Analytical Measurements of Nanoparticles in Challenging and Complex Environments

Nelson, Bryant C.; Reipa, Vytas

doi:10.1002/9783527800308.ch9

Metrology and Standardization of Nanotechnology 2017

DOI: 10.1002/9783527800308.ch9

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Analytical Measurements of Nanoparticles in Challenging and Complex Environments

Bryant C. Nelson

Vytas Reipa

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Cited by 2 publications

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References 90 publications

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“…First, it is the comprehensive NP characterization, preferably in the biological test media. Multiple techniques and dedicated instruments are now available for this purpose [30]. Removal of NPs using separation methods such as precipitation, filtering, centrifugation, or careful washing prior to the biological assay is very effective in minimizing artifacts.…”

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confidence: 99%

Nanomaterials and Oxidative Stress

Reipa

Atha

2018

Challenges

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With the rapid development of new nanomaterials, it was recognized early that together with their beneficial properties, nanomaterials may pose a risk to human health and the environment. Evidence has accumulated over the last twenty years in support of oxidative stress as a broad mechanistic concept to explain the interaction of engineered nanoparticles with biological substances. As oxidative stress as a physiological response was recognized in redox biology, its wide-ranging use in nanotoxicology has exposed new challenges and limitations. In this commentary, we review certain oxidative stress concepts and their relevance to nanotoxicology.

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confidence: 99%

Nanomaterials and Oxidative Stress

Reipa

Atha

2018

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Environmental significance of the interaction between titanium dioxides and soil solutions

Solymos,

Babcsányi,

Ariya

et al. 2024

Environ Sci Eur

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Nanotechnology, especially in the field of photocatalysis, has witnessed rapid advancements, with titanium dioxide being one of the most widely used photocatalysts. As the use of products containing photoactive nanomaterials increases, concerns have arisen regarding their potential release into the environment over time. This release can impact soil, groundwater, and surrounding ecosystems, resulting in nanoparticles being dispersed in water and eventually depleted from the system. This study aimed to investigate how different soil solutions affect the structural, textural properties, and photocatalytic activity of titanium dioxide-based, commercial reference Evonik Aeroxide P25. The Regosol soil solution, characterized by acidic pH, low ionic content, and high organic matter content, induced nanoparticle aggregation and bandgap changes. In addition, the acidic pH hindered the adsorption process, potentially affecting the photocatalytic processes. In contrast, the Chernozem soil solution, with slightly alkaline pH, high ionic content, and low organic matter content, did not significantly alter the morphology or structure of the material. However, various organic compounds were absorbed on the surface, reducing the availability of active sites. The study highlights the importance of understanding the influence of soil solutions on nanomaterials, as it impacts their properties and environmental risks. Results show that the material is still activated, i.e., it can exert its photoactive effect on the environment. This sheds light on the challenges posed by nanoparticles in soil, particularly in terms of their toxicity and consequences for the surrounding ecosystems. The study underlines the need for further research in this area to assess potential risks and optimise the use of nanomaterials in environmental remediation.

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Analytical Measurements of Nanoparticles in Challenging and Complex Environments

Cited by 2 publications

References 90 publications

Nanomaterials and Oxidative Stress

Nanomaterials and Oxidative Stress

Environmental significance of the interaction between titanium dioxides and soil solutions

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