Research Article
Trace Element Concentration and Speciation in Selected Mining-Contaminated Soils and Water in Willow Creek Floodplain, Colorado
Table 14
Sequential fractionation of As in study soils.
| Soil | Depth |
AsWS |
AsEX | |
AsOX | |
AsRES | | (cm) | mg/kg | (mg/kg) |
| Gravelbar | 0–73 | 0.6 | 1.8 | 15.4 | 70.5 | 4.6 | 53.2 | 146 | Cottonwood | 0–90 | 0.2 | 0.3 | 3.5 | 34.0 | 2.3 | 15.6 | 56 | Spruce | 0–10 | 0.7 | 2.2 | 25.7 | 143.7 | 8.7 | 70.7 | 252 | | 10–40 | 0.9 | 2.7 | 25.0 | 214.5 | 8.0 | 103.9 | 355 | Railroad | 0–61 | 5.7 | 7.6 | 18.6 | 520.5 | 10.3 | 294.5 | 857 | | 61–120 | 2.2 | 10.4 | 24.7 | 187.5 | 5.5 | 151.2 | 381 | Western Channel | 0–40 | 0.8 | 4.2 | 23.6 | 125.8 | 15.6 | 77.1 | 247 | Salty | 0–20 | 0.3 | 1.6 | 23.9 | 180.2 | 3.8 | 80.0 | 290 | North | 0–40 | 0.5 | 3.4 | 25.2 | 169.9 | 8.8 | 78.5 | 286 | South | 0–40 | 4.5 | 4.2 | 21.8 | 83.4 | 2.3 | 95.1 | 211 | Denuded Mound | 0–40 | 0.1 | 0.5 | 10.2 | 73.4 | 1.5 | 34.2 | 120 | Sedge Mound | 0–40 | 0.3 | 0.5 | 2.3 | 21.9 | 1.7 | 10.6 | 37 |
|
|
.
|