▎ 摘　　要

NOVELTY - The preparation method of nanocomposite material involves weighing 30 pts. wt. modified nano-graphene oxide/manganese dioxide composite, 20 pts. wt. active tert-butylphenol amine resin, 30 pts. wt. sodium silicate, 8 pts. wt. diethylenetriamine, 3 pts. wt. deacetylated chitin, 4 pts. wt. polyacrylamide, 3 pts. wt. polydimethylsiloxane and 7 pts. wt. benzyldimethyldodecylammonium chloride and then stirring at 1000 rpm for 60 minutes, adding 7 pts. wt. gamma -methacryloxypropyltrimethoxysilane and 14 pts. wt. aluminum oxide powder to the mixture and then heating, washing using deionized water and grinding into 1500 mesh powder. USE - The method is useful for preparation of nanocomposite material, which is useful for adsorbing calcium and magnesium ions in water, processing sewage and removing toxic substances in water. ADVANTAGE - The method enables preparation of nanocomposite material with excellent adsorption effect in environmentally-friendly manner.