Equilibrium Isotherms, Kinetics, and Thermodynamic Mechanisms of a Novel Polyacrylamide-Strychnos potatorum Seed-Derived Activated Carbon Composite for Aqueous Hardness Removal

Table 1

Freundlich isotherm parameters of PA-ACSPC.

Parameter	Hardness	Mg	Ca
K F ((mg/kg) (L/mg)^1/n))	387.1	209.4	249.3
n	1.031	1.097	0.794
R ^2	0.999	0.998	0.995