Iron-sulfur coupled catalyst capable of efficiently degrading high-concentration phenol, and preparation method and application of catalyst

A catalyst, high-concentration technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of low degradation efficiency of organic pollutants, low efficiency of Fenton degradation of pollutants, and iron ion dissolution rate. Low problems, to achieve the effect of easier control of the operation process, low cost, and reduced process cost

Active Publication Date: 2019-11-08
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And in such techniques, Fe 2+ Easily consumed and mostly converted to Fe with negligible effect on the Fenton system 3+ , which is a waste of resources from a certain point of view, and its Fenton degradation efficiency of pollutants is low
[0003] Goethite is an iron (hydr) oxide mineral that is abundant in the earth's crust. It can act as a catalyst to effectively degrade organic pollutants in the Fenton reaction process system. Because the iron ion dissolution rate of goethite is low, it can be Reduce the output of sludge, but many studies have shown that the degradation efficiency of organic pollutants in the Fenton process system involving goethite and other iron oxides is low

Method used

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  • Iron-sulfur coupled catalyst capable of efficiently degrading high-concentration phenol, and preparation method and application of catalyst
  • Iron-sulfur coupled catalyst capable of efficiently degrading high-concentration phenol, and preparation method and application of catalyst
  • Iron-sulfur coupled catalyst capable of efficiently degrading high-concentration phenol, and preparation method and application of catalyst

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Experimental program
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Effect test

Embodiment 1

[0032] A preparation method of an iron-sulfur coupling catalyst capable of efficiently degrading high-concentration phenol:

[0033] 1) Synthetic goethite;

[0034] 2) Put ferrous sulfate (40~48%) into a 150 mL conical flask, then use a graduated cylinder to measure deionized water (30~50 mL) and add it to the conical flask. Use a magnetic stirrer to stir until the ferrous sulfate is completely dissolved;

[0035] 3) Add goethite (amount of 23~28%), continue to feed nitrogen and continue magnetic stirring for 10-60 min, so that the ferrous sulfate solution and goethite are evenly mixed;

[0036] 4) Add sodium sulfide (25-30%) solution, continue to pass nitrogen and continue magnetic stirring for 1 h, then centrifuge to remove the supernatant to obtain a solid, freeze-dry at -48°C for 48 h in a vacuum freeze-dryer to obtain Iron-sulfur coupling catalyst, referred to as GS material.

Embodiment 2

[0038] A preparation method of an iron-sulfur coupling catalyst capable of efficiently degrading high-concentration phenol:

[0039] 1) Synthetic goethite;

[0040] 2) Put ferrous chloride (30-40%) into a 150 mL conical flask, then use a graduated cylinder to measure deionized water (30-50 mL) and add it to the conical flask. Simultaneously use magnetic stirrer to stir until ferrous chloride is completely dissolved;

[0041] 3) Add goethite (amount of 23-28%), continue to feed nitrogen and continue magnetic stirring for 10-60 min, so that the ferrous chloride solution and goethite are evenly mixed;

[0042] 4) Add potassium sulfide solution (amount of 35-40%), continue to flow nitrogen and continue magnetic stirring for 1 h, then centrifuge to remove the supernatant to obtain a solid, freeze-dry at -48°C for 48 h in a vacuum freeze-dryer, and obtain Iron-sulfur coupling catalyst, referred to as GS material.

Embodiment 3

[0044] Preparation of goethite:

[0045] Weigh 50.0 g of Fe(NO 3 ) 3 9H 2 O put it in a 1000 mL plastic container and dilute it to 500 mL with deionized water, then weigh 20 g of NaOH, dissolve and dilute it with 100 mL of deionized water to make a working solution of 5 moL / L, and then add the solution containing Fe dropwise (NO 3 ) 3 9H 2 In a plastic container of O, adjust the pH of the mixed solution to about 12, seal the obtained thick suspension with a plastic wrap, and age it in a constant temperature oven at 70°C for 60 h, the reddish-brown flocculent iron-containing precipitate becomes Small brown particles were washed repeatedly with distilled water until neutral, and the viscous solid obtained after centrifuging to remove the supernatant was vacuum-dried at 60°C for 48 hours to obtain goethite.

[0046] The steps of the method for degrading phenol are as follows: Take the prepared phenol solution (100-1000 mg / L) and add GS material (0.1-0.5 g / L), blow in nitrog...

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Abstract

The invention belongs to the technical field of catalytic materials, and particularly relates to an iron-sulfur coupled catalyst capable of efficiently degrading high-concentration phenol, and a preparation method and application of the catalyst. The preparation method of the catalyst comprises the following steps: 1) preparing goethite; 2) mixing an iron-source material with deionized water, introducing nitrogen and carrying out stirring until the iron-source material is dissolved; 3) adding the goethite prepared in the step 1), continuously introducing nitrogen, and continuously carrying outstirring; and 4) adding a sulfide solution, continuously introducing nitrogen and continuously carrying out stirring, then carrying out centrifuging to remove the supernatant to obtain a solid, and carrying out vacuum freeze drying on the solid to obtain the iron-sulfur coupled catalyst. The catalyst can improve performance of a Fenton process system for treating organic pollutants and improve degradation efficiency on the organic pollutants. High-efficiency phenol degradation can be realized in a neutral or acidic environment, and cost of phenol treatment can be reduced. The novel high-efficiency Fenton reaction process system provided by the invention has an important application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to an iron-sulfur coupling catalyst capable of efficiently degrading high-concentration phenol and its preparation method and application. Background technique [0002] The reaction formula of the traditional Fenton technique is Fe 2+ +H 2 o 2 → Fe 3+ +OH - + OH, mainly relying on Fe 2+ React with a certain amount of hydrogen peroxide to produce strong oxidizing hydroxyl radicals to treat organic pollutants in water. And in such techniques, Fe 2+ Easily consumed and mostly converted to Fe with negligible effect on the Fenton system 3+ , from a certain point of view is a waste of resources, and its Fenton degradation efficiency of pollutants is low. [0003] Goethite is an iron (hydr) oxide mineral that is abundant in the earth's crust. It can act as a catalyst to effectively degrade organic pollutants in the Fenton reaction process system. Because the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043C02F1/72C02F101/34
CPCB01J27/043C02F1/722C02F2101/345
Inventor 张鹏吴宏海卢鹏澄
Owner SOUTH CHINA NORMAL UNIVERSITY
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