Table 4.

Transformation of nitrate-N (10 mM) and sulfide-S (0.5 to 3.0 mM) during sulfide oxidation by strains CVO and FWKO B

Initial HS (mM)ΔHS(mM)ΔSSCa(mM)ΔSO42− (mM)S0(mM)ΔSd(mM)ΔNO3(mM)ΔNO2(mM)ΔNe (mM)
Strain CVO
 0.5−0.5 ± 0.0b 0.5 ± 0.000.3 ± 0.120.04 ± 0.04−0.16−2.2 ± 0.501.5 ± 0.10−0.7
 1.0−1.0 ± 0.00.8 ± 0.010.8 ± 0.100.02 ± 0.01−0.18−3.3 ± 0.382.2 ± 0.29−1.1
 2.0−2.0 ± 0.00.3 ± 0.240.2 ± 0.180.58 ± 0.18−1.22−1.7 ± 0.400.66 ± 0.20−1.0
 3.0−2.9 ± 0.160.0c 0.2c NDND−2.8c 1.1c −1.7
Strain FWKO B
 0.5−0.5 ± 0.0b −0.4 ± 0.12−0.2 ± 0.170.26 ± 0.04−0.24−0.9 ± 0.320.88 ± 0.030
 1.0−1.0 ± 0.0−0.3 ± 0.00.0 ± 0.00.57 ± 0.08−0.43−1.2 ± 0.101.4 ± 0.150
 2.0−2.0 ± 0.0−0.4 ± 0.12−0.2 ± 0.121.15 ± 0.09−0.85−2.3 ± 0.312.3 ± 0.060
 3.0−3.0 ± 0.0−0.3 ± 0.250.0 ± 0.061.37 ± 0.04−1.63−3.2 ± 0.063.0 ± 0.080
  • a Soluble sulfur as measrued by X-ray fluroescence spectroscopy.

  • b Samples after 48 h of incubation at 30°C; average ± standard deviation; n = 3.

  • c n = 1.

  • d Total sulfur unaccounted for as either SO4 2− or S0.

  • e Total nitrogen unaccounted for in the form of either N2O or N2; calculated as ΔNO3 + ΔNO2 .