Table 4.
The neutralizing value of various liming materials expressed as a weight percentage of pure lime (CaCO3) adapted from Bolan et al. (2003)
| Liming material | Chemical formula | Neutralising value |
|---|---|---|
| Burnt lime | CaO | 179.0 |
| Slaked lime | Ca(OH)2 | 136.0 |
| Dolomitic lime | CaMg(CO3)2 | 109.0 |
| Lime | CaCO 3 | 100.0 |
| Basic slag | CaSiO3 | 86.0 |
| Phosphogypsum | CaSO4.2H2O | 0.3 |
| Mined gypsum | CaSO4.2H2O | 12.4 |
| Flue gas desulphurised gypsum | CaSO4.2H2O | 0.1 |
| Coal fly ash | Variable |
Italicised text shows lime as the reference against which other acid neutralising materials are compared.