| Stream periphytic biodegradation of the anionic surfactant C12-alkyl sulfate at environmentally relevant concentrations. | |
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MedLine Citation:
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PMID: 9143458 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effects of continuous exposure to C12-alkyl sulfate on a periphytic microbial community were determined in an 8-week stream mesocosm study. C12-alkyl sulfate concentrations ranged from environmentally relevant (< 10-20 micrograms/liter) to unrealistically high concentrations (> 1500 micrograms/liter). Endpoints evaluated included turnover rates, bacterial cell density, heterotrophic mixed amino acid uptake, and fatty acid profile evaluations. Predosed periphyton demonstrated a mean turnover rate for C12-alkyl sulfate of 0.08/hr. During the 8-week dosing period, a significant increase in mean turnover rates was observed in streams dosed with > or = 61 micrograms C12-alkyl sulfate/liter, despite a 10 degrees C drop in stream temperature. A significant correlation between turnover rate and C12-alkyl sulfate concentration was also observed. While bacterial cell density increased during the study, it was determined that the biodegradation acclimation to C12-alkyl sulfate was not biomass-specific. Likewise, bacterial activity generally increased over the study, but it did not correlate with either biodegradation or bacterial cell density. Lastly, phospholipid fatty acid profiles indicate that a shift in the microbial community occurred in the high-dose stream as opposed to the control stream. This study demonstrates that C12-alkyl sulfate is rapidly degraded and induces a biodegradative acclimation response at environmentally relevant concentrations. |
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Authors:
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D M Lee; J B Guckert; R M Ventullo; D H Davidson; S E Belanger |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Ecotoxicology and environmental safety Volume: 36 ISSN: 0147-6513 ISO Abbreviation: Ecotoxicol. Environ. Saf. Publication Date: 1997 Apr |
Date Detail:
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Created Date: 1997-06-04 Completed Date: 1997-06-04 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7805381 Medline TA: Ecotoxicol Environ Saf Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 288-96 Citation Subset: IM; S |
Affiliation:
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Biology Department, University of Dayton, Ohio 45469, USA. leedm1@pg.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acids
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metabolism Bacteria / growth & development Biodegradation, Environmental Biomass Fatty Acids / analysis, metabolism Phospholipids / analysis, metabolism Plants / metabolism* Sodium Dodecyl Sulfate / metabolism* Surface-Active Agents / metabolism* Temperature Water Microbiology |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 0/Fatty Acids; 0/Phospholipids; 0/Surface-Active Agents; 151-21-3/Sodium Dodecyl Sulfate |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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