Reagent for accelerating Fenton reaction as well as preparation method and application thereof

A technology of Fenton reaction and Fenton reagent, which is applied in the field of reagents for accelerating Fenton reaction and its preparation, can solve the problems of unsatisfactory catalyst activity, stability, acceleration rate, narrow solution pH range, and large input amount, and achieve Good biological safety, stable product quality, and the effect of reducing economic costs

Active Publication Date: 2021-04-06
GUANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With Fenton's reagent (Fe 2+ and H 2 o 2 ) is called the traditional Fenton reaction, which has the following disadvantages: (1) the pH range of the solution is narrow, and research has found that the optimal pH range of the Fenton reagent is 2 to 4; (2) a large amount of iron sludge is produced , when the pH>4, the Fe produced by the reaction in the solution 3+ Easily hydrolyzed into a large amount of solid precipitation; (3)H 2 o 2 Large input and difficult to recycle
However, the existing heterogeneous supported Fenton catalytic technology still cannot meet the requirements of industrial wastewater treatment and oxidation of TMB in terms of catalyst activity, stability, and acceleration rate.

Method used

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  • Reagent for accelerating Fenton reaction as well as preparation method and application thereof
  • Reagent for accelerating Fenton reaction as well as preparation method and application thereof
  • Reagent for accelerating Fenton reaction as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A reagent for accelerating the Fenton reaction, the reagent for accelerating the Fenton reaction is copper carbon dot CuCD.

[0042] The preparation method comprises the following steps:

[0043] Step S1. Place 3,4-dihydroxyphenylpropionic acid (DHCA) and copper chloride in a beaker, dissolve with deionized water, stir for 5 minutes, add 2,2'-(ethylenedioxy)diethylamine (EDA ), stirred for 5min.

[0044] Step S2. Transfer the solution into a polytetrafluoroethylene-lined autoclave, place it in a muffle furnace at 180° C. for 5 h, and cool to room temperature.

[0045] Step S3. The solution is centrifuged, passed through a 0.22 μm water phase filter membrane, repeated three times, and the filtrate is loaded into a dialysis bag (molecular weight cut-off 500D) and dialyzed for 3 days, and deionized water is changed every 12 hours, and freeze-dried to obtain copper carbon dots (CuCD) .

[0046] Such as Figure 1-Figure 5 As shown, copper carbon dots (CuCD) mainly contai...

Embodiment 2

[0048] Example 2 Copper carbon dot CuCD is applied to degrade rhodamine B

[0049] The copper carbon dot CuCD prepared in Example 1 was prepared into a 10 mg / mL CuCD solution. Prepare 0.01mol / L FeSO 4 solution, 1% H 2 o 2 (volume ratio) solution and 1mg / mL RhB solution, add 2.2mL deionized water, 1.5mL H 2 o 2 , 200uL FeSO 4 Solution, 20uL CuCD solution and 80uL RhB were reacted at 40°C, and the absorbance of the solution was measured regularly.

Embodiment 3

[0056] Example 3 Comparison of copper carbon dot CuCD degradation of rhodamine B at different temperatures

[0057] The copper carbon dot CuCD prepared in Example 1 was prepared into a 10 mg / mL CuCD solution. Prepare 0.01mol / L FeSO 4 solution, 1% H 2 o 2 (volume ratio) solution and 1mg / mL RhB solution, add 2.2mL deionized water, 1.5mL H 2 o 2 solution, 200uL FeSO 4 solution, 20uL CuCD solution and 80uL RhB, put the test tubes at different temperatures (25°C, 30°C, 40°C, 50°C, 60°C, 70°C, 80°C) for 5 minutes, measure the absorbance of the solution, and calculate the RhB The degradation rate, see the results Figure 8 .

[0058] From Figure 8 It can be seen that as the temperature increases, the degradation rate of RhB gradually increases. At 80°C, the degradation rate can approach 100% after 5 minutes of reaction, which has a relatively high degradation rate and degradation rate.

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Abstract

The invention provides a reagent for accelerating Fenton reaction as well as a preparation method and application of the reagent. The reagent for accelerating the Fenton reaction is copper carbon dot CuCD, and the preparation method comprises the following steps: S1, mixing 3, 4-dihydroxyphenylpropionic acid and copper chloride, dissolving the mixture with deionized water, uniformly stirring, adding 2, 2'-(ethylenedioxy) diethylamine, and performing stirring; S2, transferring the solution obtained in the step S1 into a reaction kettle, reacting at 170-190 DEG C for 4-6 hours, and performing cooling to room temperature; S3, centrifuging the solution after the reaction in the step S2, enabling the solution to pass through a water-phase filter membrane, then putting the filtrate into a dialysis bag for dialysis, and freeze-drying to obtain the copper-carbon dots CuCD. The reagent for accelerating the Fenton reaction can be combined with a Fenton reagent, is applied to treatment of organic matters in water, has good biological safety, can accelerate the reaction rate of the Fenton reagent, improves the degradation rate of pollutants in wastewater, and accelerates the oxidation rate of 3, 3', 5, 5'-tetramethyl benzidine.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a reagent for accelerating the Fenton reaction and its preparation method and application. Background technique [0002] Dye wastewater has the characteristics of high chroma, complex composition and high organic matter content, and contains a large amount of toxic and harmful pollutants, which poses serious harm to the environment and human health. Among them, Rhodamine B (RhB) is a basic dye with a bright pink color, an organic substance mainly composed of xanthone, which has strong stability in aqueous solution and is difficult to decompose. [0003] At present, the main methods used to treat RhB-containing wastewater are adsorption, biological and oxidation. Among them, the removal of toxic pollutants by the adsorption method is not thorough, and may even cause secondary pollution; the biodegradation method is the result of the combined action of biosorption and biod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/38
CPCC02F1/722C02F1/725C02F2101/38C02F2305/026Y02W10/37
Inventor 黄岗柴智慧唐培朵陈东陆琦覃秋容廖思明黄艳燕黄华林杜芳黎
Owner GUANGXI ACAD OF SCI
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