Process for efficient removing organic pollutant in water by catalysis and ozonization

A technology of organic pollutants and ozone oxidation, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of incomplete elimination of pollution, secondary pollution of water, high treatment costs, etc., and achieve high The effect of practical application value, reduction of processing cost, and simple operation method

Inactive Publication Date: 2008-08-27
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Source water, groundwater, surface water and industrial wastewater contain various refractory organic pollutants to varying degrees, such as various insecticides, herbicides, fungicides, macromolecule humus, and small molecule organic carboxylic acids. It is difficult to completely remove them by the existing water treatment process; in addition, Cl 2 , ClO 2 After treatment by oxidation methods, a series of by-products that still have toxicity and endocrine disrupting activity will be formed, which will cause secondary pollution to the treated water; due to O 3 It is highly oxidizing, unstable, and becomes oxygen after decomposition, so ozonation is a safer water treatment technology
Studies have shown that ozone oxidation alone can effectively remove a variety of refractory organic pollutants, but under different pH conditions, O 3 The oxidation reaction is extremely selective and cannot completely mineralize most substances into CO 2 and H 2 O, these substances still exist in the form of organic compounds containing aromatic rings or small molecular organic carboxylic acids, which cannot completely eliminate their pollution to water
UV / O developed in recent years 3 method and TiO 2 Photocatalytic treatment of refractory organic pollutants in water has been proven to have a good effect, but due to its high requirements on the reactor, powder TiO 2 The separation of catalysts in water after photocatalytic treatment is difficult, and the treatment cost is high, so it is difficult to apply to the actual water treatment process

Method used

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  • Process for efficient removing organic pollutant in water by catalysis and ozonization
  • Process for efficient removing organic pollutant in water by catalysis and ozonization
  • Process for efficient removing organic pollutant in water by catalysis and ozonization

Examples

Experimental program
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Effect test

Embodiment 1

[0019] In the glass reactor that volume is 100ml, add alachlor solution 75ml, adjust O 3 Each parameter of the generator reaches the set value, and O is generated at a flow rate of 40ml / min. 3 , after the gas flow is stable for 2 minutes, the gas inlet of the reactor is connected, and the timing is started, and the oxidation reaction is carried out in an airtight manner, and this time is regarded as 0 time. Carry out catalytic ozonation treatment under the following conditions:

[0020] Reaction target solution volume: 75ml

[0021] Reaction target solution concentration: Alachlor: 100mg / L, TOC: 60mg / L

[0022] Reaction target solution temperature: 20°C

[0023] Reaction solution system: 0.001M phosphate buffer solution

[0024] Solution initial pH: 7.00

[0025] o 3 Occurrence concentration: 12.2mg / L / min

[0026] Catalytic material: a cylindrical material formed by catalyst powder loaded on the surface of a honeycomb ceramic body

[0027] Processing method: dynamic pr...

Embodiment 2

[0032] In the glass reactor that volume is 100ml, add alachlor solution 75ml, adjust O 3 Each parameter of the generator reaches the set value, and O is generated at a flow rate of 40ml / min. 3 , after the gas flow is stable for 2 minutes, the gas inlet of the reactor is connected, and the timing is started, and the oxidation reaction is carried out in an airtight manner, and this time is regarded as 0 time. Carry out catalytic ozonation treatment under the following conditions:

[0033] Reaction target solution volume: 75ml

[0034] Reaction target solution concentration: Alachlor: 100mg / L, TOC: 60mg / L

[0035] Reaction target solution temperature: 20°C

[0036] Reaction solution system: 0.001M phosphate buffer solution

[0037] Solution initial pH: 4.30

[0038] o 3 Occurrence concentration: 12.2mg / L / min

[0039] Catalytic material: a cylindrical material formed by catalyst powder loaded on the surface of a honeycomb ceramic body

[0040] Processing method: dynamic pr...

Embodiment 3

[0045] In the glass reactor that volume is 100ml, add alachlor solution 75ml, adjust O 3 Each parameter of the generator reaches the set value, and O is generated at a flow rate of 40ml / min. 3 , after the gas flow is stable for 2 minutes, the gas inlet of the reactor is connected, and the timing is started, and the oxidation reaction is carried out in an airtight manner, and this time is regarded as 0 time. Carry out catalytic ozonation treatment under the following conditions:

[0046] Reaction target solution volume: 75ml

[0047] Reaction target solution concentration: Alachlor: 100mg / L, TOC: 60mg / L

[0048] Reaction target solution temperature: 20°C

[0049] Reaction solution system: 0.001M phosphate buffer solution

[0050] Solution initial pH: 9.10

[0051] o 3 Occurrence concentration: 12.2mg / L / min

[0052] Catalytic material: a cylindrical material formed by catalyst powder loaded on the surface of a honeycomb ceramic body

[0053] Processing method: dynamic pr...

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Abstract

The present invention belongs to the field of water treating application technology. The efficient catalytically ozonizing process of eliminating organic pollutant in water is that in the presence of loaded Cu / Al2O3 material as catalyst, ozone in certain concentration and flow rate as oxidant introduced into water with hard-to-degrade organic pollutant continuously and stably, so that the hard-to-degrade organic pollutant in water is reacted with O3 fully in dynamic or static condition for being eliminated completely. When the said process is used in treating alachlor in water, elimination rate as high as 99 % and TOC eliminating rate of 90 % may reach. Without secondary pollution, the present invention is one safe and efficient treating method of eliminating organic pollutant in water.

Description

technical field [0001] The invention relates to a method for efficiently catalytic ozone oxidation to remove refractory organic pollutants in water, specifically in a Cu / Al 2 o 3 Under the action of the catalyst, catalytic ozonation removes refractory organic pollutants in water. Finally, the complete mineralization removal of refractory organic pollutants in water is realized. Background technique [0002] Source water, groundwater, surface water and industrial wastewater contain various refractory organic pollutants to varying degrees, such as various insecticides, herbicides, fungicides, macromolecule humus, small molecule organic carboxylic acids, etc. It is difficult to completely remove them by the existing water treatment process; in addition, Cl 2 , ClO 2 After treatment by oxidation methods, a series of by-products that still have toxicity and endocrine disrupting activity will be formed, which will cause secondary pollution to the treated water; due to O 3 It ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78B01J23/72B01J21/04
Inventor 曲久辉李海燕
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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