A kind of magnetic porous iron-zirconium bimetal composite coagulation aid and its preparation method and application

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

Active Publication Date: 2022-04-08
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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  • A kind of magnetic porous iron-zirconium bimetal composite coagulation aid and its preparation method and application

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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 coagulation aid and its preparation method and application. Zirconium sulfate and iron sulfate are dispersed in pure water, the pH is adjusted to weak alkalinity, and glacial acetic acid is added under heating conditions for reaction. Finally, a hydrated iron / zirconium oxide colloidal solution is obtained, and the hydrated iron / zirconium oxide colloidal solution is reacted under a high-pressure and high-temperature atmosphere to obtain the target product. The synthesis process of the present invention is simple, and the surface of the prepared magnetic porous iron-zirconium bimetallic composite coagulant is rich in hydroxyl groups, sulfate radical active groups and metal ion active sites, and exists in the form of colloids in water bodies, which can simultaneously realize rapid It has two functions of adsorption and rapid coagulation aid. After adding a conventional flocculant, the colloidal state will immediately change into a floc state, and finally settle down to achieve rapid separation of water and mud without causing secondary pollution to the water body. After use, the magnetic porous iron-zirconium bimetallic composite coagulant aid is soaked Magnetic recovery, drying can be recycled.

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 Patents(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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