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Magnetic Fenton catalyst as well as preparation method and application thereof

A catalyst, Fenton's technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor ability to reduce ferric iron, generation of iron sludge and inconvenient recycling

Active Publication Date: 2021-08-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problems of poor ability to reduce ferric iron in situ, generate iron sludge and inconvenient recovery of existing Fenton catalysts, and provide a magnetic Fenton catalyst and its preparation method and application

Method used

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  • Magnetic Fenton catalyst as well as preparation method and application thereof
  • Magnetic Fenton catalyst as well as preparation method and application thereof
  • Magnetic Fenton catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: the preparation method of the magnetic Fenton catalyst of the present embodiment, carry out according to the following steps:

[0033] 1. Dissolve 10g of tourmaline and 8g of NaOH in 200mL of ultrapure water, and the flow rate is 600mL min -1 Nitrogen, and the ventilation time is 30min to obtain the mixed solution Ⅰ;

[0034] 2. Add a few drops of concentrated sulfuric acid to 100mL of ultrapure water to make the pH 1, then add 0.25mol of ferrous sulfate and 0.25mol of ferric sulfate in sequence to obtain the acidic mixture II;

[0035] 3. When the nitrogen flow rate is 600mL min -1 Under the condition of -1 Add it dropwise to the mixed solution I at a speed of 300 rpm, and then centrifuge at a speed of 7000 rpm for 3 min to obtain a solid phase;

[0036] 4. Dry the solid phase at 60°C under vacuum for 24 hours, and then grind for 30 minutes to obtain a magnetic Fenton catalyst, which is a surface-loaded Fe 3 o 4 Tourmaline.

[0037] The scanning ele...

Embodiment 2

[0041] Embodiment 2: the preparation method of the magnetic Fenton catalyst of the present embodiment, carry out according to the following steps:

[0042] 1. Dissolve 5g of tourmaline and 6g of NaOH in 200mL of ultrapure water, and the flow rate is 400mL min -1 Nitrogen, and the ventilation time is 30min to obtain the mixed solution Ⅰ;

[0043] 2. Add a few drops of concentrated sulfuric acid to 100mL of ultrapure water to make the pH 1.5, then add 0.15mol of ferrous sulfate and 0.15mol of ferric sulfate in sequence to obtain the acidic mixture II;

[0044] 3. When the nitrogen flow rate is 400mL min -1 Under the condition of -1 Add it dropwise to the mixed solution I at a speed of 500 rpm, and then continue to stir at 300 rpm for 25 minutes after the dropwise addition, and then centrifuge at 5000 rpm for 5 minutes to obtain a solid phase;

[0045] 4. Dry the solid phase at 80°C under vacuum for 12 hours, and then grind for 30 minutes to obtain a magnetic Fenton catalyst, ...

Embodiment 3

[0049] Embodiment 3: the preparation method of the magnetic Fenton catalyst of the present embodiment, carry out according to the following steps:

[0050] 1. Dissolve 15g of tourmaline and 10g of NaOH in 200mL of ultrapure water, and the flow rate is 1000mL min -1 Nitrogen, and the ventilation time is 30min to obtain the mixed solution Ⅰ;

[0051] 2. Add a few drops of concentrated sulfuric acid to 100mL of ultrapure water to make the pH 2, then add 0.45mol of ferrous sulfate and 0.45mol of ferric sulfate in sequence to obtain the acidic mixture II;

[0052] 3. When the nitrogen flow rate is 1000mL min -1 Under the condition of -1 Add it dropwise to the mixed solution I at a speed of 400 rpm, and then centrifuge at 6000 rpm for 4 min to obtain a solid phase;

[0053] 4. Dry the solid phase at 70°C under vacuum for 24 hours, and then grind for 30 minutes to obtain a magnetic Fenton catalyst, which is a surface-loaded Fe 3 o 4 Tourmaline.

[0054] The scanning electron mi...

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Abstract

The invention discloses a magnetic Fenton catalyst as well as a preparation method and application thereof, relates to a Fenton catalyst as well as a preparation method and application thereof, and aims to solve the technical problems that the existing Fenton catalyst is poor in capability of reducing ferric iron in situ and is inconvenient to generate iron mud and recycle. The magnetic Fenton catalyst disclosed by the invention is tourmaline of which the surface is loaded with Fe3O4. The preparation method comprises the following steps: under a nitrogen introduction condition, dropwise adding an acidic aqueous solution of ferrous sulfate and ferric sulfate into an alkaline solution of tourmaline, stirring the solution, and then carrying out centrifugal separation, and drying and grinding the material to obtain the magnetic Fenton catalyst. The additive can be used for treating sulfathiazole wastewater in a Fenton system, and the removal rate of sulfathiazole can reach 90% or above after the additive is treated for 30 min. The magnetic Fenton catalyst can be used in the field of water treatment.

Description

technical field [0001] The invention relates to a Fenton catalyst, a preparation method and application thereof, and belongs to the field of magnetic Fenton catalysts. Background technique [0002] As a kind of advanced oxidation technology, Fenton is often used to treat wastewater containing refractory biodegradation because it can generate strong oxidizing free radicals (·OH). The traditional homogeneous Fenton is H 2 o 2 in Fe 2+ Under the catalysis of OH, it has the problem of easily forming iron sludge. Therefore, in recent years, researchers have prepared some iron-containing catalysts to make the catalyst release iron slowly and reduce the generation of iron sludge. Among them, Fe 3 o 4 Due to its strong magnetism, it can be attracted by magnets, making it easy to recycle. In 2017, Han Chengliang and others published the invention patent "A kind of particle size controllable Fe 3 o 4 Preparation method of nanopowder and its application in oil-water separation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J37/03B01J37/08C02F1/72C02F101/38C02F101/34
CPCB01J23/745B01J37/035B01J37/082C02F1/725C02F2305/026C02F2101/34C02F2101/38C02F2101/40B01J35/33Y02W10/37
Inventor 邱珊朱英实邓凤霞马放郑砚石张珈瑜荆宝剑
Owner HARBIN INST OF TECH
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