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A kind of fluorine-modified hydrotalcite dephosphorization agent and its preparation method and application

A hydrotalcite and fluorine modification technology, which is applied in chemical instruments and methods, water pollutants, and other chemical processes, can solve problems such as low efficiency, low phosphorus stability, and secondary pollution, and achieve high adsorption stability , The risk of secondary pollution is small, and the effect of small risk

Active Publication Date: 2019-12-27
CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure hydrotalcite dephosphorization is based on the principle of adsorption, the efficiency is low, and the stability of phosphorus on hydrotalcite is not high, there is a risk of re-release of adsorbed phosphorus, which is easy to cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A fluorine-modified hydrotalcite phosphorus removal agent, the fluorine-modified hydrotalcite phosphorus removal agent includes the following components in terms of mass percentage:

[0041] Fluorine modified hydrotalcite 80%,

[0042] Fluorite 20%.

[0043] In this embodiment, the fluorine-modified hydrotalcite is fluorine-modified magnesium aluminum hydrotalcite.

[0044] A preparation method of the above-mentioned fluorine-modified hydrotalcite phosphorus removal agent of the present embodiment, comprising the following steps:

[0045] (1) Accurately weigh 7.7g of Mg(NO 3 ) 2 ·6H 2 O and 3.8g of Al(NO 3 ) 3 9H 2O was dissolved in 50 mL of distilled water to prepare solution A.

[0046] (2) Under nitrogen protection and stirring, slowly drop the solution A prepared in step (1) into 20 mL of distilled water, and at the same time add dropwise NaOH solution with a concentration of 0.1 mol / L to adjust the pH value of the solution to 10-11 to prepare Solution B is...

Embodiment 2

[0058] A fluorine-modified hydrotalcite phosphorus removal agent, the fluorine-modified hydrotalcite phosphorus removal agent includes the following components in terms of mass percentage:

[0059] Fluorine modified hydrotalcite 90%,

[0060] Fluorite 5%,

[0061] Dispersible clay 5%.

[0062] In this embodiment, the fluorine-modified hydrotalcite is fluorine-modified magnesium aluminum hydrotalcite.

[0063] In this embodiment, the dispersible clay is kaolin.

[0064] A preparation method of the above-mentioned fluorine-modified hydrotalcite phosphorus removal agent of the present embodiment, comprising the following steps:

[0065] (1) Accurately weigh 7.7g of Mg(NO 3 ) 2 ·6H 2 O and 3.8g of Al(NO 3 ) 3 9H 2 O was dissolved in 50 mL of distilled water to prepare solution A.

[0066] (2) Under nitrogen protection and stirring, slowly drop the solution A prepared in step (1) into 20 mL of distilled water, and at the same time add dropwise NaOH solution with a concent...

Embodiment 3

[0076] A fluorine-modified hydrotalcite phosphorus removal agent, the fluorine-modified hydrotalcite phosphorus removal agent includes the following components in terms of mass percentage:

[0077] Fluorine modified hydrotalcite 80%,

[0078] Fluorite 5%,

[0079] Dispersible clay 15%.

[0080] In this embodiment, the fluorine-modified hydrotalcite is fluorine-modified magnesium aluminum hydrotalcite.

[0081] In this embodiment, the dispersible clay is kaolin.

[0082] A preparation method of the above-mentioned fluorine-modified hydrotalcite phosphorus removal agent of the present embodiment, comprising the following steps:

[0083] (1) Accurately weigh 7.7g of Mg(NO 3 ) 2 ·6H 2 O and 3.8g of Al(NO 3 ) 3 9H 2 O was dissolved in 50 mL of distilled water to prepare solution A.

[0084] (2) Under nitrogen protection and stirring, slowly drop the solution A prepared in step (1) into 20 mL of distilled water, and at the same time add dropwise NaOH solution with a concen...

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Abstract

The invention discloses a fluorine-modified hydrotalcite phosphorus removal agent and its preparation method and application. The fluorine-modified hydrotalcite phosphorus removal agent comprises 80%-90% of fluorine-modified hydrotalcite, 5%-20% of fluorine stone and 0% to 15% dispersible clay. The preparation method comprises mixing fluorine-modified hydrotalcite, fluorite and dispersible clay, calcining and pulverizing to obtain the fluorine-modified hydrotalcite phosphorus removal agent. The fluorine-modified hydrotalcite phosphorus removal agent of the present invention has the advantages of high adsorption efficiency, strong adsorption capacity, high adsorption stability, long drug effect time, good dispersibility, and low risk of secondary pollution, and can be widely used to remove phosphorus in water bodies , has the advantages of simple process, convenient operation, low cost, high treatment effect, good removal effect, etc., and has high application value and good application prospect. The preparation method has the advantages of simple process, low requirements on equipment, etc., and is suitable for large-scale preparation and industrial application.

Description

technical field [0001] The invention belongs to the field of phosphorus removal agent preparation technology, and relates to a fluorine-modified hydrotalcite phosphorus removal agent and its preparation method and application. [0002] technical background [0003] Phosphorus is one of the essential elements for biological growth, but wastewater containing high concentrations of phosphorus (such as more than 0.2mg / L) will cause harm to aquatic animals such as fish and stimulate the excessive growth of aquatic plants such as algae after entering the environmental water body. There are eutrophic pollution phenomena such as red lakes and red tides. Therefore, how to effectively remove phosphorus in wastewater, especially low-concentration phosphorus, is of great significance for improving the effluent quality of existing sewage treatment plants, eliminating eutrophication of water bodies, and realizing the recycling of phosphorus. [0004] At present, domestic and foreign waste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/08B01J20/04B01J20/30C02F1/28C02F101/10
CPCB01J20/046B01J20/08B01J20/12B01J20/3021B01J20/3078C02F1/281C02F2101/105
Inventor 蒋晓云易亚男周宇健黄以林刘雅倩
Owner CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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