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Preparation method of Prussian blue compound deammonization material and application in deammonization of sewage

A Prussian blue and compound technology, applied in the field of Prussian blue compound deammonization material preparation, can solve the problems affecting the normal operation of the project, poor ammonium ion selectivity, low adsorption capacity, etc., to achieve safe and environmentally friendly use, high adsorption selectivity , Improve the effect of adsorption selectivity

Active Publication Date: 2020-07-21
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, and 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 sieves have certain selectivity to ammonium ions, but the biggest shortcoming of zeolite molecular sieves is that the adsorption capacity is too low, resulting in frequent regeneration or the amount of adsorbent required is too large (Wang Minghui et al., "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 Prussian blue compound deammonization material and application in deammonization of sewage
  • Preparation method of Prussian blue compound deammonization material and application in deammonization of sewage
  • Preparation method of Prussian blue compound deammonization material and application in deammonization of sewage

Examples

Experimental program
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Effect test

Embodiment 1

[0047] 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, and stir evenly to 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 2 hours after completion 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 Prussian blue Comp...

Embodiment 2

[0049] Take by weighing the cupric chloride of 0.6mol, be dissolved in the deionized water of 200ml, stir evenly, obtain the cupric chloride solution that the amount concentration of substance is 3mol / L; Take by weighing the Prussian blue class sodium ferrocyanide of 0.6mol, 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 copper 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 s...

Embodiment 3

[0051] Weigh 0.1mol of nickel sulfate, dissolve it in 200ml of deionized water, and stir evenly to obtain a nickel sulfate solution with a concentration of 0.5mol / L; weigh 0.2mol of Prussian blue potassium ferrocyanide, dissolve in In 200ml of deionized water, stir evenly to obtain a potassium ferrocyanide solution with a substance concentration of 1mol / L; add 0.8mol of solid potassium chloride to the potassium ferrocyanide solution, stir well, and make the chlorine Potassium chloride is completely dissolved in the potassium ferrocyanide solution to obtain a mixed solution of potassium ferrocyanide and potassium chloride; the nickel sulfate solution is added dropwise to the mixed solution, and magnetic stirring is carried out while the dropwise 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 ...

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Abstract

The invention provides a prussian-blue compound ammonium removal material, which belongs to the technical field of sewage ammonium removal. A prussian-blue compound has a chemical formula as A2MFe(CN)6, wherein A is Na<+> or K<+>, and M is one of Zn<2+>, Cu<2+>, Ni<2+>, Co<2+> or Mn<2+>. A preparation method of the material comprises the following steps of respectively preparing a transition metal salt solution and a ferrocyanogen complex solution; adding a certain mass of corresponding solid chloride into the ferrocyanogen complex solution, enabling the chloride to completely dissolve into the ferrocyanogen complex solution, and thus obtaining a mixed solution of a ferrocyanogen complex and the chloride; gradually dropwise adding the transition metal salt solution into the mixed solution, magnetically stirring while dropwise adding, continuously stirring after finishing dropwise adding, thus obtaining a white suspension, and carrying out still settlement and centrifugal separation to obtain white solids; using deionized water for repetitively cleaning and removing impurities, and drying to obtain the ammonium removal material. The ammonium removal material provided by the invention has the advantages of large adsorption capacity on ammonium ions, high adsorptive 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 Prussian blue compound 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 m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/04C02F1/28B01J20/30C02F101/16
CPCB01J20/0222B01J20/0225B01J20/0229B01J20/0237B01J20/0244B01J20/0259B01J20/04C02F1/281C02F2101/16
Inventor 陈亦力杨志涛莫恒亮李锁定代攀李天玉肖宏康孟晓冬张国军高士强许鑫
Owner TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
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