Biominéralisation et réactivité de la rouille verte carbonatée par shewanella putrefaciens en système hétérogène fermé et en écoulement continu

Abstract : Green rusts are mixed species Fe(II)-Fe(III) present in hydromorphic soils as fougerite. They are capable to reduce organic and metallic pollutants. Green rusts may be produced from the bioreduction of lepidocrocite [gamma]-FeOOH by Shewanella putrefaciens, a dissimilatory iron reducing bacteria. In order to understand their formation routes in the environment and eventually, use their reactivity in a system for soil and water remediation (sand column), we studied their formation in a batch system with silica phase (quartz sand and silicic acid) and with two organic polymers (PAA polyacrylate and polyacrylamide PAM).The silica polymers appear to be good stabilizers, favorable to the formation of green rusts. Green rusts formed in the presence of the stabilizing agents retain their reductive capacity toward an organic pollutant, methyl red and a metallic pollutant, mercury Hg2+. Then, we have transposed our system in a flow through column of sand + lepidocrocite [gamma]-FeOOH. The carbonate green rust was formed and identified as secondary mineral of lepidocrocite bioreduction by Shewanella putrefaciens
Document type :
Theses
Complete list of metadatas

Cited literature [168 references]  Display  Hide  Download

https://hal.univ-lorraine.fr/tel-01749665
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 12:22:47 PM
Last modification on : Wednesday, August 29, 2018 - 3:05:43 PM
Long-term archiving on : Friday, September 14, 2018 - 9:57:16 AM

File

DDOC_T_2012_0355_SERGENT.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01749665, version 1

Citation

Anne-Sophie Sergent. Biominéralisation et réactivité de la rouille verte carbonatée par shewanella putrefaciens en système hétérogène fermé et en écoulement continu. Biochimie, Biologie Moléculaire. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0355⟩. ⟨tel-01749665⟩

Share

Metrics

Record views

19

Files downloads

11