Prussian Blue Analogues of A₂[Fe(CN)₆] (A: Cu²⁺, Co²⁺, and Ni²⁺) and Their Composition-Dependent Sorption Performances towards Cs⁺, Sr²⁺, and Co²⁺

Table 4

Adsorption isothermal parameters of Cs⁺, Sr²⁺_, andCo²⁺ by A₂[Fe(CN)₆] extract from Langmuir and Freundlich models.

		Langmuir			Freundlich
Ion	Adsorbent material	(mg/g)	(L/mg)		(mg/g)
Cs^+	Cu2[Fe(CN)6]	155.60	0.996	0.927	62.69	6.797	0.907
	Co2[Fe(CN)6]	154.46	0.010	0.954	9.44	2.269	0.890
	Ni2[Fe(CN)6]	120.31	0.272	0.973	53.49	6.570	0.708
Sr^2+	Cu2[Fe(CN)6]	59.95	0.068	0.980	13.65	3.804	0.871
	Co2[Fe(CN)6]	32.73	0.008	0.961	1.79	2.233	0.953
	Ni2[Fe(CN)6]	29.17	0.009	0.989	1.58	2.204	0.965
Co^2+	Cu2[Fe(CN)6]	62.08	0.078	0.961	18.03	4.585	0.827
	Ni2[Fe(CN)6]	32.34	0.028	0.935	5.81	3.523	0.914