Zeolite Application in Wastewater Treatment

Table 3

Heavy metals removed by different zeolites, along with experimental conditions and adsorption and kinetic models.

Metal ion	Zeolite	(°C)	Contact time (h)	Metal concentration (mg·L^-1)	S/L ratio (g·L^-1)	pH	Metal sorption (mg·g^-1)	Isotherm model	Kinetic model	References
Pb^2+	A	25	5	50-800	1	4	100.0	Langmuir	Pseudo-second-order	[148]
	A	25	0.5	100-400	—	7.5	182.0	Langmuir	—	[83]
	X	25	0.5	100-400	—	7.5	213.0			[83]
	Clinoptilolite	70	24	200-2000	10	4.5	78.7	—	—	[75]
	Na-clinoptilolite	70	24	200-2000	10	4.5	91.2	—	—	[75]
	Faujasite	25	1	70-400	2.5	4.5	25.9	Langmuir	Pseudo-second-order	[159]
	Y	26	1	100	1	6	454.5	Langmuir	Pseudo-second-order	[84]
	Clinoptilolite	20	6	103.8	100	3	51.6	Langmuir	—	[81]
	HDTMA-Y	25	24	1000.0	4	5	76.0	Langmuir	Pseudo-second-order	[160]
Cd^2+	A	25	5	50-800	1	4	56.5	Langmuir	Pseudo-second-order	[148]
	NaP1	22	6	10-200	2.5	6	50.8	Langmuir	—	[74]
	A	25	0.5	100-400	—	7.5	71.0	Langmuir	—	[83]
	X	25	0.5	100-400	—	7.5	92.0			[83]
	Clinoptilolite	22	6	10-200	10	6	4.6	Langmuir	—	[74]
	Clinoptilolite	70	24	110-1100	10	4.5	13.5	—	—	[75]
	Scolecite	55	24	10-5000	16	6	100.0	Freundlich	Pseudo-second-order	[73]
	Na-clinoptilolite	70	24	110-1100	10	4.5	23.6	—	—	[75]
	Clinoptilolite	20	6	81.5	100	3	7.3	Langmuir	—	[81]
	A	30	—	50-1000	3	8	736.4	Langmuir	Pseudo-second-order	[66]
	X	30	—	50-1000	3	8	684.4
	X	30	2.5	10-160	1	7	38.3	Langmuir	Pseudo-second-order	[115]
Cr^3+	NaP1	22	6	10-200	2.5	4	43.6	Langmuir	—	[74]
	A+X	25	24	500	5	—	71.1	—	—	[161]
	A	25	4	50-300	1	4	41.6	Langmuir	Pseudo-second-order	[82]
	Clinoptilolite	22	6	10-200	10	4	4.1	Langmuir	—	[74]
	Mordenite	25	24	500	5	—	3.6	—	—	[161]
	Scolecite	55	24	10-5000	16	6	106.4	Freundlich	Pseudo-second-order	[73]
	X	30	2	10-160	1	7	62.1	Langmuir	Pseudo-second-order	[115]
Ni^2+	A	25	5	50-800	1	4	41.2	Langmuir	Pseudo-second-order	[148]
	A	25	4	50-300	1	4	9.0	Langmuir	Pseudo-second-order	[82]
	NaP1	22	6	10-200	2.5	6	20.1	Langmuir	—	[74]
	A	25	1	100-400	—	7.5	24.7	Langmuir	—	[83]
	X	25	1	100-400	—	7.5	24.9			[83]
	Clinoptilolite	22	6	10-200	10	6	2.0	Langmuir	—	[74]
	Scolecite	55	24	10-5000	16	6	122.0	Freundlich	Pseudo-second-order	[73]
	13X	40	3	0-100	5	6	6.2	Langmuir	Pseudo-second-order	[114]
	HDTMA-Y	25	24	1000	4	5	20.0	—	Pseudo-second-order	[160]
Zn^2+	A	25	5	50-800	1	4	45.5	Langmuir	Pseudo-second-order	[148]
	A	25	4	50-300	1	4	30.8	Langmuir	Pseudo-second-order	[82]
	NaP1	22	6	10-200	2.5	6	32.6	Langmuir	—	[74]
	A	25	0.5	100-400	—	7.5	28.6	Langmuir	—	[83]
	X	25	0.5	100-400	—	7.5	41.0			[83]
	Clinoptilolite	22	6	10-200	10	6	3.5	Langmuir	—	[74]
	Clinoptilolite	20	6	98.6	100	3	5.1	Langmuir	—	[81]
	HDTMA-Y	25	24	1000	4	5	26.0	—	Pseudo-second-order	[160]
	X	30	2.5	10-160	1	7	45.1	Langmuir	Pseudo-second-order	[115]
Cu^2+	A	25	5	50-800	1	4	35.6	Langmuir	Pseudo-second-order	[148]
	A	25	4	50-300	1	4	50.5	Langmuir	Pseudo-second-order	[82]
	NaP1	22	6	10-200	2.5	5	50.5	Langmuir	—	[74]
	A	25	0.5	100-400	—	7.5	41.6	Langmuir	—	[83]
	X	25	0.5	100-400	—	7.5	48.8			[83]
	Clinoptilolite	22	6	10-200	10	5	5.9	Langmuir	—	[74]
	Clinoptilolite	20	6	97.9	100	3	4.8	Langmuir	—	[81]
	HDTMA-Y	25	24	1000	4	5	36.0	—	Pseudo-second-order	[160]
	X	30	2	10-160	1	7	64.6	Langmuir	Pseudo-second-order	[115]
Mn^2+	Clinoptilolite+mordenite	25	2	5-600	2.5	6	7.1	Langmuir	Pseudo-second-order	[162]
	NaOH-activated clinoptilolite+mordenite	25	2	5-600	2.5	6	20.9	Langmuir	Pseudo-second-order	[162]
	NH4Cl-activated clinoptilolite+mordenite	25	2	5-600	2.5	6	18.5	Langmuir	Pseudo-second-order	[162]
	NaCl-activated clinoptilolite+mordenite	25	2	5-600	2.5	6	21.3	Langmuir	Pseudo-second-order	[162]
	Na2CO3-activated clinoptilolite+mordenite	25	2	5-600	2.5	6	19.7	Langmuir	Pseudo-second-order	[162]
	Manganese oxide-coated clinoptilolite+mordenite	25	2 h	25-600	2.5	6	30.8	Langmuir/Freundlich	Pseudo-second-order	[163]
	Scolecite	55	24	10-5000	16	6	109.9	Freundlich	Pseudo-second-order	[73]
As^5+	Iron-coated clinoptilolite	25	—	2	100	4	0.7	Langmuir	—	[78]
Cr^6+	Clinoptilolite	20	24	30-350	25	5	0.9	Langmuir	Pseudo-second-order	[77]
	HDPB-clinoptilolite	20	24	30-350	25	5	2.8	Freundlich	Pseudo-second-order	[77]
	Chabazite	20	24	30-350	25	5	1.5	Langmuir	Pseudo-second-order	[77]
	HDPB-chabazite	20	24	30-350	25	5	14.3	Freundlich	Pseudo-second-order	[77]
	13X	40	3	0-100	5	6	3.9	Langmuir	Pseudo-second-order	[114]