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Method and apparatus for sorbent production, primarily for removing arsenic from drinking water

An adsorbent, drinking water technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sewage treatment, etc.

Inactive Publication Date: 2011-04-06
HM ELEKTRONIKAI LOGISZTIKAI & VAGYONKEZELO ZRT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the hydrated iron oxide particles on the surface of the support material, which are entrained with arsenic, can be easily washed away

Method used

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  • Method and apparatus for sorbent production, primarily for removing arsenic from drinking water
  • Method and apparatus for sorbent production, primarily for removing arsenic from drinking water

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Embodiment Construction

[0036] In the first saturation unit 1 , a carrier material container 9 is connected to the first autoclave 6 via a first carrier material inlet 7 . Like all other parts of the plant, the first autoclave 6 is a commercially available conventional device. The first autoclave 6 is also connected to a first solution tank 10 through a first solution inlet 8 . A ferric salt container 11 suitable for storing water-soluble ferrous salt is connected to the first solution tank 10 . Saturated carrier material is fed from the first autoclave 6 to the first filter 12 and from the first filter 12 to the first dryer 13 . The filtered ferrous salt solution is recycled from the first filter 12 to the first solution tank 10 .

[0037] In the second saturation unit 2 , the support material saturated with the iron salt solution is fed to the second autoclave 14 through the second support material inlet 15 . The second carrier material inlet 15 is connected to the first dryer 13 . The second a...

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Abstract

The object of the invention is method and apparatus for sorbent production. The method comprises the steps of saturating a moisture-absorbent, wettable organic support material with the aqueous solution of a water-soluble ferric salt, then filtering it and drying it to constant weight; saturating the support material with a stoichiometric quantity (computed relative to the iron content of the support material) of oxalic acid and / or water-soluble salt of oxalic acid, then filtering it and drying it to constant weight, while converting the iron ions to insoluble ferric oxalate; converting the saturated support material to activated carbon by anaerobic heating, then subjecting said saturated support material to anaerobic cooling, while the ferric oxalate is decomposed into iron and carbon dioxide; preoxidizing iron particles of the activated carbon by a water-soluble peroxide compound, filtering the activated carbon, and rinsing it to completely remove salt therefrom, then filtering it again and drying it; converting the iron hydroxide formed on the surface of the iron particles into magnetite by anaerobic heating of the activated carbon, and subsequently cooling in an anaerobic manner the thus produced sorbent to room temperature.

Description

technical field [0001] The present invention relates to a process for the production of adsorbents primarily for the removal of arsenic from drinking water. Background technique [0002] In recent years, the availability of drinking water sources has become a growing problem. This is caused by the exponential growth of the global population and dwindling sources of potable water, both due to increasing industrial and agricultural water use, and due to the contamination of drinking water reserves. Therefore, purification of existing drinking water sources is necessary to provide healthy water to an increasing number of the public. [0003] Of all the impurities present in drinking water, arsenic is the most harmful to human health. Although arsenic levels in natural water reserves can increase due to natural processes, industrial and agricultural activities are the main contributors to elevated arsenic levels. When ingested by humans, arsenic can cause serious poisoning ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/20B01J20/32C02F1/28
CPCB01J20/0229B01J20/20B01J20/32B01J20/3236B01J20/28009B01J20/06C02F1/283C02F1/288B01J20/3204
Inventor I·施雷默J·基斯-贝内德克L·埃伯特
Owner HM ELEKTRONIKAI LOGISZTIKAI & VAGYONKEZELO ZRT
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