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

Process for degrading organic fluoride from waste water by photocatalysis

A photocatalytic and fluoride technology, which is applied in chemical instruments and methods, light water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems that affect the practicality of photocatalytic technology, slow reaction speed, and easy aggregation of powder. Achieve fast degradation speed, simple equipment and good effect

Inactive Publication Date: 2003-08-06
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the technology of treating organic wastewater by semiconductor photocatalysis has not been put into practical use on a large scale. The main difficulty is: suspended TiO 2 The powder is easy to coagulate or lose; its absorption spectrum is limited to the ultraviolet range, the light utilization rate is low, and the reaction speed is slow, which affects the practicality of photocatalytic technology

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

Examples

Experimental program
Comparison scheme
Effect test

specific example 1

[0021] In this embodiment, place 4 pieces of flat glass with photocatalytic coating layer in the photocatalytic reactor, keep the photocatalytic plate perpendicular to the light, add 1000mL of waste water containing 40.6mg / L of fluorobenzene, stir magnetically to make the reaction solution uniform, and use 100W After the ultraviolet lamp was used as the light source for 75 minutes, the content of fluorobenzene in the wastewater was 4.0 mg / L, and the degradation rate was 90.2%.

specific example 2

[0023] In this embodiment, place 4 pieces of flat glass with photocatalytic coating layer in the photocatalytic reactor, keep the photocatalytic plate perpendicular to the light, add 1000mL of waste water containing 40.6mg / L of fluorobenzene, stir magnetically to make the reaction solution uniform, and use 100W After the ultraviolet lamp was used as the light source for 30 minutes, the content of fluorobenzene in the wastewater was 16.8mg / L, and the degradation rate was 58.6%.

specific example 3

[0025] In this embodiment, place 4 pieces of flat glass with photocatalytic coating layer in the photocatalytic reactor, keep the photocatalytic plate perpendicular to the light, add 1000mL of waste water containing 40.6mg / L of fluorobenzene, magnetically stir to make the reaction solution uniform, use 15W After the ultraviolet lamp was used as the light source for 180 minutes, the content of fluorobenzene in the wastewater was 18.9 mg / L, and the degradation rate was 53.5%.

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 present invention uses TiO2 or modified TiO2 as photocatalyst, uses acrylic acid modified organosilicon resin as adhesive, uses polyurethane as solidifying agent, makes photocatalytic coating layer which can be solidified at room temp. on the plate glass, places the plate glass coated with photocatalyst coating material into a photocatalytic reactor, under the action of UV ray it can degrade the organic fluoride in waste water. It is characterized by that said described photocatalyst is made of TiO2 whose grain size is 25-100 nm or TiO2 modified by SnO2. Said method can degrade the folloiwng organic fluorides; fluorobenzene, fluorobenzoic acid, fluoromethylbenzene, fluorochlorobenzeneamine, 5-fluorophenylacetone, 2,3,4,5-tetrafluorobenzoic acid, fluconazole, fluoroglycofen-ethyl and others.

Description

technical field [0001] The method for photocatalytically degrading organic fluorides in waste water of the invention belongs to the method for treating pollutants in waste water. Background technique [0002] Due to the excellent performance of organic fluorides in many industrial fields, the production volume and types of organic fluorides are increasing year by year. However, the production process of organic fluorides produces a large amount of industrial wastewater containing organic fluorides, which is a major problem in wastewater treatment and one of the reasons for the deterioration of drinking water sources. Many organic fluorides are difficult to biochemically degrade, and even have toxic effects on microorganisms, affecting the progress of biochemical treatment. Therefore, appropriate pretreatment must be selected to make them easy to biochemically degrade, reduce toxicity to microorganisms or become non-toxic. compound. Although the co...

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
IPC IPC(8): C02F1/32C02F1/58C02F1/72
Inventor 夏明芳张利民王志良张征林尹协东高蓉菁李国平
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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