Preparation method of attapulgite/zirconia composite defluorinating material

A technology of zirconia and fluorine materials, 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 pH changes. Sensitivity and other issues, to achieve the effects of excellent ion exchange performance, fast adsorption rate and high adsorption capacity

Inactive Publication Date: 2011-11-23
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 pr...

Method used

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  • Preparation method of attapulgite/zirconia composite defluorinating material
  • 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 0.4mol / L NaOH solution for later use; Weigh 13.3g of Al 2 (SO 4 ) 3 ·18H 2 O, add deionized water to make 0.05mol / L Al 2 (SO 4 ) 3 The solution is ready for use; according to the mass ratio of 3:6, weigh 3g of ZrO(NO 3 ) 2 ·2H 2 O and 6g of sodiumized attapulgite for later use; 3g of ZrO(NO 3 ) 2 ·2H 2 O was added to a beaker containing 200 mL of deionized water, after ultrasonic dispersion for 10 minutes, aging at a constant temperature of 60°C for 12 hours, and then standing at room temperature for 15 hours to obtain ZrO(NO 3 ) 2 Solution, set aside.

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

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

Embodiment 2

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

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

[0038] 3) The ZrO(NO 3 ) 2 After the solution was added dropwise to the attapulgite suspension, stirring was continued for 2 hours, and then the pH was adjusted to 5...

Embodiment 3

[0042] 1) Selection of raw materials: Weigh 16g of NaOH, add deionized water, and prepare 0.4mol / L NaOH solution for later use; Weigh 13.3g of Al 2 (SO 4 ) 3 ·18H 2 O, add deionized water to make 0.05mol / L Al 2 (SO 4 ) 3 The solution is ready for use; according to the mass ratio of 3:6, weigh 3g of ZrO(NO 3 ) 2 ·2H 2 O and 6g of sodiumized attapulgite for later use; 3g of ZrO(NO 3 ) 2 ·2H 2 O was added to a beaker containing 200 mL of deionized water, ultrasonically dispersed for 10 minutes, then aged for 12 hours at a constant temperature of 65 ℃, and then allowed to stand at room temperature for 15 hours to obtain ZrO(NO 3 ) 2 Solution, set aside.

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

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

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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 fluoride removal material. Background technique [0002] Fluorine is one of the essential trace elements of the human body. A proper amount of fluorine is essential to maintain the development of bones and teeth. However, long-term drinking of high-fluoride water can cause dental fluorosis. In severe cases, it can even cause bone deformation, pain, joint stiffness, and muscles The key is calcified, walking is difficult, and it is paralyzed. In recent years, due to the development of modern industry and agriculture, the application of fluorine and fluorine-containing compounds has become increasingly widespread, and the amount of fluorine entering the environment has also increased. People have paid more attention to the research of fluorosis. Fluorine pollution is mainly produced in ind...

Claims

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Application Information

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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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