PPT Slide

Using [H2] for evaluation of active redox processes

• H2 is an important intermediate in the degradation of organic matter, with high turn-over rate and is also produced from geochemical sources:

• H2 can be oxidized by oxidative microorganisms like methanogens, sulfate-reducers and iron-reducers:

• Occurrence of Terminal Electron Accepting Processes (TEAPs) can be evaluated performing thermodynamic calculations:

• A TEAP will only occur when the Gibbs free energy for the reaction is below a minimum threshold value (-7 to -20 kJ/mol H2)

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