CaltechAUTHORS
  A Caltech Library Service

Marine Bacterial Degradation of Brominated Methanes

Goodwin, Kelly D. and Lidstrom, Mary E. and Oremland, Ronald S. (1997) Marine Bacterial Degradation of Brominated Methanes. Environmental Science and Technology, 31 (11). pp. 3188-3192. ISSN 0013-936X. https://resolver.caltech.edu/CaltechAUTHORS:20180510-152203541

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20180510-152203541

Abstract

Brominated methanes are ozone-depleting compounds whose natural sources include marine algae such as kelp. Brominated methane degradation by bacteria was investigated to address whether bacterial processes might effect net emission of these compounds to the atmosphere. Bacteria in seawater collected from California kelp beds degraded CH_2Br_2 but not CHBr_3. Specific inhibitors showed that methanotrophs and nitrifiers did not significantly contribute to CH_2Br_2 removal. A seawater enrichment culture oxidized ^(14)CH_2Br_2 to ^(14)CO_2 as well as ^(14)CH_3Br to ^(14)CO_2. The rates of CH_2Br_2 degradation in laboratory experiments suggest that bacterial degradation of CH_2Br_2 in a kelp bed accounts for <1% of the CH_2Br_2 produced by the kelp. However, the half-life of CH_2Br_2 due to bacterial removal appears faster than hydrolysis and within an order of magnitude of volatilization to the atmosphere.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://dx.doi.org/10.1021/es970165gDOIArticle
Additional Information:© 1997 American Chemical Society. Received for review February 25, 1997. Revised manuscript received August 1, 1997. Accepted August 13, 1997. We thank Dr. Margo Haygood and Dr. Brad Tebo from the Scripps Institute of Oceanography for use of polycarbonate filter holders. We thank Dr. Wheeler North from the California Institute of Technology for guidance and assistance with kelp biomass work and Penny Sherman for laboratory assistance. This research was funded by a grant from the Mellon Foundation and a grant from NSF (EID 9023500). K.G. was partially supported by an NIH training grant (T32 GM08346).
Funders:
Funding AgencyGrant Number
Andrew W. Mellon FoundationUNSPECIFIED
NSFEID-9023500
NIH Predoctoral FellowshipT32 GM08346
Issue or Number:11
Record Number:CaltechAUTHORS:20180510-152203541
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180510-152203541
Official Citation:Marine Bacterial Degradation of Brominated Methanes Kelly D. Goodwin, Mary E. Lidstrom, and Ronald S. Oremland Environmental Science & Technology 1997 31 (11), 3188-3192 DOI: 10.1021/es970165g
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:86346
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:14 May 2018 15:34
Last Modified:03 Oct 2019 19:42

Repository Staff Only: item control page