Effects of ionic strength on physicochemical properties and toxicity of silver nanoparticles

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Effects of ionic strength on physicochemical properties and toxicity of silver nanoparticles
	Yang, Yaning ; Xu, Shengmin ; Xu, Guangmin ; Liu, Rui ; Xu, An ; Chen, Shaopeng ; Wu, Lijun
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-01-10
卷号	647 页码:1088-1096
关键词	Silver nanoparticles Ionic strength Transformation Toxicity Caenorhabditis elegans
ISSN号	0048-9697
英文摘要	In the environment, silver nanoparticles (AgNPs) undergo a number of potential transformations, such as aggregation, dissolution, and redox reactions. However, the transformation in ionic strength condition, as well as their related toxicity was not quite clear, especially in the in vivo system. In the present study, we comprehensively evaluated three different characteristics (ddH(2)O, EPA water and K+ medium (KM)) mediated changes in the physical morphology of AgNPs and the alteration of the toxicity to Caenorhabditis elegans (C. elegans). Our results showed besides the changes of AgNPs behavior such as the transformation of morphological, with the transmission electron microscopy we found for the first time that smaller nanoparticles (<5 nm) appeared around the pristine AgNPs after incubation in EPA or KM for 5 days. Together with these changes, the toxicity of AgNPs to C. elegans changed significantly, showing that a higher ionic strength medium resulted in greater toxicity to C. elegans, as measured by germ cell apoptosis, brood size and lifespan. More importantly, our results indicated that the higher toxicity of AgNPs to C. elegans reproduction was probably related to the appearance of the smaller-size AgNPs in higher ionic strength media. These findings highlight that toxicity assessments for the release of nanomaterial to the environment need to be improved to assess environmental safety more accurately. (C) 2018 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42934]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
作者单位	1.Univ Sci & Technol China, Dept Environm Sci & Optoelect Technol, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 3.Key Lab Environm Toxicol & Pollut Control Technol, Hefei 230031, Anhui, Peoples R China 4.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Anhui, Peoples R China 5.Chinese Acad Sci, Hefei Inst Phys Sci, Key Lab High Magnet Field & Ion Beam Phys Biol, POB 1138, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yaning,Xu, Shengmin,Xu, Guangmin,et al. Effects of ionic strength on physicochemical properties and toxicity of silver nanoparticles[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,647:1088-1096.
APA	Yang, Yaning.,Xu, Shengmin.,Xu, Guangmin.,Liu, Rui.,Xu, An.,...&Wu, Lijun.(2019).Effects of ionic strength on physicochemical properties and toxicity of silver nanoparticles.SCIENCE OF THE TOTAL ENVIRONMENT,647,1088-1096.
MLA	Yang, Yaning,et al."Effects of ionic strength on physicochemical properties and toxicity of silver nanoparticles".SCIENCE OF THE TOTAL ENVIRONMENT 647(2019):1088-1096.