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1 June, 09:21

How is fluorine separated from other materials found with it?

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  1. 1 June, 11:07
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    The following processes are used for fluorine removal:

    1. filtration through activated alumina - this is the most widely used process

    2. coagulation-flocculation - or aluminum sulphate treatment - can only be used on raw water that requires sedimentation and that has low fluoride content.

    3. lime used to soften water - This method can be used but with a pH >10 and provided that the water has a sufficient magnesium level (high) because it is the magnesium oxide that will adsorb the fluorine. Approximately 50 mg · L-1 of magnesium is required to remove 1 mg · L-1 of fluorine.

    4. using tricalcium phosphate

    5. other processes

    · reverse osmosis

    · Electrodialysis
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