▎ 摘　　要

NOVELTY - Tourmaline/graft modified sulfur reducing-graphene oxide composite adsorbent comprises 1-25% tourmaline, 5-70% graphene oxide, 5-94% sodium polysulfide and hydrazine hydrate as a reducing agent. The mass ratio of graphene oxide and hydrazine hydrate is 1:0.5-1:4. USE - The adsorbent is useful for adsorption of oil, benzene, salad oil, fatty acid and organic substances, which are not easily soluble in water, and heavy metal ions. ADVANTAGE - The adsorbent: has high adsorption efficiency for a variety of contaminants; has high hydrophobicity, thus enabling quick adsorption of oil, benzene, salad oil, fatty acid and organic substances, which are not easily soluble in water with low dosage. The method is simple; utilizes easily available raw materials, and is environmentally friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the adsorbent, comprising (a) adding graphene oxide into aqueous alcohol solution, ultrasonically dispersing for 1-3 hours to obtain graphene oxide suspension, where each liter of water is added with 0.5-7 g graphene oxide, and the volume ratio of water and ethanol in the aqueous alcohol solution is 1:1, (b) introducing the graphene oxide suspension into a reactor, adding tourmaline powder, stirring, heating, carrying out reflux reaction for 2 hours, where each liter of water is added with 0.1-2.5 g tourmaline powder, (c) adding sodium sulfide (Na2Sx) into the reactor, adding formic acid solution in a dropwise manner for 10-20 minutes, stirring to react for 2 hours, where each liter of water is added with 0.5-9.4 g sodium sulfide, adding 1 l formic acid solution in a drop wise manner, (d) continuously adding hydrazine hydrate into the reactor, reacting for 24 hours, where each 1-2 g graphene oxide is added with 1-4 g hydrazine hydrate, and (e) filtering, cleaning, drying and grinding. x = 2-6.