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Comparative Toxicity of Fly Ash: An In Vitro Study
Elvira Rozhina1, Ilnur Ishmukhametov1, Läysän Nigamatzyanova1
1Bionanotechnology Lab, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kreml Uramı 18, 420008 Kazan, Republic of Tatarstan, Russia.
Molecules (Basel, Switzerland)
|April 3, 2021
Summary
Fly ash microparticles from coal combustion pose health risks. Smaller particles, particularly from Chelyabinsk, showed higher toxicity and DNA damage in human cells, impacting cell viability.
Area of Science:
- Environmental Science
- Toxicology
- Cell Biology
Background:
- Coal combustion produces fly ash, a significant pollutant.
- Data on the cellular impact of micrometer-sized fly ash particles is limited.
- Fly ash composition varies by source, influencing its environmental and health effects.
Purpose of the Study:
- To assess the in vitro toxicity and genotoxicity of fly ash microparticles from diverse origins.
- To investigate the relationship between fly ash particle size, chemical composition, and cellular effects.
- To characterize the interaction of fly ash with human cell lines.
Main Methods:
- Fly ash samples characterized using dynamic light scattering, atomic force, and hyperspectral microscopy.
- In vitro toxicity assessed using HeLa (cervical cancer) and Jurkat (T lymphocyte) cells.
- Genotoxicity evaluated via single-cell electrophoresis and nuclear morphology analysis.
Main Results:
- All fly ash variants induced dose-dependent cytotoxicity in both cell lines.
- Rockdale fly ash showed the highest cytotoxicity in HeLa cells; Chelyabinsk showed the least.
- Chelyabinsk fly ash, the smallest particles, were most cytotoxic to Jurkat cells and genotoxic to HeLa cells.
- Fly ash from Rockdale and Chelyabinsk induced DNA damage and nuclear abnormalities in HeLa cells.
Conclusions:
- Fly ash microparticles exhibit significant in vitro toxicity and genotoxicity.
- Particle size is a critical factor determining fly ash toxicity.
- Specific fly ash sources (e.g., Chelyabinsk) pose greater cellular risks due to smaller particle size and composition.
