Regeneration Analysis of Bone Char Used in Water Defluoridation: Chemical Desorption Route, Surface Chemistry Analysis and Modeling

Table 1

Comparison of the fluoride adsorption capacities reported for commercial bone chars and other adsorbents. Adapted from Elvir-Padilla et al. [25].

Adsorbent	pH	T (°C)	q (mmol/g)
Regenerated commercial bone char	—	—	0.03
Commercial bone char	7	20–30	0.12–0.39
Cerium modified bone char	7	30	0.72
Aluminum hydroxide-coated zeolite from coal fly ash	6.0	25	0.95
Pinus roxburghii wood biochar	4.5	30	0.88