▎ 摘　　要

NOVELTY - Preparing modified pyrite involves subjecting to surface treatment of pyrite with epoxy silane coupling agent to obtain epoxidized pyrite. The graphene oxide is treated with an amino-containing silane coupling agent to obtain aminated graphene, adding 1 pts. wt. aminated graphene obtained to 500-10000 pts. wt. tetrahydrofuran, ultrasonically dispersing, adding 10-500 pts. wt. poxidized pyrite, ultrasonically dispersing, heating up the reaction system to slightly reflux, reacting for 1-2 hours, adding 0.5-5 pts. wt. amino anthraquinone compound, carbodiimide and N-hydroxysuccinimide, continue to react for 5-10 hours under slight reflux, adding 3-8 pts. wt. reducing agent, continue to react for 5-10 hours, filtering the solid, washing for three times with absolute ethanol, and drying to obtain product. USE - Method for preparing modified pyrite used in sewage treatment (claimed). ADVANTAGE - The method has good degradation promoting effect.