Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for decolorizing and degrading dye wastewater by using alkali/solid oxidant system

A technology for dye wastewater and oxidant, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc. problem, to achieve the effect of fast response rate, green and safe operation cost, and low operation cost

Active Publication Date: 2021-03-23
HUAQIAO UNIVERSITY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Fenton system also has some disadvantages: (1) Fenton reaction uses hydrogen peroxide solution, which has safety problems such as inconvenient storage and transportation; (2) Fenton reaction needs to add high-concentration ferrous ions, which will A large amount of iron precipitation is generated, which increases the difficulty and cost of treatment; (3) The optimum pH range of the Fenton system is pH 3 to 5, and it is often necessary to add acid in advance for acidification treatment, which will accelerate the corrosion of treatment equipment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for decolorizing and degrading dye wastewater by using alkali/solid oxidant system
  • A method for decolorizing and degrading dye wastewater by using alkali/solid oxidant system
  • A method for decolorizing and degrading dye wastewater by using alkali/solid oxidant system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Use alkali to adjust the pH value of the dye orange G wastewater to be treated to 11, then add sodium percarbonate to the water body, stir and react evenly at a temperature of 25°C for 60 minutes, and then complete the method of decolorizing and degrading dye wastewater by using an alkali / solid oxidant system ; Wherein, the molar ratio of organic pollution and solid oxidant in the dye wastewater to be treated is 0.1:12.

[0025] The curve graph of the removal effect of orange G and the removal effect of orange G when no alkali is added in the present embodiment is as follows figure 1 Shown; Among them, ▲ is the removal effect curve of orange G in test 1; ■ is the removal effect curve of orange G when no alkali is added. from figure 1 It can be seen from the figure that after adding alkali to the solid oxidant, the generation of free radicals in the reaction and the removal of pollutants are obviously promoted. As time goes by, the remaining orange G is less and less. A...

Embodiment 2

[0027] Use alkali to adjust the pH value of the dye Rhodamine B wastewater to be treated to 13, then add calcium percarbonate to the water body, uniformly stir and react for 60 minutes at a temperature of 25°C, and then complete the decolorization and degradation of the dye wastewater by using the alkali / solid oxidant system Method; wherein, the molar ratio of organic pollutants and solid oxidants in the dye wastewater to be treated is 0.1:12.

[0028] The curve graph of the removal effect of rhodamine B in this embodiment acid and the removal effect of rhodamine B when no alkali is added is as follows figure 2 Shown; Wherein, ▲ is the removal effect curve of test two Rhodamine B; ■ is the curve of the removal effect of Rhodamine B when no alkali is added. from figure 2 It can be seen that after adding alkali to the solid oxidant, the generation of free radicals in the reaction and the removal of pollutants are obviously promoted. With the increase of time, the remaining rh...

Embodiment 3

[0030] Use alkali to adjust the pH value of the dye lime 7 wastewater to be treated to 11, then add sodium perborate to the water body, stir and react evenly at a temperature of 25°C for 60 minutes, and then complete the decolorization and degradation of the dye wastewater by using the alkali / solid oxidant system Method; wherein, the molar ratio of organic pollutants and solid oxidants in the dye wastewater to be treated is 0.1:12.

[0031] The curve graph of the removal effect of lime 7 and the removal effect of lime 7 when no alkali is added in the present embodiment is as follows image 3 Shown; Wherein, ▲ is the removal effect curve of test two lime 7; ■ is the curve of the removal effect of lime 7 when no alkali is added. from image 3 It can be seen from the figure that after adding alkali to the solid oxidant, the generation of free radicals in the reaction and the removal of pollutants were obviously promoted. With the increase of time, the remaining lime 7 became les...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a multifunctional ether type polycarboxylic acid water reducing agent and a preparation method thereof. A method of decolorizing and degrading dye wastewater by using an alkali / solid oxidizing agent system comprises the following steps of: adjusting the pH value of the dye wastewater to be treated to be 9-13 by using alkali, then adding a solid oxidizing agent, and stirringuniformly and reacting at the temperature of 10-40 DEG C for 10 to 60 minutes. The ultraviolet irradiation, microwave irradiation, ultrasonic cavitation, external electromagnetic field and heating are not needed; and the removal rate of pollutants in the dye wastewater by the solid oxidizing agent can be greatly increased only by adding a small amount of alkali.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for decolorizing and degrading dye wastewater by using an alkali / solid oxidant system. Background technique [0002] In recent years, with the continuous development of printing and dyeing industry and textile industry, its production wastewater has become one of the most important sources of water pollution. my country is currently the world's largest textile producer and exporter. A large amount of chemical dyes need to be added in the printing and dyeing process. The basic raw materials for dye production are benzene series, naphthalene series, anthraquinone, aniline and benzidine compounds, and in the production During the process, it is mostly chelated with metals, salts and other substances, resulting in dye wastewater containing mostly salt, chloride or bromide, slightly acidic or slightly alkaline, metal ions, and sulfur-containing high chemic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F101/30C02F103/30
CPCC02F1/66C02F1/72C02F2101/308C02F2103/30
Inventor 邹景王黛瑶王梦云周真明苑宝玲
Owner HUAQIAO UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com