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Method of degrading dye wastewater by iron-based amorphous alloy/hydrogen peroxide Fenton-like system

An iron-based amorphous alloy and hydrogen peroxide technology, which is applied in water/sewage treatment, reduced water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of single pollutant composition and low pollutant removal rate

Inactive Publication Date: 2014-06-25
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the low pollutant removal rate or single pollutant components are the limitations of current amorphous alloy materials for degrading sewage.

Method used

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  • Method of degrading dye wastewater by iron-based amorphous alloy/hydrogen peroxide Fenton-like system
  • Method of degrading dye wastewater by iron-based amorphous alloy/hydrogen peroxide Fenton-like system
  • Method of degrading dye wastewater by iron-based amorphous alloy/hydrogen peroxide Fenton-like system

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Experimental program
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Embodiment 1

[0020] At 25°C, to an initial concentration of 10mg·L -1 100g of methylene blue dye solution was added with 1g of iron-based amorphous alloy strip slices and H 2 o 2 The mass fraction is 30% hydrogen peroxide, and then magnetically stirred for 80 minutes at a stirring rate of 200 rpm. The mass ratio of methylene blue dye solution to iron-based amorphous alloy slices is 100:1; after adding hydrogen peroxide, H 2 o 2 The molar concentration in the dye solution mixture is 10mmol L -1 . The change of the dye removal rate in the dye solution with time is as follows: figure 1 The circular data points in the middle are shown.

[0021] The chemical composition molecular formula of the iron-based amorphous alloy strip slice used in this embodiment is Fe 78 Si 9 B 13 , the slice width was 4 mm, the thickness was 40 μm, and the length was 10 mm.

Embodiment 2

[0027] At 25°C, to an initial concentration of 10mg·L -1 100g of the methylene blue dye solution was added with 1g of iron-based amorphous alloy strip slices and 30% hydrogen peroxide, and then magnetically stirred for 30 minutes at a stirring rate of 200rpm. The mass ratio of dye solution to iron-based amorphous alloy slices is 100:1; after adding hydrogen peroxide, H 2 o 2 The molar concentration in the dye solution mixture is 10mmol L -1 . The change of the dye removal rate in the dye solution with time is as follows: figure 2 The data points in the middle triangle are shown.

[0028] The chemical composition molecular formula of the iron-based amorphous alloy strip slice used in this embodiment is Fe 76 Mo 2 Si 9 B 13 , the slice width was 4 mm, the thickness was 40 μm, and the length was 10 mm.

Embodiment 3

[0033] At 25°C, to an initial concentration of 10mg·L -1 100g of the methylene blue dye solution was added with 1g of iron-based amorphous alloy strip slices and 30% hydrogen peroxide, and then magnetically stirred for 50 minutes at a stirring rate of 200rpm. The mass ratio of dye solution to iron-based amorphous alloy slices is 100:1; after adding hydrogen peroxide, H 2 o 2 The molar concentration in the dye solution mixture is 10mmol L -1 . The change of the dye removal rate in the dye solution with time is as follows: image 3 The data points in the middle triangle are shown.

[0034] The chemical composition molecular formula of the iron-based amorphous alloy strip slice used in this embodiment is Fe 75 Mo 3 Si 9 B 13 , the slice width was 4 mm, the thickness was 40 μm, and the length was 10 mm.

[0035] Such as image 3As shown, the dye removal rate reached 80% after 50 minutes of reaction.

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Abstract

The invention provides a method of degrading dye wastewater by an iron-based amorphous alloy / hydrogen peroxide Fenton-like system. The method is characterized by comprising the following steps: inputting iron-based amorphous alloy ribbon slices and hydrogen peroxide into the dye wastewater; then mixing and stirring, wherein the weight ratio of the dye wastewater and the iron-based amorphous alloy ribbon slices is 100:1, the mass fraction of H2O2 in hydrogen peroxide is 20-30%, and the molar concentration of H2O2 in the dye wastewater is 10-20mmol / L. According to the method of degrading dye wastewater by the iron-based amorphous alloy / hydrogen peroxide Fenton-like system provided by the invention, the dye is initially degraded to Fe<2+> by reducing action of the iron-based amorphous alloy to accelerate growth of OH. free radicals which further oxidize and degrade macromolecules of the dye to micromolecules, and finally, the micromolecules are mineralized to CO2 and H2O. The method is high in degradation rate and thorough in reaction.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for degrading dye sewage by an iron-based amorphous alloy / hydrogen peroxide-like Fenton system. Background technique [0002] Dyestuffs are widely used in modern industries such as printing, textiles, and tanning. The sewage generated during the production and processing process has complex components, large molecular weight, and high chroma. It is difficult to be biodegradable, and even carcinogenic. The common physical adsorption method does not finally degrade the dye sewage, but transfers the dye molecules from the water to the surface of the adsorption material. Dye wastewater is one of the most difficult industrial wastewater to treat at present. [0003] Advanced oxidation technology (Advanced Oxidation Processes, AOPs) has a high removal efficiency for refractory organic substances in sewage. Advanced oxidation methods include ozone oxidation, photocatalytic oxi...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/70C02F1/58
Inventor 李翔甘卓然潘登
Owner UNIV OF SHANGHAI FOR SCI & TECH
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