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Method for treating organic wastewater by using double catalysts to heterogeneously activate persulfates

A technology for activating persulfate and organic wastewater, applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of large amount of iron sludge and low effective utilization rate of persulfate, achieve high utilization rate, avoid mass production and subsequent treatment, Easy to recycle and reuse

Active Publication Date: 2014-07-02
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for utilizing the persulfate activated oxidation reaction system for the existing problems that the pH of the reaction system is acidic, the oxidation reaction is too fast so that the effective utilization rate of the persulfate is low and a large amount of iron sludge is produced. Catalyst heterogeneously activated persulfate method for treating organic wastewater

Method used

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  • Method for treating organic wastewater by using double catalysts to heterogeneously activate persulfates
  • Method for treating organic wastewater by using double catalysts to heterogeneously activate persulfates
  • Method for treating organic wastewater by using double catalysts to heterogeneously activate persulfates

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Effect test

Embodiment 1

[0048] This example compares the color of dye wastewater under four methods: single use of persulfate, single catalyst, single use of zero-valent iron to activate persulfate, single use of nano-copper oxide to activate persulfate, and use of dual catalysts to activate persulfate. Degree removal rate and CODcr removal rate.

[0049] The specific operation steps are as follows:

[0050] (1) According to figure 1 In the process sequence shown, the dye wastewater is taken, and the CODcr of the wastewater measured is 300mg / L, and the pH is 6.8. A 250mL Erlenmeyer flask was used as the reactor, and 200mL of waste water was added.

[0051] (2) Add dual catalysts into the above-mentioned Erlenmeyer flask reactor, and the preparation method of the dual catalysts is as follows: uniformly mix nano-copper oxide particles and zero-valent iron particles in a mass ratio of 1:2.

[0052] (3) The dosage of nano-copper oxide in the catalyst is 0.05g / L, and the dosage of zero-valent iron part...

Embodiment 2

[0064] A method for treating organic wastewater by utilizing dual-catalyst heterogeneously and efficiently activating persulfate, the specific operation steps are as follows:

[0065] (1) Take the dye wastewater, the CODcr of the wastewater is 300mg / L, and the pH is 6.8. A 250mL Erlenmeyer flask was used as the reactor, and 200mL of waste water was added. Adjust the pH value to 3, 5, 7, 9 respectively.

[0066] (2) A catalyst is added to the above-mentioned Erlenmeyer flask reactor, and the dosage of nano-copper oxide in the catalyst is 0.05g / L, and the dosage of zero-valent iron particles is 0.1g / L.

[0067] (3) Add 238 mg / L of sodium persulfate to the reactor in step (2) and react at room temperature for 1 hour.

[0068] Its result is as shown in table 2, and the result of table 2 shows, the method that double catalyst activated persulfate heterogeneously degrades organic waste water that the present invention establishes all can have comparatively good effect to printing ...

Embodiment 3

[0073] A method for treating organic wastewater by utilizing dual-catalyst heterogeneously and efficiently activating persulfate, the specific operation steps are as follows:

[0074] (1) Take the dye wastewater, the CODcr of the wastewater is 300mg / L, and the pH is 6.8. A 250mL Erlenmeyer flask was used as the reactor, and 200mL of waste water was added.

[0075] (2) A catalyst is added to the above-mentioned Erlenmeyer flask reactor, and the dosage of nano-copper oxide in the catalyst is 0.05g / L, and the dosage of zero-valent iron particles is 0.1g / L.

[0076] (3) Add 238 mg / L of sodium persulfate to the reactor in step (2) and react at room temperature for 1 hour.

[0077] The results are shown in Table 3, and the results in Table 3 show that the dual-catalyst activated persulfate heterogeneously degraded organic wastewater method established by the present invention ensures the persistence and high efficiency of the persulfate method.

[0078] Table 3 Two kinds of persul...

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Abstract

The invention discloses a method for treating organic wastewater by using double catalysts to heterogeneously activate persulfates, belonging to the technical field of water pollution control. According to the method, nano copper oxide and zero-valent iron particles are used as a combined catalyst to activate the persulfates to generate free sulfate radicals with strong oxidizing property, so that refractory organics are removed from the wastewater. Compared with a homogeneous persulfate water treatment technology, the method has the advantage that the heterogeneous catalysts can efficiently and continuously activate the persulfates to achieve a heterogeneous activation effect due to the properties of relatively large specific surface area, relatively high catalytic activity and the like. The double-catalyst heterogeneous persulfate activation water treatment technology established by the method disclosed by the invention is applicable to treatment of various kinds of organic wastewater, is high in efficiency, good in durability and convenient in operation, can efficiently remove toxic and harmful pollutants from the wastewater within a relatively wide pH range, provides a broad prospect for treating toxic, harmful and non-biodegradable organic wastewater, and has a great application potential in the field of environmental pollution treatment.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a method for treating organic waste water by using double catalysts to activate persulfate heterogeneously. Background technique [0002] With the rapid development of industry and agriculture, the generation and circulation of organic pollutants in wastewater have seriously threatened the ecological environment and human health. The current industrial water treatment methods are mainly concentrated in three categories: physical treatment, biological treatment and chemical treatment. The physical treatment method only achieves interphase transfer, but does not fundamentally realize the complete degradation and mineralization of organic pollutants, and it is difficult to realize the advanced treatment of organic wastewater; although the biological method has the characteristics of simple operation and low cost, it is not suitable for some toxic and diff...

Claims

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Application Information

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IPC IPC(8): C02F1/72
Inventor 马邕文王晨曦万金泉王艳黄明智
Owner SOUTH CHINA UNIV OF TECH
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