Absorption - Inhalation
- Aluminum (Al)
Exposure of rats to a fly ash that was 9.7% Al and had a MMAD of 3 μm
resulted in a deposition fraction of 5.1% (Matsuno,
Tanaka et al. 1986). Lung and pulmonary deposition of Al were 9.8
and 7.9% for spherical monodisperse aluminosilicate particles with a
diameter of 2.2 μm (Raabe, Yeh et al. 1977). Al deposition into rat
lung after exposure to power plant fly ash with a mass median
aerodynamic diameter (MMAD) of ~ 2 μm was 11.8% (Raabe, Tyler et al.
1982). The calculated percentage of Al in fly ash that deposited in
the lung was calculated from the amount of Al in the lung of rats
after exposure to 73 mg fly ash/m3 for 23 hours/day x 5 days/week for
1 month (Tanaka, Matsuno et al. 1983). The deposition fraction was
1.8%. The authors attribute the differences to particle diameter,
noting a smaller apparent deposition fraction with larger particles.
Based on studies in plants involving Al refining, casting and pressure
molding it was concluded that environmental Al concentration, article
size, allotropic state, solubility and the pattern of exposure
affected lung Al absorption (Apostoli, Lucchini et al. 1992).
Link to Absorption
Link to Aluminum (Al) Index
Link to Database Index