Research Article
Using Lead Concentrations and Stable Lead Isotope Ratios to Identify Contamination Events in Alluvial Soils
Table 2
Soil properties and lead concentrations in soil samples collected at contamined sites (MAS-13, STO-6) and uncontaminated site (RIC-9).
| Soil Profile | Depth (cm) | pH | Total organic carbon (%) | Textural clas | Pb (mg kg−1) |
| Contaminated sites | | | | | | MAS-13 | | | | | | | 0–20 | 6.09 | 0.31 | FSL | 18.73 | | 20–40 | 5.50 | 0.30 | FSL | 18.38 | | 40–60 | 5.37 | 0.34 | FSL | 22.38 | | 60–80 | 5.59 | 0.54 | FSL | 17.79 | | 80–100 | 5.46 | 0.12 | FSL | 19.18 | | 100–120 | 5.24 | 0.42 | FSL | 21.84 | | 120–140 | 3.83 | 0.85 | FLS | 36.34 | | 140–160 | 3.63 | 0.95 | FLS | 49.65 | | 160–180 | 4.07 | 0.75 | FLS | 42.18 | | 180–200 | 3.45 | 0.72 | FLS | 121.80 | | 200–220 | 3.45 | 1.02 | SL | 149.13 | | 220–240 | 3.97 | 0.55 | MFS | 22.41 |
| STO-6 | | | | | | | 0–20 | 5.03 | 1.48 | FSL | 25.25 | | 20–40 | 4.77 | 1.21 | FSL | 35.74 | | 40–60 | 4.43 | 0.63 | FSL | 37.29 | | 60–80 | 4.28 | 0.71 | FSL | 30.57 | | 80–100 | 4.56 | 0.36 | FSL | 12.32 |
| Uncontaminated site (without hydrocarbons layer) | | | | | | RIC-9 | | | | | | | 0–20 | 5.38 | 1.44 | FSL | 25.73 | | 20–40 | 5.26 | 1.25 | FSL | 34.38 | | 40–60 | 4.71 | 1.10 | FSL | 34.88 |
| Maximum value | — | 6.09 | 1.48 | — | 149.13 | Minimum value | — | 3.45 | 0.12 | — | 12.32 | Average value | — | 4.70 | 0.75 | — | 38.80 |
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: FSL: Fine sandy loam; FLS: Fine loamy sand; SL: Sandy loam; MFS: Medium fine sand (see [24]).
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