Document Detail


Bioaccumulation and toxicity of single walled carbon nanotubles (SWNT) to benthic organisms at the base of the marine food chain.
MedLine Citation:
PMID:  23404747     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
As the use of single-walled carbon nanotubes (SWNT) increases over time, so does the potential for environmental release. Our research aimed to determine the toxicity, bioavailability and bioaccumulation of SWNT in marine benthic organisms at the base of the food chain. The toxicity of SWNT was tested in a whole sediment exposure with the amphipod Ampelisca abdita and the mysid Americamysis bahia. Additionally, SWNT were amended to sediment and/or food matrices to determine their bioavailability and bioaccumulation through these routes in A. abdita, A. bahia, and the estuarine amphipod Leptocheirus plumulosus. No significant mortality to any species via sediment or food matrices was observed at concentrations up to 100 ppm. A novel near infrared fluorescence (NIRF) spectroscopic method was utilized to measure and characterize the body burdens of pristine SWNT in non-depurated and depurated organisms. SWNT were not detected in depurated organisms, but were quantified in non-depurated A. abdita fed SWNT-amended algae. After a 28 day exposure to [(14) C]SWNT-amended sediment (100 µg/g) and algae (100 µg/g), [(14) C]SWNT was detected in depurated and non-depurated L. plumulosus amphipods at 0.50 µg/g and 5.38 µg/g, respectively. The results indicate SWNT are bioaccessible to marine benthic organisms but do not appear to accumulate or cause toxicity. Environ. Toxicol. Chem. © 2013 SETAC.
Authors:
Ashley N Parks; Lisa M Portis; Ariette Schierz; Kate M Washburn; Monique M Perron; Robert M Burgess; Kay T Ho; G Thomas Chandler; P Lee Ferguson
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-12
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  -     ISSN:  1552-8618     ISO Abbreviation:  Environ. Toxicol. Chem.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-2-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2013 SETAC.
Affiliation:
Nicholas School of the Environment, Duke University, Durham, NC, USA.
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