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Method for degrading organic contaminant catalyzed by ultrasonic wave

A technology for catalytic degradation of organic pollutants, applied in the field of ultrasonic catalytic degradation of organic pollutants, can solve the problems of limited improvement in the efficiency of ultrasonic catalytic degradation of organic matter

Active Publication Date: 2008-07-09
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as reported in the literature, the addition of these single-type catalysts is very limited for the improvement of the efficiency of ultrasonic catalytic degradation of organic matter. Ultrasonic degradation of furfural (a method of ultrasonic and titanium dioxide degradation of furfural

Method used

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  • Method for degrading organic contaminant catalyzed by ultrasonic wave
  • Method for degrading organic contaminant catalyzed by ultrasonic wave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051]Take 10 grams of zirconium dioxide (average particle size: 25 nanometers) and place it in an oven at 150°C for 12 hours; then take 2 grams and disperse it in a 200 ml round bottom flask, add 200 ml of double distilled water, and ultrasonically break it for one hour. Add 31.5 mg of silver nitrate, use 1 mol / liter of chloric acid to adjust the pH value to 3.0, then place in the dark and stir for 30 minutes to achieve adsorption / desorption equilibrium while passing Ar to remove air. 500W xenon lamp was irradiated for 4 hours, and the silver nitrate was converted into elemental nanoparticles and loaded on the zirconia carrier. Centrifuge the catalyst, dry it at 100° C. for 10 hours, and grind it into powder to prepare a nano-silver (average particle size: 3 nm) / zirconia (average particle size: 25 nm) composite solid-phase catalyst.

[0052] The round-bottomed flask contains 1.0 grams of nano-silver / zirconia composite solid-phase catalyst (loading capacity 1.0%, mass fraction...

Embodiment 2

[0055] Take 10 grams of ferric oxide (average particle size: 280 nanometers), put it in an oven and dry it at 150°C for 12 hours; then take 2 grams and disperse it in a 200 ml round bottom flask, add 200 ml of twice distilled water, and ultrasonically break it for one hour. Add 50 mg of potassium chloroplatinate, use 1 mol / liter of chloric acid to adjust the pH value to 3.0, then place in the dark and stir for 30 minutes to achieve adsorption / desorption equilibrium while passing Ar to remove air. The 500W xenon lamp was irradiated for 4 hours, and the potassium chloroplatinate was converted into simple nanoparticles and loaded on the ferric oxide carrier. Centrifuge the catalyst, dry it at 100°C for 10 hours, and grind it into powder to prepare nano-platinum (average particle size 5nm) / ferric oxide (average particle size 280 nm) composite solid-phase catalyst.

[0056] The round bottom flask contains 0.5 gram of nanometer platinum / ferric oxide composite solid-phase catalyst (l...

Embodiment 3

[0059] Take 10 grams of chromium trioxide (average particle size: 165 nanometers), put it in an oven and dry it at 150°C for 12 hours; then take 2 grams and disperse it in a 200 ml round bottom flask, add 200 ml of twice distilled water, and ultrasonically break it for one hour. Add 42 mg HAuCl 4 , using 1 mol / liter of chloric acid to adjust the pH value to 3.0, then placed in the dark and stirred for 30 minutes to achieve adsorption / desorption equilibrium while passing Ar to remove air. 500W xenon lamp irradiation for half an hour, the HAuCl 4 It is converted into simple nanometer particles and loaded on the chromium trioxide carrier. The catalyst was separated by centrifugation, dried at 100°C for 10 hours, and ground into powder to obtain a composite solid-phase catalyst of nano-gold (average particle size: 2nm) / chromium trioxide (average particle size: 165 nm).

[0060] The round-bottomed flask contains 4.0 g of nano-gold / chromium trioxide composite solid-phase catalyst ...

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Abstract

The invention relates to the field of ultrasonic catalysis, in particular to a method of catalyzing and degrading organic pollutants via ultrasound wave in the condition that solid-phase catalyst exists. Oxide compound type solid-phase catalyst loaded with metal nanometer particles and water solution containing the organic pollutants are placed in an ultrasonic generator, and the organic pollutants are led to be degraded and mineralized under ultrasound wave radiation. The invention uses the oxide compound type solid-phase catalyst loaded with metal nanometer particles, which can lead the efficiency of degrading organic pollutants via ultrasound wave to be improved greatly. The method of the invention is capable of being used for treating organic wastewater.

Description

technical field [0001] The invention belongs to the field of ultrasonic catalysis, in particular to a method for ultrasonically catalyzing and degrading organic pollutants in the presence of a solid-phase catalyst. Background technique [0002] Water environment protection is an issue of widespread concern to human society. With the rapid development of my country's national economy, organic wastewater poses a threat to my country's precious water resources. However, using existing biological treatment methods, it is difficult to treat organic wastewater such as azo dyes, cyanide, nitrobenzene, and chlorophenols with poor biodegradability or biological toxicity, and advanced oxidation processes (Advanced Oxidation Process, referred to as AOPs) It can directly mineralize these pollutants or improve the biodegradability of pollutants through oxidation. At the same time, it also has great advantages in the treatment of trace harmful chemicals such as environmental hormones, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/36
Inventor 赵进才王一峰赵丹马万红陈春城
Owner INST OF CHEM CHINESE ACAD OF SCI
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