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3D catalyst for catalytic degradation of organic pollutants as well as preparation and application of 3D catalyst

A technology for the catalytic degradation of organic pollutants, applied in the field of biocatalysts, can solve the problems of large corrosion of 3D catalysts, easy loss of supported ions, and excessive performance degradation, so as to improve the loading effect, enrich active groups, and improve catalytic degradation. effect of effect

Active Publication Date: 2020-07-14
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the technical problems of easy loss of supported ions in existing organic pollutant catalysts, poor catalytic degradation performance, and difficult recovery, the first purpose of the present invention is to provide a method for preparing a 3D catalyst for catalytic degradation of organic pollutants, Aim to prepare a 3D catalyst with a three-dimensional structure, good loading of catalytic metal ions and excellent catalytic performance
[0011] The third purpose of the present invention is to provide the application of the 3D catalyst in catalyzing the degradation of organic pollutants, aiming to solve the technical problems of large erosion of the 3D catalyst and too fast performance decline after the first catalysis

Method used

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  • 3D catalyst for catalytic degradation of organic pollutants as well as preparation and application of 3D catalyst
  • 3D catalyst for catalytic degradation of organic pollutants as well as preparation and application of 3D catalyst
  • 3D catalyst for catalytic degradation of organic pollutants as well as preparation and application of 3D catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Cotton crop stalk (cotton stalk) is dried at 80 ℃, pulverizes, screens out 200 mesh particles with sieve, is 1g:10ml solid-liquid ratio according to solid-liquid ratio 5g biomass and 50ml 50% citric acid solution are added to Then add 5% (based on biomass weight) Co(NO 3 ) 2 or CoCl 2 After stirring evenly, let it stand for 20mins to carry out structural penetration. Put the open reaction vessel into an oven and burn it at 200°C for 3h. Use distilled water to ultrasonically wash away impurities for about 20mins. Distilled water is filtered and washed until neutral, and then dried. After adding pesticides to the prepared product, mix and shake with PMS or PDS, and finally measure the degradation rate of pesticides, which is recorded as sample 1;

[0085]The 3DSEM image of sample 1 biochar is shown in 4, showing an amorphous structure. front view see figure 1 ; top view see figure 2 .

Embodiment 2

[0087] Compared with Example 1, the difference is that phosphoric acid is used to replace citric acid, specifically as follows:

[0088] Dry the cotton crop stalks at 80°C, crush them, and screen out 200-mesh particles with a sieve, and add 5g of biomass and 50ml of 50% phosphoric acid solution to the open reaction vessel according to the solid-to-liquid ratio of 1g:10ml Add 5% (based on biomass weight) Co(NO 3 ) 2 or CoCl 2 Solution, stir evenly, let it stand for 20mins to carry out structure penetration, put the reaction vessel in an oven and burn it at 200°C for 3h, use distilled water to ultrasonically wash away impurities for about 20mins, filter and wash with distilled water until it is neutral, and then dry it to obtain the product. Add pesticides After mixing and shaking with PMS or PDS, the final pesticide

[0089] Degradation rate, recorded as sample two;

[0090] Sample 2 biochar 3D image see Figure 5 . The carbon material has a granular amorphous structure. ...

Embodiment 3

[0092] Compared with Example 2, the difference is that 85% phosphoric acid is used to replace 50% phosphoric acid, specifically as follows:

[0093] Dry the cotton crop stalks at 80°C, crush them, and screen out 200-mesh particles with a sieve. Add 5g of biomass and 50ml of 85% phosphoric acid solution to the open reaction vessel according to the solid-to-liquid ratio of 1g:10ml. Add 5% (based on biomass weight) Co(NO 3 ) 2 or CoCl 2 Solution, stir evenly, let it stand for 20mins to carry out structure penetration, put the reaction vessel in an oven and burn it at 200°C for 3h, use distilled water to ultrasonically wash away impurities for about 20mins, filter and wash with distilled water until it is neutral, and then dry it to obtain the product. Add pesticides After mixing and shaking with PMS or PDS, the final degradation rate of the pesticide is recorded as sample three;

[0094] See 6 for the SEM image of sample three biochar. The carbon material has a granular amorp...

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Abstract

The invention belongs to the field of organic wastewater treatment, and particularly discloses a method for preparing a 3D catalyst for catalytic degradation of organic pollutants, which comprises thefollowing steps: reacting a raw material solution containing cotton stalk powder, acid and a catalytic metal source in an oxygen-containing atmosphere at 100-350 DEG C to obtain the 3D catalyst, wherein in the raw material solution, the concentration of the acid is 35-85%. In the reaction process, a certain amount of non-ionic cellulose mixed ether is added, the structural stability of the 3D catalyst can be further improved, the loading effect of a catalytic metal source can be further improved, and the pesticide catalytic effect is further improved.

Description

Technical field: [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a three-dimensional biocatalyst capable of catalyzing the degradation of organic pollutants in water bodies. Background technique: [0002] As a large agricultural country, my country needs hundreds of billions of jins of grain to feed 1.4 billion people every year. Rice, as a large-scale food product grown in my country, is accompanied by the use of a large number of herbicides containing quinclorac every year, and this type of herbicide has a complex structure. , difficult to degrade, and has the characteristics of residual period. Scientific research shows that the long-term accumulation and retention of residual quinclorac acid in rice, fruits and vegetables in the human body will cause chronic poisoning, pose a potential threat to human health, and even induce many chronic diseases. It promotes canceration of cells in various tissues of the body, and long-term ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C02F1/72C02F101/30C02F101/36
CPCB01J23/75C02F1/725C02F1/722C02F2101/306C02F2101/36Y02W10/37
Inventor 周南吴江洪周智钟美娥
Owner HUNAN AGRICULTURAL UNIV
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