▎ 摘　　要

NOVELTY - Removing arsenic ion from water involves dispersing oxidized graphene in de-ionized water ultrasonically for 10-30 minutes. The obtained dispersion is stirred with dithiothreitol evenly to obtain mixed solution that is heated for 2 hours on water bath at 95 degrees C. The heated mixture is immersed in distilled water for 2-3 days. The immersed material is freeze-dried to obtain sulfur-doped graphene aerogel that is stirred with polyvinyl alcohol solution to obtain paste that is freeze-dried to obtain sulfur-doped graphene aerogel paper electrode. USE - Method for removing arsenic ion from water (claimed). ADVANTAGE - The method enables to remove arsenic ion from water that ensures simple preparation of sulfur-doped graphene aerogel, environmental protection, high arsenic ion adsorption efficiency, fast arsenic removal and simple operation. DETAILED DESCRIPTION - Removing arsenic ion from water involves dispersing oxidized graphene in de-ionized water ultrasonically for 10-30 minutes. The obtained dispersion is stirred with dithiothreitol evenly to obtain mixed solution that is heated for 2 hours on water bath at 95 degrees C. The heated mixture is immersed in distilled water for 2-3 days. The immersed material is freeze-dried to obtain sulfur-doped graphene aerogel that is stirred with polyvinyl alcohol solution to obtain paste that is freeze-dried to obtain sulfur-doped graphene aerogel paper electrode. The heavy metal arsenic ion solution is put in the electric absorption container with sulfur-doped graphene aerogel paper electrode to power heavy metal adsorption experiment that utilizes three-electrode system, such as paper electrode as working electrode, platinum electrode as counter electrode, and calomel electrode as reference electrode. The change of solution conductivity is monitored in real-time.