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Microbial Bioremediation of Uranium01:25

Microbial Bioremediation of Uranium

Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella, which use...

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Related Experiment Video

Updated: May 22, 2026

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability
09:23

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability

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Uranium accumulation by Pseudomonas sp. EPS-5028.

Ana M Marqués1, Xavier Roca, M Dolores Simon-Pujol

  • 1Laboratorio de Microbiología, Facultad de Farmacia, Núcleo Universitario de Pedralbes Universidad de Barcelona, 08028, Barcelona, Spain.

Applied Microbiology and Biotechnology
|May 25, 2012
PubMed
Summary

This study shows Pseudomonas sp. EPS-5028 rapidly accumulates uranium, forming intracellular fibrils. The microorganism can be reused as a biosorbent after chemical uranium removal.

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Area of Science:

  • Environmental Microbiology
  • Bioremediation
  • Heavy Metal Accumulation

Background:

  • Uranium contamination poses environmental risks.
  • Microbial biosorption offers a sustainable solution for heavy metal removal.
  • Efficient biosorbents are needed for uranium remediation.

Purpose of the Study:

  • To investigate the uranium accumulation capacity of Pseudomonas sp. EPS-5028.
  • To understand the factors influencing uranium uptake by this bacterium.
  • To assess the potential of Pseudomonas sp. EPS-5028 as a reusable biosorbent for uranium.

Main Methods:

  • Culturing Pseudomonas sp. EPS-5028.
  • Exposing bacterial cells to varying uranium concentrations.
  • Analyzing uranium uptake using chemical methods.
  • Visualizing intracellular uranium accumulation via electron microscopy.

Main Results:

  • Pseudomonas sp. EPS-5028 demonstrated rapid uranium uptake.
  • Uranium accumulation was pH-dependent but not affected by temperature or inhibitors.
  • Maximum uptake reached 55 mg uranium/g cell dry weight.
  • Electron microscopy revealed intracellular, needle-like uranium fibrils.
  • Chemically eluted cells retained biosorbent activity for reuse.

Conclusions:

  • Pseudomonas sp. EPS-5028 is an effective biosorbent for uranium.
  • Intracellular accumulation mechanism is significant.
  • The bacterium's reusability enhances its potential for bioremediation applications.