Contribution of Ion-Exchange and Non-Ion-Exchange Reactions to Sorption of Ammonium Ions by Natural and Activated Aluminosilicate Sorbent

Table 6

Quantity of exchangeable cations desorbed from alkali-treated M₄₅C₂₀ sorbent by sorption of NH₄⁺-ions.

𝐶equilb. (NH4^+),; mmol/dm^3	Quantity of desorbed cations, mmol/g				∑ Na^+, K^+, Ca^2+, Mg^2+, mmol/g	𝐶NH4^+ in sorbent phase, mmol/g
	Na^+	K^+	Ca^2+	Mg^2+
1.915	0.397	0.018	0.351	0.052	0.817	0.585
3.916	0.554	0.024	0.521	0.096	1.195	1.084
8.545	0.773	0.029	0.721	0.166	1.690	1.455
22.579	0.923	0.034	0.994	0.209	2.160	2.421
47.213	1.202	0.041	1.061	0.223	2.524	2.787
95.831	1.260	0.042	1.204	0.250	2.782	4.169
195.580	1.291	0.042	1.202	0.265	2.797	4.420