TABLE 4.

Growth pH range and Fe(II) formation assay results for five selected isolates

Genus, strainGrowth pH range (optimal growth pH)aSchwertmannitebGoethiteb
pH on day:Amt of Fe(II) (mM) on day 22pH on day:Amt of Fe(II) (mM) on day 22
022022
Acidobacteria sp.
    YE3-D1-202.5-5.0 (3.5)3.0 ± 0.04.0 ± 0.23.1 ± 0.33.2 ± 0.23.2 ± 0.10.6 ± 0.3
Alicyclobacillus spp.
    FeSo-D4-20-CH1.5-6.0 (3.5)3.0 ± 0.03.6 ± 0.62.4 ± 1.63.1 ± 0.22.9 ± 0.20.1 ± 0.1
    YE4-D4-4i-CH2.5-5.0 (3.5)3.0 ± 0.13.9 ± 0.13.6 ± 0.03.0 ± 0.03.0 ± 0.10.9 ± 0.2
Acidocella sp.
    YE4-N1-5-CH2.5-4 (2.5)3.0 ± 0.03.6 ± 0.42.6 ± 0.83.2 ± 0.23.1 ± 0.20.7 ± 0.2
Unknown Dyella-like genus sp.
    YE3-D1-10-CH2.0-5.0 (3.5)3.0 ± 0.04.0 ± 0.13.6 ± 0.63.3 ± 0.13.3 ± 0.20.8 ± 0.1
Control3.1 ± 0.02.8 ± 0.00.1 ± 0.13.1 ± 0.03.0 ± 0.00.1 ± 0.1
  • a Tested in the YE media under oxic conditions without the presence of Fe(III) minerals.

  • b Tested in the YE media under microoxic conditions.