▎ 摘　　要

NOVELTY - Electric filtration and sterilization of sulfate-reducing bacteria involves using a device comprising filter layer comprising filter element, cathode and anode from top to bottom. A hollow space is formed between the cathode and the filter element. The filter element is a graphene nanofiber nonwoven fabric. The preparation of the graphene nanofiber nonwoven fabric involves (i) ultrasonically dispersing graphene into N,N-dimethylformamide and dimethyl sulfoxide to obtain a graphene dispersion, (ii) blending the graphene dispersion with 0.2-0.5 g polyvinylidene fluoride having number average molecular weight of 80000-120000 with respect to 1 g graphene to obtain a blend under stirring conditions, and electrospinning the blend to prepare graphene nanofiber non-woven fabric. USE - Electric filtration and sterilization of sulfate-reducing bacteria used in environmental protection applications. ADVANTAGE - The method is simple, economical, environmentally-friendly, has high sterilization efficiency, and is harmless to human health. DETAILED DESCRIPTION - Electric filtration and sterilization of sulfate-reducing bacteria involves using a device comprising filter layer comprising filter element, cathode and anode from top to bottom. A hollow space is formed between the cathode and the filter element. The filter element is a graphene nanofiber nonwoven fabric. The preparation of the graphene nanofiber nonwoven fabric involves (i) ultrasonically dispersing graphene into N,N-dimethylformamide and dimethyl sulfoxide to obtain a graphene dispersion, (ii) blending the graphene dispersion with 0.2-0.5 g polyvinylidene fluoride having number average molecular weight of 80000-120000 with respect to 1 g graphene to obtain a blend under stirring conditions, and electrospinning the blend to prepare graphene nanofiber non-woven fabric. The electric filtration sterilization involves electrically connecting the cathode and the anode with a direct current stabilized current, and passing water containing sulfate-reducing bacteria through the cathode in the filter layer, passing through the anode and the hollow space formed between the cathode and the filter element for sterilization.