Navajo Coal Combustion and Respiratory Health Near Shiprock, New Mexico
Table 4
Trace element concentrations (ppm) from coal samples taken from the Four Corners mine (BHP), Black Mesa, and five residences in or near Shiprock, New Mexico. Mean concentrations of trace metals in US coals [23] are in the final column for comparison.
element
BHP
Black Mesa
Nav51
Nav56
Nav69
Nav78
Nav151
mean US coal
arsenic (As)
0.272
0.603
0.481
0.571
0.329
0.48
0.363
24.0
beryllium (Be)
0.807
0.103
1.13
0.101
0.744
0.465
0.559
2.20
chromium (Cr)
3.20
2.26
9.83
3.66
2.71
2.33
4.05
15.0
cadmium (Cd)
0.021
0.007
0.069
0.009
0.015
0.013
0.018
0.470
lead (Pb)
9.76
0.829
19.
0.730
5.46
1.08
4.14
11.0
manganese (Mn)
10.0
1.93
10.0
3.60
6.93
5.13
9.56
43.0
mercury (Hg)
0.016
0.026
0.027
0.029
0.015
0.02
0.120
0.170
nickel (Ni)
2.21
2.21
3.47
2.86
2.09
1.60
3.07
14.0
selenium (Se)
1.70
0.770
2.40
1.40
1.70
1.30
0.650
2.80
antimony (Sb)
0.512
0.058
0.496
0.116
0.304
0.234
0.318
1.20
cobalt (Co)
2.57
0.568
5.13
0.74
2.58
0.973
1.78
15.0
a. Only one element (lead) in one sample (Nav51) exceeded the U.S. average values in coal for these hazardous air pollutants.
