Pyrogenic Black Carbon Suppresses Microbial Methane Production by Serving as a Terminal Electron Acceptor.

ABSTRACT: Methane (CH₄) is the second most important greenhouse gas, 27 times as potent as CO₂ and responsible for >30% of the current anthropogenic warming. Globally, more than half of CH₄ is produced microbially through methanogenesis. Pyrogenic black carbon possesses a considerable electron storage capacity (ESC) and can be an electron donor or acceptor for abiotic and microbial redox transformation. Using wood-derived biochar as a model black carbon, we demonstrated that air-oxidized black carbon served as an electron acceptor to support anaerobic oxidation of organic substrates, thereby suppressing CH₄ production. Black carbon-respiring bacteria were immediately active and outcompeted methanogens. Significant CH₄ did not form until the bioa

SUBMITTER: Xin D 

PROVIDER: S-EPMC10720376 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature