Comparison of Water Defluoridation Using Different Techniques

Table 2

Characteristics of fluoride materials [5].

Material	Chemical composition	Fluorine rate (%)
Fluorapatite	Ca3(PO4)3F	4
Bastnaesite	(Ce, La) (CO3)F	9
Cryolite	Na3AlF6	45
Fluorite (fluorspar)	CaF2	49
Villianmite	NaF	55
Sellaite	MgF2	61