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Method for rapidly degrading organic pollutants in water

A technology of organic pollutants and rapid degradation, applied in the field of environmental treatment, can solve the problems of high cost, restricting large-scale popularization and application, low efficiency of composite catalysts, etc., achieve long active life, solve poor catalyst activity and stability, prevent The effect of sintering and bleeding

Inactive Publication Date: 2021-06-29
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies have shown that the combination of titanium dioxide and noble metals can extend the photoresponse range of the material to the visible light region, but the efficiency of the composite catalyst is not high and the cost is high, which seriously restricts the large-scale popularization and application of this method.

Method used

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  • Method for rapidly degrading organic pollutants in water
  • Method for rapidly degrading organic pollutants in water
  • Method for rapidly degrading organic pollutants in water

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: Preparation and characterization of titanium dioxide nanotube-confined palladium catalyst modified by iron oxide:

[0026] The first step, 6 gram titanium dioxide powders join in the polytetrafluoroethylene flask that 200 milliliters of 10mol / L sodium hydroxide solutions are housed, stirred and reacted at 110 ℃ for 48 hours. Then, after the reaction solution was cooled to room temperature, it was washed several times with water, and then the solid was soaked with 0.1mol / L HCl and washed several times with water until the pH was 7. After drying in an oven, the titanium dioxide nanotubes were obtained by calcining in an air atmosphere at 250° C. for 2 hours in a muffle furnace.

[0027] In the second step, 3.3ml of palladium chloride ethanol solution (1.0g / 100ml) was slowly mixed with titanium dioxide nanotubes, and after stirring for 30 minutes, at -0.03~-0.1Mpa, at room temperature, ultrasonically assisted the noble metal Pd Embedded in TiO nanotubes, the...

Embodiment 2

[0029] Embodiment 2: be that the methyl orange aqueous solution of 20ppm is mixed with the ferric oxide modified titanium dioxide nanotube confined palladium catalyst prepared in embodiment 1, add a small amount of H subsequently 2 o 2 , after 30 minutes of adsorption in the absence of light, quickly put the visible light source into the reaction device, start timing, magnetically stir during the reaction, and take samples, filter and measure the absorbance, and calculate the degradation rate of methyl orange. The results are shown in figure 2 , it can be seen that the catalyst system of the present invention can reach a degradation rate of more than 90% within 10 minutes.

Embodiment 3

[0031] Embodiment 3: Operating condition is identical with embodiment 2, and the initial concentration of methyl orange is adjusted to 100ppm, measures the degradation rate of methyl orange under the high concentration condition as a function of time, and the results are shown in Figure 4 , it can be seen that the catalytic system of the present invention can also achieve a faster degradation rate for high-concentration pollutants.

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Abstract

The invention discloses a method for rapidly degrading organic pollutants in water. The method utilizes a high-activity and high-stability Fenton or Fenton-like material modified titanium dioxide nanotube confined active component catalyst to rapidly degrade the organic pollutants in water under the conditions of hydrogen peroxide and visible light through photocatalysis-Fenton catalysis interaction, and is simple to operate. The catalyst is high in activity and good in cycle performance, and the problems that in the prior art, the catalyst is poor in activity and stability, and secondary pollution is generated are solved.

Description

Technical field: [0001] The invention relates to the field of environmental management, in particular to a method for rapidly degrading organic pollutants in water. Background technique: [0002] With the rapid development of the chemical industry and the continuous growth of the world population, the problems of energy shortage and environmental pollution are becoming more and more serious. A large amount of harmful wastewater is continuously discharged into nature, causing the deterioration of the ecological environment and seriously threatening the living environment and health of human beings. . Studies have shown that the Fenton oxidation method can be used to quickly degrade organic matter because it can generate hydroxyl radicals with strong oxidative properties, but this method requires continuous supplementation of Fenton reagent and will produce a large amount of iron hydroxide precipitation to cause secondary pollution, which is also limited. its practical applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/72B01J23/89C02F101/30
CPCC02F1/30C02F1/722C02F1/725B01J23/8906B01J23/002C02F2101/30C02F2305/026C02F2305/10
Inventor 李新军彭全明吴梁鹏
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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