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. 2020 Oct 29;5(44):28673–28683. doi: 10.1021/acsomega.0c03811

Table 3. Adsorption Kinetics Parameters for Tannin Adsorption onto OPT-Derived AC Obtained from the Fitting and Reliability Indicators.

			PFO Lagergren⁶³				PSO Ho and McKay⁵⁵
	pH	q_texp (mg g^–1)	k₁ (min^–1)	q_tcal (mg g^–1)	Adj R²	Δq (%)	k₂ [g (mg min)⁻¹]	q_tcal (mg g^–1)	Adj R²	Δq (%)
linear equation	2	24.71	0.0108	0.53	0.5268	7.522	0.26	24.98	0.9990	0.083
	4	23.73	0.0085	1.54	0.5912	7.195	0.07	24.01	0.9990	0.091
	6	23.22	0.0055	0.98	0.3064	7.366	0.06	23.55	0.9990	0.108
	8	22.41	0.0079	5.32	0.7409	5.866	0.02	22.43	0.9880	0.007
nonlinear equation	2	24.71	2.70	24.78	0.9997	0.023	0.61	24.95	0.9995	0.075
	4	23.73	2.75	23.51	0.9946	0.072	0.65	23.56	0.9987	0.054
	6	22.63	2.66	23.12	0.9935	0.033	0.44	23.28	0.9985	0.020
	8	22.41	0.85	19.98	0.8592	0.834	0.07	20.97	0.9487	0.495