▎ 摘　　要

NOVELTY - Preparing germ cellulose/graphene oxide nano-composite ball absorbing material comprises e.g. taking glucose, peptone, yeast extract, agar, citric acid and potassium dihydrogen phosphate, dissolving, mixing, sterilizing to obtain the liquid culture medium, adding in 250 ml conical bottle, adding graphene oxide aqueous solution in bottle, mixing, inoculating Acetobacter xylinum strain, rotary oscillating, secreting Acetobacter xylinum cellulose, dispersing, forming spherical three-dimensional network germ cellulose/graphene nano-composite material ball. USE - The method is useful for preparing germ cellulose/graphene oxide nano-composite ball absorbing material (claimed). ADVANTAGE - The material has large surface area, is environmentally friendly, is economical, abd can absorb uranyl ion, strontium ion, radionuclide, and heavy metal ion in industrial waste water, thus exhibiting good absorbing property. DETAILED DESCRIPTION - Preparing germ cellulose/graphene oxide nano-composite ball absorbing material comprises (a) taking 100 ml liquid culture medium containing 5-6 g glucose, 0.5-0.6 g peptone, 0.7-0.9 g yeast extract, 2-3 g agar, 0.5-1.4 g citric acid, and 0.1-0.5 g potassium dihydrogen phosphate, taking each component raw material, dissolving, mixing uniform and adjusting pH to 5-7, pressure at 103.4 KPa vapor pressure, temperature at 121.3 degrees C, sterilizing for 15-20 minutes to obtain the liquid culture medium, taking 250 ml conical bottle, adding 125 ml liquid medium in conical bottle, (b) adding 1-10 ml graphene oxide aqueous solution in liquid culture medium containing conical bottle, mixing evenly, then inoculating Acetobacter xylinum strain, at 4-35 degrees C, 80-200 revolutions/minute, rotary oscillating under culture condition, secreting Acetobacter xylinum cellulose, dispersing graphene oxide attached to the surface in the liquid culture medium, winding cellulose, forming spherical three-dimensional network germ cellulose/graphene nano-composite material ball, the graphene oxide aqueous solution concentration is 1 ml graphene oxide aqueous solution containing 1 mg graphene oxide, and (c) taking out nano-composite material, using aqueous solution of potassium hydroxide to boil for 20-30 minutes, filtering, washing filtered solid material with deionized water until pH value is 6.8-8.2, at 40-50 degrees C, in the vacuum degree of 1.3-13 Pa condition, freezing and drying for 48-72 hour to obtain germ cellulose/graphene oxide nano-composite ball absorbing material.