From Table 1 and Figure 1, dry WTS proved to have high Al and Fe content and was therefore used for the leaching process. 98% analytical grade sulphuric acid (H₂SO₄) supplied by Rochelle Chemicals was diluted with distilled water to produce the desired normalities (1.0, 2.0, 2.5 and 3.0 N). Solid loading was varied from 3 g WTS/100 mL of leaching agent, 5 g WTS/100 mL of leaching agent to 10 g WTS/100 mL of leaching agent.