Table 2.

Kinetic parameters of adsorption of Cr⁶⁺ ions to the activated TETA-PP

Parameter			PFO			PSO
Activated TETA-PP (g/L)	Cr6+ conc. (mg/L)	qe (exp.)	qe (calc.)	k1 × 103	R2	qe (calc.)	k2 × 103	h	R2
1.0	100	99.45	39.500	13.588	0.974	100.00	0.92	9225	0.997
	150	147.33	39.537	5.527	0.761	131.58	1.68	29070	1.000
	200	188.70	56.403	3.224	0.576	156.25	1.50	36630	0.996
	250	229.76	70.648	5.067	0.976	200.00	0.79	31447	0.998
	300	246.34	65.268	3.685	0.989	212.77	1.18	53476	1.000
	400	326.56	78.886	3.455	0.926	285.71	1.03	84034	1.000
1.5	100	66.67	4.300	8.291	0.767	65.79	14.72	63694	1.000
	150	100.00	27.791	14.739	0.896	101.01	1.45	14793	0.999
	200	132.65	16.665	5.988	0.905	126.58	3.85	61728	1.000
	250	162.85	35.917	9.442	0.771	156.25	1.37	33445	0.999
	300	195.45	40.290	6.448	0.976	181.82	1.39	46083	1.000
	400	250.30	74.405	3.685	0.882	212.77	0.93	42017	0.997
2.0	100	50.00	1.863	5.067	0.429	49.02	50.75	121951	1.000
	150	75.00	8.350	16.582	0.745	75.76	4.92	28249	1.000
	200	100.00	12.151	9.673	0.887	98.04	4.03	38760	0.999
	250	125.00	20.768	5.988	0.768	117.65	3.23	44643	1.000
	300	149.61	32.689	10.594	0.989	147.06	1.32	28653	0.999
	400	196.86	35.678	4.836	0.952	181.82	1.72	56818	0.999
2.5	100	40.00	2.152	8.061	0.870	39.53	26.56	41494	1.000
	150	60.00	2.826	9.903	0.758	59.52	20.02	70922	1.000
	200	80.00	4.250	6.679	0.883	78.74	15.36	95238	1.000
	250	100.00	7.976	9.442	0.943	99.01	6.54	64103	1.000
	300	120.00	14.348	8.982	0.833	117.65	3.39	46948	0.999
	400	159.06	18.243	6.218	0.642	153.85	3.55	84034	1.000
3.0	100	33.33	1.166	7.600	0.620	33.00	43.93	47847	1.000
	150	50.00	2.288	11.976	0.873	49.75	22.83	56497	1.000
	200	66.67	2.958	12.206	0.946	66.67	17.18	76336	1.000
	250	83.33	5.757	13.818	0.967	83.33	8.28	57471	1.000
	300	100.00	5.313	10.594	0.949	99.01	9.72	95238	1.000
	400	133.33	17.811	8.751	0.955	129.87	2.84	47847	1.000