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Table II Concentrations of trace elements in extractions, residual, and total sediment. (Concentrations are expressed in ng/g of sediment, dry weight, except for Fe, which is in mg/g of sediment, dry weight)

From: Potential contaminants at a dredged spoil placement site, Charles City County, Virginia, as revealed by sequential extraction

Metal Sample No. Fraction 1 Fraction 2 Fraction 3 Fraction 4 Residual phase Total sediment Recovery (%)
Ag 1 0.071 0.108 24.282 13.151 295.500 272.972 122.03
  2 a 0.258 26.423 194.766 491.561 693.362 102.83
  4 a a 258.351 1 640.871 ndb 2725.560 nd
  5 a 0.108 74.332 98.191 348.656 528.108 98.71
  6 a a 5.307 1.010 243.375 240.755 103.72
  7 0.029 a 10.231 2.750 296.623 280.744 110.29
  8 0.042 0.046 16.736 1.523 255.623 250.221 109.49
  9 0.062 0.078 9.059 5.319 287.225 279.386 108.00
Cd 1 6.472 48.354 45.847 5.486 101.534 238.342 87.14
  2 6.275 117.290 85.701 6.849 161.041 303.086 124.44
  4 43.571 349.965 311.591 106.501 nd 866.235 nd
  5 39.239 699.384 2223.193 179.158 921.440 5 066.074 80.19
  6 0.400 1.678 10.813 2.650 91.395 100.167 106.76
  7 3.998 8.867 64.063 7.605 104.854 174.981 108.23
  8 0.669 2.506 16.212 2.968 102.618 121.542 102.82
  9 3.568 8.871 44.786 4.804 98.115 173.394 92.36
Sb 1 5.028 13.786 5.503 4.746 515.786 474.605 114.80
  2 6.710 28.956 7.883 4.863 483.815 519.791 102.39
  4 8.204 29.122 12.983 7.455 nd 720.023 nd
  5 6.312 18.481 7.257 4.735 649.543 632.068 108.58
  6 1.372 1.554 3.924 2.673 544.855 478.999 115.74
  7 1.581 1.727 3.974 3.330 532.943 485.434 111.97
  8 0.517 1.481 5.382 3.878 649.343 644.756 102.46
  9 0.845 1.681 7.016 4.484 530.655 454.094 119.95
Tl 1 3.188 3.457 15.325 11.274 528.135 621.076 90.39
  2 3.522 5.351 22.836 17.036 349.515 443.725 89.75
  4 5.204 7.084 37.733 25.468 nd 569.952 nd
  5 2.678 4.336 22.136 15.267 406.490 468.313 96.28
  6 1.246 1.148 22.210 13.809 350.623 398.097 97.72
  7 1.505 1.265 10.337 9.181 507.974 427.184 124.13
  8 0.995 0.802 19.498 8.158 396.546 444.724 95.79
  9 2.806 2.093 19.205 9.198 408.756 400.062 110.50
Pb 1 11.260 1 999.360 9271.597 2 300.046 6 202.777 25 326.599 78.12
  2 9.060 5 340.496 17 736.960 4 033.203 4 827.587 33 594.686 95.10
  4 14.420 5 434.827 32 087.274 11519.033 nd 52435.338 nd
  5 129.663 31 102.512 91 037.459 14546.412 15 745.862 189 134.779 80.66
  6 4.127 765.766 5 330.865 869.676 4 659.941 15 741.670 73.88
  7 4.759 615.366 7 478.567 1 773.999 9091.660 18 007.325 105.31
  8 4.984 1032.451 6 844.099 836.929 5 032.686 18 227.665 75.44
  9 4.741 792.434 5 562.834 782.768 6638.363 16785.683 82.10
Cr 1 9.250 676.057 4 144.599 3533.393 57449.183 61441.193 107.11
  2 6.695 904.332 5931.275 4631.480 48271.178 53 827.594 110.99
  4 8.988 1 302.097 11276.499 9805.180 nd 70 072.496 nd
  5 9.102 855.133 5 642.895 4 230.704 46 970.601 51 356.518 112.37
  6 12.017 25.631 3 194.288 1929.951 40 754.522 38091.117 120.54
  7 7.660 42.031 6 567.750 3 158.592 50 648.430 59 552.998 101.46
  8 16.475 27.106 4 848.704 1 396.597 43 903.636 51 437.231 97.58
  9 43.920 15.808 1 888.904 1 545.616 39 454.099 37 642.710 114.09
Fe 1 0.001 0.495 9.124 0.484 27.617 39.577 95.31
  2 3.3E–5 0.505 10.108 0.737 23.525 31.584 110.42
  4 4.3E–5 0.326 11.235 1.817 nd 38.392 nd
  5 4.3E–5 0.606 10.228 0.718 23.674 31.623 111.39
  6 a 0.001 6.469 0.484 29.853 34.569 106.47
  7 6.7E–5 0.001 4.964 0.334 17.561 22.729 100.58
  8 2.6E–4 0.001 8.664 0.356 25.631 36.269 95.54
  9 1.1E–5 0.002 6.770 0.464 19.486 26.629 100.35
Ni 1 32.781 1 169.294 4853.280 2 054.761 25738.313 33 034.089 102.47
  2 27.933 1 857.217 6498.011 2316.266 21 107.574 28958.351 109.84
  4 46.143 1 794.210 9 930.939 3 878.025 nd 35 266.273 nd
  5 40.443 1 628.284 6 406.030 2813.551 19433.457 30003.451 101.06
  6 44.151 35.639 1 456.371 1 601.098 19913.320 17795.148 129.53
  7 186.767 503.479 8233.408 1 412.784 23 452.670 32 684.564 103.38
  8 58.319 44.355 1 856.858 810.413 22 698.592 23 392.666 108.87
  9 26.250 114.256 2 307.372 1 272.209 17232.591 16453.127 127.35
Cu 1 53.019 1 188.204 3 758.365 5944.153 17415.774 29436.611 96.34
  2 49.178 1 773.634 4434.530 8 870.600 15 064.632 27 370.758 110.31
  4 109.659 3 729.499 11020.389 22 689.878 nd 49 870.074 nd
  5 34.285 1 427.713 4967.171 7551.255 15315.070 27 577.567 106.23
  6 15.007 83.844 2938.981 1 822.681 20 064.779 18926.953 131.69
  7 25.881 932.864 16 554.675 3 301.967 15848.147 33243.183 110.29
  8 13.493 75.531 3 035.225 990.290 18 085.262 21 602.361 102.77
  9 19.182 175.868 4095.619 1431.143 11754.839 14271.972 122.45
Zn 1 102.805 2 748.999 16884.517 5534.190 55 179.058 89011.596 90.38
  2 45.126 15 607.008 42 838.627 7910.451 45 422.619 102402.318 109.20
  4 300.531 46 232.551 143051.392 32 983.708 nd 254 094.253 nd
  5 86.802 18314.012 61 859.848 7 562.907 39 928.454 125 067.801 102.15
  6 6.174 103.943 5 986.605 5 559.082 57 102.705 60814.605 113.06
  7 37.223 1 530.869 31940.336 9 076.450 55 298.628 89 163.105 109.78
  8 15.069 133.418 7 826.604 3 432.023 55 492.337 70 172.591 95.34
  9 7.089 319.206 13 012.595 6488.597 51448.571 59903.783 118.98
As 1 28.328 151.934 1 232.778 34.054 4719.936 5499.051 112.15
  2 29.745 201.669 1544.199 93.879 4500.311 4431.341 143.74
  4 19.041 219.711 2713.633 331.686 nd 7 145.773 nd
  5 47.221 267.051 1 943.043 148.682 5 445.426 5 496.017 142.86
  6 a 12.706 108.269 a 7 268.973 6212.311 119.08
  7 34.574 68.575 2 191.545 169.113 10 166.936 10736.104 117.65
  8 10.537 20.510 154.292 a 7 677.608 8 578.925 91.76
  9 a 10.850 311.100 a 5 635.792 4 953.477 120.24
  1. aBelow detection limit.
  2. bnd = not determined.