Pink Kaolin (PK) having high FeO content was processed and batch defluoridation studies were carried out. The effect of contact time, pH and in presence of other coexisting anions on the defluoridation capacity (DC) of PK were studied and the conditions were optimized.

The soil samples from selected fluoride environments in Dindigul district of Tamil Nadu is South India were analyzed for total and soluble fluoride. (2007)