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Chronic toxicity of double-walled carbon nanotubes to three marine organisms: influence of different dispersion methods

Kwok, Kevin WH and Leung, Kenneth MY and Flahaut, Emmanuel and Cheng, Jinping and Cheng, Shuk Han Chronic toxicity of double-walled carbon nanotubes to three marine organisms: influence of different dispersion methods. (2010) Nanomedicine, vol. 5 (n° 6). pp. 951-961. ISSN 1743-5889

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Official URL: http://dx.doi.org/10.2217/nnm.10.59

Abstract

Double-walled carbon nanotubes (DWNTs) are found in a variety of consumer products, but there are no ecotoxicity data of DWNTs into marine organisms. Materials & methods: Chronic toxicity of DWNTs was investigated with the diatom Thalassiosira pseudonana, copepod Tigriopus japonicus and medaka Oryzias melastigma. DWNTs were dispersed using sonication (so-DWNTs) and stirring (st-DWNTs) for comparison. Results: The median aggregation size (0.89 μm2) of so-DWNTs was smaller than that of st-DWNTs (21.8 μm2). Exposure to DWNTs led to growth inhibition of T. pseudonana with EC50s of 1.86 and 22.7 mg/l for so- and st-DWNTs, respectively. Population growth of T. japonicus was reduced to 0.1 mg/l for so-DWNTs and 10 mg/l for st-DWNTs. Growth inhibition in O. melastigma was observed at 10 mg/l for so-DWNTs but not for st-DWNTs. Conclusion:Given that so-DWNTs are consistently significantly more toxic than st-DWNTs, dispersion method and size of aggregations should be considered in DWNT toxicity testing.

Item Type:Article
Additional Information:Thanks to Future Medicine editor. The definitive version is available at https://www.futuremedicine.com/ The original PDF of the article can be found at Nanomedicine website : https://www.futuremedicine.com/doi/10.2217/nnm.10.59
HAL Id:hal-01562933
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > City University of Hong Kong (CHINA)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Duke University (USA)
Other partners > University of Hong Kong - HKU (CHINA)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:17 Jul 2017 09:12

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