Method for degrading pentadecafluorooctanoic acid or perfluorooctane sulfonate through irradiation

A technology of perfluorooctane sulfonic acid and perfluorooctanoic acid, which is applied in chemical instruments and methods, light water/sewage treatment, water pollutants, etc., can solve the problems of high cost, inconvenient use, poor removal rate, etc. The effect of fast reaction rate, fast degradation efficiency and wide applicability

Inactive Publication Date: 2016-11-09
SHANGHAI UNIV
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing methods for removing antidepressants in water bodies have high cost, poor removal rate and inconvenient use
Therefore, the research on the degradation of perfluorinated compounds by elec

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
  • Method for degrading pentadecafluorooctanoic acid or perfluorooctane sulfonate through irradiation
  • Method for degrading pentadecafluorooctanoic acid or perfluorooctane sulfonate through irradiation

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example one:

[0023] In this embodiment, see figure 1 , A method of using radiation to degrade PFOA or PFOS in water. At room temperature of 25℃, take 10 mL of PFOA and PFOA with an initial concentration of 20 mg / L as For the polluted water body to be treated, adjust the pH of the polluted water body to be treated to a series of polluted water samples to be treated with 3, 5, 7, 9, 11, 13 respectively; using electron beam irradiation, place the polluted water samples to be treated in the Irradiation is carried out under the electron beam generated by the electron accelerator, and the polluted water body to be treated containing PFOA or PFOS passes through the electron accelerator irradiation device at an average speed. The process parameters of the electron beam irradiation method are controlled as follows: accelerator accelerates electrons The energy is 1.8 MeV, the electron beam intensity is not higher than 10 mA, the processing time is 60-120 seconds, and the irradiat...

Example Embodiment

[0026] Embodiment two:

[0027] This embodiment is basically the same as the first embodiment, and the special features are:

[0028] In this embodiment, see figure 2 , A method of using radiation to degrade PFOA or PFOS in water. At room temperature of 25℃, take 10 mL of PFOA and PFOA with an initial concentration of 20 mg / L as The polluted water body to be treated uses the electron beam irradiation method, and the polluted water body to be treated containing PFOA or PFOS passes through the electron accelerator irradiation device at an average speed. The process parameters of the electron beam irradiation method are controlled as follows: accelerator accelerates electrons The energy is 1.8 MeV, the electron beam intensity is not higher than 10 mA, the processing time is 60-120 seconds, and the irradiation dose is 100-500 kGy;

[0029] In this embodiment, when the electron beam irradiation method is used to treat the polluted water body containing PFOA or PFOS, any one of the foll...

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 relates to a method for degrading pentadecafluorooctanoic acid or perfluorooctane sulfonate through irradiation. The method includes the specific steps that a 20 mg/L pentadecafluorooctanoic acid aqueous solution and a 20 mg/L perfluorooctane sulfonate aqueous solution are prepared respectively, the pH value is adjusted to be 3-13, nitrogen and oxygen are introduced or a tert butyl alcohol solution is added, and the mixture is irradiated by electron beams; the energy of accelerated electrons of an accelerator is 1.8 MeV, the intensity of electronic beam current is 0-10 mA, processing time is 60-120 s, and irradiation dose is 100-500 kGy. The method has the advantages that degradation efficiency is high, reaction speed is high, generated radicals are high in oxidization and reduction performance, the applicability range is wide, controllability is high, the method can be matched with other processing technologies in use so as to reduce cost and meet processing requirements, and the method is an efficient energy-saving water treatment technology. By treating pentadecafluorooctanoic acid or perfluorooctane sulfonate in water through the electron beam irradiation method, quick degradation and effective defluorination can be achieved, and application prospects are good.

Description

technical field [0001] The invention relates to a method for treating organic compound sewage, in particular to a method for treating sewage containing perfluorinated compounds, which is applied in the technical fields of nuclear technology application, water treatment and environmental protection. Background technique [0002] Because perfluorinated compounds are hydrophobic, oleophobic, thermally stable, chemically stable and surface active, they are widely used in textiles, chemicals, electronics, pharmaceuticals, aviation, electroplating and many other fields. Perfluorooctane sulfonate and perfluorooctanoic acid, as the two most typical types of perfluorinated compounds, have been widely used in the manufacture of fire extinguishing agents, cleaning agents, additives, pesticides and other products. While perfluorinated compounds have been widely used, they have also brought many negative environmental problems, among which the pollution problem in the water environment i...

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): C02F1/30C02F1/72
CPCC02F1/305C02F1/72C02F1/722C02F2101/36C02F2101/40
Inventor 徐刚马思涵孙瑞臧超毛雯李旭吴明红
Owner SHANGHAI 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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap