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Method for performing combined catalytic degradation on perfluorooctane sulfonate in water by using visible light-electricity

A technology for catalytic degradation of perfluorooctane sulfonic acid, applied in chemical instruments and methods, electrochemical water/sewage treatment, light water/sewage treatment, etc., can solve problems such as limiting photocatalytic degradation efficiency, and achieve low energy consumption , low current density, simple operation

Inactive Publication Date: 2015-05-20
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the degradation efficiency of the photocatalytic reaction mainly depends on the recombination rate of photogenerated electrons and holes. In general photocatalytic reactions, the high recombination rate of photogenerated electrons and holes greatly limits the photocatalytic degradation efficiency.

Method used

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  • Method for performing combined catalytic degradation on perfluorooctane sulfonate in water by using visible light-electricity
  • Method for performing combined catalytic degradation on perfluorooctane sulfonate in water by using visible light-electricity
  • Method for performing combined catalytic degradation on perfluorooctane sulfonate in water by using visible light-electricity

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Use the electrochemical workstation to control the current density of the reaction. In the constant current mode, select the current density to be 0.25mA / cm 2 The reaction experiment was carried out, the reaction time was 120min, the distance between the plates was 20mm, and the electrolyte was 10mmol L -1 NaClO 4 .

Embodiment 2

[0036] Use the electrochemical workstation to control the current density of the reaction. In the constant current mode, select the current density to be 0.5mA / cm 2 The reaction experiment was carried out, the reaction time was 120min, the distance between the plates was 20mm, and the electrolyte was 10mmol L -1 NaClO 4 .

Embodiment 3

[0038] Use the electrochemical workstation to control the current density of the reaction. In the constant current mode, select the current density to be 1.0mA / cm 2 The reaction experiment was carried out, the reaction time was 120min, the distance between the plates was 20mm, and the electrolyte was 10mmol L -1 NaClO 4 .

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Abstract

The invention discloses a method for performing combined catalytic degradation on perfluorooctane sulfonate in the water by using visible light-electricity and discloses a novel method for removing the perfluorooctane sulfonate in the water. The visible light is used as a light source and is combined with an electrochemical technology so that the removing efficiency is increased. A suspended light-catalyzed reaction device is adopted by the technology, and a catalyst is dispersed in the solution and is subjected to lucifugal ultrasound process for 5 minutes before the reaction so that the uniform dispersion and absorption effect of the catalyst can be realized. By contrasting the experiment of independently using a photochemical and electrocatalysis technology to remove the perfluor compound in the water, the coupling technology is capable of effectively improving the removing effect of the perfluor compound. The method aims at providing a new technology for removing the perfluorooctane sulfonate in the water.

Description

technical field [0001] The present invention relates to a method for catalytically degrading perfluorooctane sulfonic acid in water by visible light-electricity combination. Catalytic removal of target pollutants mainly involves a new method for the removal of perfluorinated compounds in water. Background technique [0002] As an important industrial raw material, perfluorochemicals (PFCs) have oleophobic and hydrophobic properties, and have been widely used in textiles, papermaking, pesticides, shampoos and other industries in recent decades. activator. Among the various perfluorinated compounds, the two most typical are perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA), which are also the final conversion products of various perfluorinated compounds. At present, PFOS has been included in the priority control compound list of the OSPAR Convention (Northeast Atlantic Environmental Protection Committee). In 2005, the United Nations Environment Program i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/30C02F101/36
CPCC02F9/00C02F1/30C02F1/46C02F2101/40
Inventor 牛军峰包月平殷立峰
Owner BEIJING NORMAL UNIVERSITY
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