Paper Title:
Enrichment of Chromium-Reducing Bacteria Using Potential-Controlled Electrochemical Cultivation
  Abstract

We present here a method for the electrochemical enrichment of chromium-reducing bacteria from environmental samples containing various microorganisms. An electrochemical cultivation system was constructed; this consisted of a Pt anode and a carbon cathode separated by an ion-exchange membrane. For an electrochemical cultivation, an environmental sample with chromium-reducing bacteria was inoculated into the anode well where a medium containing 0.1 mM Cr(VI) ions was poured. On the other hand, Cr(VI)-free medium was poured into the cathode well. Chromium-reducing bacteria grew selectively after 10 days of incubation and application of 1.0 V (vs. Ag/AgCl) of anode potential that reproduces Cr(VI) ions. This result suggested that Cr(VI) ions generated on the anode promoted the growth of chromium-reducing bacteria as their electron acceptor and due to Cr(VI) toxicity, inhibited the growth of other microorganisms.

  Info
Periodical
Advanced Materials Research (Volumes 20-21)
Edited by
Axel Schippers, Wolfgang Sand, Franz Glombitza and Sabine Willscher
Pages
505-508
DOI
10.4028/www.scientific.net/AMR.20-21.505
Citation
N. Matsumoto, S. Hirano, N. Ohmura, "Enrichment of Chromium-Reducing Bacteria Using Potential-Controlled Electrochemical Cultivation", Advanced Materials Research, Vols. 20-21, pp. 505-508, 2007
Online since
July 2007
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Price
$32.00
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