Bioaccumulation, subcellular distribution and toxicity of sediment-associated copper in the ragworm Nereis diversicolor: The relative importance of aqueous copper, copper oxide nanoparticles and microparticles

被引:32
|
作者
Thit, Amalie [1 ]
Banta, Gary T. [1 ]
Selck, Henriette [1 ]
机构
[1] Roskilde Univ, Dept Environm Social & Spatial Change, DK-4000 Roskilde, Denmark
关键词
Cu body burden; Burrowing behaviour; NP; Polychaete; Sediment exposure; DEPOSIT-FEEDING SNAIL; POLYCHAETE HEDISTE-DIVERSICOLOR; CUO NANOPARTICLES; AQUATIC INVERTEBRATES; ESTUARINE POLYCHAETE; SILVER NANOPARTICLES; METAL DETOXIFICATION; OXIDATIVE STRESS; EPITHELIAL-CELLS; DAPHNIA-MAGNA;
D O I
10.1016/j.envpol.2015.02.025
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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.
引用
收藏
页码:50 / 57
页数:8
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