Children who live near coal-fired power plants are exposed to coal
fly ash, which is stored in landfills and surface impoundments near
residential communities. Fly ash has the potential to be released
as fugitive dust. Using data collected from 263 children living within
10 miles of coal ash storage facilities in Jefferson and Bullitt Counties,
Kentucky, USA, we quantified the elements found in nail samples. Furthermore,
using principal component analysis (PCA), we investigated whether
metal(loid)s that are predominately found in fly ash loaded together
to indicate potential exposure to fly ash. Concentrations of several
neurotoxic metal(loid)s, such as chromium, manganese, and zinc, were
higher than concentrations reported in other studies of both healthy
and environmentally exposed children. From PCA, it was determined
that iron, aluminum, and silicon in fly ash were found to load together
in the nails of children living near coal ash storage facilities.
These metal(loid)s were also highly correlated with each other. Last,
results of geospatial analyses partially validated our hypothesis
that children’s proximity to power plants was associated with
elevated levels of concentrations of fly ash metal(loid)s in nails.
Taken together, nail samples may be a powerful tool in detecting exposure
to fly ash.