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Impact of humic acid on the fate and toxicity of titanium dioxide nanoparticles in Tetrahymena pyriformis and zebrafish embryos

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Abstract

The extensive usage of titanium dioxide (TiO2) nanoparticles in daily usage products have increased their release into the environment. The present study has attempted to investigate the behaviour of titanium dioxide (TiO2) nanoparticles in different experimental buffers in the presence of humic acid. Also, the effect of TiO2 nanoparticles was assessed in different aquatic organisms with and without the presence of humic acid. The results demonstrate that humic acid increases the dispersion of TiO2 nanoparticles via its adsorption on the surface of the nanoparticles, mainly due to electrostatic interactions. The maximum aggregation was observed in the zebrafish growth medium (E3 medium) even in the presence of humic acid. The intensity of TiO2 nanoparticle sedimentation was observed in the order: E3 media > Dryl’s buffer > MilliQ water. Interestingly, the ecotoxicity results for Tetrahymena pyriformis and Danio rerio showed that the presence of humic acid reduces the toxicity of TiO2 nanoparticles.

Graphical abstract: Impact of humic acid on the fate and toxicity of titanium dioxide nanoparticles in Tetrahymena pyriformis and zebrafish embryos

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Publication details

The article was received on 20 Jun 2018, accepted on 18 Jul 2018 and first published on 17 Aug 2018


Article type: Paper
DOI: 10.1039/C8NA00053K
Citation: Nanoscale Adv., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    Impact of humic acid on the fate and toxicity of titanium dioxide nanoparticles in Tetrahymena pyriformis and zebrafish embryos

    G. S. Gupta, K. Kansara, H. Shah, R. Rathod, D. Valecha, S. Gogisetty, P. Joshi and A. Kumar, Nanoscale Adv., 2019, Advance Article , DOI: 10.1039/C8NA00053K

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