The efficiency of mixed acids and sodium peroxide in the decomposition of raw kaolin

Abstract

The study compared decomposition efficiency of mixed acids and sodium peroxide on raw kaolin sample. The sample was decomposed using the two methods and its chemical composition determined. Standard concentrations of elemental chemical composition obtained from the decomposition were prepared and used to spike the raw kaolin sample. The spiked kaolin sample was decomposed using the two methods. Percentage recovery of the elemental oxides show that mixed acids have higher efficiency for MgO, Na₂O and K₂O while Na₂O₂ favour FeO, CaO, Al₂O₃, TiO₂ and SiO₂.

Keywords: Kaolin, Spiking, Decomposition, Efficiency.