Table 1.

Composition of the MMS liquid medium used for growth of and Mn oxidation byL. discophora SS -1a

ComponentConcn in ddH2O
CaCl2 · 2H2O30200
MgSO4 · 7H2O35140
(NH4)2SO4 120910
KNO3 15150
NaHCO3 0.8410
KH2PO4 0.705
Vitamin B12 0.0020.0015
FeSO4 0.0150.1
  • a The initial pH of the medium was 6.0, and the ionic strength was adjusted to 0.05 M with NaNO3. The concentrations of the different lead species in MMS medium (in the absence of vitamin B12 and FeSO4) for a total dissolved lead concentration of 1.0 μM were as follows: Pb2+, 0.89 μM; PbSO4, 0.09 μM; and PbOH+, 0.012 μM.