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Cobaltosic oxide ozone catalyst for degrading refractory pharmaceutical wastewater and application

A technology for tricobalt tetroxide and pharmaceutical wastewater, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, catalyst activation/preparation, etc. It can solve the problem of secondary pollution of catalysts that are difficult to recycle and achieve excellent results Catalytic activity, good removal rate, and good stability

Pending Publication Date: 2021-11-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The homogeneous catalytic ozonation in the current catalytic ozonation technology has the limitations of difficult catalyst recycling and secondary pollution.

Method used

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  • Cobaltosic oxide ozone catalyst for degrading refractory pharmaceutical wastewater and application
  • Cobaltosic oxide ozone catalyst for degrading refractory pharmaceutical wastewater and application
  • Cobaltosic oxide ozone catalyst for degrading refractory pharmaceutical wastewater and application

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The invention provides a kind of tricobalt tetroxide ozone catalyst Fe 3 o 4 @SiO 2 @Co 3 o 4 The preparation method specifically comprises the following steps:

[0024] (1) 10.1gKNO 3 and 5.6g KOH were dissolved in 400mL of deoxygenated deionized water, and 100mL of 0.2mol / L FeSO 4 solution, accompanied by nitrogen protection. After 4 hours of stirring, the black precipitate was separated by centrifugation and washed three times with ethanol and deionized water respectively, the centrifugal speed was 8000rpm / min, and the time was 5min. It was dried in a vacuum oven at 60°C for 24h, ground and sieved to obtain Fe 3 o 4 particles.

[0025] (2) first the 1g nano-Fe obtained in step (1) 3 o 4The particles were added to 50 mL of 0.5 mol / L trisodium citrate dihydrate solution, and dispersed uniformly in the solution by ultrasound. Then, it was stirred for 6 hours in a water bath at 60° C. under nitrogen protection. The obtained black powder was separated by cent...

Embodiment 2

[0035] The invention provides a kind of tricobalt tetroxide ozone catalyst Fe 3 o 4 @SiO 2 @Co 3 o 4 The preparation method specifically comprises the following steps:

[0036] (1) 10.1gKNO 3 and 5.6g KOH were dissolved in 400mL of deoxygenated deionized water, and 100mL of 0.2mol / L FeSO 4 solution, accompanied by nitrogen protection. After 4 hours of stirring, the black precipitate was separated by centrifugation and washed three times with ethanol and deionized water respectively, the centrifugal speed was 8000rpm / min, and the time was 5min. It was dried in a vacuum oven at 70°C for 36h, ground and sieved to obtain Fe 3 o 4 particles.

[0037] (2) first the 1g nano-Fe obtained in step (1) 3 o 4 The particles were added to 50 mL of 0.5 mol / L trisodium citrate dihydrate solution, and dispersed uniformly in the solution by ultrasound. Then, it was stirred for 6 hours in a water bath at 60° C. under nitrogen protection. The obtained black powder was separated by cen...

Embodiment 3

[0046] The invention provides a kind of tricobalt tetroxide ozone catalyst Fe 3 o 4 @SiO 2 @Co 3 o 4 The preparation method specifically comprises the following steps:

[0047] (1) 10.1gKNO 3 and 5.6g KOH were dissolved in 400mL of deoxygenated deionized water, and 100mL of 0.2mol / L FeSO 4 solution, accompanied by nitrogen protection. After 4 hours of stirring, the black precipitate was separated by centrifugation and washed three times with ethanol and deionized water respectively, the centrifugal speed was 8000rpm / min, and the time was 5min. It was dried in a vacuum oven at 80°C for 48h, ground and sieved to obtain Fe 3 o 4 particles.

[0048] (2) first the 1g nano-Fe obtained in step (1) 3 o 4 The particles were added to 50 mL of 0.5 mol / L trisodium citrate dihydrate solution, and dispersed uniformly in the solution by ultrasound. Then, it was stirred for 6 hours in a water bath at 60° C. under nitrogen protection. The obtained black powder was separated by cen...

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Abstract

The invention discloses a cobaltosic oxide ozone catalyst for degrading refractory pharmaceutical wastewater and application, and belongs to the technical field of catalytic ozonation and wastewater treatment. According to the cobaltosic oxide ozone catalyst, a catalyst precursor is synthesized through a chemical precipitation method, and the catalyst is obtained through high-temperature calcination. The catalyst prepared by the invention has the characteristics of larger specific surface area, better crystal structure and the like. The catalyst has a high removal rate on refractory pharmaceutical wastewater pollutants and COD in a catalytic ozonation system, is high in stability, can be repeatedly used for multiple times without influencing the catalytic activity, and has a certain application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalytic ozonation and waste water treatment, and in particular relates to a tricobalt tetroxide ozone catalyst capable of effectively degrading refractory pharmaceutical waste water and its application. Background technique [0002] Today, medicines have become an essential item for human life and travel, and their effects on restoring health are well known. However, a series of high-concentration pharmaceutical wastewater discharged by industries such as medicine has increasingly become an important source of environmental pollution. Pharmaceutical wastewater contains a large amount of refractory organics (carboxylic acids, aromatic organics, nitro compounds, etc.), toxic substances and teratogenic, carcinogenic and mutagenic organics. During the preparation of drugs, organic and inorganic raw materials need to be added. Many of these raw materials are biologically toxic, difficult to be degraded by m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J37/03B01J37/08B01J35/10C02F1/72C02F1/78C02F101/30C02F101/34C02F101/38C02F103/34
CPCB01J23/75B01J37/031B01J37/08B01J23/002C02F1/78C02F1/725C02F2101/30C02F2101/34C02F2101/38C02F2103/343C02F2209/08B01J2523/00B01J35/23B01J35/61B01J2523/41B01J2523/842B01J2523/845
Inventor 戴启洲熊盼
Owner ZHEJIANG UNIV OF TECH
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