preparing porous aerogel composite material involves reacting graphene oxide with a modification assistant to obtain pre-modified graphene oxide. The cyclodextrin is grafted onto the pre-modified graphene oxide to obtain the cyclodextrin-modified graphene oxide. The anionic modified hyperbranched polymer, cyclodextrin modified graphene oxide and sodium alginate are mixed to prepare a sol. The sol and calcium ions are cross-linked and solidified to obtain a gel, and then freeze-dried the gel to obtain a porous aerogel composite material. USE - Method for preparing porous aerogel composite material. ADVANTAGE - The method enables to prepare porous aerogel composite material has good mechanical properties, realizes induced transfer and adsorption of heavy metal ions through the hyperbranched polymer of polyanion, and also realizes efficient adsorption and recycling of heavy metal ions.