Table 5 Models of diffusion parametric calculation.

Initial volume	Temp	Film diffusion model		Weber–Morris model		Dumwald–Wagner
(ppm)	(K)	R^\| (min⁻¹)	R²	k_ist (mg/g s^0.5)	R²	K (min⁻¹)	R²
50	303	0.0212	0.69	0.40	0.78	0.002	0.69
	313	0.0131	0.57	0.21	0.66	0.035	0.77
	323	0.0255	0.86	0.52	0.86	0.008	0.43
100	303	0.0448	0.92	2.29	0.79	0.044	0.92
	313	0.0519	0.91	2.59	0.79	0.051	0.91
	323	0.0468	0.92	2.54	0.82	0.046	0.92
150	303	0.0154	0.88	0.45	0.89	0.015	0.88
	313	0.0099	0.69	0.27	0.67	0.808	0.69
	323	0.0131	0.57	0.35	0.46	0.013	0.57

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