Development of Kaolin Clay as a Cost-Effective Technology for Defluoridation of Groundwater

Table 3

Langmuir and Freundlich isotherm models for adsorbents AC and RC.

Types of the adsorbent	Langmuir isotherm parameters			Freundlich isotherm parameters
	qm (mg/g)	KL (L/mg)	R^2	Kf (mg/g)	n	R^2
Activated clay	0.179	0.817	0.998	2.315	1.34	0.999
Raw clay	0.070	1.348	0.9906	1.617	0.85	0.9943