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Water treatment agent based on laminated composite metal hydroxide and preparation method of water treatment agent

A hydroxide and layered composite technology, applied in the direction of oxidized water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of complex preparation, high cost, difficult regeneration, etc., and achieve simple preparation process, The effect of low cost and reproducible products

Inactive Publication Date: 2017-04-26
XIAN TECHNOLOGICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-efficiency multifunctional water treatment agent based on layered composite metal hydroxides with high stability, environmental friendliness and easy regeneration, and provide a simple and low-cost water treatment agent for the above water treatment agent at the same time. Preparation method to overcome the problems of high cost, complicated preparation and difficult regeneration of existing water treatment agents

Method used

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  • Water treatment agent based on laminated composite metal hydroxide and preparation method of water treatment agent

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A method for preparing a water treatment agent based on layered composite metal hydroxides includes the following steps in sequence:

[0036] (1) Prepare a mixed solution of magnesium nitrate and aluminum nitrate with a concentration of 1 mol / L as solution A, and the molar ratio of magnesium to aluminum ions in solution A is 2:3;

[0037] (2) Prepare a mixed lye composed of sodium hydroxide and sodium carbonate as solution B, in which the molar concentration of sodium carbonate is 1.2 mol / L and the molar concentration of sodium hydroxide is 1.6 mol / L;

[0038] (3) Drop A solution and B solution into 200 mL deionized water at a constant speed of 200 mL / h, keep stirring throughout the titration process; continue to stir evenly after the titration is completed, and let stand for 3 hours in a water bath at 80°C for crystallization;

[0039] (4) Centrifugally separate the crystallization mixture and wash the solid with deionized water, recrystallize with ethanol, dry at 80 degrees, a...

Embodiment 2

[0044] A method for preparing a water treatment agent based on layered composite metal hydroxides includes the following steps in sequence:

[0045] (1) Prepare a mixed solution of magnesium nitrate and aluminum nitrate with a concentration of 1 mol / L as solution A, and the molar ratio of magnesium to aluminum ions in solution A is 1:1;

[0046] (2) Prepare a mixed lye composed of sodium hydroxide and sodium carbonate as solution B, in which the molar concentration of sodium carbonate is 1.2 mol / L and the molar concentration of sodium hydroxide is 1.6 mol / L;

[0047] (3) Drop A solution and B solution into 200 mL deionized water at a constant speed of 200 mL / h, and keep stirring throughout the titration process. After the titration is completed, continue to stir evenly, and let it stand for 3 hours to crystallize in a water bath at 80°C;

[0048] (4) Centrifugal separation and wash the obtained solid with deionized water, recrystallize with ethanol, dry at 80 degrees, and grind;

[004...

Embodiment 3

[0052] A method for preparing a water treatment agent based on layered composite metal hydroxides includes the following steps in sequence:

[0053] (1) Prepare a mixed solution of zinc nitrate and aluminum nitrate with a concentration of 1 mol / L as solution A, and the molar ratio of zinc and aluminum ions in solution A is 4:1;

[0054] (2) Prepare a mixed lye composed of sodium hydroxide and sodium carbonate as solution B, in which the molar concentration of sodium carbonate is 1.2 mol / L and the molar concentration of sodium hydroxide is 1.6 mol / L;

[0055] (3) Drop A solution and B solution into 200 mL deionized water at a constant speed of 200 mL / h, and keep stirring throughout the titration process. After the titration is completed, continue to stir evenly, and stand for crystallization in a water bath at 80°C for 24 hours;

[0056] (4) Centrifugal separation and wash the obtained solid with deionized water, recrystallize with ethanol, dry at 80 degrees, and grind;

[0057] (5) Pla...

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Abstract

The invention discloses a water treatment agent based on laminated composite metal hydroxide and a preparation method of the water treatment agent. The water treatment agent is prepared from the laminated composite metal hydroxide and hydrogen peroxide under the action of a stabilizer under a low-temperature condition, wherein the ratio of divalent metal ions to trivalent metal ions in the laminated composite metal hydroxide is at 2: 3-5: 1; carbonate anions are intercalated between laminae; the stabilizer is magnesium sulfate, magnesium nitrate, sodium stannate or organic phosphate; the ratio of the stabilizer to the hydrogen peroxide is 0.3-0.6%; and the multifunctional efficient water treatment agent is prepared in accordance with a technological process comprising the following steps: preparing the laminated composite metal hydroxide, conducting ethanol recrystallizing, conducting drying and grinding, adding obtained powder to the hydrogen peroxide containing the stabilizer, conducting stirring in an ice bath, conducting suction filtering and conducting drying. The water treatment agent, when applied to wastewater treatment, can solve the problem of a conventional water treatment agent which is difficult in regeneration. The treatment agent is simple in preparation process and low in cost; and the treatment agent can be applied to wastewater in a large scale so as to simultaneously and efficiently remove various pollutants, and the treatment agent can be regenerated easily.

Description

Technical field [0001] The invention relates to the technical field of water treatment agents, in particular to a water treatment agent based on a layered composite metal hydroxide and a preparation method thereof. Background technique [0002] There are many forms and types of water pollution, and many pollutants coexist in polluted water bodies. There are also various treatment methods and methods for different pollutants, especially the environmental problems caused by heavy metals and difficult-to-degrade organic pollutants in water bodies. In order to achieve the simultaneous and efficient removal of multiple pollutants in the water body, the research and development of efficient and multifunctional water treatment agents is imperative; [0003] Currently known multi-effect water treatment agents are in various forms, but the general preparation methods are complicated and costly, and few water treatment agents have the properties of self-buffering, regeneration, adsorption a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/00C01G3/00C01G9/00C01G51/00C02F1/28C02F1/72C02F101/30
CPCC01G3/006C01G9/006C01G51/006C02F1/281C02F1/288C02F1/722C02F2101/30C01F7/785
Inventor 王倩王晓飞石春蕾
Owner XIAN TECHNOLOGICAL UNIV
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