Journal
ENVIRONMENTAL POLLUTION
Volume 158, Issue 5, Pages 1748-1755Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2009.11.013
Keywords
Ecotoxicology; Arenicola marina; Nanoparticle; Coherent anti-stokes Raman microscopy; Genotoxicity
Categories
Funding
- University of Exeter, UK
- Universita Politecnica delle Marche, Italy
- Erasmus travelling fellowship
- [NE/D004942/1]
- EPSRC [EP/G043140/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G043140/1] Funding Source: researchfish
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The ecotoxicology of manufactured nanoparticles (MNPs) in estuarine environments is not well understood. Here we explore the hypothesis that nanoTiO(2) and single walled nanotubes (SWNT) cause sublethal impacts to the infaunal species Arenicola marina (lugworm) exposed through natural sediments. Using a 10 day OECD/ASTM 1990 acute toxicity test, no significant effects were seen for SWNT up to 0.03 g/kg and no uptake of SWNTs into tissues was observed. A significant decrease in casting rate (P = 0.018), increase in cellular damage (P = 0.04) and DNA damage in coelomocytes (P = 0.008) was measured for nanoTiO(2), with a preliminary LOEC of 1 g/kg. Coherent anti-stokes Raman scattering microscopy (CARS) located aggregates of TiO2 of >200 nm within the lumen of the gut and adhered to the outer epithelium of the worms, although no visible uptake of particles into tissues was detected. (C) 2009 Elsevier Ltd. All rights reserved.
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