Effectiveness of Lime Particle Size in the Neutralisation of Sulfidic Acid Sulfate Soil Materials

摘要

The effectiveness of the acid neutralising capacity of a range of lime particle sizes in alkaline and acidic sulfidic acid sulfate soils has been determined by an incubation method. The criterion for acceptable acid neutralising capacity was the ability of the neutralising material (e.g. lime) to maintain the soil materials' pH at greater than or equal to 6.5. In incubated alkaline sulfidic soil materials this criterion was satisfied by lime particle sizes below 1 mm; while in incubated acidic sulfidic soil materials, a particle size of below 0.5 mm was required. This experiment has demonstrated, for the first time, the lime particle sizes required for the optimum treatment and remediation of sulfidic acid sulfate soil materials.