The Effect of TiO2 Nanoparticles on the Aquatic Ecosystem: A Comparative Ecotoxicity Study with Test Organisms of Different Trophic Levels

Fekete-Kertész, Idlikó; Maros, Gergő; Gruiz, Katalin; Molnár, Mónika

doi:10.3311/ppch.8869

Cited by 16 publications

(6 citation statements)

References 45 publications

(52 reference statements)

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“…The susceptibility values of P. subcapitata towards NPs in terms of LC50 (Lethal Concentration, 50%) were found to be 0.19 mg/L (n-Ag), 0.54 mg/L (n-Cu), 8.30 mg/L (n-Al), and 0.35 mg/L (n-Ni), and it was confirmed that P. subcapitata was the most sensitive organism to Ni NPs. Fekete-Kertész et al [ 45 ] showed a 32–50% inhibition of P. subcapitata when organisms were treated with 3.13–25 mg/L TiO 2 NP concentrations, and a greater NP toxicity effect caused by high NP concentration of 50 mg/L. The effect of two TiO 2 NPs (anatase and rutile) on the growth of P. subcapitata using different exposure systems was reported by Manier et al [ 46 ].…”

Section: Resultsmentioning

confidence: 88%

Biotoxicity of TiO2 Nanoparticles on Raphidocelis subcapitata Microalgae Exemplified by Membrane Deformation

Özkaleli

Erdem

2018

IJERPH

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TiO2 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 TiO2 NPs on survival and membrane deformation of algal cells. Five different concentrations of nano-TiO2 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 CaCO3/L, ionic strength 0.2–8 mM, and alkalinity 10–245 mg CaCO3/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.

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Section: Resultsmentioning

confidence: 88%

Biotoxicity of TiO2 Nanoparticles on Raphidocelis subcapitata Microalgae Exemplified by Membrane Deformation

Özkaleli

Erdem

2018

IJERPH

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“…Assessing ecotoxicity of TiO 2 -NPs against bioluminescent bacterium (Aliivibrio fischeri), algae (Pseudokirchneriella subcapitata, Scenedesmus subspicatus, and Chlorella vulgaris), protozoon (Tetrahymena pyriformis), water flea (Daphnia magna), and an aquatic macrophyte, Lemna minor [29] revealed these organisms showed significant behavioral and physiological changes when exposed to low TiO 2 -NP concentrations (0.1 and 0.05 μg/L), thus demonstrated the ability of TiO 2 -NPs to alter molecular pathways via which these organisms obtained vital nutrition for growth and synthesis of compounds (i.e., chlorophyll, etc. ).…”

Section: Titanium Dioxide Nanoparticlesmentioning

confidence: 99%

The Potential Application of Nanoparticles on Grains during Storage: Part 2 – An Overview of Inhibition against Fungi and Mycotoxin Biosynthesis

Nsengumuremyi¹,

Adadi²,

Oppong³

et al. 2020

Mycotoxins and Food Safety

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Mycotoxins are secondary metabolites synthesized by filamentous fungi. They are common food contaminants that cause mycotoxicosis in humans and animals. Due to the severity of health risk pose by these mycotoxins, many countries have enacted strict measures to curb this menace. One promising measure is the use of nanoparticles. Herein, we present an overview of the application of titanium dioxide, chitosan, ultradisperse humic sapropel suspension, and carbon-based nanoparticles, a novel and innovative method of reducing mycotoxin production and the subsequent contamination of grains. All nanoparticles considered enhanced cell permeability by disrupting the membrane, resulting in the outflow of cellular materials. However, concentration, volume, type, and illumination (sunlight) influenced the fungicidal potential of NPs.

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“…Previous studies have revealed that treatments with 12.5, 25, and 50 mg/L nTiO 2 decreased the growth rate of Chlorella vulgaris by 33%, 36%, and 49%, respectively (Fekete‐Kertész, Maros, Gruiz, & Molnár, 2016). Chronic exposure to 1.78 mg/L nTiO 2 resulted in the collapse of Daphnia magna populations after five generations (Jacobasch et al, 2014).…”

Section: Introductionmentioning

confidence: 97%

Effects of TiO₂ nanoparticles on the life‐table parameters, antioxidant indices, and swimming speed of the freshwater rotifer Brachionus calyciflorus

et al. 2020

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Titanium dioxide nanoparticles (nTiO2) have raised environmental concerns and display potential hazards to aquatic organisms and even humans. However, only a few reports tested the toxicity of nTiO2 to rotifers. In the present study, acute and chronic toxicity of nTiO2 to the freshwater rotifer Brachionus calyciflorus was investigated at different temperatures. At 25°C, the 24 and 48‐hr LC50 was 117.14 and 60.11 mg/L, respectively. At 15°C, 20°C, 25°C, and 30°C, exposure to nTiO2 significantly decreased life expectancy at birth, net reproductive rate, generation time, average lifespan, and/or intrinsic rate of population increase of B. calyciflorus (p < .05). High temperature enhanced the toxicity of nTiO2 to rotifers. The swimming linear speed of rotifers significantly increased (p < .05) in treatments with 200 µg/L nTiO2, compared with the control. In addition, treatments with 8 µg/L to 5 mg/L nTiO2 significantly increased superoxide dismutase activity (p < .05). Glutathione content and catalase activity increased significantly after exposure to 8 µg/L nTiO2 but decreased significantly in treatments with nTiO2 concentrations ranging from 40 µg/L to 5 mg/L (p < .05). There were no significant changes in malondialdehyde contents among nTiO2 treatments and control. Overall, the present study indicated that nTiO2 revealed high toxicity to rotifers, displaying high environmental risks to aquatic ecosystems.

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The Effect of TiO2 Nanoparticles on the Aquatic Ecosystem: A Comparative Ecotoxicity Study with Test Organisms of Different Trophic Levels

Abstract: Abstract

Cited by 16 publications

References 45 publications

Biotoxicity of TiO2 Nanoparticles on Raphidocelis subcapitata Microalgae Exemplified by Membrane Deformation

Biotoxicity of TiO2 Nanoparticles on Raphidocelis subcapitata Microalgae Exemplified by Membrane Deformation

The Potential Application of Nanoparticles on Grains during Storage: Part 2 – An Overview of Inhibition against Fungi and Mycotoxin Biosynthesis

Effects of TiO₂ nanoparticles on the life‐table parameters, antioxidant indices, and swimming speed of the freshwater rotifer Brachionus calyciflorus

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The Effect of TiO2 Nanoparticles on the Aquatic Ecosystem: A Comparative Ecotoxicity Study with Test Organisms of Different Trophic Levels

Abstract: Abstract

Cited by 16 publications

References 45 publications

Biotoxicity of TiO2 Nanoparticles on Raphidocelis subcapitata Microalgae Exemplified by Membrane Deformation

Biotoxicity of TiO2 Nanoparticles on Raphidocelis subcapitata Microalgae Exemplified by Membrane Deformation

The Potential Application of Nanoparticles on Grains during Storage: Part 2 – An Overview of Inhibition against Fungi and Mycotoxin Biosynthesis

Effects of TiO2 nanoparticles on the life‐table parameters, antioxidant indices, and swimming speed of the freshwater rotifer Brachionus calyciflorus

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Product

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Effects of TiO₂ nanoparticles on the life‐table parameters, antioxidant indices, and swimming speed of the freshwater rotifer Brachionus calyciflorus