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Preparation method of ammonium removing material for ferrous zinc sodium cyanide deammonium material and application of deammonium material to sewage ammonium removal

A technology of sodium ferrocyanide and zinc cyanide, applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve problems affecting the normal operation of the project, poor ammonium ion selectivity, low adsorption capacity, etc. problems, to achieve the effect of wide range of use, high adsorption selectivity, and improved adsorption selectivity

Active Publication Date: 2017-12-19
TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cation exchange resin has a relatively large exchange capacity, its selectivity to ammonium ions is very poor, and it can adsorb almost all cations in the water body. Moreover, the fatal shortcoming of the cation exchange resin is that it is easily polluted by charged organic substances in the water body and becomes invalid. normal operation of the project
Zeolite molecular sieve has certain selectivity to ammonium ion, but the biggest shortcoming of zeolite molecular sieve is that adsorption capacity is too low, causes the amount of adsorbent that regeneration is frequent or needs is too large (Wang Minghui etc., " 13X molecular sieve for ammonia nitrogen removal / Preparation and performance characterization of PES membrane adsorbent", Chinese Journal of Environmental Engineering, 2013, 1, 3749-3754.)

Method used

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  • Preparation method of ammonium removing material for ferrous zinc sodium cyanide deammonium material and application of deammonium material to sewage ammonium removal
  • Preparation method of ammonium removing material for ferrous zinc sodium cyanide deammonium material and application of deammonium material to sewage ammonium removal
  • Preparation method of ammonium removing material for ferrous zinc sodium cyanide deammonium material and application of deammonium material to sewage ammonium removal

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Take by weighing 0.2mol of zinc chloride, be dissolved in 200ml of deionized water, stir evenly to obtain a zinc chloride solution with a substance concentration of 1mol / L; weigh 0.2mol of Prussian blue sodium ferrocyanide, dissolve In 200ml of deionized water, stir evenly to obtain a sodium ferrocyanide solution with a substance concentration of 1mol / L; add 0.1mol of solid sodium chloride to the sodium ferrocyanide solution, stir evenly, and make Sodium chloride is completely dissolved in the sodium ferrocyanide solution to obtain a mixed solution of sodium ferrocyanide and sodium chloride; the zinc chloride solution is added dropwise to the mixed solution, and magnetic stirring is performed while adding. After completion, continue to stir for 2 hours to obtain a white suspension; let the white suspension stand still for 1 hour, precipitate, and centrifuge to obtain a white solid; wash the white solid with deionized water several times to obtain the ferrous Sodium zinc...

Embodiment 2

[0048] Take by weighing 0.6mol of zinc chloride, be dissolved in 200ml of deionized water, stir evenly to obtain a zinc chloride solution with a substance concentration of 3mol / L; weigh 0.6mol of Prussian blue sodium ferrocyanide, dissolve In 200ml of deionized water, stir evenly to obtain a sodium ferrocyanide solution with a substance concentration of 3mol / L; add 0.6mol of solid sodium chloride to the sodium ferrocyanide solution, stir evenly, and make Sodium chloride is completely dissolved in the sodium ferrocyanide solution to obtain a mixed solution of sodium ferrocyanide and sodium chloride; the zinc chloride solution is added dropwise to the mixed solution, and magnetic stirring is performed while adding. Continue to stir for 4 hours after completion to obtain a white suspension; let the white suspension stand still for 3 hours, precipitate, and centrifuge to obtain a white solid; wash the white solid with deionized water several times to obtain the ferrous Sodium zinc...

Embodiment 3

[0050] Weigh 0.1mol of zinc sulfate, dissolve it in 200ml of deionized water, and stir evenly to obtain a zinc sulfate solution with a concentration of 0.5mol / L; weigh 0.2mol of Prussian blue sodium ferrocyanide, dissolve in In 200ml of deionized water, stir evenly to obtain a sodium ferrocyanide solution with a substance concentration of 1mol / L; add 0.8mol of solid sodium chloride to the sodium ferrocyanide solution, stir evenly, and make the chlorine Sodium chloride is completely dissolved in the sodium ferrocyanide solution to obtain a mixed solution of sodium ferrocyanide and sodium chloride; the zinc sulfate solution is added dropwise to the mixed solution, and magnetic stirring is performed while the addition is completed. Stirring was continued for 6 hours to obtain a white suspension; the white suspension was left to stand for 4 hours, precipitated, and centrifuged to obtain a white solid; the white solid was washed with deionized water several times to obtain the ferro...

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Abstract

The invention provides a preparation method of an ammonium removing material of ferrous zinc sodium cyanide deammonium material and application of the deammonium material to sewage ammonium removal and belongs to the technical field of the sewage ammonium removal. A chemical formula of the ferrous zinc sodium cyanide is Na2ZnFe(CN)6; the preparation method of the material comprises the following steps: preparing a zinc salt solution and a ferrous sodium cyanide solution respectively; adding a certain mass of sodium chloride into the ferrous sodium cyanide solution to completely dissolve the sodium chloride into the ferrous sodium cyanide solution, so as to obtain a ferrous sodium cyanide and sodium chloride mixed solution; gradually dropwise adding the zinc salt solution into the mixed solution; carrying out magnetic stirring while dropwise adding the zinc salt solution; after dropwise adding the zinc salt solution, continually stirring to obtain white suspension liquid; standing and precipitating; centrifuging and separating to obtain white solids; repeatedly washing the white solids with de-ionized water to remove impurities; drying to obtain the ammonium removing material Na2ZnFe(CN). The ammonium removing material provided by the invention has the advantages of large ammonium ion adsorption capability, high adsorption selectivity, low production cost and stable performance.

Description

technical field [0001] The invention relates to the technical field of deammonization of sewage, in particular to a preparation method of a sodium ferrocyanide deammonization material and its application in deammonization of sewage, which is suitable for large-scale popularization and application. Background technique [0002] In my country, with the acceleration of urbanization, people's living standards are improving, environmental pollution and people's attention to the environment are getting stronger and stronger, while municipal sewage often contains a large amount of ammonium nitrogen, and excessive ammonia nitrogen will cause serious damage to the water body. Pollution. Studies have shown that when the concentration of ammonia nitrogen in surface water is about 5mg / L, it will have a toxic effect on fish. Therefore, wastewater containing higher concentrations of ammonia nitrogen must be treated before entering the water body. At present, the conventional treatment meth...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/30C02F1/28C02F101/16
CPCB01J20/0229B01J20/0244B01J20/0274B01J20/04C02F1/281C02F2101/16
Inventor 陈亦力莫恒亮杨志涛李锁定代攀李天玉孟晓冬张国军
Owner TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
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