The application discloses a carbon-based
microbial agent for synchronously degrading halogenated organic compounds and passivating
heavy metals, and a preparation method and application thereof. The carbon-based
microbial agent comprises composite microorganisms and
biochar, the composite microorganisms comprise
chitin bacteria, bacillus,
achromobacter, methyl bacillus,
sphingomonas and
microbacterium, and the composite microorganisms are attached to the surface of the
biochar. The preparation method of the carbon-based
microbial agent is that six kinds of microbial strains are inoculated into culture media containing pollutants respectively, and after screening and
domestication, the carbon-based microbial agent is obtained by incubating the six kinds of microbial strains with the
biochar. The carbon-based microbial agent can synchronously degrade halogenated organic compounds and passivate
heavy metals, the degradation rate of BDE-47 in actual
electronic waste disassembly area composite contaminated soil can reach 89.60%, the degradation rate of PCB 180 can reach 94.99%, the
passivation rates of lead and
cadmium can reach 76.39% and 90.37% respectively, and the carbon-based microbial agent is suitable for heavy
metal-
organic compound composite contaminated site remediation.