Table 8.

Adsorption capacities (AC) and other parameters for the removal of fluoride by Natural materials

Adsorbent	AC (mg/g)	CR (mg/L)	pH	Ref.
Lignite, Fine coke and Bituminous coal	6.9-7.4	3-90	5-10	[99]
Fired clay chips	7.2-9.0	5-20	5-7	[101]
Tamarindus indica Fruit Shells (TIFSs)	22.3	2-8	7	[105]
Pumice stone	41	10	3-10	[107]