Environmental Analysis Health and Toxicology

The Korean Society of Environmental Health and Toxicology (환경독성보건학회)
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Toxicity Assessment of Titanium (IV) Oxide Nanoparticles Using Daphnia magna (Water Flea)

  • Bang, Seung-Hyuck (Department of Bioprocess Engineering, Chonbuk National University) ;
  • Le, Thai-Hoang (Department of Bioprocess Engineering, Chonbuk National University) ;
  • Lee, Sung-Kyu (Korea Institute of Technology) ;
  • Kim, Pil (Division of Chemical Engineering, Chonbuk National University) ;
  • Kim, Jong-Soo (Department of Bioprocess Engineering, Chonbuk National University) ;
  • Min, Ji-Ho (Department of Bioprocess Engineering, Chonbuk National University)
  • Received : 2010.09.14
  • Accepted : 2010.12.02
  • Published : 2011.01.01
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Abstract

Objectives: Titanium dioxide ($TiO_2$), a common nanoparticle widely used in industrial production, is one of nano-sized materials. The purpose of this study was to determine the acute and chronic toxicity of $TiO_2$ using different size and various concentrations on Daphnia magna. Methods: In the acute toxicity test, four concentrations (0, 0.5, 4, and 8 mM) for $TiO_2$ with 250 or 500 nm and five concentrations (0, 0.25, 0.5, 0.75, and 1 mM) for $TiO_2$ with 21 nm were selected to analyze the toxic effect to three groups of ten daphnia neonates over 96 hours. In addition, to better understand their toxicity, chronic toxicity was examined over 21 days using 0, 1, and 10 mM for each type of $TiO_2$. Results: Our results showed that all organisms died before the reproduction time at a concentration of 10 mM of $TiO_2$. In addition, the exposure of anatase (21 nm) particles were more toxic to D. magna, comparing with that of anatase (250 nm) and rutile (500 nm) particles. Conclusions: This study indicated that $TiO_2$ had adverse impacts on the survival, growth and reproduction of D. magna after the 21days exposure. In addition, the number of test organisms that were able to reproduce neonates gradually were reduced as the size of $TiO_2$ tested was decreased.

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References

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