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Swiss Journal of Geosciences

Table 4 Total amount of gases (in mmoles) present in Interval 2 after complete consumption of acetate (after 78 days) and in Interval 1 after pulse injection with H2 (after 78 days)

From: Impact of the electron donor on in situ microbial nitrate reduction in Opalinus Clay: results from the Mont Terri rock laboratory (Switzerland)

Gas species

Interval 1

Interval 2

In solution

In gas phase

N2

0.012

3.5

1.7

N2O

<0.2

<0.03

0.37

H2

5.5

1.1 × 103

n.a.

O2

<0.004

<0.6

n.a.

CO2

0.1

0.02

n.a.

  1. For Interval 1, the amount of gases present in solution and in the gas phase of the HEU is given. Due to the absence of a gas phase in Interval 2, the total amount of gases is only represented by the amount of dissolved gases in the interval solution
  2. n.a. not analyzed
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