Activated Alumina For Water Purification

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Activated Alumina Balls

• Activated Alumina For Water Purification

Activated alumina balls are highly capable of
adsorbing moisture and water vapors from the air
gases and provide clean, moisture-free air and
gas.
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Activated Alumina For Water Purification

• The dihydroxylation process produces activated
  alumina from aluminum hydroxide to give a porous
  solid object. These are widely used as desiccants
  and filters for water purification.
• Natural drinking water contains many minerals
  like fluoride, arsenic, selenium, etc. These
  minerals are the reasons for considering water as
  a precious part of our diet and good health. But
  if any of these minerals exceed the permitted
  limit, it can lead to severe health issues. Thus,
  the purification of water is highly recommended.
  In this article, we will see the role
  of activated alumina in water treatment. 

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Water purification by activated alumina

• The principle works in removing arsenic content
  by the activated alumina bed. Known as
  adsorption. The arsenic content in water may rise
  beyond the permissible boundaries due to deposits
  from industries, agricultural processes, or even
  through natural means. When in huge quantities,
  this will cause many health issues. 
• The water to be treated is allowed to pass
  through a bed of activated alumina under high
  pressure. More than one filter bed can be used
  back to back for improved results. The arsenic
  content gets adsorbed by activated alumina beds
  when passed continuously for a pre-determined
  time, and the processed water is collected for
  further use. 
• The quality of the activated alumina arsenic
  removal process depends on certain water factors
  under treatment, such as pH, water quality,
  presence of other impurities, and compound form
  of arsenic. Arsenic can be present in two forms,
  As (V) (arsenate) and As (III) (arsenite). It is
  recommended to process the water before it is
  passed through an activated alumina bed and
  oxidize the As (III) to As (V) because the
  alumina filter handles As (V) more efficiently.
  Also, the pH range of water is to be maintained
  within 5.0 to 6.0 for smooth and maximum
  adsorption.

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Benefits of using Activate Alumina

• One main benefit of using activated alumina for
  water treatment is that it is resistant to liquid
  water. This means it will not shrink, swell or
  get diluted when immersed in water for a long
  time. The activated alumina beds can be
  regenerated and reused. The high surface area and
  high adsorption capacity place the activated
  alumina as one of the best methods for water
  purification.
• Being one of the prime Activated alumina balls
  manufacturers, Sorbead India offers high-quality
  products at affordable prices around the globe.
  Contact us for more information.

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Alumina Balls For Arsenic Fluoride Removal
Alsorb-F a true grade of activated alumina has
long been considered the best technology for
fluoride removal from aqueous solutions. These
can be used to treat potable water for household
and municipal units as well as a great solution
for wastewater streams for removal of fluoride
and arsenic. The adsorptive process is simply
requiring a flow rate across the media with a
minimum of five minutes empty bed contact time.

• Alsorb-F is an aluminum oxide that is highly
  porous and exhibits high surface area. The
  crystal structure of alumina contains cation
  lattice discontinuities giving rise to localized
  areas of positive charge this makes alumina
  attract various anionic species.
• Our alumina balls have a high preference for
  fluoride compared to other anionic species and
  hence is an attractive adsorbent. It also does
  not shrink, swell, soften nor disintegrate when
  immersed in water.

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The effectiveness of alumina balls for arsenic
fluoride removal is the media to adsorb fluoride
is affected by a number of factors.

• Influent Fluoride or Arsenic Level  The capacity
  is bound by basic adsorption theory, the greater
  the concentration of impurity, the higher
  adsorptive capacity of the media.
• pH Level The pH level also has a large impact on
  the ability to adsorb F. The optimum pH level
  should be from 5.5 to 6.5. Adjustment is easily
  accomplished with the same solutions as
  regeneration.
• Contact Time 5 minute Empty Bed Contact Time
  achieves the best balance of adsorption capacity
  and capital cost.
• Competing Ions Fluoride and Arsenic are strongly
  attracted to activated alumina leaving few
  competing water contaminants. Silica can reduce
  the adsorption capacity, although silica effect
  is limited when pH adjustment is employed.
  Systems, where silica levels are higher than 30
  ppm, may require more frequent and aggressive
  regeneration.
• Preconditioning Activated Alumina The capacity
  of the activated alumina is greatly enhanced
  after conditioning. The first regeneration act as
  a conditioning step. Note that the first
  treatment of non-preconditioned AA will yield a
  capacity of 30 less than subsequent cycles after
  regeneration.

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