Agricultural & Natural Resources Development Home Page | Land Reclamation Home Page | Effect of Digestion Method, Siderite Content, and Fizz Rating on Neutralization Potential of Overburden Samples
Table 8. NP values (metric tons per 1000
metric tons) of 31 overburden samples when samples were digested
in acid according to standard fizz ratings compared to increasing
the fizz rating and adding a corresponding higher acid amount.
| Sample | Acid Added | Sobek Hand | Acid Added | Sobek Hand |
| Fe | ||||
| 1 | 40 ml 0.1 M | 70 | 40 ml 0.5 M | 192 |
| 2 | 40 ml 0.1 M | 62 | 40 ml 0.5 M | 155 |
| 3 | 40 ml 0.1 M | 63 | 40 ml 0.5 M | 166 |
| 4 | 40 ml 0.1 M | 62 | 40 ml 0.5 M | 192 |
| 5 | 40 ml 0.1 M | 64 | 40 ml 0.5 M | 234 |
| 6 | 40 ml 0.5 M | 367 | 80 ml 0.5 M | 440 |
| Ca | ||||
| 1 | 80 ml 0.5 M | 926 | 60 ml 1.0 M | 919 |
| 2 | 80 ml 0.5 M | 835 | 60 ml 1.0 M | 842 |
| 3 | 80 ml 0.5 M | 711 | 60 ml 1.0 M | 710 |
| S | ||||
| 1 | 20 ml 0.1 M | -23 | 40 ml 0.1 M | -27 |
| 2 | 40 ml 0.1 M | 78 | 40 ml 0.5 M | 86 |
| 3 | 20 ml 0.1 M | 17 | 40 ml 0.1 M | 32 |
| 4 | 20 ml 0.1 M | -1 | 40 ml 0.1 M | -2 |
| 5 | 20 ml 0.1 M | 14 | 40 ml 0.1 M | 15 |
| Si | ||||
| 1 | 20 ml 0.1 M | 5 | 40 ml 0.1 M | 2 |
| 2 | 20 ml 0.1 M | 2 | 40 ml 0.1 M | 1 |
| 3 | 20 ml 0.1 M | 2 | 40 ml 0.1 M | -1 |
| 4 | 20 ml 0.1 M | 15 | 40 ml 0.1 M | 15 |
| 5 | 40 ml 0.5 M | 64 | 80 ml 0.5 M | 74 |
| 6 | 20 ml 0.1 M | -1 | 40 ml 0.1 M | -3 |
| 7 | 20 ml 0.1 M | -5 | 40 ml 0.1 M | -4 |
| 8 | 20 ml 0.1 M | -7 | 40 ml 0.1 M | -9 |
| 9 | 20 ml 0.1 M | -2 | 40 ml 0.1 M | -4 |
| 10 | 20 ml 0.1 M | 18 | 40 ml 0.1 M | 16 |
| 11 | 40 ml 0.1 M | 40 | 40 ml 0.5 M | 28 |
| 12 | 20 ml 0.1 M | 23 | 40 ml 0.1 M | 25 |
| 13 | 40 ml 0.5 M | 113 | 80 ml 0.5 M | 124 |
| 14 | 20 ml 0.1 M | 7 | 40 ml 0.1 M | 8 |
| 15 | 40 ml 0.1 M | 23 | 40 ml 0.5 M | 25 |
| 16 | 20 ml 0.1 M | 17 | 40 ml 0.1 M | 37 |
| 171 | ---- | ---- | ||
1Insufficient sample available.
