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Method used for removing chlorination disinfection by-product trichloroacetaldehyde via ozone catalytic oxidation

A technology of ozone catalytic oxidation and trichloroacetaldehyde, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the problem of high material cost, complicated process, and lack of chlorinated disinfection by-product trichloroethyl Aldehyde control measures and other issues, to achieve a strong oxidation effect

Inactive Publication Date: 2017-09-15
SHENZHEN WATER GRP CO LTD
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Problems solved by technology

[0005] The main technical problems and defects in the prior art: the lack of control measures for chlorinated disinfection by-product chloral, the degradation and removal of chloral by ozone catalytic oxidation provides a way out for the solution of the problem of chloral in drinking water
The process is complicated and the material cost is high

Method used

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  • Method used for removing chlorination disinfection by-product trichloroacetaldehyde via ozone catalytic oxidation

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Embodiment Construction

[0023] The implementation of the present invention will be described below through specific examples, but the present invention is not limited thereto.

[0024] In order to solve the current lack of control technology for chlorinated disinfection by-product chloral, O 3 Oxidation has the problem of complete oxidation, using O 3 、H 2 o 2 、TiO 2 Composite oxidation forms O 3 The catalytic oxidation system degrades chloral in water.

[0025] O 3 Dosage (0.5, 1.0, 1.5mg / L), H 2 o 2 / O 3 (0.2, 0.5, 1.0) molar ratio, TiO 2 Dosage (50, 100, 150mg / L). Taking the removal rate of chloral as the test index, the test method and results are shown in Table 1.

[0026] Table 1 Experimental methods and results

[0027]

[0028] As can be seen from the above results, when the concentration of chloral is measured by 50 μg / L, ozone (O 3 ) dosage is preferably 150mg / L; preferably H 2 o 2 / O 3 The molar ratio is 0.5-1; TiO is preferred 2 The dosage is 50-150mg / L. Realized that...

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Abstract

The invention belongs to the technical field of drinking water processing, and relates to a method used for removing chlorination disinfection by-product trichloroacetaldehyde via ozone catalytic oxidation. According to the method, ozone (O3), hydrogen peroxide (H2O2), and titanium dioxide (TiO2) are adopted for catalytic oxidation to remove chlorination disinfection by-product trichloroacetaldehyde. The method is capable of solving a problem that oxidation with pure ozone is incomplete; the oxidation capacity of generated .OH is extremely high; almost all chlorination disinfection by-product trichloroacetaldehyde in water can be removed; and a solution scheme is provided for trichloroacetaldehyde control.

Description

technical field [0001] The invention belongs to the technical field of drinking water treatment, and relates to a method for removing trichloroacetaldehyde, a by-product of chlorination disinfection, by catalytic oxidation with ozone. Background technique [0002] Chlorine (including sodium hypochlorite) is still the most widely used disinfectant in drinking water treatment. While ensuring the microbial safety of drinking water, chlorine disinfection can react with organic matter in drinking water to generate a variety of chlorinated disinfection by-products. More than 700 kinds of by-products of chlorination disinfection have been found so far, which pose serious hazards to human health. Halogenated aldehydes are the third largest type of disinfection by-products after trihalomethanes and haloacetic acids, among which trichloroacetaldehyde accounts for 25-48% of the total halogenated acetaldehydes in my country's drinking water treatment, and is the main halogenated acetald...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/78C02F101/36
CPCC02F1/722C02F1/725C02F1/78C02F2101/36
Inventor 蔡广强刘伟张金松黄河洵
Owner SHENZHEN WATER GRP CO LTD
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