Similarly, higher temperatures positively affect Kd, suggesting that increased thermal energy facilitates PFAS diffusion and interaction with adsorption sites. The interaction between pKa and temperature is evident, as their combined influence creates regions of optimal adsorption efficiency. The highest Kd values are observed at temperatures between 30 -35 °C and moderate pKa values (near -1 to 1), indicating a synergistic relationship. Conversely, lower pKa values and lower temperatures result in reduced adsorption efficiency, as reflected in the lower Ka values. This analysis highlights the importance of carefully optimizing both pKa-related conditions and operational temperatures to achieve maximum PFAS removal efficiency in adsorption processes.