Earth Science & Energy
Acid Mine Drainage (AMD) Maximum Neutralization Potential Sizer
Calculate acid mine drainage (amd) maximum neutralization potential using the stated engineering or scientific relationship and adjustable field inputs.
Preparing your result…
What this calculator does
Calculates Acid Mine Drainage (AMD) Maximum Neutralization Potential Sizer using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
NNP = NP − 31.25 × sulfur%; NPR = NP/AP
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Acid potential AP=31.25×sulfur wt% in kg CaCO3 equivalent/t; NNP=NP−AP; NPR=NP/AP when AP>0. NP and AP must use the same mass-equivalent basis.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • Static acid-base accounting is a screening test, not an acid-drainage rate prediction. Sulfur speciation, NP test method and material heterogeneity matter. NPR is undefined at zero AP; do not return infinity as a safe classification.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Neutralization potential (kg CaCO₃/t) | Sulfur (%) | Net neutralization potential |
|---|---|---|---|
| Worked example | 60 | 1.5 | 13.125 kg CaCO₃/t |
| Half the amounts | 30 | 0.75 | 6.5625 kg CaCO₃/t |
| Double the amounts | 120 | 3 | 26.25 kg CaCO₃/t |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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