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High-efficiency catalyst for degrading water body COD (Chemical Oxygen Demand) by ozone and preparation method thereof

A technology for ozone degradation and catalysts, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, heterogeneous catalyst chemical elements, etc., can solve problems such as a large amount of waste gas, complex preparation process, and environmental pollution , to avoid pollution, improve stability and reduce metal loss

Active Publication Date: 2018-03-02
芜湖格丰环保科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are many ozone catalysts at present, most of the preparation processes are complicated, and the carrier materials selected are mostly modified activated carbon, industrial hydrotalcite, etc., and the metal salts selected are mostly nitrates, which will generate a lot of waste gas during the preparation process. , causing environmental pollution

Method used

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  • High-efficiency catalyst for degrading water body COD (Chemical Oxygen Demand) by ozone and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A kind of preparation method of the efficient catalyst of ozone degradation water body COD, comprises the following steps:

[0033] (1) The activated alumina ball carrier is roasted in a gas-fired mesh belt kiln at 350°C for 4 hours, and then stored in a silo for later use after cooling down to room temperature;

[0034] (2) Take by weight 15 parts of ferric chloride hexahydrate, 1 part of cerium chloride heptahydrate, and 1 part of citric acid, add in the mixing tank and mix and stir, and add 40 parts of water to make it dissolve completely, weigh 90 parts of activated alumina balls are transported to the mixing tank and mixed with the above mixed solution for 10 minutes;

[0035] (3) Pump 40 parts of 0.1mol / L sodium hydroxide solution into the mixing tank of step (2), and stir for 20 minutes;

[0036] (4) Open the bottom valve of the mixing tank, and centrifuge the solid-liquid mixture after the reaction in step (3) in a flat bag centrifuge to remove the remaining li...

Embodiment 2

[0040] A kind of preparation method of the efficient catalyst of ozone degradation water body COD, comprises the following steps:

[0041] (1) The activated alumina ball carrier is roasted in a gas-fired mesh belt kiln at 350°C for 4 hours, and then stored in a silo for later use after cooling down to room temperature;

[0042] (2) Take by weight 25 parts of ferric chloride hexahydrate, 3 parts of cerium chloride heptahydrate, and 3 parts of citric acid, add in mixing tank and mix and stir, and add 50 parts of water to make it dissolve completely, weigh 90 parts of activated alumina balls are transported to the mixing tank and mixed with the above mixed solution for 20 minutes;

[0043] (3) Pump 50 parts of 0.5mol / L sodium carbonate solution into the mixing tank of step (2), and stir for 20 minutes;

[0044] (4) Open the bottom valve of the mixing tank, and centrifuge the solid-liquid mixture after the reaction in step (3) in a flat bag centrifuge to remove the remaining liquid...

Embodiment 3

[0048] A kind of preparation method of the efficient catalyst of ozone degradation water body COD comprises the following steps:

[0049] (1) The activated alumina ball carrier is roasted in a gas-fired mesh belt kiln at 450°C for 2 hours, and then stored in a silo for later use after cooling down to room temperature;

[0050] (2) Weigh 45 parts of ferrous sulfate heptahydrate, 6 parts of cerium sulfate tetrahydrate, and 5 parts of polyvinylpyrrolidone by weight, add 50 parts of water to dissolve it completely, and weigh 85 parts of activated alumina balls are transported to the mixing tank and mixed with the above mixed solution for 20 minutes;

[0051] (3) Pump 40 parts of 0.5mol / L sodium carbonate solution into the mixing tank of step (2), and stir for 20 minutes;

[0052] (4) Open the bottom valve of the mixing tank, and centrifuge the solid-liquid mixture after the reaction in step (3) in a flat bag centrifuge to remove the remaining liquid. After the remaining liquid is...

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Abstract

The invention discloses a high-efficiency catalyst for degrading water body COD (Chemical Oxygen Demand) by ozone and a preparation method thereof. The catalyst is prepared from active alumina ball carriers and iron and cerium compound oxide active ingredients, wherein the active alumina ball is taken as the carrier, the carrier is prepared through roasting pretreatment, ferric salt and cerium salt dipping, alkali treatment, centrifugal washing, drying and calcination. Under a condition that ozone concentration is 20mg / L and flow rate is 0.2L / min, the wastewater of which the initial COD concentration is 500mg / L is processed for 30min, and a COD removal rate is 90% or more so as to achieve the national first-degree discharge standard. In a catalyst use process, a metal loss amount is small,performance is excellent, and in addition, the high-efficiency catalyst has the advantages of simple preparation technology and no waste gas and is favorable for industrial production.

Description

technical field [0001] The invention belongs to the field of catalytic oxidation treatment of organic waste water, and in particular relates to an efficient catalyst for degrading water COD by ozone and a preparation method thereof. Background technique [0002] With the continuous growth of the social population, the water consumption of human beings in production and life is increasing, and a large amount of wastewater rich in organic matter is produced (often represented by the COD value), which has brought great harm to the environment and human health. harm. There are many ways to remove organic matter in wastewater and reduce water COD. When wastewater is treated with traditional treatment methods (flocculant method, adsorption method, biochemical method, electrochemical method, etc.), it may not be able to meet the national effluent quality requirements (level A standard: 50mg / L), or the cost is higher. [0003] Advanced oxidation method is a new water treatment tec...

Claims

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Application Information

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IPC IPC(8): B01J23/83C02F1/78
CPCB01J23/002B01J23/83B01J2523/00C02F1/725C02F1/78B01J2523/31B01J2523/3712B01J2523/842
Inventor 侍孟璐章文贵郭进进吴黄河奉向东
Owner 芜湖格丰环保科技研究院有限公司
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