Variation of the Liquid to Solid Ratio in the Extraction
Test. The leachate concentration of a species (e.g., Na, K)
is inversely proportional to the liquid to solid ratio if it forms
no slightly soluble compounds. However, if the concentration
of a given species is limited by the solubility of a slightly
soluble compound, the final concentration is independent
of the L/S ratio and simply equals the maximum solubility.
Variation of the Amount of Lime in the Solidification
Recipe. Waste material was solidified using only lime, and
the amount of lime was varied. The amount of lime used in
the recipe determines the concentration of Ca2+ ions in
solution and thus the value of the saturation index of the
compound CaHAsO3.