In many cases minimising disturbance is not possible especially in relation to construction projects. Reclaiming land and water cover are based on removing the possibility of oxygen coming into contact with the sulphate within the soil, but in many circumstances is not possible. Therefore neutralisation is the only management technique available in many situations where acid sulphate soil is present.
The way in which acid sulphate soil is neutralised is relatively simple in that a highly basic material, such as lime, is mixed with the acid sulphate soil.
The amount of lime required to be mixed with the acid sulphate soil is determined by analysing a sample of soil to calculate actual acidity and relating the amount of lime required to be added to effectively neutralise the soil. In many cases of acid sulphate soil treatment, agricultural lime is used to neutralise the soil.
However, there are other reagents available, which are effective such as hydrated lime, mixtures of hydrated lime and agricultural lime, and also lime slurries, which are added as a liquid.
Discharge of shallow acid groundwater from acid sulphate soil