Sample # | Surface area (m2/g)c
| Hydroxyl radical generation at 30 min (μmol/m2)c
| Iron release at 7d (μmol/m2) |
---|
10 min | 30 min | 60 min | Fe2+
| Fe3+
| Total Fe |
---|
INGV_1 | 0.27 | 1.39 | 2.87 | 3.71 | 83.9 | 680.8 | 745.2 |
INGV_4 | 0.10 | 1.12 | 2.98 | 5.06 | 326.8 | 701.2 | 1028.0 |
INGV_5 | 0.13 | 1.35 | 3.08 | 7.02 | 77.8 | 583.3 | 661.1 |
INGV_8 | 0.08 | 1.68 | 3.52 | 6.75 | 226.9 | 1120.3 | 1347.2 |
ETNA4/11/02a
| 0.19b
| | 4.72a
| 5.03a
| | | 502.5a
|
MON5/6/99a
| 1.28b
| | 0.58a
| 0.58a
| | | 25.5a
|
CER30/11/95a
| 0.47b
| | 2.03a
| 2.22a
| | | 238.3a
|
PIN4/7/91a
| 0.89b
| | 1.88a
| 2.06a
| | | 29.9a
|
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aThese samples were used by Horwell et al. (2007) and have since been reanalysed on up to seven separate occasions, including for this study. The hydroxyl radical and iron release data presented here are the averages of these analyses. The original data in Horwell et al. (2007) for the Etna sample were 9.7 μmol/m2 for hydroxyl radical generation at 30 min and 655.1 μmol/m2 for total iron release at 7 days, and all data collected following that publication were less than these values
-
bSurface area data from Horwell et al. (2007)
-
cData are the average of three runs for the samples in this study