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Biotoxicity of TiO 2 Nanoparticles on Raphidocelis subcapitata Microalgae Exemplified by Membrane Deformation

Author

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  • Merve Ozkaleli

    (Department of Environmental Engineering, Faculty of Engineering, Akdeniz University, Antalya 07058, Turkey)

  • Ayca Erdem

    (Department of Environmental Engineering, Faculty of Engineering, Akdeniz University, Antalya 07058, Turkey)

Abstract

TiO 2 nanoparticles (NPs), which are mainly used in consumer products (mostly cosmetics), have been found to cause ecotoxic effects in the aquatic environment. The green algae Raphidocelis subcapitata , as a representative of primary producers of the freshwater ecosystem, has been frequently used to study the effects of metal oxide NPs. An ecotoxicity study was conducted herein to investigate the effects of TiO 2 NPs on survival and membrane deformation of algal cells. Five different concentrations of nano-TiO 2 particles (1, 10, 50, 100 and 500 mg/L) were prepared in synthetic surface water samples with five different water quality characteristics (pH 6.4–8.4, hardness 10–320 mg CaCO 3 /L, ionic strength 0.2–8 mM, and alkalinity 10–245 mg CaCO 3 /L). Results showed a significant increase in the hydrodynamic diameter of NPs with respect to both NP concentrations and ionic content of the test system. A soft synthetic freshwater system at pH 7.3 ± 0.2 appeared to provide the most effective water type, with more than 95% algal mortality observed at 50, 100 and 500 mg/L NP concentrations. At high exposure concentrations, increased malondialdehyde formations were observed. Moreover, due to membrane deformation, TEM images correlated the uptake of the NPs.

Suggested Citation

  • Merve Ozkaleli & Ayca Erdem, 2018. "Biotoxicity of TiO 2 Nanoparticles on Raphidocelis subcapitata Microalgae Exemplified by Membrane Deformation," IJERPH, MDPI, vol. 15(3), pages 1-12, February.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:3:p:416-:d:133782
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    References listed on IDEAS

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    1. Xiaomin Li & Suyang Zhou & Wenhong Fan, 2016. "Effect of Nano-Al 2 O 3 on the Toxicity and Oxidative Stress of Copper towards Scenedesmus obliquus," IJERPH, MDPI, vol. 13(6), pages 1-15, June.
    2. Yuanyuan Zhang & Yu-Rui Leu & Robert J. Aitken & Michael Riediker, 2015. "Inventory of Engineered Nanoparticle-Containing Consumer Products Available in the Singapore Retail Market and Likelihood of Release into the Aquatic Environment," IJERPH, MDPI, vol. 12(8), pages 1-27, July.
    3. Agnes G. Oomen & Eric A. J. Bleeker & Peter M. J. Bos & Fleur Van Broekhuizen & Stefania Gottardo & Monique Groenewold & Danail Hristozov & Kerstin Hund-Rinke & Muhammad-Adeel Irfan & Antonio Marcomin, 2015. "Grouping and Read-Across Approaches for Risk Assessment of Nanomaterials," IJERPH, MDPI, vol. 12(10), pages 1-20, October.
    4. Peter M. J. Bos & Stefania Gottardo & Janeck J. Scott-Fordsmand & Martie Van Tongeren & Elena Semenzin & Teresa F. Fernandes & Danail Hristozov & Kerstin Hund-Rinke & Neil Hunt & Muhammad-Adeel Irfan , 2015. "The MARINA Risk Assessment Strategy: A Flexible Strategy for Efficient Information Collection and Risk Assessment of Nanomaterials," IJERPH, MDPI, vol. 12(12), pages 1-15, November.
    5. Alina Martirosyan & Yves-Jacques Schneider, 2014. "Engineered Nanomaterials in Food: Implications for Food Safety and Consumer Health," IJERPH, MDPI, vol. 11(6), pages 1-31, May.
    6. Sondra S. Teske & Corrella S. Detweiler, 2015. "The Biomechanisms of Metal and Metal-Oxide Nanoparticles’ Interactions with Cells," IJERPH, MDPI, vol. 12(2), pages 1-23, January.
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    Cited by:

    1. Hugh J. Byrne & Sourav P. Mukherjee & Pratap C. Naha, 2018. "Nano–Bio Interactions: Nanomedicine and Nanotoxicology," IJERPH, MDPI, vol. 15(6), pages 1-3, June.
    2. David M. Metzler & Ayca Erdem & Chin Pao Huang, 2018. "Influence of Algae Age and Population on the Response to TiO 2 Nanoparticles," IJERPH, MDPI, vol. 15(4), pages 1-16, March.

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