Activated Alumina For Water Purification

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

2. 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. 

3. 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.

4. 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 primeActivated alumina balls manufacturers, Sorbead India offers high-quality products at affordable prices around the globe. Contact us for more information.

5. 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.

6. 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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