Skip to main content

Effects of electron donor, dissolved oxygen, and oxidation–reduction potential biodegradation of carbon tetrachloride by Escherichia coli K-12

Buy Article:

$22.00 plus tax (Refund Policy)

Carbon tetrachloride (CT) is recalcitrant to spontaneous degradation. To achieve efficient biodegradation of CT, conditions favorable for dechlorination should be created. Oxidation–reduction potential (ORP) and dissolved oxygen (DO) were found to be important environmental factors in optimizing CT bioremediation. A desired oxidation-reduction environment was obtained by controlling medium composition and/or adding external reducing agents. Environmental modification resulted in greater than 80% removal of CT by Escherichia coli K-12 at a CT initial concentration of 300 μg/L within 300 hours under the conditions of this study. The degradation followed pseudo-first-order kinetics. A substantially improved overall substrate removal rate constant, K, hence a more efficient CT removal, are observed at −162 mV < ORP < −50 mV under the conditions of the study. The trend of decreasing K observed at ORP of approximately −160 mv is caused by inhibition of the reducing agent titanium (III) citrate on E. coli K-12 at its higher concentrations. At trace DO levels, ORP was found to be a more reliable and feasible parameter for CT biodegradation correlation. Results obtained from this study yield higher and more consistent CT biodegradation rates than those reported in the literature for the same type culture of microorganisms. This underscores the significance of DO and ORP as conditions for optimizing CT biodegradation. These findings are important in terms of field application, which is commonly limited by site-specific environmental conditions.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics


Document Type: Research Article

Publication date: 1997-09-01

More about this publication?
  • Water Environment Research (WER) is published monthly, including an annual Literature Review. A subscription to WER includes access to the latest content back to 1992, as well as access to fast track articles. An individual subscription is valid for 12 months from month of purchase.

    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
  • Editorial Board
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Membership Information
  • Information for Advertisers
  • WEF Bookstore
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more