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Preparation method of attapulgite/zirconia composite defluorinating material

A zirconia and fluorine material technology, applied in chemical instruments and methods, other chemical processes, adsorbed water/sewage treatment, etc., can solve the problem of attapulgite-based defluorination adsorbents with small adsorption capacity, narrow water treatment range, and preparation technology. complex problems, to achieve the effects of excellent ion exchange performance, fast adsorption rate and simple process

Inactive Publication Date: 2013-04-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The attapulgite-based fluorine-removing adsorbents obtained by these methods either have small adsorption capacity, complicated preparation process, high cost, or secondary pollution, are unstable, are sensitive to pH changes, and have a narrow water treatment range. bring some difficulty

Method used

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  • Preparation method of attapulgite/zirconia composite defluorinating material
  • Preparation method of attapulgite/zirconia composite defluorinating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Selection of raw materials: Weigh 16g of NaOH, add deionized water, and prepare a 0.4mol / L NaOH solution for later use; weigh 13.3g of Al 2 (SO 4 ) 3 18H 2 O, add deionized water to prepare 0.05mol / L Al 2 (SO 4 ) 3 The solution is for subsequent use; according to the ratio of 3: 6 by mass ratio, take 3g of ZrO(NO 3 ) 2 2H 2 Attapulgite after O and 6g sodiumization, standby; The ZrO(NO of 3g 3 ) 2 2H 2 O was added to a beaker filled with 200mL deionized water, ultrasonically dispersed for 10min, aged at a constant temperature of 60°C for 12h, and then left at room temperature for 15h to obtain ZrO(NO 3 ) 2 solution, set aside.

[0027] 2) Weigh 6g of sodium-treated attapulgite, add deionized water to prepare a 5wt% suspension, stir vigorously at 60°C for 10 minutes, and obtain attapulgite suspension for later use.

[0028] 3) The ZrO(NO 3 ) 2 After the solution was added dropwise to the attapulgite suspension, the stirring was continued for 2 hours, and...

Embodiment 2

[0036] 1) Selection of raw materials: Weigh 16g of NaOH, add deionized water to prepare a 0.4mol / L NaOH solution for later use; weigh 13.3g of Al 2 (SO 4 ) 3 18H 2 O, add deionized water to prepare 0.05mol / L Al 2 (SO 4 ) 3 The solution is for subsequent use; according to the ratio of mass ratio 5: 6, take 5g of ZrO(NO 3 ) 2 2H 2 Attapulgite after O and 6g sodiumization, standby; The ZrO(NO of 5g 3 ) 2 2H 2 O was added to a beaker containing 200 mL of deionized water, ultrasonically dispersed for 10 min, aged at a constant temperature of 70 ° C for 12 h, and then left at room temperature for 15 h to obtain ZrO(NO 3 ) 2 solution, set aside.

[0037] 2) Add deionized water to 6 g of sodiumized attapulgite to prepare a 5 wt % suspension, and stir vigorously at 70° C. for 10 minutes to obtain attapulgite suspension for future use.

[0038] 3) The ZrO(NO 3 ) 2 After the solution was added dropwise to the attapulgite suspension, the stirring was continued for 2 hours, ...

Embodiment 3

[0042] 1) Selection of raw materials: Weigh 16g of NaOH, add deionized water, and prepare a 0.4mol / L NaOH solution for later use; weigh 13.3g of Al 2 (SO 4 ) 3 18H 2 O, add deionized water to prepare 0.05mol / L Al 2 (SO 4 ) 3 The solution is for subsequent use; according to the ratio of mass ratio 3: 6, take 3g of ZrO(NO 3 ) 2 2H 2 Attapulgite after O and 6g sodiumization, standby; The ZrO(NO of 3g 3 ) 2 2H 2 O was added to a beaker containing 200 mL of deionized water, ultrasonically dispersed for 10 min, aged at a constant temperature of 65 ° C for 12 h, and then left at room temperature for 15 h to obtain ZrO(NO 3 ) 2 solution, set aside.

[0043] 2) Add deionized water to 6 g of sodiumized attapulgite to prepare a 5 wt % suspension, and stir vigorously at 65° C. for 10 minutes to obtain attapulgite suspension for future use.

[0044] 3) The ZrO(NO 3 ) 2 After the solution was added dropwise to the above attapulgite suspension, the stirring was continued for 2...

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Abstract

The invention relates to a preparation method of an adsorbing material and a composite material, in particular to a preparation method of an attapulgite / zirconia composite defluorinating material. The preparation method is characterized by comprising the following steps of: (1) selecting raw materials: respectively weighing zircon salt and Na-activated attapulgite for later use according to the mass ratio of (3:6)-(5:6), and preparing the zircon salt into a zircon salt solution; (2) preparing the attapulgite into 5 percent by weight of suspensions, and stirring to obtain attapulgite suspensions; (3) dropwise adding the zircon salt solution to the attapulgite suspensions, stirring, then regulating the pH to 5.0-5.5 by using a NaOH solution, and ageing to obtain slurry; and (4) centrifugalizing the slurry, drying an obtained filter cake, soaking and activating an obtained dried material in an aluminum salt solution for more than 4 hours, washing with deionized water till no SO4<2-> exists, drying, and finely grinding to obtain the attapulgite / zirconia composite defluorinating material. The attapulgite / zirconia composite defluorinating material prepared with the method has the advantages of larger adsorption capacity, low cost and recyclability and can be used for the defluorination of underground water and industrial waste water.

Description

technical field [0001] The invention relates to a preparation method of an adsorption material and a composite material, in particular to a preparation method of an attapulgite / zirconia composite material for removing fluorine. Background technique [0002] Fluorine is one of the essential trace elements for the human body. A moderate amount of fluorine is essential to maintain the development of bones and teeth. However, drinking high-fluoride water for a long time can lead to dental fluorosis. In severe cases, it can even lead to bone deformation, pain, joint stiffness, tendon Calcification of the bonds, difficulty walking, and paralysis. In recent years, due to the development of modern industry and agriculture, the application of fluorine and fluorine-containing compounds has become more and more extensive, and the amount of fluorine entering the environment has also increased, and people have paid more attention to the research of fluorosis. Fluorine pollution is mainl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F101/14
Inventor 张高科贺志丽甘慧慧王一凡
Owner WUHAN UNIV OF TECH
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