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Effects of Size, Impurities, and Citrate Capping on the Toxicity of Manufactured Silver Nano-particles to Larval Zebrafish (Danio rerio)
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 Title & Authors
Effects of Size, Impurities, and Citrate Capping on the Toxicity of Manufactured Silver Nano-particles to Larval Zebrafish (Danio rerio)
Kim, Jungkon; Park, Yena; Lee, Sangwoo; Seo, Jihyun; Kwon, Dongwook; Park, Jaehong; Yoon, Tae-Hyun; Choi, Kyungho;
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Objectives: This study was conducted to identify factors determining the toxicity of manufactured silver nano-particles (AgNPs) on aquatic organisms. Methods: For this purpose, we prepared several AgNPs with varied characteristics, including hydrodynamic size (nano--sized-), impurities ( stock vs ), and citrate capping (), using a commercially available manufactured AgNP ( stock). Acute tests were conducted using larval zebrafish (Danio rerioI). In addition, in order to determine the ecotoxicological potentials of various capping agents, toxicity tests were conducted with microbes, waterfleas, and fish for eight different capping agents that are used for NPs. Results: The toxicity of AgNPs in terms of 96 h fish increased in the following order: stock < < -sized- < . After removing impurities by dialysis, 96 h value decreased significantly from (95% confidence intervals [CI]: 107.0-146.2) ( stock) to (CI: 72.7-84.8) (). For -sized- (ranging between 3.9 and 40.6 nm) and (40.6 nm and ), the 96 h of the former (, CI: 36.0-51.7) was approximately two-fold lower than that of the latter (, CI: 73.5-100.3). Conclusions: In this study, we found that for acute lethality, the contribution of impurities and particle size was significant, but that of citrate was negligible.
Danio rerio;gill;nano hazard;particle size;silver nanoparticles;
 Cited by
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