Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A method for degrading malachite green wastewater

A malachite green and wastewater technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of long reaction time, difficult reaction conditions, and consumption, and reduce electrolysis. The effect of energy consumption, COD reduction and degradation time reduction

Active Publication Date: 2016-07-13
ZHEJIANG SHUREN UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are prone to produce toxic phenols, anilines and ketones in the degradation process, the degradation process is complicated, and the reaction conditions are difficult to control. ), consumes a large amount of energy

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 degrading malachite green wastewater
  • A method for degrading malachite green wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Settling malachite green waste water grid;

[0018] (2) Heat the malachite green wastewater treated in step 1 to 15°C, adjust the pH to 4, and filter after 1 hour; the Fe in the wastewater 2+ , Fe 3+ , Ca 2+ Wait to form precipitate, and be filtered off, and the filtrate obtained by filtering is processed in the next step;

[0019] (3) Use the filtrate treated in step 2 as the electrolyte, use a titanium electrode as the reducing electrode, use a saturated calomel electrode as the reference electrode, and use a platinum electrode as the working electrode; reduce 5 Hours, the malachite green wastewater undergoes an electrochemical reduction reaction to form a leuco malachite green precipitate. Filter the reduced electrolyte to obtain leuco malachite green crystals;

[0020] (4) The filtered wastewater was electrochemically oxidized again. The oxidation electrode used was a BDD electrode, a saturated calomel electrode was used as a reference electrode, and a plati...

Embodiment 2

[0023] (1) Settling malachite green waste water grid;

[0024] (2) Heat the malachite green wastewater treated in step 1 to 15°C, adjust the pH to 6, and filter after 1 hour; the Fe in the wastewater 2+ , Fe 3+ , Ca 2+ Wait to form precipitate, and be filtered off, and the filtrate obtained by filtering is processed in the next step;

[0025] (3) Use the filtrate treated in step 2 as the electrolyte, use a titanium electrode as the reducing electrode, use a saturated calomel electrode as the reference electrode, and use a platinum electrode as the working electrode; reduce 5 Hours, the malachite green wastewater undergoes an electrochemical reduction reaction to form a leuco malachite green precipitate. Filter the reduced electrolyte to obtain leuco malachite green crystals;

[0026] (4) Electrochemically oxidize the reduced wastewater again. The oxidation electrode used is a BDD electrode, a saturated calomel electrode is used as a reference electrode, and a platinum elec...

Embodiment 3

[0029] (1) Settling malachite green waste water grid;

[0030] (2) Heat the malachite green wastewater treated in step 1 to 25°C, adjust the pH to 7, and filter after 1 hour; the Fe in the wastewater 2+ , Fe 3+ , Ca 2+ Wait to form precipitate, and be filtered off, and the filtrate obtained by filtering is processed in the next step;

[0031] (3) Use the filtrate treated in step 2 as the electrolyte, use a graphite electrode as the reduction electrode, use a saturated calomel electrode as the reference electrode, and use a platinum electrode as the working electrode; reduce 5 Hours, the malachite green wastewater undergoes an electrochemical reduction reaction to form a leuco malachite green precipitate. Filter the reduced electrolyte to obtain leuco malachite green crystals;

[0032] (4) Electrochemically oxidize the reduced wastewater again. The oxidation electrode used is a BDD electrode, a saturated calomel electrode is used as a reference electrode, and a platinum ele...

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 method for degrading the malachite green waste water. The malachite green is degraded through oxidation after reduction, the malachite green can be reduced into the leucomalachite green to be precipitated in a short five hours, and accordingly a COD (Chemical Oxygen Demand) value of the waste water is reduced, meanwhile the chemical raw material leucomalachite green is obtained, malachite green large molecules are decomposed into small molecules of pollutants, and the further degradation of the malachite green is facilitated and the malachite green waste water which is not fully degraded is oxidized by an oxidation method and accordingly the degradation time is reduced and the energy consumption of the electrolysis is reduced.

Description

technical field [0001] The invention belongs to the field of environmental protection, in particular to a method for degrading malachite green wastewater. Background technique [0002] Malachite green is an organic dye, easily soluble in water, and its aqueous solution is blue-green. It is widely used in industry, mainly used for dyeing cotton, wool, linen products, leather, ceramic products, etc.; in addition, malachite green is harmful to fish parasites. It has a remarkable killing effect on mold and fish eggs, so it is also widely used in aquaculture. However, malachite green can produce toxicity to fish and shrimp in water bodies, and can cause teratogenic, carcinogenic, and mutagenic effects on mammals and humans through the food chain, and can promote tumor growth. Bioaccumulation in ecosystems has implications for both the environment and human health. Therefore, processing malachite green wastewater has become a top priority. [0003] The currently researched meth...

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): C02F9/06
Inventor 王莉王俊波
Owner ZHEJIANG SHUREN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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