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Organic-wastewater catalytic oxidation method

A technology of organic wastewater and catalytic oxidation, applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of toxic transition metal ions, etc., achieve good effect, simple process flow, and reduce the cost of sewage treatment

Active Publication Date: 2014-05-14
武汉原上草环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods of introducing light, electricity or metal ion catalysts have been widely studied by scholars and have achieved good results. However, some of these methods are based on the consumption of other energy sources, and some may bring toxic transition metal ions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Ferric oxide / sodium persulfate system: Add ferric oxide to orange II wastewater, then add sodium persulfate, mix well, and the reaction starts. At this time, the concentration of ferric oxide in the system is 1g / L, sodium persulfate The concentration was 5mmol / L, and the concentration of Orange II was 20mg / L; the reaction was stirred for 30 minutes, and the decolorization rate of Orange II was measured to be 10%.

[0020] Ferric oxide / vitamin C / sodium persulfate system: Add ferric oxide and vitamin C in sequence to orange Ⅱ wastewater, and finally add sodium persulfate, mix well, and the reaction starts. At this time, the concentration of ferric oxide in the system is 1g / L, the concentration of vitamin C is 2.5mmol / L, the concentration of sodium persulfate is 5mmol / L, and the concentration of Orange II is 20mg / L; the reaction is stirred for 30 minutes, and the decolorization rate of Orange II is measured to be about 15%.

[0021] Ferric oxide / methanol / sodium persulfate ...

Embodiment 2

[0025] The decolorization effect of the ferric oxide / methanol / vitamin C / sodium persulfate system in Example 1 on the orange yellow II waste liquid was compared under the conditions of different initial pH values.

[0026] Add ferric oxide, methanol and vitamin C to the orange yellow II waste liquid in sequence, and then use NaOH solution or H 2 SO 4 The solution adjusts the pH value of the reaction solution, finally add sodium persulfate, mix well, and the reaction starts. At this time, the concentration of ferric oxide in the system is 1g / L, the concentration of methanol is 0.25mol / L, and the concentration of vitamin C is 2.5mmol / L , The concentration of sodium persulfate is 5mmol / L, and the concentration of orange II is 20mg / L; stir and react for 30 minutes, and measure the decolorization rate of the solution immediately.

[0027] It can be seen from the table below that the ferric oxide / methanol / vitamin C / sodium persulfate system can rapidly degrade orange II in a wide pH ...

Embodiment 3

[0030] Investigate the feasibility of other iron oxides degrading orange II in this system. In this example, goethite (the main component is α-FeOOH) and Fe-SBA-15 (where SBA-15 is a mesoporous molecular sieve, which is widely used in the synthesis of catalysts as a carrier) instead of ferric oxide in the oxidation system.

[0031] (1) Prepare the solution in the same manner as in Example 1 for the ferric oxide / methanol / vitamin C / sodium persulfate system, except that goethite is used instead of ferric oxide; the goethite in the system at the beginning of the reaction The concentration is 0.5g / L, the concentration of methanol is 0.25mol / L, the concentration of vitamin C is 1.5mmol / L, the concentration of sodium persulfate is 3mmol / L, and the concentration of orange II is 20mg / L.

[0032] (2) Prepare the solution in the same manner as the system of ferric oxide / methanol / vitamin C / sodium persulfate in Example 1, except that Fe-SBA-15 is used to replace ferric oxide; Fe in the sy...

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Abstract

The invention discloses an organic-wastewater catalytic oxidation method. Alcohol, a catalyst containing iron, an additive and an oxidizing agent are sequentially added to organic wastewater, and the mixture is stirred for a reaction till organic pollutants are decomposed. According to the organic-wastewater catalytic oxidation method, environment-friendly vitamin C and vitamin E are added, consumption of other reagents or additional energy is not needed, the pH does not need to be additionally adjusted either, as a result, cost is lowered, and pollution is reduced; the catalyst containing the iron can be used repeatedly, and the efficiency of degradation of the organic wastewater through the catalyst containing the iron which is used repeatedly is higher; in the treatment process of the organic wastewater, methyl alcohol or ethyl alcohol or tert-butyl alcohol can be from corresponding waste liquor containing alcohol, in this way, the waste liquor is reused, resources are saved, and cost is lowered; the organic-wastewater catalytic oxidation method is also quite simple in technological process, high in operability and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and relates to a method for catalytic oxidation of organic wastewater. Background technique [0002] Environmental protection is an issue that is widely concerned by human society. With the development of the national economy, water pollution and soil pollution have become a major problem in environmental governance. In the past ten years, advanced oxidation technology has been widely used in the treatment of organic wastewater and soil, especially how to promote the treatment efficiency of advanced oxidation technology has become a hot spot of scientific research. At present, the methods of introducing light, electricity or metal ion catalysts have been widely studied by scholars and have achieved good results. However, some of these methods are based on the consumption of other energy sources, and some may bring toxic transition metal ions. Therefore, it is still very urgent to dev...

Claims

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Application Information

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IPC IPC(8): C02F1/72
Inventor 张晖雷洋艾佳王佳文
Owner 武汉原上草环保科技有限公司
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