▎ 摘　　要

NOVELTY - Preparing porous alginate-graphene nanocomposite gel bead comprises (i) adding graphene oxide, sodium alginate and divalent metal carbonate into water and ultrasonic stirring to obtain homogeneous solution, where the concentration of graphene oxide is 0.1-20 mg/ml, the concentration of sodium alginate is 1-20 mg/ml and the concentration of divalent metal carbonate is 0.01-20 mg/l; and (ii) dropping the mixed solution into acidic solution and controlling temperature at 18-100 degrees C. USE - The method is useful for preparing porous alginate-graphene nanocomposite gel bead (claimed). ADVANTAGE - The gel bead has specific surface area and adsorption properties, and has enhanced performance with increased divalent metal carbonate content.