Iron oxidizing bacteria, mineral oxidation

Bridge TAM, Johnson DB. 1998. Reduction of soluble iron and reductive dissolution of ferric iron containing minerals by moderately thermophilic iron-oxidizing bacteria. Appl Environ Microbiol 64 2181-6. 

Reduction of nitro aromatic compounds often appears to be a two-step process, in which a mediator is required for facile transfer of electrons from a bulk reductant to the contaminant. A well documented example is the coupling of organic matter oxidation by iron reducing bacteria to "abiotic" nitro reduction by biogenic Fe(II) that is adsorbed to mineral surfaces in a column containing aquifer material (36, 39, 76). 

Figure 7 Progressive stages of tnicrobially mediated iron oxide mineralization of a rod-shaped bacteria. Scale bars = 0.1 p,m (a) original bacteria, (b) early deposition of amorphous hydrated iron oxide (ferrihydrite), and (c) intense deposits of acicular magnetite (source Mann et al., 1992, photo 2, p. 118).

While working toward an appreciation of the role of inorganic ions in solution, he initiated an examination of the solid inorganic phases, the biominerals. In particular he has been associated with studies on the detailed structures, down to atomic resolution using the electron microscope, of such minerals as the iron oxides of magnetotactic bacteria and in the teeth of limpets the silica in a variety of plant hairs and in... 

Principal sulfur-oxidizing and iron-oxidizing bacteria involved in sulfide mineral degradation... 

The practical significance of metal release from sulfide minerals has focussed attention on the mechanisms which operate under the conditions of the highest metal concentrations in the aqueous phase of field situations, and on the associated organisms. The most studied substrates have been iron and copper sulfide minerals and the unique position of T. ferrooxidans as the principal terminal member of the pH-dependent successions of both sulfur-oxidizing and iron-oxidizing bacteria has led to intensive investigation of this... 

Edwards, K. J., Bach, W., McCollom, T. M., and Rogers, D. R. (2004). Neutrophilic iron-oxidizing bacteria in the ocean their habitats, diversity, and roles in mineral deposition, rock alteration, and biomass production in the deep-sea. Geomicrobiol. J. 21, 393-404. 

---