▎ 摘　　要

NOVELTY - A magnetic oxidized graphene wastewater treatment agent (I) comprises nano-magnetic iron oxide modified with organosiloxane by silicon-oxygen bond, and graphene oxide connected with the organosiloxane by a carbon-nitrogen bond. USE - Magnetic oxidized graphene wastewater treatment agent for adsorbing heavy metal ions e.g. divalent lead, hexavalent chromium and divalent copper in industrial wastewater. ADVANTAGE - The magnetic oxidized graphene wastewater treatment agent rapidly captures and adsorbs heavy metal ions in the sewage, and has excellent selectivity and high adsorption property. DETAILED DESCRIPTION - A magnetic oxidized graphene wastewater treatment agent comprises nano-magnetic iron oxide modified with organosiloxane by silicon-oxygen bond, and graphene oxide connected with the organosiloxane by a carbon-nitrogen bond. The magnetic oxidized graphene wastewater treatment agent is of formula (I). An INDEPENDENT CLAIM is included for preparation of magnetic oxidized graphene wastewater treatment agent, which involves adding 1 pt. wt. nano-iron oxide to 50 pts. wt. 0.05-0.1 mol hydrochloric acid solution, ultrasonically processing for 20-60 minutes, filtering, washing the nano-magnetic iron oxide with deionized water until there is no chloride ions to obtain a nano-magnetic iron oxide , adding 100 pts. wt. ethanol, 5-20 pts. wt. deionized water, 2.0 pts. wt. 30% aqueous ammonia, 0.2 pt. wt. orthosilicate or methyl orthosilicate, stirring at 25-35 degrees C for 6-12 hours, adding 0.1 pt. wt. siloxane coupling agent, stirring continuously, heat-preserving for 6-12 hours, filtering, washing with deionized water and vacuum-drying at 50 degrees C for 12 hours to obtain a modified nano-magnetic iron oxide , adding 100 pts. wt. graphene oxide to a container containing 500 pts. wt. ethanol, ultrasonically dispersing for 10-60 minutes, adding 5-10 pts. wt. modified nano-magnetic iron oxide , stirring at 40-60 degrees C for 3-6 hours, filtering, washing with deionized water and vacuum-drying at 50 degrees C for 12 hours.