Table 3.

Results of acidic liquid media enrichments with different electron donors for paired core and groundwater samples

Sample type and depth BLS (m)aResultbwith electron donorSample type and depth BLS (m)cResultbwith electron donor
FeSO4(S4O6)2−(S2O3)2−/(S4O6)2−S0FeSO4(S4O6)2−(S2O3)2−/(S4O6)2−S0
Core (attached)Groundwater (unattached)
  11.0  12.7+++
  17.7  18.6+++
  23.2  24.6+++
  29.9  30.6++ND
  36.3+  36.5++++
  41.8  39.5++ND
  47.2  48.4+++
  53.6+  54.4++++
  59.7  57.3++++
  66.1+  63.3++++
  72.2+  72.0++++
  78.9++  78.0+++
  84.1+  84.1+++
  90.5+  90.1++ND
  96.9+  96.0++++
 102.7+ 105.2+++
  • a Depth below land surface (BLS) indicates the depth of the 0.3-m core segment (of a 1.5-m core) that was processed.

  • b Positive (+) and negative (−) enrichments are indicated. ND, no data.

  • c Depth below land surface (BLS) was measured from the midpoint of the 3-m packed-off interval that was sampled.