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TiO2 nanoparticles enhance bioaccumulation and toxicity of heavy metals in Caenorhabditis elegans via modification of local concentrations during the sedimentation process

文献类型：期刊论文

作者Wang, Jingjing1,2; Dai, Hui2; Nie, Yaguang2; Wang, Mudi2; Yang, Zhen2; Cheng, Lei1,2; Liu, Yun2; Chen, Shaopeng2; Zhao, Guoping2; Wu, Lijun2,3,4
刊名ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
出版日期2018-10-30
卷号162页码:160-169
关键词TiO2 nanoparticles Heavy metals Bioaccumulation Toxicity Caenorhabditis elegans Sedimentation process
ISSN号0147-6513
DOI10.1016/j.ecoenv.2018.06.051
通讯作者Xu, An(anxu@ipp.ac.cn)
英文摘要Unintentionally released titanium dioxide nanoparticles (TiO2 NPs) may co-occur with pre-existing heavy metal pollutants in aquatic environments. However, the interactions between NPs and heavy metals (HMs) and their co-effects in living organisms are largely unknown. The aim of this investigation was to illustrate the influence of TiO2 NPs (5 and 15 nm) on the bioaccumulation and toxicity of cadmium (Cd), arsenate (As(III)), and nickel (Ni) in Caenorhabditis elegans (C. elegans) during the process of sedimentation in aquatic environment. Our data showed that HMs accelerated the aggregation of TiO2 NPs. The rapid aggregation and sedimentation of TiO2 NPs changed the vertical distribution of HMs through adsorption and induced increased and prolonged exposure of benthic species. Aggregate particle size along with ionic strength were the major factors affecting the rate of sedimentation. TiO2 NPs at non-toxic concentrations efficiently enhanced the bioaccumulation and reproductive toxicity of HMs to C. elegans in a dose- and size-dependent manner; however, the effect of TiO2 NPs on As(III) was obviously lower than that on two valence metals. These data provided clear evidence that TiO2 NPs could serve as environmental regulators to significantly facilitate the toxicity and the accumulation of HMs in C. elegans, indicating that the interaction and fate of TiO2 NPs and HMs on their co-toxic responses during the sedimentation should be considered as a necessary and integral part of risk assessment in the ecological system.
WOS关键词TITANIUM-DIOXIDE NANOPARTICLES ; SULFATE-INDUCED APOPTOSIS ; AGGREGATION KINETICS ; DAPHNIA-MAGNA ; PARTICLE-SIZE ; FACTORIAL APPROACH ; OXIDATIVE STRESS ; NANO-TIO2 ; BIOAVAILABILITY ; CADMIUM
资助项目Major National Scientific Research Projects[2014CB932002] ; Strategic Leading Science & Technology Program[XDB14030502] ; National Natural Science Foundation of China[21677147] ; National Natural Science Foundation of China[91743106] ; National Natural Science Foundation of China[21507136] ; National Natural Science Foundation of China[21607157] ; Major / Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology[2017FXZY005]
WOS研究方向Environmental Sciences & Ecology ; Toxicology
语种英语
WOS记录号WOS:000440879500020
出版者ACADEMIC PRESS INC ELSEVIER SCIENCE
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源URL[http://ir.hfcas.ac.cn:8080/handle/334002/37742]  
专题合肥物质科学研究院_技术生物与农业工程研究所
通讯作者Xu, An
作者单位1.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Anhui Prov Key Lab Environm Toxicol & Pollut Cont, Hefei Inst Phys Sci, Key Lab High Magnet Field & Ion Beam Phys Biol, Hefei 230031, Anhui, Peoples R China
3.Anhui Univ, Inst Phys Sci, Hefei 230601, Anhui, Peoples R China
4.Anhui Univ, Inst Informat Technol, Hefei 230601, Anhui, Peoples R China
5.Univ Sci & Technol China, Sch Life Sci, Hefei 230027, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Jingjing,Dai, Hui,Nie, Yaguang,et al. TiO2 nanoparticles enhance bioaccumulation and toxicity of heavy metals in Caenorhabditis elegans via modification of local concentrations during the sedimentation process[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2018,162:160-169.
APA Wang, Jingjing.,Dai, Hui.,Nie, Yaguang.,Wang, Mudi.,Yang, Zhen.,...&Xu, An.(2018).TiO2 nanoparticles enhance bioaccumulation and toxicity of heavy metals in Caenorhabditis elegans via modification of local concentrations during the sedimentation process.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,162,160-169.
MLA Wang, Jingjing,et al."TiO2 nanoparticles enhance bioaccumulation and toxicity of heavy metals in Caenorhabditis elegans via modification of local concentrations during the sedimentation process".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 162(2018):160-169.

入库方式： OAI收割

来源：合肥物质科学研究院

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