Assessment of the Use of Epicarp and Mesocarp of Green Coconut for Removal of Fluoride Ions in Aqueous Solution

Table 3

The Langmuir and Freundlich models constants.

Model	Epicarp			Mesocarp
Langmuir model	25°C	35°C	45°C	25°C	35°C	45°C
(mg·g^−1)	1.6909	2.2265	1.8176	1.8021	1.7802	3.2253
(L·mg^−1)	1.1338	1.0448	1.8537	2.0968	1.1465	1.1874
	0.9689	0.9904	0.9648	0.9652	0.9594	0.9863
	−43.0679	−49.5204	−37.8549	−37.5464	−35.8396	−42.9539
Freundlich model
()	0.1439	0.1978	0.6290	0.5687	0.8536	1.7757
	1.2490	1.2053	1.4515	1.3822	1.4230	1.1868
	0.9595	0.9856	0.9521	0.9544	0.9468	0.9816
	−41.2255	−46.6851	−35.7090	−35.6467	−33.9463	−40.8807