Temperature (403.035, p = 0.041) has a significant positive effect, implying that higher temperatures might enhance adsorption by increasing diffusion rates or favoring specific adsorption mechanisms. Log Kow (18.133, p = 0.007) also has a significant impact, confirming that hydrophobic interactions play a role in PFAS adsorption. However, molecular weight (56.610, p = 0.891) is not statistically significant, suggesting that molecular size alone does not strongly influence Kd within the studied range. Besides molecular weight, the other non-significant terms are given in Table with detailed explanations in supporting information.