A method of degrading organic pollutants in waste water through a Fenton-like process

A technology for degrading organic pollutants and sewage, applied in the field of degrading organic pollutants, can solve the problems of secondary pollution, narrow effective pH range, low activity and stability, etc., and achieve good recycling effect

Inactive Publication Date: 2016-06-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, with the development of industry, the discharge of industrial wastewater, pesticides, and domestic sewage has caused serious water pollution problems. These sewages contain a large amount of toxic and harmful organic pollutants. If they are not degraded to a certain discharge standard for discharge, they will serious burden on the environment
At present, the traditional Fenton reaction uses ferric ions to catalyze hydrogen peroxide to generate active species such as hydroxyl to degrade organic pollutants. This method has a narrow effective pH range (2-4), and iron ion precipitation causes secondary pollution. limits
A series of Fenton-like reactions have been derived from this. The iron oxide-H 2 o 2 The Fenton process has the disadvantages of low utilization efficiency, low activity and stability of iron species

Method used

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  • A method of degrading organic pollutants in waste water through a Fenton-like process
  • A method of degrading organic pollutants in waste water through a Fenton-like process
  • A method of degrading organic pollutants in waste water through a Fenton-like process

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Using Fe-CoPBAs-H 2 o 2 / PMS Fenton-like reaction system to degrade RhB in simulated sewage. Take Fe 3 [Co(CN) 6 ] 2 12H 2 O0.2g was added to 50mL of simulated wastewater, wherein the concentration of RhB was 12mgL -1 , after stirring for 30 min, add 20 μL H 2 o 2 (12M), start the reaction. In the absence of light, the degradation efficiency of RhB can reach 95% in 30 minutes; under the irradiation of visible light (MAX-303 xenon lamp, add a 400nm filter to filter out ultraviolet light), the degradation efficiency of RhB can reach 100% in 20 minutes. %.

Embodiment 2

[0021] Fe-CoPBAs-H 2 o 2 / PMS-like Fenton reaction system for degrading RhB in simulated sewage compared with other Fenton reaction systems. Experimental conditions: catalyst concentration 0.2g / L, RhB concentration 12mg / L, H 2 o 2 An aqueous solution with a concentration of 4mmol / L, pH=4.8, irradiated with visible light from a MAX-303 xenon lamp. Its degradation efficiency of RhB is much higher than that of iron oxide-H 2 o 2 Reaction system, and PB-H 2 o 2 Fenton reaction system.

Embodiment 3

[0023] to Fe-CoPBAs-H 2 o 2 Investigation of the effect of different simulated sewage pH on the activity of / PMS-like Fenton reaction system. Experimental conditions: catalyst concentration 0.2g / L, RhB concentration 12mg / L, H 2 o 2 Concentration of 4mmol / L aqueous solution, MAX-303 xenon lamp visible light irradiation. By changing the initial pH of the reaction and simulating sewage with different pH, it was found that it has a good degradation effect on RhB with different pH. When the pH is between 2 and 9, the degradation efficiency of RhB can reach 100% within 30 minutes. When pH=10.4, the degradation efficiency of RhB can reach 84% within 30 minutes.

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Abstract

The invention provides a novel method of treating organic pollutants in waste water through an iron hexacyanocobaltate-H2O2 / PMS Fenton-like process. The method includes adding iron hexacyanocobaltate (Fe-Co PBAs) and H2O2 or potassium peroxymonosulfate (PMS) into the waste water to trigger a Fenton-like reaction so as to generate a large amount of free radicals (hydroxy, superoxide radicals or singlet oxygen) which can be used for degrading the organic pollutants in the waste water. The Fenton-like process (Fe-Co PBAs-H2O2 / PMS) is simple, feasible, capable of recycle and reutilization, and is extremely high in degradation efficiency and mineralization efficiency for the organic pollutants.

Description

technical field [0001] The present invention relates to utilizing a kind of Fe-CoPBAs-H 2 o 2 / PMS Fenton-like process for degrading organic pollutants. Background technique [0002] In recent years, with the development of industry, the discharge of industrial wastewater, pesticides, and domestic sewage has caused serious water pollution problems. These sewages contain a large amount of toxic and harmful organic pollutants. If they are not degraded to a certain discharge standard for discharge, they will serious burden on the environment. At present, the traditional Fenton reaction uses ferric ions to catalyze hydrogen peroxide to generate active species such as hydroxyl to degrade organic pollutants. This method has a narrow effective pH range (2-4), and iron ion precipitation causes secondary pollution. limits. A series of Fenton-like reactions have been derived from this. The iron oxide-H 2 o 2 The Fenton process has the disadvantages of low iron species utilizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/28C02F1/30C02F101/30
Inventor 李旭宁王军虎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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