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Magnetic porous iron-zirconium bimetal composite coagulant aid as well as preparation method and application thereof

A porous iron, bimetallic technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of poor fluoride ion adsorption capacity, low adsorption rate, secondary pollution, etc. , to achieve the effect of simple and easy operation of the synthesis method and process, increase of surface active groups, and overcoming difficulty in regeneration

Active Publication Date: 2020-07-31
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a preparation method of a magnetic porous iron-zirconium bimetallic composite coagulant, compared with the shortcomings of aluminum-based adsorption materials that aluminum is easy to dissolve and cause secondary pollution, iron Zirconium bimetallic composite coagulant is more stable and exists in water in the form of colloid. It can realize the two functions of rapid adsorption of fluoride ion and rapid coagulation aid at the same time, which solves the problem of poor adsorption capacity and low adsorption rate of traditional adsorption materials for fluoride ion, which are easy to cause Secondary pollution, difficult to separate from water, and the preparation method is simple and easy to implement

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  • Magnetic porous iron-zirconium bimetal composite coagulant aid as well as preparation method and application thereof

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Embodiment 1

[0029] A preparation method of a magnetic porous iron-zirconium bimetallic composite coagulant, comprising the following steps:

[0030] Step 1. Disperse zirconium sulfate and iron sulfate in 3:1 molar ratio (zirconium sulfate 28.34g, iron sulfate 13.33g) in 300mL pure water, stir and mix evenly to obtain a mixed solution;

[0031] Step 2, adding sodium hydroxide solution to the mixed solution to adjust the pH to 8.0 to obtain an iron / zirconium hydroxide mixed solution;

[0032] Step 3, stirring the iron / zirconium hydroxide mixed solution under hydrothermal conditions, adding 40 g of glacial acetic acid, and reacting in an oil bath at 80° C. for 2 hours to obtain an iron / zirconium oxide colloidal solution;

[0033] Step 4, putting the iron / zirconium oxide colloidal solution into a high-pressure reactor and heating at 180°C for 1 day, and cooling naturally after the reaction;

[0034] Step 5. The cooled reaction product is separated and extracted by centrifugation, dried at 60...

Embodiment 2

[0037] A preparation method of a magnetic porous iron-zirconium bimetallic composite coagulant, comprising the following steps:

[0038] Step 1. Disperse zirconium sulfate and iron sulfate in 250mL pure water at a molar ratio of 2:1 (zirconium sulfate 18.89g, iron sulfate 13.33g), stir and mix evenly to obtain a mixed solution;

[0039] Step 2, adding sodium hydroxide solution to the mixed solution to adjust the pH to 9.0 to obtain a mixed solution of iron / zirconium hydroxide;

[0040] Step 3. Stir the iron / zirconium hydroxide mixed solution under hydrothermal conditions, add 30 g of glacial acetic acid, and mature for 3 hours in an oil bath at 80° C. to obtain an iron / zirconium oxide colloidal solution;

[0041] Step 4, putting the iron / zirconium oxide colloidal solution into a high-pressure reactor and heating at 160°C for 1 day, and cooling naturally after the reaction;

[0042] Step 5. The cooled reaction product is separated and extracted by centrifugation, dried at 70° ...

Embodiment 3

[0045] A preparation method of a magnetic porous iron-zirconium bimetallic composite coagulant, comprising the following steps:

[0046] Step 1. Disperse zirconium sulfate and iron sulfate in 1:1 molar ratio (zirconium sulfate 9.45g, iron sulfate 13.33g) in 200mL pure water, stir and mix evenly to obtain a mixed solution;

[0047] Step 2, adding sodium hydroxide solution to the mixed solution to adjust the pH to 8.5 to obtain a mixed solution of iron / zirconium hydroxide;

[0048] Step 3. Stir the iron / zirconium hydroxide mixed solution under hydrothermal conditions, add 30 g of glacial acetic acid, and mature for 2 hours in an oil bath at 80° C. to obtain an iron / zirconium oxide colloidal solution;

[0049] Step 4, putting the iron / zirconium oxide colloidal solution into a high-pressure reactor and heating at 140°C for 2 days, and cooling naturally after the reaction;

[0050] Step 5. The cooled reaction product is separated and extracted by centrifugation, dried at 60° C., a...

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Abstract

The invention discloses a magnetic porous iron-zirconium bimetal composite coagulant aid as well as a preparation method and application thereof. Zirconium sulfate and ferric sulfate are dispersed inpure water, the pH is adjusted to be weakly alkaline, glacial acetic acid is added under the heating condition for a reaction to obtain an iron hydrate / zirconium oxide colloidal solution, and the ironhydrate / zirconium oxide colloidal solution reacts under the high-pressure and high-temperature atmosphere to obtain a target product. The synthesis process is simple, the surface of the prepared magnetic porous iron-zirconium bimetal composite coagulant aid is rich in hydroxyl, sulfate radical active groups and metal ion active sites, the coagulant aid exists in a water body in a colloid form, and the two effects of fluorine ion rapid adsorption and rapid coagulation assistance can be achieved at the same time. After a conventional flocculating agent is added, the colloid state can be immediately converted into a floc state and finally settles down, rapid separation of water and mud is achieved, secondary pollution to a water body is avoided, and the used magnetic porous iron-zirconium double-metal composite coagulant aid can be recycled and reused through soaking, magnetic recovery and drying.

Description

technical field [0001] The invention belongs to the technical field of drinking water treatment, and in particular relates to a magnetic porous iron-zirconium bimetal composite coagulant and its preparation method and application. Background technique [0002] Fluorine is one of the trace chemical elements ubiquitous in nature. It is an indispensable substance for maintaining the growth of animal and plant bones and teeth. However, excessive intake of fluoride ions will lead to a series of diseases, such as dental fluorosis, skeletal fluorosis, and kidney, liver and brain lesions, causing abnormal immune function, and even life-threatening in severe cases. my country's "Drinking Water Sanitation Standard" (GB5749-2006) clearly stipulates that the fluorine content in drinking water should be less than 1.0mg / L. According to statistics, there are currently more than 50 million people in my country who have used water that seriously exceeds the standard for fluoride ions as the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F1/28C02F1/52
CPCC02F1/583C02F1/281C02F1/5236
Inventor 何军勇孔令涛张开胜谢超吴子健刘锦淮
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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