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  • A mesocosm study of fate and effects of CuO nanoparticles on endobenthic species (Scrobicularia plana, Hediste diversicolor).

A mesocosm study of fate and effects of CuO nanoparticles on endobenthic species (Scrobicularia plana, Hediste diversicolor).

Environmental science & technology (2012-12-18)
Pierre-Emmanuel Buffet, Marion Richard, Fanny Caupos, Aurore Vergnoux, Hanane Perrein-Ettajani, Andrea Luna-Acosta, Farida Akcha, Jean-Claude Amiard, Claude Amiard-Triquet, Marielle Guibbolini, Christine Risso-De Faverney, Helene Thomas-Guyon, Paul Reip, Agnieska Dybowska, Deborah Berhanu, Eugenia Valsami-Jones, Catherine Mouneyrac
ABSTRACT

The fate and effects of CuO nanoparticles (CuO NPs) were examined in endobenthic species (Scrobicularia plana , Hediste diversicolor), under environmentally realistic conditions in outdoor mesocosms (exposure to Cu at 10 μg L(-1) in particulate (CuO NPs) or soluble salt (CuNO(3)) forms) for 21 days. Labile Cu was determined in water and sediment by using diffusive gradient in thin films. No labile Cu being detected from CuO NPs; the observed effects in invertebrates exposed to CuO NPs were mainly attributed to the toxicity of nanoparticulate rather than dissolved Cu toxicity. Bioaccumulation of CuO NPs was observed in both species. Biomarkers were examined at different levels of biological organization: biochemical markers of defense and damage, biomarkers of genotoxicity (comet assay), and behavioral biomarkers (feeding and burrowing). Behavioral biomarkers, antioxidant defenses (catalase, glutathion S-transferase, metallothionein), and genotoxicity are the most sensitive tools to highlight the effect of soluble or nanoparticulate metal forms. Concerning other biomarkers of defense (superoxide dismutase, lactate dehydrogenase, laccase) and damage (thiobarbituric acid reactive substances, acetylcholinesterase, acid phosphatase), no significant effects were detected. This experiment shows the suitability of mesocosms for studying the environmental effects of nanoparticles.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
氧化铜, nanopowder, <50 nm particle size (TEM)
Sigma-Aldrich
氧化铜, ACS reagent, ≥99.0%
Sigma-Aldrich
氧化铜, powder, 99.99% trace metals basis
Sigma-Aldrich
氧化铜, powder, <10 μm, 98%
Sigma-Aldrich
氧化铜, needles, mixture of CuO and Cu2O, ACS reagent
Sigma-Aldrich
氧化铜, 99.999% trace metals basis
Sigma-Aldrich
铝基氧化铜, 14-30 mesh, extent of labeling: 13 wt. % loading
Sigma-Aldrich
氧化铜, powder, 99.995% trace metals basis