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Researchers from the University of Birmingham, UK, presented a method for the removal of alpha-emitting actinicides neptunium (V) generated by the nuclear fuel cycle. Np(V) can be removed by using Citrobacter sp. and Shewanella putrefaciens microorganisms together.

A possibility of release of an extracellular c-type cytochrome by Geobacter sulfurreducens is discussed. Results indicate that 9.6-kDa cytochrome is not an effective shuttle between G. sulfurreducens and Fe(III) oxide.

Resting cells of Desulfovibrio desulfuricans ATCC 29577 were employed to reduce soluble Pd2+ to elemental, cell-bound palladium supported by pyruvate, formate of H2 as the electron donor without biochemical cofactors. The employment of hydrogen as the electron donor suggests the possible use of hydrogenase with cytochrome c activity in Pd reduction, in accordance with the periplasmic localization of many hydrogenases in the sulfate-reducing bacteria and their inhibition in Cu2+.