Waste-Tire-Derived Activated Carbon as Efficient Adsorbent of P-Nitrophenol from Wastewater

Table 6

The analysis of five kinds of activated carbon diffusion models.

Adsorbent	Intraparticle diffusion
	kd1 (mg(g^−1 h^−1/2))	C1 (mg g^−1)	R^2	χ^2	kd2 (mg(g^−1 h^−1/2))	C2 (mg g^−1)	R^2	χ^2
650-2	49.8725	199.49	0.96	17.65	0.79	63.7425	0.62	0.06
650-0	24.505	98.02	0.904	28.24	7.39	28.0075	0.99	13.30
650-1	10.745	42.98	0.79	74.03	2.9	21.4875	0.47	2.10
750-1	4.2375	16.95	0.95	463.89	3.76	21.93	0.57	3.65
750-2	10.205	40.82	0.92	251.93	1.5	33.7425	0.53	0.39