The invention relates to a method in the technical field of environment protection, in particular to a micro-nano iron sulfide/porous carbon composite material, a preparation method thereof and seaweed biomass application. The preparation method includes : utilizing seaweed biomass to promote sulfate bio-reduction to generate iron sulfide to cover the surface of the seaweed biomass; carbonizing the seaweed biomass through mild hydrothermal reaction to generate a porous carbon material loaded with micro-nano biological iron sulfide. Various technical problems in the face of high-value utilization of the seaweed biomass can be effectively solved, early investment infrastructure expense is low, and a reactor can be quickly and emergently set up according to harvesting places and centralized harvesting and salving time of seaweed to prepare the micro-nano iron sulfide/porous carbon composite material. The micro-nano iron sulfide/porous carbon composite material prepared by the method can be applied in water pollution control, soil (sediment) improvement or polluted environment restoration.
; 武君; 骆永明
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