▎ 摘　　要

NOVELTY - A graphite oxide is processed into graphene oxide, then oxalic acid solution is added, filtered, washed, and vacuum-dried at low temperature, to obtain three-dimensional porous graphene. A magnesium-aluminum solution is prepared, three-dimensional porous graphene is then soaked in the magnesium-aluminum solution, and vacuum-dried. A carbon source in weak alkali solution is added, mixed, aged, filtered, washed, and sintered at high temperature, to obtain three-dimensional porous graphene-loaded nanomagnesium-aluminum hydrotalcite. USE - Preparation of three-dimensional porous graphene-loaded nanomagnesium-aluminum hydrotalcite used as defluorinating agent for wastewater treatment. ADVANTAGE - The method enables preparation of three-dimensional porous graphene-loaded nanomagnesium-aluminum hydrotalcite with large specific surface area.