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Method and application of catalytic activity reactivation of heterogeneous Fenton catalyst

A heterogeneous Fenton, catalytically active technology, applied in the field of environmental engineering, can solve problems such as cycle performance decline, and achieve the effect of reducing energy consumption, improving service life, high economic value and industrial application prospects

Active Publication Date: 2020-07-28
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in view of technical problems such as degradation or deactivation of heterogeneous Fenton catalyst cycle performance, a method for reactivating the catalytic activity of heterogeneous Fenton catalysts has been developed, that is, to activate the activity of heterogeneous Fenton catalysts in an electric field, Realize the improvement of the reuse rate of heterogeneous Fenton catalysts. This method is simple to operate, mild in conditions, and low in cost. It is of great significance for the application of Fenton technology.

Method used

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  • Method and application of catalytic activity reactivation of heterogeneous Fenton catalyst
  • Method and application of catalytic activity reactivation of heterogeneous Fenton catalyst
  • Method and application of catalytic activity reactivation of heterogeneous Fenton catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] I) Preparation of ethylenediaminetetraethanol functionalized magnetic graphene oxide catalytic material

[0038] I1) the preparation of graphene oxide is as follows:

[0039] (1) Measure 23mL of concentrated sulfuric acid (98%), pour it into a three-necked flask and then ice-bath it to lower its temperature below 4°C. Subsequently, 1 g of graphite powder and 0.5 g of sodium nitrate were weighed. After it is dispersed in concentrated sulfuric acid, slowly add 3g of potassium permanganate into the mixed solution within 1h, and control the reaction temperature during the addition process not to exceed 10°C; after the addition of potassium permanganate is completed, react below 10°C for 1h.

[0040] (2) The temperature of the mixed solution obtained from the above reaction was raised to 38° C., and allowed to react with stirring at 38° C. for 0.5 h. Subsequently, 80 mL of distilled water was slowly added to the mixed solution. And slowly raise the temperature to 95°C, an...

Embodiment 2

[0058]1) The magnetic ferric ferric oxide catalytic material is prepared by co-precipitation method, and the preparation method is as follows:

[0059] Take 0.01mol FeCl 3 ·6H 2 O and 0.05mol FeSO 4 ·7H 2 O was dissolved in 100mL of water. After it was completely dissolved, an appropriate amount of ammonia water was added to adjust the pH of the solution to 10, and the solution was stirred for 45 minutes to obtain black ferric oxide, followed by magnetic separation, washing, and freeze-drying.

[0060] 2) The iron ferric oxide catalyst prepared in step 1) is used for Fenton degradation, and the process is as in Example 1, step II). Degraded three times.

[0061] 3) The ferric oxide catalyst treated in step 2) is reactivated, and the process is as in step III) of Example 1.

[0062] Figure 5 It is the effect diagram of Fenton degradation of ferric oxide catalyst prepared by co-precipitation method. in Figure 5 (a, b) are the first and fourth cycles of degradation of t...

Embodiment 3

[0064] Material preparation condition is the same as embodiment 1;

[0065] Fenton's degradation condition is the same as embodiment 1;

[0066] The conductive medium in the reactivation experiment under the action of electric field is 0.1mol / L, the sodium chloride solution of 150mL, other conditions are with embodiment 1;

[0067] In the fourth Fenton degradation result, it took 12 minutes to completely degrade methylene blue.

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Abstract

The invention discloses a method and application for reactivating catalytic activity of a heterogeneous Fenton catalyst. According to the method, a heterogeneous Fenton catalyst is placed in a mediumin a direct-current electric field, is electrified, and then is subjected to reactivation treatment, and then the repeated utilization rate of the heterogeneous Fenton catalyst is improved. Meanwhile,the method is simple to operate, conditions are mild, cost is low, and the method has important significance in application improvement of the Fenton technology. According to the method disclosed bythe invention, performance of the heterogeneous Fenton catalyst can be recovered or improved, and stability of the material can be well kept. The heterogeneous Fenton catalyst prepared by the method can be used for treating a water system, and the treatment effect is equivalent to the treatment effect of a newly prepared catalyst.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a method and application for reactivating the catalytic activity of a heterogeneous Fenton catalyst. Background technique [0002] With the rapid development of cities and industries, global environmental pollution is increasing day by day. In recent years, a lot of research work has been carried out at home and abroad on the treatment technology of organic wastewater and other pollutants, among which, Fenton oxidation technology is one of the hot spots in recent years. Fenton oxidation technology is an advanced organic matter treatment technology. Usually, ferrous salt and hydrogen peroxide are combined into Fenton's reagent, Fe 2+ and H 2 o 2 The reaction generates hydroxyl radicals with high oxidation ability, which can oxidize and decompose organic dyes, phenolic wastewater, etc. into CO 2 , water and other small molecules. However, the traditional Fen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/00C02F1/72C02F101/34C02F101/30
CPCC02F1/725C02F2101/308C02F2101/345C02F2303/14C02F2305/026
Inventor 曹占芳王晶钟宏王帅
Owner CENT SOUTH UNIV
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