| 摘要 |
<p>The invention provides a method for extracting one or more selected species from a sample, the selected species comprising one or more metallic elements, preferably of pentavalent or higher valency form such as Neptunium v, or one or more ions incorporating one or more metallic elements, the method comprising providing the selected species in a dissolved form, contacting the selected species with a first, preferably microorganism based agent, the first agent reducing the selected species of valency, contacting the selected species with a second agent to convert the selected species to an insoluble form, the second agent being a microorganism selected from Citrobacter sp, Acinetobacter sp or Escherichia coli and removing the insoluble species from the sample. The first reducing agent is preferably a sulphate reducing bacterium such as Desulfovibrio sp and/or Clostridium sp, or Shewanella sp. The technique is particularly suited for the bioremediation of species not adapted to precipitation in a single stage.</p> |
