Table 2 Groundwater chemistry of monitoring wells from which colloids were sampled
From: Transformation and fate of Fe(III) in petroleum-hydrocarbon-contaminated soil and groundwater
Parameter | EF–04\(^1\) | R1–12 | R1–11 | M17–08 | M17–07 | |||||
|---|---|---|---|---|---|---|---|---|---|---|
\(^2\)4.59 m | 8.60 m | 12.71 m | 14.18 m | 21.59 m | ||||||
0 (weeks) | 22.5 (weeks) | 0 (weeks) | 22.5 (weeks) | 0 (weeks) | 22.5 (weeks) | 0 (weeks) | 22.5 (weeks) | 0 (weeks) | 22.5 (weeks) | |
Temperature (\(^{\circ }\)C) | 7.91 | 8.99 | 8.89 | 8.57 | 9.91 | 8.66 | 10.35 | 7.34 | 6.49 | 7.80 |
pH | 7.69 | 7.23 | 7.80 | 7.23 | 7.86 | 7.27 | 7.83 | 7.23 | 7.84 | 7.48 |
EC (dS m\(^{-1}\)) | 2.23 | 2.31 | 2.80 | 2.64 | 1.49 | 1.83 | 1.78 | 2.19 | 0.80 | 0.61 |
Eh (mV) | −29.5 | −69.0 | −50.9 | −42.7 | 15.3 | −18.3 | 15.7 | −1.60 | 4.80 | 84.4 |
Organic C (mg L\(^{-1}\)) | 45.00 | 25.00 | 0.10 | 14.00 | 0.50 | 12.00 | 24.00 | 100.0 | 40.00 | 315.00 |
Total Fe (mg L\(^{-1}\)) | 687.0 | 70.90 | 43.20 | 61.40 | 49.20 | 308.0 | 377.00 | 391.0 | 215.0 | 632.0 |
Dissolved Fe (mg L\(^{-1}\)) | 12.30 | 35.50 | 19.90 | 38.10 | 1.53 | 10.80 | 2.34 | 4.10 | 8.20 | 0.51 |
Total Mn (mg L\(^{-1}\)) | 16.30 | 3.65 | 4.08 | 3.84 | 2.44 | 10.60 | 10.90 | 6.12 | 2.53 | 9.14 |
Dissolved Mn (mg L\(^{-1}\)) | 2.43 | 3.14 | 3.17 | 3.21 | 1.41 | 3.13 | 1.52 | 1.61 | 2.05 | 0.69 |
Dissolved Si (mg L\(^{-1}\)) | 13.00 | 10.60 | 11.10 | 13.00 | 9.64 | 12.30 | 9.71 | 10.90 | 10.90 | 4.89 |
Total P (mg L\(^{-1}\)) | 6.39 | 1.45 | 0.68 | 1.45 | 0.84 | 0.18 | 0.38 | 11.80 | 4.00 | 13.60 |
\({{\text{SO}^{2-}_{4}}}\) (mg L\(^{-1}\)) | 330.0 | 1090 | 7.10 | 8.00 | 6.00 | 5.80 | 11.00 | 30.00 | 26.00 | 19.00 |
Sulfide (mg L\(^{-1}\)) | <0.002 | <0.002 | <0.002 | <0.002 | <0.002 | <0.002 | <0.002 | <0.002 | <0.002 | <0.002 |
\({\text{HCO}^{-}_{3}}\) (mg L\(^{-1}\)) | 1040.0 | 477.0 | 845.0 | 960.0 | 637.0 | 975.0 | 922.0 | 1170.0 | 439.0 | 332.0 |
\({\text{Cl}^{-}}\) (mg L\(^{-1}\)) | 138.00 | 26.50 | 587.0 | 459.0 | 179.00 | 181.00 | 187.00 | 224.0 | 43.60 | 29.10 |
\({\text{NO}^{-}_{3}}\) (mg L\(^{-1}\)) | <0.05 | <0.05 | <0.02 | <0.05 | <0.01 | <0.05 | <0.01 | <0.05 | 0.07 | <0.01 |
\({\text{NO}^{-}_{2}}\) (mg L\(^{-1}\)) | <0.02 | <0.02 | <0.02 | <0.02 | <0.005 | <0.02 | <0.005 | <0.02 | 0.06 | <0.01 |
\({\text{Ca}^{2+}}\) (mg L\(^{-1}\)) | 374.00 | 278.0 | 322.0 | 322.0 | 219.00 | 267.00 | 267.00 | 358.0 | 116.0 | 63.70 |
\({\text{Mg}^{2+}}\) (mg L\(^{-1}\)) | 114.00 | 179.0 | 118.0 | 112.0 | 68.30 | 89.00 | 81.60 | 107.0 | 24.00 | 14.80 |
\({\text{Na}^{+}}\) (mg L\(^{-1}\)) | 113.00 | 84.40 | 87.30 | 106.0 | 31.60 | 11.00 | 14.00 | 20.00 | 36.10 | 37.50 |
\({\text{K}^{+}}\) (mg L\(^{-1}\)) | 2.40 | 5.00 | 5.30 | 7.90 | 4.80 | 5.50 | 2.70 | 4.00 | 2.50 | 2.90 |
Total Alkalinity (mg/L) | 857 | 391 | 552 | 800 | 693 | 787 | 756 | 962 | 360 | 272 |
Ionic Balance (%) | 8.59 | 1.58 | 5.39 | 0.15 | 1.37 | 2.14 | 0.26 | 2.84 | 2.35 | 4.36 |