At which temperature, the bone is calcinated during defluoridation with calcium phosphate?
(a) 100-200^oC
(b) 200-300^oC
(c) 400-600^oC
(d) 500-800^oC
The question was posed to me in an interview for job.
This intriguing question comes from Fluoridation and Defluoridation in chapter Miscellaneous Treatment Methods of Environmental Engineering