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Method for treating dye waste water by virtue of ultraviolet photocatalysis

A technology for dye wastewater and catalytic treatment, applied in chemical instruments and methods, special compound water treatment, light water/sewage treatment, etc., to achieve the effects of simple process flow, good photocatalytic performance, and easy filtration and separation

Inactive Publication Date: 2018-12-21
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the UV catalytic degradation of dye wastewater using MXene materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Prepare 400 mL of Congo red solution with a concentration of 0.05 g / L, add 0.46 g of the prepared MXene material, place it under ultraviolet light, and continue stirring. After 20 minutes, use a centrifuge to centrifuge the sample at a speed of 4500 rpm for 5 minutes, take the supernatant and centrifuge it again for 5 minutes, and then take the supernatant to test its decomposition efficiency. The decomposition rate of Congo red dye is 90%. .

Embodiment 2

[0017] Prepare 400 mL of Congo red solution with a concentration of 0.05 g / L, add 0.46 g of the prepared MXene material, place it under ultraviolet light, and continue stirring. After 120 minutes, the sample was centrifuged at 4500 rpm for 5 minutes with a centrifuge, and the supernatant was centrifuged for another 5 minutes, and then the supernatant was taken to test its decomposition efficiency, and the decomposition rate of Congo red dye was 94%. .

Embodiment 3

[0019] Prepare 400 mL of methyl orange solution with a concentration of 0.05 g / L, add 0.46 g of the prepared MXene material, place it under ultraviolet light, and continue stirring. After 100min, use a centrifuge to centrifuge the sample at a speed of 4500 rpm for 5 minutes, take the supernatant and centrifuge it again for 5 minutes, then take the supernatant to test its decomposition efficiency, and the decomposition rate of methyl orange dye is 93.7 %.

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PUM

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Abstract

The invention belongs to the technical field of dye waste water treatment, and relates to a method for treating dye waste water by virtue of ultraviolet photocatalysis. The method comprises the following steps: uniformly mixing the dye waste water under a rapid stirring condition, adding a two-dimensional layered material MXene photocatalyst, controlling the mass percentage concentration of the two-dimensional layered material MXene photocatalyst in the system at 0.01 to 5 percent, and uniformly mixing; and starting an ultraviolet light source, and performing uniform radiation reaction for 10to 200 minutes under a stirring condition. The method is simple in process, the prepared MXene material is good in photocatalytic performance, high in chemical stability, easy to filter and separate,free from producing secondary pollution to the waste water, capable of avoiding the introduction of acid, alkali, oxidant and the like, high in reaction efficiency and significant in economic benefit.

Description

technical field [0001] The invention belongs to the technical field of dye wastewater treatment, and relates to a method for ultraviolet photocatalytic treatment of dye wastewater, in particular to a method for using a two-dimensional layered material MXene photocatalyst to carry out ultraviolet photocatalytic degradation of dye wastewater. Background technique [0002] With the continuous development of society, the scale of printing and dyeing industry continues to expand, but the printing and dyeing process will produce a large amount of printing and dyeing wastewater with deep color, refractory and complex components, which cannot be treated by ordinary biological methods, and the wastewater cannot be discharged up to the standard. Ultraviolet photocatalytic technology has unique advantages such as mild reaction conditions, simple operation, and low cost, but it still needs to be further improved in terms of degradation efficiency. [0003] MXene, a novel two-dimensional...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F101/30
CPCC02F1/32C02F2101/308C02F2305/10
Inventor 韩润林谢永丽栾其斌
Owner DALIAN UNIV OF TECH
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