Toxicity of various silver nanoparticles compared to silver ions in Daphnia magna

Journal of Nanobiotechnology

Research

Yong Seok Kim¹  Min Chaul Moon¹  Ji Hyun Lee¹  Hyun Jung Choi¹  Yong Bae Jeon¹  Il Je Yu²  Saba Asghari³  Seyed Ali Johari³ 

[1] Institute of Nanoproduct Safety Research, Hoseo University, Asan, Korea;Institute of Nanoproduct Safety Research, Hoseo University, Asan, Korea;Institute of Nanoproduct Safety Research, Hoseo University, 165 Sechul-ri, 336-795, Baebang-myun, Asan, Korea;Young Researchers Club, Science and Research Branch, Islamic Azad University, Tehran, Iran;Institute of Nanoproduct Safety Research, Hoseo University, Asan, Korea;

关键词: Daphnia magna;    Silver;    Nanoparticle;    Colloid;    Ion;    Acute toxicity;   

DOI  :  10.1186/1477-3155-10-14

 received in 2011-12-31, accepted in 2012-04-02,  发布年份 2012

来源: Springer

【 摘 要 】

BackgroundTo better understand the potential ecotoxicological impacts of silver nanoparticles released into freshwater environments, the Daphnia magna 48-hour immobilization test was used.MethodsThe toxicities of silver nitrate, two types of colloidal silver nanoparticles, and a suspension of silver nanoparticles were assessed and compared using standard OECD guidelines. Also, the swimming behavior and visible uptake of the nanoparticles by Daphnia were investigated and compared. The particle suspension and colloids used in the toxicity tests were well-characterized.ResultsThe results obtained from the exposure studies showed that the toxicity of all the silver species tested was dose and composition dependent. Plus, the silver nanoparticle powders subsequently suspended in the exposure water were much less toxic than the previously prepared silver nanoparticle colloids, whereas the colloidal silver nanoparticles and AgNO3 were almost similar in terms of mortality. The silver nanoparticles were ingested by the Daphnia and accumulated under the carapace, on the external body surface, and connected to the appendages. All the silver species in this study caused abnormal swimming by the D. magna.ConclusionAccording to the present results, silver nanoparticles should be classified according to GHS (Globally Harmonized System of classification and labeling of chemicals) as "category acute 1" to Daphnia neonates, suggesting that the release of nanosilver into the environment should be carefully considered.

【 授权许可】

Unknown   
© Asghari et al; licensee BioMed Central Ltd. 2012. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.