NAGRA Opalinus Clay (…002 - Version 1
FEP 6.2.4 Chemical evolution - redox​

In the absence of dissolved oxygen (which will be rapidly consumed by reaction with metallic materials and, possibly, organic material in the waste), near-field redox conditions will be determined by the equilibrium between the iron in the system and all its corrosion products but may be influenced by radiolysis (see 2.3/2.05) or by nitrate present in the waste. In the very long-term, the Eh will tend towards that of the infiltrating groundwater.