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Assessing Disaster Resilience of Concrete with Titanium Dioxide Nanoparticles
Published on: November 14, 2025
Titanium dioxide in our everyday life; is it safe?
Matej Skocaj1, Metka Filipic, Jana Petkovic
1Jožef Stefan Institute, Department for Nanostructured Materials, Ljubljana, Slovenia.
Radiology and Oncology
|August 31, 2012
Summary
Titanium dioxide nanoparticles (TiO(2)) may cause harm through oxidative stress and inflammation. Due to potential risks, careful use is advised until more human exposure and toxicity data are available.
Area of Science:
- Nanotechnology
- Toxicology
- Environmental Science
Background:
- Titanium dioxide (TiO(2)) nanoparticles, once deemed inert, are now under toxicological scrutiny due to increased manufacturing and usage.
- Studies indicate TiO(2) nanoparticles induce adverse effects primarily through oxidative stress, leading to cell damage, genotoxicity, and inflammation.
- Nanoparticle characteristics significantly influence their bioavailability, reactivity, and the extent of damage caused.
Purpose of the Study:
- To review the toxicological effects of titanium dioxide (TiO(2)) nanoparticles.
- To assess human and environmental exposure risks associated with TiO(2) nanoparticles.
- To identify data gaps in understanding the absorption, distribution, excretion, and toxicity of TiO(2) nanoparticles.
Main Methods:
- Review of mechanistic toxicological studies.
- Analysis of animal inhalation studies and human dermal exposure data.
- Evaluation of environmental toxicity data for aquatic organisms.
Main Results:
- TiO(2) nanoparticles are classified as "possible carcinogenic to humans" and occupational carcinogens.
- Dermal exposure via sunscreens shows negligible penetration, but long-term effects and photo-oxidation products require further study.
- Limited data exist on oral exposure toxicity, and while acute aquatic toxicity is low, sub-lethal effects occur with long-term environmental exposure.
Conclusions:
- TiO(2) nanoparticles exhibit potential adverse effects, including carcinogenicity and environmental harm.
- Further toxicological and human exposure data are crucial for a reliable risk assessment.
- Caution is advised in the use of TiO(2) nanoparticles until comprehensive safety data are established.
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