*4.2. Post-Exposure Analysis*

After reaching the pre-designated period of exposure, the slurry samples were centrifuged and filtered using a 0.2 μm cellulose acetate filter to separate solids from the soak solutions. The solids were then oven-dried at 35 ± 5 ◦C for three days, pulverized using mortar and pestle and stored in sealed glass vials with a plastic cap. Afterwards, the powdered solids were subjected to thermogravimetric analysis. The filtered solutions were kept sealed in 15 mL plastic centrifuge tubes and stored in the laboratory refrigerator at ~4–5 ◦C, until they were removed for ICP and IC analyses.
