title: Uranium interaction with two multi-resistant environmental bacteria: Cupriavidus metallidurans CH34 and Rhodopseudomonas palustris.
abstract: Depending on speciation, U environmental contamination may be spread through the environment or inversely restrained to a limited area. Induction of U precipitation via biogenic or non-biogenic processes would reduce the dissemination of U contamination. To this aim U oxidation/reduction processes triggered by bacteria are presently intensively studied. Using X-ray absorption analysis, we describe in the present article the ability of Cupriavidus metallidurans CH34 and Rhodopseudomonas palustris, highly resistant to a variety of metals and metalloids or to organic pollutants, to withstand high concentrations of U and to immobilize it either through biosorption or through reduction to non-uraninite U(IV)-phosphate or U(IV)-carboxylate compounds. These bacterial strains are thus good candidates for U bioremediation strategies, particularly in the context of multi-pollutant or mixed-waste contaminations.
authors.affiliation: ESRF-CRG-FAME, Polygone Scientifique Louis Néel, Grenoble, France.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Llorens
authors.forename: Guillaume
authors.initials: G
authors.lastname: Untereiner
authors.forename: Danielle
authors.initials: D
authors.lastname: Jaillard
authors.forename: Barbara
authors.initials: B
authors.lastname: Gouget
authors.forename: Virginie
authors.initials: V
authors.lastname: Chapon
authors.forename: Marie
authors.initials: M
authors.lastname: Carriere
mesh_terms: D001673:Biodegradation, Environmental / Q000187:drug effects; D049921:Cupriavidus / Q000187:drug effects* / Q000254:growth & development / Q000648:ultrastructure; D004783:Environmental Microbiology; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D012241:Rhodopseudomonas / Q000187:drug effects* / Q000254:growth & development / Q000648:ultrastructure; D014501:Uranium / Q000378:metabolism / Q000633:toxicity*; D056928:X-Ray Absorption Spectroscopy
chemical_list: D014501:Uranium