| Selenate reduction to elemental selenium by anaerobic bacteria in sediments and culture: biogeochemical significance of a novel, sulfate-independent respiration. | |
| | |
MedLine Citation:
|
PMID: 16348014 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
|
Interstitial water profiles of SeO(4), SeO(3), SO(4), and Cl in anoxic sediments indicated removal of the seleno-oxyanions by a near-surface process unrelated to sulfate reduction. In sediment slurry experiments, a complete reductive removal of SeO(4) occurred under anaerobic conditions, was more rapid with H(2) or acetate, and was inhibited by O(2), NO(3), MnO(2), or autoclaving but not by SO(4) or FeOOH. Oxidation of acetate in sediments could be coupled to selenate but not to molybdate. Reduction of selenate to elemental selenium was determined to be the mechanism for loss from solution. Selenate reduction was inhibited by tungstate and chromate but not by molybdate. A small quantity of the elemental selenium precipitated into sediments from solution could be resolublized by oxidation with either nitrate or FeOOH, but not with MnO(2). A bacterium isolated from estuarine sediments demonstrated selenate-dependent growth on acetate, forming elemental selenium and carbon dioxide as respiratory end products. These results indicate that dissimilatory selenate reduction to elemental selenium is the major sink for selenium oxyanions in anoxic sediments. In addition, they suggest application as a treatment process for removing selenium oxyanions from wastewaters and also offer an explanation for the presence of selenite in oxic waters. |
| | |
Authors:
|
R S Oremland; J T Hollibaugh; A S Maest; T S Presser; L G Miller; C W Culbertson |
Related Documents
:
|
14499554 - Modelling metal desorption kinetics in estuaries. 20927624 - Seasonal changes of pfos and pfoa concentrations in lake biwa water. 18078994 - Oxidative stress response in an endangered goodeid fish (girardinichthys viviparus) by ... 14563174 - Interstitial ciliates: benthic microaerophiles or planktonic anaerobes? 10405214 - The relation between body size and normalized small solute clearances in continuous amb... 10427584 - Physico-chemical stability of docetaxel premix solution and docetaxel infusion solution... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Applied and environmental microbiology Volume: 55 ISSN: 0099-2240 ISO Abbreviation: Appl. Environ. Microbiol. Publication Date: 1989 Sep |
Date Detail:
|
Created Date: 2010-06-25 Completed Date: 2010-06-25 Revised Date: 2010-09-20 |
Medline Journal Info:
|
Nlm Unique ID: 7605801 Medline TA: Appl Environ Microbiol Country: United States |
Other Details:
|
Languages: eng Pagination: 2333-43 Citation Subset: - |
Affiliation:
|
Water Resources Division, U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025, and Tiburon Center, San Francisco State University, Tiburon, California 94920. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Colonization of a Submersed Aquatic Plant, Eurasian Water Milfoil (Myriophyllum spicatum), by Fungi ...
Next Document: Simulation of Airborne Microbial Droplet Transport.