▎ 摘　　要

NOVELTY - A graphene-supported zero-valent iron nanocomposite material is prepared by diluting 95-102 mg graphene oxide into 100 ml deionized water, ultrasonically treating for 25-32 minutes, adding 50 ml of 55-60 mg aqueous ferric chloride solution, stirring for 11-13 hours to dissolve, washing sample with deionized water, filtering to obtain ferric ion-in-graphene oxide, drying into oven under vacuum condition, placing 50-52 mg ferric ion-in-graphene oxide into plasma discharge chamber, adjusting parameter to produce hydrogen gas and argon mixed plasma stream, and discharging. USE - Preparation of graphene-supported zero-valent iron nanocomposite material for removal of heavy metal in contaminated water. ADVANTAGE - Process is environment-friendly and simple and has reduced cost and short preparation period, and product has improved recycling rate. DETAILED DESCRIPTION - A graphene-supported zero-valent iron nanocomposite material is prepared by diluting 95-102 mg graphene oxide (GO) into 100 ml deionized water, ultrasonically treating for 25-32 minutes, adding 50 ml of 55-60 mg aqueous ferric chloride (FeCl3) solution, stirring for 11-13 hours to dissolve, washing sample with deionized water, filtering to obtain ferric ion-in-graphene oxide (Fe3+/GO), drying into oven under vacuum condition, placing 50-52 mg Fe3+/GO into plasma discharge chamber, adjusting parameter to produce hydrogen gas (H2) and argon (Ar) mixed plasma stream, and discharging in which mixed plasma stream is directly above of sample. An INDEPENDENT CLAIM is included for recycling graphene-supported zero-valent iron nanocomposite material which involves adding simulated wastewater containing different concentrations of chromium(VI) (Cr(VI)) into graphene-supported zero-valent iron nanocomposite material, shaking at constant temperature for 23-24 hours, adsorbing, separating solid phase and liquid phase using magnet, testing supernatant into spectrophotometry, calculating removal rate of Cr(VI) concentration, dissolving solid phase into 50 mg/L EDTA-disodium (EDTA-2Na) solution to remove adsorbed Cr(VI), centrifugally drying, putting into plasma discharge chamber, adjusting parameter to produce H2 and Ar mixed plasma stream, and discharging in which mixed plasma stream is directly above of nanocomposite material, and nanocomposite material is re-used in wastewater containing Cr(VI). DESCRIPTION OF DRAWING(S) - The drawing shows a transmission electron microscope (TEM) image of graphene-supported zero-valent iron nanocomposite material.