Trace Elements in West Virginia Coals
Cadmium (Cd) Summary Statistics
A histogram of cadmium in all West Virginia coal beds shows
a very narrow distribution of values with a mean of 0.096 ppm (±
0.131 ppm) on a whole coal basis. Isolated coal samples contained higher
values up to 1.29 ppm, in a bench of the Winifrede coal. Cadmium
did not correlate with ash yield, total sulfur or pyritic sulfur, but correlated
poorly with zinc (Zn) (r = +0.6250) and lead (Pb) (r = +0.5265) reflecting
known relationships between these elements in the mineral sphalerite
(ZnS) in coal. Cadmium and lead are frequently present in minor amounts
in solid solution in sphalerite.
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