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Preparation method of attapulgite supported ferroferric oxide

A technology of triiron tetroxide and attapulgite, which is applied in the directions of oxidizing water/sewage treatment, etc., can solve the problems of secondary water pollution, etc., and achieve the effects of increasing adsorption capacity, simple preparation method and improving performance.

Inactive Publication Date: 2013-08-07
六安科瑞达新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional Fe 2+ Fenton's reagent composed of ions and hydrogen peroxide can generate a large number of hydroxyl radicals. Although the treatment effect is good for organic wastewater, it causes secondary pollution to water

Method used

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  • Preparation method of attapulgite supported ferroferric oxide
  • Preparation method of attapulgite supported ferroferric oxide
  • Preparation method of attapulgite supported ferroferric oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Attapulgite loaded Fe with a loading ratio of 2:1.13 3 o 4 preparation of

[0032] 1. Pass attapulgite clay (Guanshan attapulgite clay mine, Mingguang City, Anhui Province) through a 200-mesh sieve after crushing and grinding to obtain off-white powder for use;

[0033] 2. Introduce N into a 100 mL three-necked flask 2 After removing the air in the bottle, add 2g of prepared attapulgite powder, add 4.06g of FeSO 4 ·7H 2 O, add 30 mL of distilled water, heat and stir in a water bath at 60 °C for 20 min, so that the attapulgite can fully absorb Fe2+ ;

[0034] 3. Add 3 mL of hydrogen peroxide with a mass fraction of 10% dropwise, and continue to react for 10 min after the dropwise addition is completed;

[0035] 4. Add 1 mol / L NaOH solution dropwise into the three-necked flask until the pH of the reaction system is 12, and continue to react for 10 min;

[0036] 5. Transfer all the system in the three-necked flask to a polytetrafluoroethylene reactor, and ...

Embodiment 2

[0037] Example 2: Attapulgite loaded Fe with a loading ratio of 1:2 3 o 4 preparation of

[0038] 1. Pass attapulgite clay (Guanshan attapulgite clay mine, Mingguang City, Anhui Province) through a 200-mesh sieve after crushing and grinding to obtain off-white powder for use;

[0039] 2. Introduce N into a 100 mL three-necked flask 2 After removing the air in the bottle, add 1 g of prepared attapulgite powder, add 7.2 g of FeSO 4 ·7H 2 O, add 40 mL of distilled water, heat and stir in a water bath at 60 °C for 20 min, so that attapulgite can fully absorb Fe 2+ ;

[0040] 3. Add 1 mL of hydrogen peroxide with a mass fraction of 16.8% dropwise, and continue to react for 10 minutes after the dropwise addition is completed;

[0041] 4. Add 2 mol / L NaOH solution dropwise into the three-necked flask until the pH of the reaction system is 13, and continue to react for 10 min;

[0042] 5. Transfer all the system in the three-necked flask to a polytetrafluoroethylene reactor, an...

Embodiment 3

[0043] Example 3: Attapulgite loaded Fe 3 o 4 Catalytic Oxidative Degradation Performance of Methylene Blue.

[0044] In a 250 mL three-neck flask, add 100 mL of methylene blue solution with a concentration of 250 μmol / L, adjust its pH to 4, and add 0.1 g of attapulgite-loaded Fe 3 o 4 Catalyst (loading ratio 3:1), heated and stirred in a water bath at 60 °C. Add 1 mL of hydrogen peroxide with a mass fraction of 17% dropwise, react for 40 min, and detect the residual methylene blue concentration (the spectrophotometer uses a 10 mm cuvette to detect at 664 nm, and a working curve needs to be drawn for the detection). Two sets of comparative experiments were set up: one group only added catalyst without adding hydrogen peroxide, and one group only added hydrogen peroxide without catalyst. After a period of reaction, the residual amount of methylene blue in water (μmol / L) was as follows:

[0045]

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Abstract

The invention relates to a preparation method of attapulgite supported ferroferric oxide, which is used for increasing the specific surface area of a Fe3O4 catalyst and improving the adsorption capacity of the catalyst surface to obtain better catalytic performance. The method takes attapulgite as a carrier and FeSO4.7H2O as an iron source, and comprises the following steps of: putting the attapulgite and FeSO4.7H2O at a mass ratio of (1:15)-(5:1) into a three-neck flask, adding a certain amount of water, and stirring for certain time under nitrogen protection at 40-80 DEG C; dropwise adding hydrogen peroxide with certain concentration according to a molar ratio of H2O2 to Fe<2+> of 1:3; adding a NaOH solution until pH is 10-13; transferring to a closed polytetrafluoroethylene reaction kettle; and settling for 8-16 hours at 120-200 DEG C. According to the method provided by the invention, the synthesized supported Fe3O4 has the advantages of simple method, low cost and large specific surface area, can form a Fenton's reagent with hydrogen peroxide, can effectively catalyze, oxidize and degrade organic wastewater to prevent secondary pollution, and is favorable for recovering and circularly utilizing the catalyst.

Description

Technical field: [0001] The invention relates to a loaded Fe 3 o 4 A preparation method, in particular to a preparation method of attapulgite-loaded ferric oxide. Background technique: [0002] Attapulgite (ATP), also known as palygorskite or palygorskite, is a layered chain structure of water-containing magnesium-rich aluminum silicate clay minerals, which has unique dispersion, high temperature resistance, and good salt and alkali resistance. Excellent colloidal properties and high adsorption and decolorization ability. Due to the internal porous channels, the specific surface area is large, usually 146-210 m 2 / g, up to 500 m 2 Above / g, most of the cations, water molecules and polar organic molecules of a certain size can be directly adsorbed into the pores. Due to the structural properties of attapulgite, it is determined that it is a very good catalyst carrier. [0003] Traditional Fe 2+ The Fenton's reagent composed of ions and hydrogen peroxide can generate a ...

Claims

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Application Information

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IPC IPC(8): B01J23/745C02F1/72
Inventor 鲍远志柴多里翁世兵焦庆周
Owner 六安科瑞达新型材料有限公司
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