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Method for degrading azo dye wastewater

A technology for azo dyes and wastewater, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of not destroying the molecular structure of azo dyes, increasing costs, and being expensive.

Inactive Publication Date: 2018-12-28
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon adsorption is a traditional treatment method, but it is limited to physical adsorption and cannot destroy the molecular structure of azo dyes, and its follow-up treatment is still very complicated.
The biodegradation method is often limited by the environmental conditions of degradation, which requires considerable equipment support, which increases the cost and limits its scope of application.
Due to the high price of photocatalysis, its popularization and application are limited.

Method used

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  • Method for degrading azo dye wastewater
  • Method for degrading azo dye wastewater
  • Method for degrading azo dye wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Prepare iron-based amorphous alloy strips, fix the concentration of azo dye, pH = 6, and determine the optimal ratio

[0025] 1) Select commercially available high-purity Fe blocks, Co blocks, Si and FeB alloy (Fe:B=79.5:20wt.%) blocks as raw materials, first remove the surface oxide scale of the pure metal blocks and put them in absolute ethanol, Prevent oxidation.

[0026] 2) Put the master alloy raw material prepared in step 1) into the water-cooled copper crucible of the vacuum melting furnace for repeated melting for 5 times to ensure the uniformity of the master alloy.

[0027] 3) After polishing the surface scale of the master alloy master ingot obtained in step 2), put it into a quartz test tube with a bottom opening diameter of 1 mm in a single-roller stripping machine (WK-II), and adjust the surface line of the single-roller. The speed is 42m / s, and iron-based amorphous strips are prepared.

[0028] Adopt the Fe prepared in example 1 68 co 10 Si ...

Embodiment 2

[0031] Example 2 Prepare iron-based amorphous alloy strips, fix the concentration of azo dye, pH=8, and determine the optimal ratio

[0032]1) Select commercially available high-purity Fe blocks, Co blocks, Si and FeB alloy (Fe:B=79.5:20wt.%) blocks as raw materials, first remove the surface oxide scale of the pure metal blocks and put them in absolute ethanol, Prevent oxidation.

[0033] 2) Put the master alloy raw material prepared in step 1) into the water-cooled copper crucible of the vacuum melting furnace for repeated melting for 5 times to ensure the uniformity of the master alloy.

[0034] 3) After grinding the surface scale of the master alloy master ingot obtained in step 2), put it into a quartz test tube with a diameter of 1mm at the bottom of the single-roll belt throwing machine (WK-II), and adjust the surface line of the single roll. The speed is 42m / s, and iron-based amorphous strips are prepared.

[0035] Adopt the Fe prepared in example 2 68 co 10 Si 8 B...

Embodiment 3

[0038] Example 3 Prepare iron-based amorphous alloy strips, fix the concentration of azo dye, pH=10, and determine the optimal ratio

[0039] 1) Select commercially available high-purity Fe blocks, Co blocks, Si and FeB alloy (Fe:B=79.5:20wt.%) blocks as raw materials, first remove the surface oxide scale of the pure metal blocks and put them in absolute ethanol, Prevent oxidation.

[0040] 2) Put the master alloy raw material prepared in step 1) into the water-cooled copper crucible of the vacuum melting furnace for repeated melting for 5 times to ensure the uniformity of the master alloy.

[0041] 3) After grinding the surface scale of the master alloy master ingot obtained in step 2), put it into a quartz test tube with a diameter of 1mm at the bottom of the single-roll belt throwing machine (WK-II), and adjust the surface line of the single roll. The speed is 42m / s, and iron-based amorphous strips are prepared.

[0042] Adopt the Fe prepared in example 3 68 co 10 Si 8...

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Abstract

The invention relates to a method for degrading azo dye wastewater. The method is characterized in that an amorphous alloy strip of Fe68Co10Si8B13 is adopted and H2O2 and PS(Na2S2O8) are added for promoting degradation of the azo dye wastewater, and under the action of mechanical stirring, the degradation efficiency of azo dyes is greatly improved by synergism of H2O2 and PS; the maximum absorbency of the azo dyes is detected by an ultraviolet-visible light photometer, the method has an obvious degradation effect on a direct blue dye solution, and the removal rate of the dyes after being degraded for 5 min reaches 99% or higher.

Description

technical field [0001] The invention relates to a method for degrading sewage, which belongs to the field of application of new materials in sewage treatment. Background technique [0002] Since organic dyes were first synthesized by Perkin in 1875, until the end of last century, the annual output of organic dyes was close to 100 tons, more than half of which were azo dyes. Azo dyes are a class of organic compounds in which the two ends of the azo group are connected to aryl groups. They are the most widely used synthetic dyes in the printing and dyeing process of textiles and clothing. They are used for dyeing and printing of various natural and synthetic fibers. Coloring of paint, plastic, rubber, etc. According to the survey, about 12% of the dyes flow into the wastewater every year. If the wastewater is not properly treated, the wastewater will flow into rivers, lakes or groundwater, which will cause great damage to the ecological environment. [0003] The commonly use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70C02F101/38
CPCC02F1/705C02F2101/308C02F2101/38
Inventor 王鑫铭文涛彭思远尹付成李智
Owner XIANGTAN UNIV