Research Article
Speciation of Chromium in Soil and Sludge in the Surrounding Tannery Region, Ranipet, Tamil Nadu
Table 2
Concentration (Ave ± Stdev, (in μg/g)) of different forms of Cr in soil samples with sequential extraction.
| S. No | Water soluble | Exchangeable | Carbonate & sulfide | Reducible fraction | Oxidisable fraction | Residual fraction | Total Cr |
| 1a | 51.85 ± 0.34 | 29.62 ± 0.20 | 17.28 ± 0.30 | 98.76 ± 0.92 | 55.55 ± 0.32 | 64.81 ± 0.67 | 317.9 ± 2.1 | 1b | 83.29 ± 0.61 | 36.74 ± 0.60 | 14.69 ± 0.40 | 102.8 ± 1.20 | 52.05 ± 0.43 | 42.87 ± 0.41 | 332.5 ± 2.8 | 1c | 44.48 ± 0.21 | 23.47 ± 0.05 | 13.59 ± 0.06 | 98.86 ± 0.58 | 49.43 ± 0.17 | 24.70 ± 0.04 | 254.6 ± 1.9 | 2a | 80.29 ± 0.42 | 29.29 ± 0.15 | 13.38 ± 0.22 | 105.8 ± 0.73 | 42.57 ± 0.21 | 36.49 ± 0.35 | 307.8 ± 2.7 | 2b | 49.11 ± 0.33 | 36.83 ± 0.30 | 19.64 ± 0.33 | 115.4 ± 0.72 | 30.69 ± 0.41 | 39.90 ± 0.06 | 291.6 ± 0.9 | 2c | 81.04 ± 0.61 | 12.27 ± 0.60 | 18.41 ± 0.16 | 103.1 ± 0.80 | 36.83 ± 0.33 | 61.39 ± 0.61 | 313.1 ± 2.1 | 3a | 57.09 ± 0.23 | 35.98 ± 0.45 | 17.36 ± 0.23 | 107.9 ± 0.90 | 34.11 ± 0.31 | 68.23 ± 0.63 | 327.7 ± 1.7 | 3b | 34.58 ± 0.21 | 44.33 ± 0.21 | 16.00 ± 0.31 | 108.3 ± 0.32 | 36.94 ± 0.42 | 36.94 ± 0.32 | 277.1 ± 1.1 | 3c | 22.55 ± 0.09 | 45.11 ± 0.38 | 42.60 ± 0.62 | 112.7 ± 0.56 | 43.85 ± 0.26 | 25.06 ± 0.12 | 291.9 ± 0.7 | 4a | 38.58 ± 0.08 | 13.78 ± 0.30 | 16.50 ± 0.24 | 26.18 ± 0.32 | 44.78 ± 0.51 | 31.00 ± 0.05 | 170.9 ± 0.8 | 4b | 47.52 ± 0.11 | 32.51 ± 0.80 | 27.59 ± 0.14 | 12.50 ± 0.04 | 28.13 ± 0.44 | 56.29 ± 0.22 | 204.5 ± 1.3 | 4c | 33.46 ± 0.05 | 11.15 ± 0.10 | 26.77 ± 0.72 | 94.82 ± 0.71 | 25.93 ± 0.07 | 25.10 ± 0.80 | 217.3 ± 1.4 | 5a | 44.24 ± 0.53 | 34.41 ± 0.70 | 57.76 ± 0.43 | 110.7 ± 0.48 | 30.72 ± 0.62 | 18.43 ± 0.22 | 296.2 ± 1.5 | 5b | 32.08 ± 0.33 | 34.55 ± 0.32 | 25.91 ± 0.41 | 103.7 ± 0.83 | 49.35 ± 0.70 | 2.77 ± 0.01 | 240.3 ± 2.0 | 5c | 44.05 ± 0.42 | 31.81 ± 0.27 | 14.68 ± 0.32 | 99.11 ± 0.37 | 30.59 ± 0.17 | 48.94 ± 0.42 | 269.2 ± 0.7 | 6a | 37.34 ± 0.06 | 9.03 ± 0.20 | 25.20 ± 0.13 | 17.01 ± 0.03 | 42.00 ± 0.51 | 35.00 ± 0.04 | 218.9 ± 1.4 | 6b | 76.20 ± 0.23 | 29.49 ± 0.61 | 40.56 ± 0.73 | 307.2 ± 1.31 | 67.60 ± 0.48 | 30.70 ± 0.18 | 551.9 ± 2.3 | 6c | 116.7 ± 0.92 | 26.20 ± 0.39 | 17.86 ± 0.44 | 78.60 ± 0.43 | 29.71 ± 0.32 | 29.77 ± 0.27 | 298.9 ± 1.7 | 7a | 36.63 ± 0.07 | 29.37 ± 0.26 | 40.30 ± 0.72 | 102.5 ± 0.72 | 30.53 ± 0.05 | 39.69 ± 0.62 | 279.1 ± 1.5 | 7b | 32.40 ± 0.05 | 44.86 ± 0.32 | 29.91 ± 0.51 | 112.1 ± 0.61 | 37.38 ± 0.44 | 24.90 ± 0.20 | 281.6 ± 1.2 | 7c | 50.69 ± 0.61 | 34.61 ± 0.27 | 17.30 ± 0.04 | 92.72 ± 0.47 | 28.43 ± 0.37 | 40.18 ± 0.51 | 264.0 ± 1.7 | 8a | 62.98 ± 0.45 | 53.29 ± 0.42 | 25.43 ± 0.64 | 17.25 ± 0.04 | 33.30 ± 0.41 | 27.25 ± 0.31 | 272.3 ± 1.1 | 8b | 36.37 ± 0.34 | 12.12 ± 0.33 | 13.33 ± 0.06 | 12.12 ± 0.03 | 48.49 ± 0.60 | 16.62 ± 0.05 | 183.1 ± 0.6 | 8c | 29.62 ± 0.21 | 24.69 ± 0.50 | 59.25 ± 0.76 | 29.62 ± 0.12 | 37.03 ± 0.42 | 21.60 ± 0.03 | 201.8 ± 0.9 | 9a | 27.03 ± 0.13 | 49.23 ± 0.52 | 35.15 ± 0.04 | 81.24 ± 0.64 | 55.39 ± 0.42 | 52.31 ± 0.71 | 303.4 ± 1.0 | 9b | 42.22 ± 0.37 | 37.25 ± 0.24 | 24.83 ± 0.11 | 99.35 ± 0.83 | 31.04 ± 0.53 | 27.94 ± 0.50 | 262.7 ± 0.5 | 9c | 287.2 ± 2.10 | 12.04 ± 0.10 | 66.26 ± 0.63 | 93.97 ± 0.53 | 33.13 ± 0.04 | 21.08 ± 0.07 | 515.7 ± 1.7 | 10a | 46.29 ± 0.70 | 37.03 ± 0.70 | 27.77 ± 0.32 | 115.7 ± 0.74 | 57.89 ± 0.08 | 57.87 ± 0.53 | 342.6 ± 1.4 | 10b | 33.80 ± 0.40 | 31.38 ± 0.30 | 26.55 ± 0.06 | 96.75 ± 0.44 | 36.21 ± 0.33 | 51.30 ± 0.42 | 275.8 ± 1.3 | 10c | 27.39 ± 0.53 | 48.99 ± 0.44 | 34.29 ± 0.16 | 17.54 ± 0.34 | 42.87 ± 0.51 | 51.31 ± 0.87 | 180.0 ± 0.7 |
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