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Granular adsorbent as well as preparation method and application of granular adsorbent in adsorption of ammonia nitrogen

A particle adsorbent and adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of single composition, environmental pollution, poor ammonia nitrogen adsorption effect, etc., and achieve large adsorption capacity. , the adsorption effect is good, the effect of reducing the treatment cost

Inactive Publication Date: 2015-04-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, most of the adsorbent components are relatively single, and its modification technology may cause pollution to the environment, and it is usually treated for low-concentration ammonia-nitrogen wastewater, and the adsorption effect on ammonia nitrogen in high-concentration ammonia-nitrogen wastewater is not good.

Method used

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  • Granular adsorbent as well as preparation method and application of granular adsorbent in adsorption of ammonia nitrogen
  • Granular adsorbent as well as preparation method and application of granular adsorbent in adsorption of ammonia nitrogen
  • Granular adsorbent as well as preparation method and application of granular adsorbent in adsorption of ammonia nitrogen

Examples

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Effect test

Embodiment 1

[0025] Mix 2g of red jade soil, 2g of Kanuma soil, 3g of natural zeolite powder, 2.5g of soluble starch, and 1g of sodium sulfate, add deionized water to make a paste, and artificially shape it into spherical particles with a diameter of 2–3mm. Dry for 24 hours, sinter in a muffle furnace at 600°C for 1.5 hours, cool to room temperature, and store directly in plastic PE bottles, sealed and kept at a constant temperature.

Embodiment 2

[0027] Mix 5g of red jade soil, 3.5g of montmorillonite, 3g of cornstarch, and 1.5g of sodium nitrate, add deionized water to make a paste, artificially form spherical particles with a particle diameter of 2-3mm, and dry at 90°C for 20h. Sinter in a muffle furnace at 400°C for 2h, cool to room temperature, and store directly in plastic PE bottles, sealed and kept at a constant temperature.

Embodiment 3

[0029] Mix 5g of deer marsh soil, 4g of bentonite, 1g of urea, and 2g of sodium chloride thoroughly, add deionized water to make a paste, artificially shape it into spherical particles with a particle diameter of 2–3mm, dry at 110°C for 24h, and place in a muffle furnace Sinter at 550°C for 1.5h, cool to room temperature, store directly in plastic PE bottles, seal and store at constant temperature.

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Abstract

The invention discloses a granular adsorbent as well as a preparation method and application of the granular adsorbent in adsorption of ammonia nitrogen. The granular adsorbent comprises the following components in parts by weight: 3-5 parts of a framework material, 3-4 parts of an adhesive, 1-3 parts of a pore-forming agent and 1-2 parts of functional substances, wherein the framework material is Kanuma soil or Akadama soil; the binder is bentonite, natural zeolite powder or montmorillonite; the pore-forming agent is corn starch, soluble starch, polyvinylpyrrolidone or urea; and the functional substances are sodium chloride, sodium sulfate or sodium nitrate. The preparation method comprises the following steps of uniformly mixing the components to obtain a mixture, adding deionized water into the mixture, blending into paste, molding, drying and sintering for a sintering time of 1-2 hours at 400-800 DEG C. The granular adsorbent has the advantages of wide sources, low cost, high adsorption performance to ammonia nitrogen in high-concentration ammonia nitrogen wastewater, no need of further treatment and no secondary pollution to the environment.

Description

technical field [0001] The invention belongs to the field of synthesis and application of adsorption materials, and more specifically relates to a granular adsorbent synthesized from different clay minerals for removing ammonia nitrogen in wastewater and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of industry, rare earth, chemical, steel and other industries have produced a large amount of high-concentration ammonia nitrogen wastewater. If it is discharged directly without treatment, the oxidation of ammonia nitrogen will lead to a decrease in the concentration of dissolved oxygen in the water, causing the river water to turn black. Smelly, water quality seriously deteriorated. At the same time, excessive nitrogen content in water will cause a sharp increase in algae, causing eutrophication of water bodies. Under favorable environmental conditions, ammonia nitrogen will be further converted into nitrite nitrogen an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/12B01J20/30C02F1/28C02F101/16
CPCB01J20/103B01J20/041B01J20/06B01J20/08B01J20/28016B01J20/28059B01J20/28083C02F1/281C02F2101/16
Inventor 赵迎新季民郑心怡
Owner TIANJIN UNIV
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