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Which material is used in contact filters for the removal of fluorides?

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in Environmental Engineering by (81.4k points)
Which material is used in contact filters for the removal of fluorides?

(a) Calcium phosphate

(b) Copper sulfate

(c) Synthetic tri-calcium phosphate

(d) Bone charcoal

The question was posed to me in an interview.

Origin of the question is Fluoridation and Defluoridation topic in chapter Miscellaneous Treatment Methods of Environmental Engineering

1 Answer

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Best answer
The correct option is (c) Synthetic tri-calcium phosphate

The explanation: Synthetic tri-calcium phosphate is used in contact filters for the removal of fluorides. It is made from the milk of lime and phosphoric acid.

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