Metal/sulfur-persulfate loaded biochar composite material as well as preparation and application thereof

The invention discloses a metal/sulfur-persulfate loaded biochar composite material as well as preparation and application thereof. The composite material is prepared by taking biochar as a carrier and loading metal, sulfur and persulfate through dipping and pyrolysis curing methods; according to the method, thiosulfate and ammonium persulfate are subjected to a reduction reaction under the alkaline condition, metal/S is loaded to a blocky biomass material through an impregnation method and cured through pyrolysis, meanwhile, a vaporific persulfate aqueous solution is sprayed, and then persulfate is fixed to the composite material through low-temperature drying; the metal/S-persulfate loaded biochar composite material is prepared by fully utilizing the adsorption effect of biochar, the preparation process is simple, the price is low, the efficiency is high, the activity is only reduced by 5-10% after the biochar composite material is continuously used for 10 hours, organic waste gas containing methylbenzene,