Activated
Alumina Defluorination Agent
Yuanying activated alumina defluorination agent is white spherical porous particles, uniform
particle size, smooth surface, high mechanical strength, hygroscopicity strong,
does not crack and inflate after absorbing water. It
is non-toxic, tasteless, odorless, insoluble in water and organic solvents.
Fluorine is one of the trace element necessary for
animal and human. Adult normal daily intake should be 2~3 mg, too much or too
little can lead to disease, so defluorination is important in drinking water.
Activated alumina has good strength, good abrasion resistance, long service
life, stable performance, high defluorination capacity, after defluorination
the water quality accords with national health standards, so activated alumina
is one of the indispensable material in water treatment.
Activated alumina has
amphoteric adsorption properties, by regulating the PH value of aqueous
solution, anions in aqueous solution can be detached. Activated alumina defluorination
equipment is similar to ion exchanger, in order to obtain high defluorination
capacity, need to lower PH value, while the PH value is 5.5 activated alumina
adsorption rate of fluorine is the largest. In order to meet the quality
requirement and control corrosion, PH values should be slightly acidic.
Activated alumina defluorination is similar to the anion exchange resin, but
the selectivity for fluoride ion is larger than the anion resin. Activated
alumina widely used for fluoride removal in high fluoride area, cyclic alkanes
defluorination agent among alkylbenzene production.
Smaller particle size
can increase specific surface area, make a fully contact between activated
alumina and water. For example, commonly used 1-3 mm, 0.4-1.2 mm, their specific
surface area are generally more than 320 m2/g. High specific surface area means
huge number of micropore, it can ensure a strong adsorption of fluoride ion in
water. When raw water PH value and alkalinity is lower, defluorination capacity
of activated alumina is higher, fluoride absorption of
per cubic meter activated alumina is 6400 grams, fluoride absorption capacity
is greater than 4.0mg/g, and the price is lower than synthetic resin. This
product can also be used for dearsenification, wastewater decolorizing,
deodorizing, etc.
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