Zeolite Application in Wastewater Treatment

Table 5

Zeolites used in ammonium removal, along with experimental conditions and adsorption and kinetic models.

Zeolite	(°C)	Contact time (h)	Concentration (mg·L^-1)	S/L ratio (g·L^-1)	pH	NH4^+ sorption capacity (mg·L^-1)	Isotherm model	Kinetic model	References
Clinoptilolite	25	12	1-20	0-0.6	—	4.3	Langmuir	Pseudo-first-order	[89]
NaNO3-modified clinoptilolite	25	12	1-20	0-0.6	—	8.1	Freundlich	Pseudo-first-order
Zeolite P+analcime	25	1	5-500	5	6	17.5	Koble-Corrigan	Pseudo-second-order	[90]
Zeolite X	25	8	100-400	2	7	89.1	Freundlich	Pseudo-second-order	[86]
Zeolite A						59.3
Chabazite	25	5	130-2080	75	7	39.3	Langmuir	Pseudo-second-order	[91]
Zeolite NaY	25	2	40-615	6.3	—	26.5	Langmuir	Pseudo-second-order	[4]
Modified Na-clinoptilolite	25	24	0-83	—	7.2	14.5	Langmuir	—	[167]
Clinoptilolite+mordenite	25	8	5-120	10	6	6.3	Freundlich	Pseudo-second-order	[88]
Zeolite NaA	25	0-2	—	—	7.9	10.5	Freundlich	Pseudo-second-order	[87]
Magnetic zeolite NaA						10.4