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题名: Tissue distribution of Ag and oxidative stress responses in the freshwater snail Bellamya aeruginosa exposed to sediment-associated Ag nanoparticles
作者: Bao, Shaopan1; Huang, Jiaolong1, 2; Liu, Xiawei1, 2; Tang, Wei1; Fang, Tao1
关键词: Bioaccumulation ; Size ; Hepatopancreas ; Toxicity ; Aquatic organism
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
发表日期: 2018-12-10
DOI: 10.1016/j.scitotenv.2018.07.011
卷: 644, 页:736-746
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: Silver nanoparticles (AgNPs) are among the most widely used engineered nanomaterials and may eventually accumulate in sediments. Limited information is currently available regarding the toxicity, bioaccumulation and distribution of sediment-associated AgNPs in aquatic organisms. In the present study, a freshwater snail Bellamya aeruginosa was exposed via sediment to commercial Ag particles of four nominal sizes: 20 nm (AgNPs-20), 40 nm (AgNPs-40), 80 nm (AgNPs-80), and < 10 mu m (bulk Ag), and to silver nitrate at sub-lethal concentrations (1, 10 and 100 mu g Ag/g sediment). Ag burden and biomarkers of oxidative stress were assessed in different tissues of B. aeruginosa: hepatopancreas, gonad, foot and digestive tracts. All five Ag types were available for uptake by B. aeruginosa when spiked into sediment, and Ag accumulation in different tissues presented the following pattern: hepatopancreas > gonad approximate to digestive tracts > foot. Snails accumulated higher levels of Ag from aqueous Ag than from particulate Ag. In contrast, AgNPs-40 and AgNPs-80 treatments occasionally induced higher oxidative stress than aqueous Ag, indicating the significant role of nanoparticle itself in exerting toxicity. Size-dependent toxicity of AgNPs in sediment was also found, with AgNPs-20 showing lower toxicity than other Ag particles. Overall, this study demonstrated that the toxicity of sediment-associated AgNPs to B. aeruginosa varies with size and differs from aqueous Ag. (C) 2018 Elsevier B.V. All rights reserved.
关键词[WOS]: SILVER NANOPARTICLES ; NEREIS-DIVERSICOLOR ; ESTUARINE POLYCHAETE ; HEDISTE-DIVERSICOLOR ; ENVIRONMENTAL FATE ; DAPHNIA-MAGNA ; TOXICITY ; BIOACCUMULATION ; LAKE ; TRANSFORMATIONS
语种: 英语
项目资助者: National Natural Science Foundation of China(21477159)
WOS记录号: WOS:000445164000075
ISSN号: 0048-9697
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/56156
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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