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题名: Effects of humic acid and ionic strength on TiO2 nanoparticles sublethal toxicity to zebrafish
作者: Fang, T.1; Yu, L. P.2, 3; Zhang, W. C.1; Bao, S. P.1, 3
关键词: TiO2 NPs ; Zebrafish ; Oxidative stress ; Humic acid ; Ionic strength
刊名: ECOTOXICOLOGY
发表日期: 2015-12-01
DOI: 10.1007/s10646-015-1541-6
卷: 24, 期:10, 页:2054-2066
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Ecology ; Environmental Sciences ; Toxicology
研究领域[WOS]: Environmental Sciences & Ecology ; Toxicology
英文摘要: The stability and bioavailability of titanium dioxide nanoparticles (TiO2 NPs) suspension could be modified by the physicochemical properties of solution. In the present study, the effect of humic acid (HA) and ionic strength (by adding NaCl) on aggregation and sedimentation of TiO2 NPs suspension were investigated. Accordingly, the sublethal toxicity of TiO2 NPs suspensions with different HA and NaCl concentrations toward zebrafish (Danio rerio) was evaluated by monitoring the changes of superoxide dismutase, catalase, malonaldehyde and glutathione in gill, liver and intestine. The results showed that the aggregations formation and hydrodynamic diameter of TiO2 NPs in suspensions are not essential characteristics to decide toxicity. The varied oxidative stress responses detected in gill, liver and intestine derived from different toxicity mechanisms of TiO2 NPs. Nevertheless, the oxidative stress could be suppressed by the adding of HA and/or the increase of ionic strength, which can decrease the bioavailability of TiO2 NPs in water. The study suggests that the environmental factors, such as HA and ionic strength, are important for the fate (aggregation and sedimentation) and toxicity of nanomaterials in aquatic environment.
关键词[WOS]: TITANIUM-DIOXIDE NANOPARTICLES ; CARP CYPRINUS-CARPIO ; OXIDATIVE STRESS ; AQUEOUS SUSPENSIONS ; DANIO-RERIO ; EXPOSURE ; NANOMATERIALS ; ECOTOXICOLOGY ; ORGANISMS ; NANO-TIO2
语种: 英语
项目资助者: Major Science and Technology Program for Water Pollution Control and Treatment(2012ZX07103-003) ; National Natural Science Foundation of China(21477159)
WOS记录号: WOS:000365758200003
ISSN号: 0963-9292
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27429
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, Hubei, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou, Guangdong, Peoples R China
3.Grad Univ Chinese Acad Sci, Beijing, Peoples R China
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