期刊
ENVIRONMENTAL POLLUTION
卷 202, 期 -, 页码 50-57出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2015.02.025
关键词
Cu body burden; Burrowing behaviour; NP; Polychaete; Sediment exposure
资金
- Roskilde University, Denmark
- European Union Seventh Framework Program (FP7) (NanoReTox) [214478]
The sediment-dwelling ragworm, Nereis diversicolor was exposed to sediment spiked with aqueous Cu (Cu-Aq, CuCl2), CuO nanoparticles (CuONP) or CuO microparticles (CUOMICRO) at 150 mu g Cu g(-1) dw sediment for 10d. Exposures to Cu-Aq and CuOMICRO caused mortality (62.5 and 37.5%, respectively), whereas mean burrowing time increased during exposure to Cu-Aq and CuONP from 0.12 h (controls) to 19.3 and 12.2 h, respectively. All Cu treatments bioaccumulated, especially Cu-Aq (up to 4 times more than the other treatments). Cu was roughly equally distributed among the five subcellular fractions in controls and worms exposed to CuONP or CuOMICRO. In contrast, approximate to 50% of accumulated Cu in Cu-Aq exposed worms was found in metal rich granules and significantly more Cu was present in heat-denatured proteins and organelles than in worms exposed to CuOMICRO or in controls. Our results suggest that Cu form affects its bioaccumulation and subsequent toxicity and detoxification in a polychaete like N. diversicolor. (C) 2015 Elsevier Ltd. All rights reserved.
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