Table 7 |
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|
Measured iron concentrations (μg/L) in 0.2-μm filtrate in different treatments |
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|
Test ID |
Alluvium/J-13 |
Devitrified tuff/J-13 |
Zeolitic tuff/TCU |
Carbonate/LCA |
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|
|
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|
J-13 Control |
Blank |
Sorption |
Blank |
Sorption |
Control |
Blank |
Sorption |
Control |
Blank |
Sorption |
|
|
|
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|
A |
NDa |
1038 ± 1520 |
ND |
1414 ± 221 |
557 ± 435 |
ND |
27,752 ± 5,894 |
26,328 ± 4,882 |
ND |
ND |
106 ± 36 |
|
B |
ND |
703 ± 957 |
15.0 ± 5.7 |
98.5 ± 7.2 |
260 ± 347 |
ND |
5,545 ± 4,139 |
4,465 ± 3,050 |
ND |
6.94 ± 5.00 |
12.4 ± 21.6 |
|
C |
160 ± 118 |
219 ± 32.7 |
32.1 ± 20.4 |
639 ± 634 |
108 ± 46.3 |
ND |
123 |
3,539 ± 3,136 |
ND |
16.0 ± 10.2 |
6.47 ± 11.6 |
|
Db |
891 ± 1193 |
90.0 ± 60.4 |
5.65 ± 4.65 |
230 ± 86 |
279 ± 149 |
958 ± 1,371 |
2,185 ± 1,624 |
1,307 ± 1,330 |
187 ± 224 |
ND |
171 ± 254 |
|
E |
ND |
865 ± 489 |
9.84 ± 13.7 |
199 ± 74.0 |
82.5 ± 20.8 |
ND |
4,734 ± 491 |
5,475 ± 4,227 |
27.3 ± 17.7 |
ND |
33.5 ± 5.56 |
|
|
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|
a ND: not detected; below the detection limit of about 5 μg/L. b"11 ppm" FeCl2 was added into both background and tracer sorption solutions used in Test D. Measured Fe2+ concentrations in the control samples are in the range of 0.2 to 1 ppm, which is consistent with the excepted dissolved Fe2+ concentrations from Geochemist's Workbench; the Fe2+ in solution is controlled by the solubility of FeCO3 and/or Fe(OH)2. |
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|
Hu et al. Geochemical Transactions 2008 9:12 doi:10.1186/1467-4866-9-12 |
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