▎ 摘　　要

NOVELTY - Diethylenetriamine pentaacetic acid-modified magnetic graphene oxide composite material, is claimed. The preparation of the diethylenetriamine pentaacetic acid-modified magnetic graphene oxide composite material comprises e.g. (1) adding graphite powder, potassium persulfate , phosphorus pentoxide and sulfuric acid into the triangular flask, stirring in water bath kettle, cooling to the room temperature, adding ultrapure water to dilute, and allowing to stand; pouring out supernate, filtering the mixture and washing with deionized water until the mixture is neutral, and drying. USE - The composite material is useful for treating tetracycline, ciprofloxacin single and compound polluted wastewater (claimed). ADVANTAGE - The composite material: is simple to prepare with low cost, provides new way antibiotic pollution in wastewater; and used as a new type of adsorbent to promote antibiotic pollution treatment. DETAILED DESCRIPTION - Diethylenetriamine pentaacetic acid-modified magnetic graphene oxide composite material, is claimed. The preparation of the diethylenetriamine pentaacetic acid-modified magnetic graphene oxide composite material comprises (1) adding 5-6 g graphite powder, 4-6 g potassium persulfate , 4-6 g phosphorus pentoxide and 20-30 ml sulfuric acid (98%) into the 1 l triangular flask, stirring for 4-6 hours in water bath kettle at 70-100 degrees C, cooling to the room temperature, adding 0.5-2 l ultrapure water to dilute, and allowing to stand for overnight; pouring out supernate, filtering the mixture and washing with deionized water until the mixture is neutral, drying at 50-60 degrees C to obtain the pre-oxidized graphite, adding pre-oxidized graphite to conical flask, adding 200-260 ml sulfuric acid (98%) solution, adding 4-6 g sodium nitrate and 25-35 g potassium permanganate with stirring, (the potassium permanganate spoon is slowly added to the mixed solution), stirring and reacting in an ice bath for 3-6 hours, heating to 30-40 degrees C, reacting for 1-2.5 hours, slowly adding 400-700 ml ultrapure water with dropping bottle, reacting at 90-100 degrees C for 1-2 hours, cooling the mixed solution to room temperature, diluting with 1-2 l deionized water, adding 30-50 ml Hydrogen peroxide (30%), reacting for 1.5-2.5 hours, washing resulting mixture with 5-20% hydrochloric acid, washing with plenty of water until neutral, adding water to constant volume, carrying ultrasonic dispersion at 25-60 degrees C for 2-4 hours to obtain graphene oxide aqueous suspension; (2) adding 180-220 ml ferric chloride (0.1 mol/l) and 0.05 mol/l ferrous sulfate mixed solution into 180-220 ml graphene oxide (3-10 mg/ml), heating and stirring in water bath at 80-90 degrees C for 1-5 minutes, adding 100-200 ml aqueous ammonia, stirring for 30-60 minutes, and magnetically separating and washing it to neutral; (3) adding 0.1-0.5 g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and 0.1-0.5 g N-hydroxysuccinimide (NHS) into aqueous solution 0.2-0.6 g diethylenetriamine pentaacetic acid (ammonia solution), continuously stirring at room temperature for 1-3 hours, adding 10-30 ml diethylene triamine and magnetic graphene oxide obtained by the above steps, continuously stirring the mixed solution in a water bath at 60-90 degrees C for 4-8 hours, cooling to room temperature, washing with deionized water to neutral. An INDEPENDENT CLAIM is also included for the diethylenetriamine pentaacetic acid-modified magnetic graphene oxide composite material useful for treating tetracycline, ciprofloxacin single and compound polluted wastewater.