Defluoridation with Locally Produced Thai Bone Char

Table 3

Comparison of fitted Freundlich sorption isotherm parameters for different sizes of bone char found in this study with parameters from other publications.

Bone char size (mm)			pH	Type of bone char	Reference
2.38–4.74	0.053	0.728	8	Charred by homemade furnace	This work
1.19–2.37	0.059	0.792	8	Charred by homemade furnace	This work
0.841–1.18	0.050	0.610	8	Charred by homemade furnace	This work
<0.841	0.136	0.633	8	Charred by homemade furnace	This work
0.79	2.710	0.284	7	Commercial BC	Medellin-Castillo et al. 2007 [21]
0.79	0.870	0.339	10	Commercial BC	Medellin-Castillo et al. 2007 [21]
0.5–1.0	0.549	0.510	N/A	Charred by electric furnace	Kawasaki et al. 2009 [22]
0.65	2.840	0.328	7	Commercial BC	Leyva-Ramos et al. 2010 [23]
0.79	2.720	0.289	7	Commercial BC	Leyva-Ramos et al. 2010 [23]
1.29	1.950	0.435	7	Commercial BC	Leyva-Ramos et al. 2010 [23]

*A synthetic solution was used in these tests.
N/A: pH condition was not reported.