Removal of Fluoride from Aqueous Solutions Using Chitosan Cryogels

Table 2

Summary of isotherms.

(K)	Cryogel	Freundlich					Langmuir				Langmuir-Freundlich
		[(mgg^−1)(Lmg^−1)^1/n]					(mgg^−1)	(Lmg^−1)			(mg^1−n L^3ng^−1)
303	QE	11.19	2.16	0.46	0.95	90.74	280.87	6 × 10^−3	0.99	17.23	1.13	4 × 10^−3	1.10	0.99	27.28
	QEFe	22.48	2.60	0.38	0.95	125.00	295.38	11 × 10^−3	0.99	10.33	4.13	14 × 10^−3	0.95	0.99	8.59
313	QE	7.56	1.86	0.54	0.93	194.89	330.35	4 × 10^−3	0.97	71.62	0.05	2 × 10^−4	1.76	0.99	41.57
	QEFe	23.86	2.66	0.37	0.94	133.97	291.19	13 × 10^−3	0.99	20.04	4.99	16 × 10^−3	0.92	0.99	17.41
323	QE	12.94	2.04	0.49	0.93	237.47	381.13	6 × 10^−3	0.99	66.71	0.35	1 × 10^−3	1.45	0.99	12.94
	QEFe	28.33	2.46	0.41	0.92	270.88	436.64	11 × 10^−3	0.98	54.53	2.11	5 × 10^−3	1.21	0.98	73.48