. 2019 Jul 2;7:465. doi: 10.3389/fchem.2019.00465

Table 3.

Kinetic parameters for the adsorption of Hg(II) on PPTA-AM samples.

Adsorbents	q_exp (mmol g⁻¹)	Pseudo-first-order kinetics			Pseudo-second-order kinetics
		k₁ (h⁻¹)	q_e(cal) (mmol g⁻¹)	$R_{1}^{2}$	k₂ (g mmol⁻¹ h⁻¹)	q_e (mmol g⁻¹)	$R_{2}^{2}$
PPTA-AM-90	1.125	0.156	0.858	0.9412	1.579	1.118	0.9972
PPTA-AM-70	1.365	0.197	1.154	0.9695	1.891	1.356	0.9973
PPTA-AM-50	1.315	0.183	0.109	0.9754	1.645	1.321	0.9975
PPTA-AM-30	1.216	0.173	0.965	0.9855	1.441	1.210	0.9973
PPTA-AM-10	1.186	0.160	0.956	0.9653	1.370	1.185	0.9962