Method for removing cyanide through basic Fenton reaction by utilizing ultrasonic catalysis

A Fenton reaction and ultrasonic technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as insufficient utilization, save investment and speed up reaction efficiency , the effect of improving the reaction efficiency

Inactive Publication Date: 2015-03-04
SUZHOU FUQINUO WATER TREATMENT EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Known existing technologies such as: Application No.: 201310678092.4 and 201210286680.9 respectively provide the method of ultrasonic wave and Fenton reaction synergistic treatment of wastewater, which is proposed in 201310678092.4 The Fenton reaction and the ultrasonic crushing reaction are carried out at the same time. The method proposed in the 201210286680.9

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for removing cyanide by an alkaline Fenton reaction catalyzed by ultrasonic waves, the specific steps are as follows: (1) adding a sufficient amount of activated carbon powder to the waste water, the amount of the activated carbon powder added is 0.7% of the weight of the waste water, and the activated carbon powder is The powder is granular activated carbon powder or columnar activated carbon powder; (2) After the activated carbon powder absorbs a large amount of impurities in water, filter the waste water and then inject it into the ultrasonic reactor; (3) carry out ultrasonic crushing reaction, and the sound energy density of the ultrasonic wave is 0.1w / m 3 ; (4) After 20-40 minutes of reaction, add ferrous ion salt, H 2 o 2 , adjust the pH value to 8, the ferrous ion salt is FeCl 2 or FeSO 4 , the put Fe 2+ with H 2 o 2 The molar ratio is 900:1, copper oxide is added as a catalyst, and the copper oxide is Cu 2 Mixture of O and CuO, Cu 2 O:CuO is ...

Embodiment 2

[0034] A method for removing cyanide by an alkaline Fenton reaction catalyzed by ultrasonic waves, the specific steps are as follows: (1) adding a sufficient amount of activated carbon powder to the waste water, the amount of the activated carbon powder added is 0.9% of the weight of the waste water, and the activated carbon powder is The powder is granular activated carbon powder or columnar activated carbon powder; (2) After the activated carbon powder absorbs a large amount of impurities in water, filter the waste water and then inject it into the ultrasonic reactor; (3) carry out ultrasonic crushing reaction, and the sound energy density of the ultrasonic wave is 0.2w / m 3 ; (4) After 20-40 minutes of reaction, add ferrous ion salt, H 2 o 2 , adjust the pH value to 9, the ferrous ion salt is FeCl 2 or FeSO 4 , the put Fe 2+ with H 2 o 2 The molar ratio is 800:1, and copper oxide is added as a catalyst, and the copper oxide is Cu 2 Mixture of O and CuO, Cu 2 O:CuO ...

Embodiment 3

[0038] A method for removing cyanide by an alkaline Fenton reaction catalyzed by ultrasonic waves, the specific steps are as follows: (1) adding a sufficient amount of activated carbon powder to the waste water, the amount of the activated carbon powder added is 1.1% of the weight of the waste water, and the activated carbon powder is The powder is granular activated carbon powder or columnar activated carbon powder; (2) After the activated carbon powder absorbs a large amount of impurities in water, filter the waste water and then inject it into the ultrasonic reactor; (3) carry out ultrasonic crushing reaction, and the sound energy density of the ultrasonic wave is 0.3w / m 3 ; (4) After 20-40 minutes of reaction, add ferrous ion salt, H 2 o 2 , adjust the pH value to 10, the ferrous ion salt is FeCl 2 or FeSO 4 , the put Fe 2+ with H 2 o 2 The molar ratio is 1000:1, and copper oxide is added as a catalyst, and the copper oxide is Cu 2 Mixture of O and CuO, Cu 2 O:Cu...

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Abstract

The invention relates to a method for removing cyanide through a basic Fenton reaction by utilizing ultrasonic catalysis. The method comprises the following specific steps: (1) adding an enough amount of activated carbon powder into waste water, wherein the addition amount of the activated carbon powder is 0.7 weight percent of the weight of the waste water; (2) after the activated carbon powder adsorbs a great number of impurities in the water, filtering the waste water, and then injecting the waste water into an ultrasonic reactor; (3) performing ultrasonic crushing reaction, wherein the sound energy density of an ultrasonic wave is 0.1-0.3 w/m<3>; (4) after the reaction is performed for 20-40 minutes, adding ferrous ion salt and H2O2 into the ultrasonic reactor, adjusting the PH value to be 8-10, adding a copper oxide as a catalyst, and performing stirring; (5) after the stirring is performed for 2-3 hours, performing sedimentation after the reaction is completed so as to separate the solid liquid and treat the waste water. The method has the advantage that the cyanide in sewage can be more effectively removed by performing ultrasonic treatment and then adding the copper oxide into the basic Fenton reaction.

Description

technical field [0001] The invention relates to the basic Fenton reaction, in particular to a method for removing cyanide through the basic Fenton reaction catalyzed by ultrasonic waves. Background technique [0002] In the treatment of water resources and environment, wastewater can be treated by ultrasonic waves. The cavitation effect of ultrasonic waves provides the possibility of degrading harmful organic substances in water, so that the purpose of ultrasonic sewage treatment can be realized. In the process of sewage treatment, ultrasonic cavitation has a strong ability to degrade organic matter, and the degradation speed is very fast. The high energy generated by the collapse of ultrasonic cavitation bubbles is enough to break chemical bonds, and the collapse of cavitation bubbles produces hydroxyl groups ( Oh + ) and hydrogen radicals (H - ), and the oxidation reaction with organic matter can convert harmful organic matter in water into CO 2 、H 2 O, inorganic ions...

Claims

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Application Information

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IPC IPC(8): C02F9/08
Inventor 吴彦
Owner SUZHOU FUQINUO WATER TREATMENT EQUIP
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