| Fate of triclosan and evidence for reductive dechlorination of triclocarban in estuarine sediments. | |
| | |
MedLine Citation:
|
PMID: 18605588 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The biocides triclosan and triclocarban are wastewater contaminants whose occurrence and fate in estuarine sediments remain unexplored. We examined contaminant profiles in 137Cs/7Be-dated sediment cores taken near wastewater treatment plants in the Chesapeake Bay watershed (CB), Maryland and Jamaica Bay(JB), New York. In JB, biocide occurrences tracked the time course of biocide usage and wastewater treatment strategies employed, first appearing in the 1950s (triclocarban) and 1960s (triclosan), and peaking in the late 1960s and 1970s (24 +/- 0.54 and 0.8 +/- 0.4 mg/kg dry weight, respectively). In CB, where the time of sediment accumulation was not as well constrained by 137Cs depth profiles, triclocarban was only measurable in 137Cs-bearing sediments, peaking at 3.6 +/- 0.6 mg/ kg midway through the core and exceeding 1 mg/kg in recent deposits. In contrast, triclosan concentrations were low or not detectable in the CB core. Analysis of CB sediment by tandem mass spectrometry produced the first evidence for complete sequential dechlorination of triclocarban to the transformation products dichloro-, monochloro-, and unsubstituted carbanilide, which were detected at maxima of 15.5 +/- 1.8, 4.1 +/- 2.4, and 0.5 +/- 0.1 mg/kg, respectively. Concentrations of all carbanilide congeners combined were correlated with heavy metals (R2 > 0.64, P < 0.01), thereby identifying wastewater as the principal pathway of contamination. Environmental persistence over the past 40 years was observed for triclosan and triclocarban in JB, and for triclocarban's diphenylurea backbone in CB sediments. |
| | |
Authors:
|
Todd R Miller; Jochen Heidler; Steven N Chillrud; Amelia DeLaquil; Jerry C Ritchie; Jana N Mihalic; Richard Bopp; Rolf U Halden |
Related Documents
:
|
18989608 - Bioremediation of dyes in textile effluents by aspergillus oryzae. 12188638 - Aflatoxin and fumonisin contamination of commercial corn (zea mays) hybrids in mississi... 20401648 - Dissipation study of thiophanate methyl residue in/on grapes (vitis vinifera l.) in india. 20390878 - Removal of arsenic and natural organic matter from groundwater using ferric and alum sa... 12018528 - Antinociceptive activity of a neurosteroid tetrahydrodeoxycorticosterone (5alpha-pregna... 705038 - The effect of diuredosan on echinococcus granulosus and taenia hydatigena infections in... |
Publication Detail:
|
Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Environmental science & technology Volume: 42 ISSN: 0013-936X ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2008 Jun |
Date Detail:
|
Created Date: 2008-07-08 Completed Date: 2008-10-10 Revised Date: 2010-09-22 |
Medline Journal Info:
|
Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
|
Languages: eng Pagination: 4570-6 Citation Subset: IM |
Affiliation:
|
Center for Water and Health, Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21205, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Carbanilides
/
chemistry* Cesium Radioisotopes / chemistry Chlorine / chemistry* Geologic Sediments / chemistry* Oxidation-Reduction Triclosan / chemistry* |
| Grant Support | |
ID/Acronym/Agency:
|
1R01ES015445/ES/NIEHS NIH HHS; ES007384/ES/NIEHS NIH HHS; ES09089/ES/NIEHS NIH HHS; R01 ES015445-02/ES/NIEHS NIH HHS |
| Chemical | |
Reg. No./Substance:
|
0/Carbanilides; 0/Cesium Radioisotopes; 101-20-2/triclocarban; 3380-34-5/Triclosan; 7782-50-5/Chlorine |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Renewable energy powered membrane technology. 2. The effect of energy fluctuations on performance of...
Next Document: Rapid culture-independent quantitative detection of enterotoxigenic Escherichia coli in surface wate...