▎ 摘　　要

NOVELTY - Preparing wastewater containing sulfur cyanide, comprises (i) dissolving ferrous sulfate heptahydrate in deionized water to obtain 30-60 g/l ferrous sulfate aqueous solution, (ii) adding 0.01-0.05 pts. wt. graphene and 100-150 pts. wt. deionized water to obtain graphene solution, (iii) adding ferrous sulfate aqueous solution into graphene solution for mixing in which volume ratio between ferrous sulfate aqueous solution and graphene solution is 1:4-1:10, after magnetic stirring for 0.5-3 hours, placing the mixed solution under microwave condition for 20-40 minutes, then cooling to below 60 ℃, and (iv) separating and drying the cooled solution, and then grinding to obtain final product. USE - The method is useful for treating wastewater containing sulfur cyanide (claimed). ADVANTAGE - The method reduces reaction temperature, shortens the processing time and improves processing effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for treating wastewater containing sulfur cyanide, comprising (a) adding certain amount of hydrogen peroxide and ferrous ion/graphene (Fe2+/GO) composite catalyst in waste water tank containing sulfur cyanide, Fe2+/GO composite catalyst adopts the method for preparing and treating sulfur-cyanide containing cyanide wastewater catalyst, and (b) adopting wastewater lifting pump to send the wastewater containing sulfur cyanide into microwave reactor, setting microwave condition to process the wastewater containing sulfur cyanide and removing the sulfur cyanide of wastewater.