Selective ammonium removal material and preparation method and application thereof

A selective and deammonium technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. Environmental protection, easy industrial scale-up, stable material structure

Inactive Publication Date: 2019-02-19
TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a selective deammonization material and its preparation method and application

Method used

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  • Selective ammonium removal material and preparation method and application thereof
  • Selective ammonium removal material and preparation method and application thereof
  • Selective ammonium removal material and preparation method and application thereof

Examples

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preparation example Construction

[0027] The invention provides a kind of preparation method of selective deammonization material, comprises the following steps:

[0028] (1) Sodium ferrocyanide or potassium ferrocyanide and two kinds of transition metal salts are mixed with water respectively into corresponding sodium ferrocyanide or potassium ferrocyanide solution and two kinds of transition metal salt solutions;

[0029] (2) Under stirring conditions, sodium ferrocyanide or potassium ferrocyanide solution and two kinds of transition metal salt solutions are added dropwise to the receiving liquid at the same time, and aged to control the crystal shape to be spherical or cubic, and then Separation and cleaning;

[0030] (3) The cleaned material is dried to obtain powdery selective deammonization material A x m y N z [Fe(CN) 6 ] 2 , where A is Na or K, M and N are transition metal elements respectively, and M≠N, x, y, z satisfy the relationship: x+2y+2z=8, 0

[0031] The invention adop...

Embodiment 1

[0061] Example 1: Na 2 Zn 2 Cu[Fe(CN) 6 ] 2 preparation of

[0062] (1) Weigh 1 mol of sodium ferrocyanide, 2 mol of zinc sulfate and 1 mol of copper sulfate mixed solution into 1L of deionized water, respectively, to prepare 1 mol / L of sodium ferrocyanide solution, 2 mol / L of zinc sulfate and 1 mol / L of copper sulfate. L copper sulfate mixed solution;

[0063] (2) At the speed of 500rpm, add 1mol / L sodium ferrocyanide solution and 2mol / L zinc sulfate and 1mol / L copper sulfate mixed solution into 100mL pure water at the same time at a speed of 100ml / min, drop Keep magnetic stirring during the addition process, continue mixing and stirring for 2 hours after the addition is completed to obtain a reddish-brown turbid liquid, then age for 2 hours, and wash 5 times after centrifugation to obtain the selective deammonization material Na 2 Zn 2 Cu[Fe(CN) 6 ] 2 ;

[0064] (3) The selective deammonization material Na 2 Zn 2 Cu[Fe(CN) 6 ] 2 Place in a vacuum drying oven and...

Embodiment 2

[0065] Example 2: Na 2 CuCo 2 [Fe(CN) 6 ] 2 preparation of

[0066] (1) Weigh 0.5mol sodium ferrocyanide, 1mol copper sulfate and 0.5mol cobalt sulfate mixed solution, and 2mol sodium chloride and add them to 1L deionized water respectively to prepare 0.5mol / L sodium ferrocyanide solution, 1mol / L copper sulfate and 0.5mol / L cobalt sulfate mixed solution and 2mol / L sodium chloride solution;

[0067] (2) At a speed of 200rpm, add 0.5mol / L sodium ferrocyanide solution and 1mol / L copper sulfate and 0.5mol / L cobalt sulfate mixed solution to 100mL containing 2mol / L cobalt sulfate solution simultaneously at a speed of 100ml / min. In the sodium chloride solution of L, maintain magnetic stirring during the dropping process, continue mixing and stirring for 2 hours after the dropping is completed to obtain a reddish-brown turbid liquid, then age for 5 hours, and wash 6 times after centrifugation to obtain the selective deammonization material Na 2 CuCo 2 [Fe(CN) 6 ] 2 ;

[0068]...

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Abstract

The invention relates to the field of ammonia nitrogen adsorption materials, and discloses a selective ammonium material and a preparation method and application thereof. The preparation method of theselective ammonium material comprises the following steps of: (1) preparing sodium ferrocyanide or potassium ferricyanide and two kinds of transition metal salts with water respectively to form a corresponding sodium ferrocyanide or potassium ferricyanide solution and two transition metal salts solutions; (2) under a stirring conditions, dripping the sodium ferrocyanide or potassium ferricyanidesolution and the two transition metal salt solutions into a receiving solution at the same time and maturing to control the shape of the crystal to be spherical or cubic, then separating and cleaning;(3) drying the clean material to obtain powder selective ammonium material AxMyNz [Fe (CN) 6]2. The selective ammonium removal material has the advantages of high adsorption capacity, high selectivity, resistance to organic pollution and good regeneration ability.

Description

technical field [0001] The invention relates to an ammonia nitrogen adsorption material, in particular to a selective ammonium removal material and its preparation method and application. Background technique [0002] With the rapid development of industrial and agricultural production, a large amount of domestic sewage, industrial wastewater and agricultural chemical fertilizers enter rivers, lakes and other water bodies, which increases the ammonia nitrogen content in the water body, and excessive ammonia nitrogen will lead to eutrophication of the water body, algae reproduction, and serious deterioration of water quality. Animals are seriously threatened. For a long time, urban sewage treatment plants have mainly aimed at removing COD and SS, and the removal effect on ammonia nitrogen is not significant. Therefore, effectively reducing the concentration of ammonia nitrogen in sewage has become a new topic in the field of sewage treatment. Economical and applicable ammon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04B01J20/30C02F1/28C02F101/16C02F101/30
CPCB01J20/0229B01J20/0237B01J20/0244B01J20/04C02F1/281C02F2101/16C02F2101/30
Inventor 陈亦力张国军莫恒亮李锁定代攀许鑫杨志涛孟晓冬高士强
Owner TIANJIN BISHUIYUAN MEMBRANE MATERIAL CO LTD
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