Research Article
Arsenic Mobility in As-Containing Soils from Geogenic Origin: Fractionation and Leachability
Table 1
Soil pH, pseudo-total Fe, Mn, and As content, and As fractionation in soil samples following the SEP procedure described by Lombi et al. (1999).
| | Sample | pH |
(%) |
(mg kg−1) |
(mg kg−1) | F1
(mg kg−1) | F2
(mg kg−1) | F3
(mg kg−1) | F4
(mg kg−1) | F5
(mg kg−1) | F6
(mg kg−1) |
| | 1 | 6.4 | 2.2 | 313 | 489 | 0.13 (0.04%) | 12.19 (3.70%) | 20.87 (6.33%) | 86.28 (26.18%) | 123.37 (37.43%) | 86.71 (26.31%) | | 2 | 6.6 | 3.5 | 401 | 387 | 0.16 (0.05%) | 13.74 (3.95%) | 10.44 (3.00%) | 75.50 (21.72%) | 184.79 (53.17%) | 62.91 (18.10%) | | 3 | 7.1 | 4.6 | 533 | 194 | 0.08 (0.04%) | 5.86 (3.49%) | 5.70 (3.39%) | 28.70 (17.08%) | 102.01 (60.71%) | 25.69 (15.29%) | | 4 | 6.8 | 4.5 | 531 | 213 | 0.07 (0.05%) | 6.21 (3.94%) | 5.42 (3.44%) | 29.33 (18.60%) | 92.83 (58.87%) | 23.82 (15.11%) | | 5 | 6.3 | 3.0 | 372 | 359 | 0.09 (0.03%) | 8.82 (2.61%) | 9.33 (2.76%) | 56.89 (16.82%) | 168.76 (49.89%) | 94.35 (27.89%) | | 6 | 6.2 | 3.2 | 324 | 413 | 0.08 (0.02%) | 9.32 (2.44%) | 8.43 (2.21%) | 71.52 (18.76%) | 201.13 (52.75%) | 90.83 (23.82%) | | 7 | 6.0 | 2.9 | 329 | 425 | 0.08 (0.02%) | 9.53 (2.42%) | 9.61 (2.44%) | 77.11 (19.60%) | 225.82 (57.39%) | 71.31 (18.12%) | | 8 | 5.6 | 1.3 | 200 | 169 | 0.06 (0.05%) | 7.21 (5.72%) | 8.12 (6.43%) | 50.21 (39.78%) | 57.98 (45.94%) | 2.68 (2.13%) | | 9 | 6.9 | 6.7 | 2981 | 108 | 0.01 (0.01%) | 3.18 (3.46%) | 2.66 (2.89%) | 14.56 (15.83%) | 43.35 (47.15%) | 28.21 (30.68%) |
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Figures in parentheses in the fractionation analysis indicate percentage of pseudo-total As solubilised in each step.
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