Efficient electric promoting absorptive fluorine removal adsorbent and preparation method thereof

An adsorbent and high-efficiency technology, used in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve problems to be improved, limited adsorption effect, etc., to promote adsorption effect, reduce dosage, and promote adsorption. Effect

Inactive Publication Date: 2012-02-01
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on granular electrodes is mostly concentrated in the fields of electrochemical degradation of organic pollution and recovery of polluted metals in water bodies. The adsorption effect is still limited and needs to be further improved.
[0005] Therefore, at present, the above two methods for removing fluoride have defects in the effect of removing fluoride and industrial application, and need to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 Preparation of Composite Electrodefluorination Adsorbent

[0034]1) The hydrated zirconium oxyhydroxide, conductive carbon black and dispersing agent are mixed evenly according to the mass percentage of 83:13:4 to prepare a conductive mixture. The dispersing agent is a mixed solution of absolute ethanol and montmorillonite (the ratio is 4:1mL / g);

[0035] 2) Mix the conductive mixture and the binder evenly, and place it in a molding mold to make a material of the desired shape;

[0036] 3) The above materials are dried in an oven to obtain a composite adsorbent for electrocatalyzed defluorination.

[0037] Using conductive carbon black as the electrode material and applying a DC voltage of 5V, the raw water containing fluorine ion concentration of 10mg / L was electroadsorbed without adding metal oxides. It was found that the treatment effect was very poor, and the fluoride ion could not be removed When the concentration is reduced to 1mg / L, if other conditio...

Embodiment 2

[0040] Example 2 Preparation of Composite Electrodefluorination Adsorbent

[0041] 1) The hydrated zirconium oxyhydroxide, conductive carbon black and dispersant are mixed evenly in a mass percentage of 70:26:4 to prepare a conductive mixture. The dispersant is a mixed solution of absolute ethanol and montmorillonite (the ratio is 4:1mL / g);

[0042] 2) Mix the conductive mixture and the binder evenly, place the material in the molding mold to produce the desired shape, and the binder is the esterification product of polyvinyl alcohol and carboxylic acid;

[0043] 3) The above materials are dried in an oven to obtain a composite adsorbent for electrocatalyzed defluorination.

[0044] The electro-adsorption fluorine removal test with conductive carbon black as the electrode material is the same as in Example 1.

[0045] When the fluoride ion concentration in the raw water is 10mg / L, the SV is 5h -1 , when the particle filling mass is 20g, the fluoride ion concentration in th...

Embodiment 3

[0047] Example 3 Preparation of Composite Electrodefluorination Adsorbent

[0048] 1) The activated alumina powder, the conductive carbon black and the dispersant are uniformly mixed in a mass percentage of 80:17:3 to obtain a conductive mixture, and the dispersant is 12% sodium hexametaphosphate solution.

[0049] 2) Mix the conductive mixture and the binder evenly, place the material in the molding mold to produce the desired shape, and the binder is the esterification product of polyvinyl alcohol and carboxylic acid;

[0050] 3) The above materials are dried in an oven to obtain a composite adsorbent for electrocatalyzed defluorination.

[0051] The electro-adsorption fluorine removal test with conductive carbon black as the electrode material is the same as in Example 1.

[0052] When the fluoride ion concentration in the raw water is 10mg / L, the SV is 5h -1 , when the particle filling mass is 20g, the fluoride ion concentration in the effluent reaches 1mg / L as the end p...

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Abstract

The invention relates to the field of fluorine removal, in particular to an efficient electric promoting absorptive fluorine removal adsorbent and a preparation method thereof. The composite efficient electric promoting absorptive fluorine removal adsorbent provided by the invention comprises an active metal oxide, a conductive material and a dispersant. The fluorine removal adsorbent provided bythe invention is a composite absorption system containing a hydrous metal oxide and carbon material, promotes to absorb fluorine by using the non-characteristic adsorption and characteristic adsorption of double electrode layers in the reaction process and an exchange reaction between a fluorine removal material and a fluorinion, and has large absorption capability and a wide application range.

Description

technical field [0001] The invention relates to the field of fluorine removal, in particular, the invention relates to a high-efficiency composite electro-catalyzed fluorine removal adsorbent. Background technique [0002] Fluorine is one of the essential trace elements in the human body. Proper intake of fluorine in the human body can make bones and teeth firm, reduce the incidence of dental caries, and is also beneficial to the excitatory conduction of the nervous system, calcium and phosphorus metabolism, parathyroid function, cell enzyme system and reproductive process. However, excessive intake of fluoride can also produce various poisoning symptoms, and long-term intake of excessive fluoride can also cause cancer and teratogenic effects. Therefore, controlling the intake of fluorine is of great significance to human health. [0003] Almost all natural water contains fluoride ions. Drinking water is the largest source of fluorine intake for the human body. China is al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/48C02F1/58C02F101/14
Inventor 梁文艳许佳王毅力豆小敏
Owner BEIJING FORESTRY UNIVERSITY
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