Table 1

Coal Samples
Sample #a
 Origin
 Coal type
 Surface area (m2/g)b
 Sulfur (mass fraction)c
 Pyritic sulfur (mass fraction)c
 Pyritic sulfur content per surface area (g/m2)
 Iron release (μM)d
1635
 Erie, Colorado
 subbituminous
 1.79
 0.3616
 0.00
 0
 0.00
2682b
 Gillette, Wyoming
 subbituminous
 4.94
 0.4917
 0.01
 0.002
 0.02
2692b
 Holden, West Virginia
 bituminous
 1.35
 1.17
 0.49
 0.363
 0.48
2684b
 Marion, Illinois
 bituminous
 2.11
 3.076
 0.52
 0.246
 8.31
2685b
 Captina, West Virginia
 bituminous
 1.72
 4.73
 1.15
 0.669
 13.3

a National Institute of Standards & Technology sample numbers

b BET surface area values are for coal as received and as used in experiments, not dessicated.

c dry basis

d 0.125 m2/L coal loadings, total iron [i.e., Fe(II) & Fe(III)] after 7 hrs in 1.5 mg/L RNA solution

Cohn et al. Particle and Fibre Toxicology 2006 3:16   doi:10.1186/1743-8977-3-16