▎ 摘　　要

NOVELTY - Mercury ion contaminated water body repair material comprises a graphene-supported particulate material composed of platinum atom-doped aluminum oxide and zinc oxide having a particle diameter of not greater than 4 mm; the each component comprises 0.5-1 wt.% platinum, 4-6 wt.% aluminum oxide, 5-8 wt.% zinc oxide, and 85-90 wt.% carbon. The preparation of mercury ion contaminated water body repair material comprises e.g. (1) using the natural graphite, slowly adding to the fuming sulfuric acid at 35 degrees C under continuous stirring, and stirring the mixture at a constant temperature for 2 hours, then adding potassium permanganate aqueous solution, and heating to temperature of 50-55 degrees C and continuously stirring, slowly adding hydrogen peroxide aqueous solution until there is no bubble, keeping the temperature and stirring, suction filtering, washing the filtrate to neutrality; and (2) co-dissolving aluminum salt and zinc salt in aqueous solution of nitric acid, adding isocitric acid, and stirring. USE - Used as mercury ion contaminated water body repair material. DETAILED DESCRIPTION - Mercury ion contaminated water body repair material comprises a graphene-supported particulate material composed of platinum atom-doped aluminum oxide and zinc oxide having a particle diameter of not greater than 4 mm; the each component comprises 0.5-1 wt.% platinum, 4-6 wt.% aluminum oxide, 5-8 wt.% zinc oxide, and 85-90 wt.% carbon. The preparation of mercury ion contaminated water body repair material comprises (1) using the natural graphite, slowly adding to the fuming sulfuric acid at 35 degrees C under continuous stirring, and stirring the mixture at a constant temperature for 2 hours, then adding potassium permanganate aqueous solution having a mass fraction of 20%, and heating to temperature of 50-55 degrees C and continuously stirring for 2 hours, slowly adding 24% hydrogen peroxide aqueous solution until there is no bubble, keeping the temperature and stirring for 1-2 hours, suction filtering, washing the filtrate to neutrality to obtain graphene oxide; (2) using the aluminum salt and the zinc salt which are easily soluble in the acidic aqueous solution are co-dissolving in a 15-20% aqueous solution of nitric acid, adding the isocitric acid, and stirring the mixture at a constant temperature of 50 degrees C for 1-2 hours, and then adding glucose and chloroplatinic acid, stirring at 95-100 degrees C for 3-4 hours, keeping the temperature, adding to the agar powder and continuously stirring until dissolved, naturally cooling to form a gel, drying the gel in an oven at 110 degrees C, then placing in a box type electric resistance furnace, heating to the temperature of 370-380 degrees C at a rate of not greater than 3 degrees C/minute, and keeping the temperature for 6-8 hours, and cooling to obtain the powder material composed of aluminum oxide and zinc oxide doped with platinum atoms; and (3) adding the powder material to aqueous solution of hydrazine hydrate having a mass fraction of 20% under continuous stirring, and then further adding the aforementioned graphene oxide, and heating to the temperature of 40 degrees C, and then stirring the mixture at a constant temperature for 4-5 hours, washing for 3 times with deionized water, extruding into pellets on a molding apparatus, and then drying in a vacuum oven at 60 degrees C to obtain a graphene-supported particulate material composed of platinum atom-doped aluminum oxide and zinc oxide.