Method for degrading dye wastewater by using tetraacetylethylenediamine (TAED)/solid oxidant (SPS, SPC or SPB) catalytic oxidation system

A tetraacetylethylenediamine, dye wastewater technology, applied in chemical instruments and methods, oxidized water/sewage treatment, physical/chemical process catalysts, etc., can solve the problems of low utilization rate, accelerated dye degradation, increased energy consumption, etc., To achieve the effect of low cost, environmental friendliness and strong oxidation activity

Inactive Publication Date: 2018-06-22
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the main disadvantages of Fenton oxidation technology include: (1) the reaction can only be carried out in the acidic (pH=2-5) range, and there are iron ions in the wastewater after treatment, which is easy to cause secondary pollution and requires further follow-up treatment, so it increases Reduced the difficulty and cost of wastewater treatment
(2) where H 2 o 2 Utilization is low...

Method used

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  • Method for degrading dye wastewater by using tetraacetylethylenediamine (TAED)/solid oxidant (SPS, SPC or SPB) catalytic oxidation system
  • Method for degrading dye wastewater by using tetraacetylethylenediamine (TAED)/solid oxidant (SPS, SPC or SPB) catalytic oxidation system
  • Method for degrading dye wastewater by using tetraacetylethylenediamine (TAED)/solid oxidant (SPS, SPC or SPB) catalytic oxidation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Preparation of aqueous dye solution: Accurately weigh 1.25 grams of reactive red 195 in a 50-milliliter beaker, add a small amount of distilled water to dissolve it and transfer it to a 250-milliliter volumetric flask, then wash the beaker with a small amount of distilled water several times, and wash the solution completely Transfer to a volumetric flask, finally add distilled water to the specified scale and shake well to obtain a 5.0 g / L dye stock solution;

[0018] (2) Preparation of TAED aqueous solution: Accurately weigh 6.0 grams of TAED in a 1000 ml beaker, add a small amount of distilled water to dissolve it and transfer it to a 2000 ml volumetric flask, then wash the beaker with a small amount of distilled water several times, and transfer all the washing solution into In the volumetric flask, finally add distilled water to make the volume to the specified scale and shake well to obtain 3.0 g / L TAED aqueous solution;

[0019] (3) Preparation of SPS aqueous...

Embodiment 2

[0022] (1) process is identical with step (1) in embodiment 1;

[0023] (2) process is identical with step (2) in embodiment 1;

[0024] (3) Preparation of SPC aqueous solution: Accurately weigh 0.5 g of SPC in a 50 ml beaker, add a small amount of distilled water to dissolve it and transfer it to a 50 ml volumetric flask, then wash the beaker several times with a small amount of distilled water, and transfer all the washing solution into In the volumetric flask, finally add distilled water to the specified scale and shake to obtain 10.0 g / L SPC stock solution;

[0025] (4) Oxidative degradation reaction of dye: Measure 5 milliliters of reactive red 195 stock solution and add 34.2 milliliters of distilled water, then add 8.3 milliliters of TAED aqueous solution and 2.5 milliliters of SPC stock solution to form a 50 milliliter reaction system to make it active The concentration of Red 195 is 50 mg / L, the concentration of TAED is 0.5 g / L, and the concentration of SPC is 0.50 g / ...

Embodiment 3

[0027] (1) process is identical with step (1) in embodiment 1;

[0028] (2) process is identical with step (2) in embodiment 1;

[0029](3) Preparation of SPB aqueous solution: Accurately weigh 0.5 g of SPB in a 50 ml beaker, add a small amount of distilled water to dissolve it and transfer it to a 50 ml volumetric flask, then wash the beaker several times with a small amount of distilled water, and transfer all the washing solutions into In the volumetric flask, finally add distilled water to the specified scale and shake up to obtain 10.0 g / L SPB stock solution;

[0030] (4) Oxidative degradation reaction of dyestuff: Measure 5 milliliters of reactive red 195 stock solution and add 34.2 milliliters of distilled water, then add 8.3 milliliters of TAED aqueous solution and 2.5 milliliters of SPB stock solution to construct 50 milliliters of reaction system, make it active The concentration of Red 195 was 50 mg / L, the concentration of TAED was 0.5 g / L, and the concentration of...

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Abstract

The present invention provides a method for degrading dye wastewater by using a tetraacetylethylenediamine (TAED)/solid oxidant (SPS, SPC or SPB) catalytic oxidation system. The method comprises: adding a catalyst tetraacetylethylenediamine to dye wastewater to achieve the concentration of 0.5-2 g/L in the wastewater, adding any one oxidant (SPS, SPC or SPB) to achieve the concentration of 0.2-1 g/L in the wastewater, adjusting the pH value of the mixed solution to 9-10 with a sodium hydroxide solution, and carrying out a reaction on the mixed solution for 30 min at a temperature of 30-70 DEGC so as to achieve the decolorization degradation of the dye. According to the present invention, with the application of the TAED/solid oxidant catalytic oxidation system in the dye degradation treatment, the characteristics of high safety, high efficiency and environmental friendliness can be achieved; and the method can promote the degradation of the dye by using the inorganic salts and the surfactants in the wastewater, such that the operation cost is low, and the method is easy to perform.

Description

technical field [0001] The invention relates to chemical catalyst technology, in particular to a TAED (tetraacetylethylenediamine) catalyzed solid oxidant to degrade dye wastewater. Background technique [0002] In recent years, with the continuous development of society and the acceleration of industrialization, the problem of water pollution has become one of the outstanding problems that people need to solve urgently. Fenton oxidation technology is an industrial wastewater treatment technology with bright development prospects, using iron ions to H 2 o 2 The decomposition reaction of the reaction produces strong oxidizing hydroxyl radicals, which can degrade organic pollutants that are difficult to biodegrade in water, such as dyes, and have the advantages of high efficiency and low cost. But the main disadvantages of Fenton oxidation technology include: (1) the reaction can only be carried out in the acidic (pH=2-5) range, and there are iron ions in the wastewater afte...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J31/02C02F101/30
CPCB01J31/0235C02F1/725C02F2101/308
Inventor 董永春张丛灿王鹏刘雨琪刘春燕
Owner TIANJIN POLYTECHNIC UNIV
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