Table 3.

Kinetic model equations for Ag⁺ and Hg²⁺ adsorption on PTT nanoparticles.

Mathematical Model	Equation	R2	Standard Deviation	k1(h−1) k2(g·mg−1·h−1) h0(mg·g−1·h−1)	Qe Found by
					Experiment	Equation
Ag+ adsorption
Pseudo-1st-order	−ln(1 − Qt/Qe) = 9.9918t + 2.1009	0.3191	3.3821	k1 = 9.9918 k2 = 14.4009 h0 = 5.3642 × 103	19.30	–
Pseudo-2nd-order	t/Qt = 0.05168t + 2.0793 × 10−4	0.99998	1.8462 × 10−4		19.30	19.35
Hg2+ adsorption
Pseudo-1st-order	−ln(1 − Qt/Qe) = 5.9904t + 1.3080	0.5576	1.2366	k1 = 5.9904 k2 = 5.4834 h0 = 1.5001 × 103	16.54	–
Pseudo-2nd-order	t/Qt = 0.06002t + 6.6663 × 10−4	0.9992	3.6159 × 10−4		16.54	16.66