Application 06
Fluoride Removal
Groundwater in many regions carries fluoride above recommended drinking water levels.
Quick answer
How does activated alumina remove fluoride?
Activated alumina has a strong affinity for fluoride ions. As water passes through a packed bed, fluoride is held on the alumina surface. Performance depends on the water's pH, its other constituents and the contact time.
How it works
Activated alumina has a strong affinity for fluoride ions. As water passes through a packed bed, fluoride is held on the alumina surface.
Performance depends on the water's pH and composition, and on contact time. Exhausted beds are regenerated chemically or replaced.
- 01
Raw water
Contains fluoride above the target level.
- 02
Alumina bed
Water passes through a packed bed of alumina.
- 03
Uptake
Fluoride is held on the alumina surface.
- 04
Treated water
Leaves with fluoride reduced.
Product used for fluoride removal
What to consider
- Fluoride level and target
- Water pH and other ions present
- Bed size and contact time
- Regeneration arrangements
Industries
Fluoride Removal: common questions
Does pH affect fluoride removal with activated alumina?
Yes. Activated alumina removes fluoride most effectively in slightly acidic conditions, so pH is an important design factor.
Can activated alumina be regenerated after fluoride removal?
Yes. Exhausted beds are commonly regenerated chemically, typically with a sodium hydroxide wash followed by neutralisation.
Discuss your fluoride removal requirement
Tell us about your application and requirements. Our team will help you identify the appropriate product for your needs.
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