Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Hydrous manganese oxide doped gel probe sampler for measuring in situ reductive dissolution rates. 1. Laboratory development
 
research article

Hydrous manganese oxide doped gel probe sampler for measuring in situ reductive dissolution rates. 1. Laboratory development

Farnsworth, C. E.
•
Hering, J. G.  
2010
Environmental Science & Technology

Reductive dissolution of redox-sensitive minerals such as manganese (Mn) oxides in natural sediments is an important mechanism for trace element mobilization into groundwater. A gel probe sampler has been constructed to study in situ reductive dissolution of Mn oxides. The gel consists of a polyacrylamide polymer matrix doped with hydrous Mn oxide (HMO). Gel slabs are mounted into a probe, which is designed to be inserted into the sediments. The amount of Mn released from the gel by reductive dissolution is determined by comparing the amount of Mn initially embedded into the gel with the amount remaining in the gel after exposure to conditions in the sediments or, in laboratory studies, to reducing agents. In this laboratory study, the performance of the gel probes was examined using the model reductant ascorbate and the Mnreducing bacteria Shewanella oneidensis strain MR-1. In addition, a 1-D model was used to relate the reaction rates observed for HMO embedded in gels to those for HMO in suspension. One limitation of the HMO-doped gels for assessing microbial reduction rates is that the gels prevent direct contact between the microbes and theHMOand hence preclude enzymatic reduction at the cell surface. Nonetheless, the HMOdoped gel probes offer the possibility to establish a lower bound for Mn-reduction capacity in sediments. © 2010 American Chemical Society.

  • Details
  • Metrics
Type
research article
DOI
10.1021/es901577q
Scopus ID

2-s2.0-75349093605

Author(s)
Farnsworth, C. E.
Hering, J. G.  
Date Issued

2010

Published in
Environmental Science & Technology
Volume

44

Issue

1

Start page

34

End page

40

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
UPHCE  
Available on Infoscience
November 25, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/58642
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés