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Bioaccumulation and effects of sediment-associated gold-and graphene oxide nanoparticles on Tubifex tubifex

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【题名】：Bioaccumulation and effects of sediment-associated gold-and graphene oxide nanoparticles on Tubifex tubifex
【年份】：2017
【作者】：Panhong Zhang，Henriette Selck，Stine Rosendal Tangaa，Chengfang Pang，Bin Zhao
【关键词】：纳米粒子　　氧化石墨　　沉积物　　伴生金　　底栖无脊椎动物　　金纳米颗粒　　生物　　生态毒理效应
【摘要】：With the development of nanotechnology,gold(Au) and graphene oxide(GO) nanoparticles have been widely used in various fields,resulting in an increased release of these particles into the environment.The released nanoparticles may eventually accumulate in sediment,causing possible ecotoxicological effects to benthic invertebrates.However,the impact of Au-NPs and GO-NPs on the cosmopolitan oligochaete,Tubifex tubifex,in sediment exposure is not known.Mortality,behavioral impact(GO-NP and Au-NP) and uptake(only Au-NP) of sediment-associated Au-NPs(4.9±0.14 nm) and GO-NPs(116±0.05 nm) to T.tubifex were assessed in a number of 5-day exposure experiments.The results showed that the applied Au-NP concentrations(10 and 60 μg Au/g dry weight sediment) had no adverse effect on T.tubifex survival,while Au bioaccumulation increased with exposure concentration.In the case of GO-NPs,no mortality of T.tubifex was observed at a concentration range of 20 and180 μg GO/g dry weight sediment,whereas burrowing activity was significantly reduced at 20 and 180 μg GO/g dry weight sediment.Our results suggest that Au-NPs at 60 μg Au/g or GO-NPs at 20 and 180 μg GO/g were detected by T.tubifex as toxicants during short-term exposures.
【期刊名】：环境科学学报(英文版)
【分类号】：X171.5
【期号】：第1期
【资金项目】：supported by the national natural science foundation of china(nos.21525730,21407162)；the strategic priority research program of the chinese academy of sciences(nos.xdb14030401,xdb14030402)；roskilde university and sino-danish center for education and research center
【作者单位】：State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,University of Chinese Academy of Sciences；Sino-Danish Center for Education and Research；Department of Science and Environment,Roskilde University
【页码】：138-145

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