A kind of method for preparing heterogeneous Fenton catalyst by pyrolysis of red soil

A catalyst and red soil technology, applied in the field of catalysis, can solve the problems that red soil is not easy to cultivate, the cost of heterogeneous Fenton catalyst is high, and the active component iron is easy to dissolve.

Active Publication Date: 2022-07-01
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems that red soil is difficult to cultivate, the cost of heterogeneous Fenton catalyst is high, and the active component iron is easy to dissolve, the present invention provides a method for preparing heterogeneous Fenton catalyst by pyrolysis of red soil

Method used

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  • A kind of method for preparing heterogeneous Fenton catalyst by pyrolysis of red soil
  • A kind of method for preparing heterogeneous Fenton catalyst by pyrolysis of red soil
  • A kind of method for preparing heterogeneous Fenton catalyst by pyrolysis of red soil

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Experimental program
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Effect test

Embodiment 1

[0039] A heterogeneous Fenton catalyst prepared by pyrolysis of red soil is prepared by the following method:

[0040] (1) Air-dry the red soil for 7 days, grind it through an 80-mesh sieve, pretreat it with anhydrous ethanol, rinse it with ultrapure water until the conductivity of the eluent is stable, and remove the pretreated red soil by vacuum filtration moisture, and then placed in an oven at 120°C and dried for 24h;

[0041] (2) Add 4% safflower powder by mass to the dried red soil as a binder, then add phosphoric acid with a mass concentration of 52% for mixing, and the dosage of the phosphoric acid solution is 0.6% of the mass of the dried red soil. , and then use the extruder molding equipment (SET-100) to make a cylindrical mixture, and the obtained cylindrical mixture has a diameter of 1.5 to 2 mm and a length of 2 to 3 mm;

[0042] (3) The cylindrical mixture was placed at room temperature for 24 hours, then placed in an oven with a temperature of 150 ° C for dryi...

Embodiment 2

[0050] A heterogeneous Fenton catalyst prepared by pyrolysis of red soil is prepared by the following method:

[0051] (1) Air-dry the red soil for 7 days, grind it through an 80-mesh sieve, pretreat it with anhydrous ethanol, rinse it with ultrapure water until the conductivity of the eluent is stable, and remove the pretreated red soil by vacuum filtration moisture, and then placed in an oven at 130 ° C to dry for 15 hours;

[0052] (2) Add 5% by mass of Asparagus powder to the dry red soil as a binder, and then add phosphoric acid with a mass concentration of 53% for mixing, and the dosage of the phosphoric acid solution is 0.5% of the dry red soil mass. , and then use the extruder molding equipment (SET-100) to make a cylindrical mixture, and the obtained cylindrical mixture has a diameter of 1.5 to 2 mm and a length of 2 to 3 mm;

[0053] (3) The cylindrical mixture was placed at room temperature for 18 hours, then placed in an oven with a temperature of 130 ° C for dryi...

Embodiment 3

[0059] A heterogeneous Fenton catalyst prepared by pyrolysis of red soil is prepared by the following method:

[0060] (1) Air-dry the red soil for 7 days, grind it through an 80-mesh sieve, pretreat it with anhydrous ethanol, rinse it with ultrapure water until the conductivity of the eluent is stable, and remove the pretreated red soil by vacuum filtration moisture, and then placed in an oven at 120°C and dried for 24h;

[0061] (2) Add 3% by mass of Asparagus powder to the dry red soil as a binder, and then add phosphoric acid with a mass concentration of 54% for mixing, and the dosage of the phosphoric acid solution is 0.8% of the dry red soil mass. , and then use the extruder molding equipment (SET-100) to make a cylindrical mixture, and the obtained cylindrical mixture has a diameter of 1.5 to 2 mm and a length of 2 to 3 mm;

[0062] (3) The cylindrical mixture was placed at room temperature for 24 hours, then placed in an oven with a temperature of 140 ° C for drying f...

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Abstract

The invention belongs to the technical field of catalysis, and in particular relates to a method for preparing a heterogeneous Fenton catalyst by pyrolysis of red soil. Aiming at the problems such as difficult cultivation of red soil, high cost of heterogeneous Fenton catalyst, and easy dissolution of active component iron, the preparation method of the invention Using red soil as raw material, a new type of heterogeneous Fenton catalyst with high catalytic performance and stability is prepared through alcohol washing, water washing, extrusion molding, pre-oxidation and carbonization, and phosphoric acid modification, etc., which can promote the effective decomposition of hydrogen peroxide. , produce sufficient hydroxyl radicals, and treat refractory organic wastewater such as antibiotics, which has good environmental and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and particularly relates to a method for preparing a heterogeneous Fenton catalyst by pyrolysis of red soil. Background technique [0002] Antibiotics are chemicals produced by the metabolism of microorganisms that can kill other microorganisms. Due to the inhibitory effect of antibiotics on pathogenic microorganisms, it is widely used in medical, animal husbandry and aquaculture industries. Hospital wastewater is discharged after being treated by sewage treatment plants or sewage treatment stations. Since the main process of most sewage treatment plants is biochemical treatment, the removal of antibiotics is weak, and antibiotics can still be detected in the treated wastewater. The aquaculture industry uses a large amount of antibiotics on fish. Some of these antibiotics are eaten by the fish and enter the water body with excrement, while the part that is not eaten by the fish directly enters...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J23/78B01J35/10C02F1/72C02F101/38
CPCB01J27/1853B01J23/78C02F1/722C02F1/725C02F2305/026C02F2101/38C02F2209/08C02F2209/20B01J35/638B01J35/647B01J35/615
Inventor 余丽曹昉卫皇曌荣欣赵颖刘允康
Owner TAIYUAN UNIV OF TECH
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