Enzyme electric coupling catalyzation for treating waste water containing phenol, aromatic amine and azo-dye

An azo dye, aromatic amine technology, applied in chemical instruments and methods, electrochemical water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of poor economic feasibility, high cost, and high treatment cost, and achieve The effect of low oxygen reduction overpotential, many times of use, and high current efficiency

Inactive Publication Date: 2007-06-20
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coagulation treatment is difficult to meet the standard, and it is often used as pretreatment. At the same time, the treatment effect on water-soluble phenols and hydrophilic dyes is very poor
Although adsorption, extraction and membrane separation have the advantage of being able to recover materials, the treatment costs are relatively high due to the desorption regeneration of the adsorbent, the recovery of the extractant and membrane pollution, and are more suitable for the recovery of some high-value organic matter.
When organics have little recycling value or complex composition, their economic viability is greatly reduced
For example, Chinese patent CN1403382A has reported a method of utilizing macroporous resin to adsorb and treat 2-methyl-4-chlorophenoxyacetic acid production wastewater, which can recycle o-cresol, but this method is aimed at specific 2-methyl-4-chloro Phenoxyacetic acid production wastewater is feasible, but it will be difficult to extend to other wastewater containing phenols, aromatic amines an

Method used

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  • Enzyme electric coupling catalyzation for treating waste water containing phenol, aromatic amine and azo-dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The pyrolytic graphite block was cut into many cuboids of 4 mm × 5 mm × 5 mm, smoothed on metallographic sandpaper, and used as the base electrode. Add 50 mg of carbon nanotubes with a diameter of 15 to 30 nm into the beaker, and then add 100 mg of dodecyldimethylammonium bromide and 37.5 mL of deionized water. Ultrasonic dispersion was carried out for 10 minutes to obtain a uniformly dispersed and stable suspension. The polished pyrolytic graphite matrix electrode was placed in the carbon nanotube suspension and vibrated in a shaker for 3 hours at a speed of 120 rpm. Take it out and let it dry naturally. Then immerse in 2 mg / mL hemoglobin solution for 2 hours. The cathode I for treating waste water containing phenol, aromatic amine and azo dye is made.

[0024] Fill the negative electrode I into the cathodic chamber of the electrolytic reactor shown in the accompanying drawing as the negative electrode in the form of packing, use a graphite electrode as the anode, a...

Embodiment 2

[0027] The pyrolytic graphite block was cut into many cuboids of 10mm×10mm×10mm, polished smooth on metallographic sandpaper, and used as the substrate electrode. Add 50 mg of multi-walled carbon nanotubes with a diameter of 30-40 nm into the beaker, and then add 25 mg of dihexadecyl phosphate and 150 mL of deionized water. Ultrasonic dispersion was carried out for 20 minutes to obtain a uniformly dispersed and stable suspension. The polished graphite matrix electrode was placed in the carbon nanotube suspension and vibrated in a shaker for 1 hour at a speed of 150 rpm. Take it out and let it dry naturally. Then immerse in 1 mg / mL HRP solution for 6 hours. Made into cathode II for treating wastewater containing phenol, aromatic amine and azo dyes.

[0028] Fill the negative electrode II into the cathode chamber of the electrolytic reactor shown in the accompanying drawing as the negative electrode of the packing form, use the graphite electrode as the anode, and the saturat...

Embodiment 3

[0031]The pyrolytic graphite block was cut into many cuboids of 10mm×10mm×5mm, polished smooth on metallographic sandpaper, and used as the base electrode. Add 50 mg of multi-walled carbon nanotubes with a diameter of 5 to 15 nm into a beaker, and then add 50 mg of dioctadecyldimethylammonium bromide and 50 mL of deionized water. Ultrasonic dispersion was carried out for 5 minutes to obtain a uniformly dispersed and stable suspension. The polished graphite matrix electrode was placed in the carbon nanotube suspension and vibrated in a shaker for 6 hours at a speed of 80 rpm. Take it out and let it dry naturally. Immerse again in 10 mg / mL myoglobin solution for 1 hour. Made as cathode III for treating wastewater containing phenols, aromatic amines and azo dyes.

[0032] Fill the negative electrode III into the cathode chamber of the electrolytic reactor shown in the accompanying drawing as the negative electrode in the form of packing, use a graphite electrode as the anode, ...

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Abstract

An enzyme electric couple catalyzing method for treating waste water containing phenol, aromatic amine and azo-dye is carried out by fixing horse-radish peroxidase or analog enzyme with enzyme activity on grinded pyrolyzed graphite electrode surface by surface activator and carboxy-carbon nano-pipe, making into solid-carried enzyme or analog enzyme electrode, taking solid-carried enzyme or analog enzyme electrode as cathode, taking graphite electrode as anode, pumping waste water containing phenol, aromatic amine and azo-dye into cathode chamber, inducing oxygen and air into cathode chamber to saturate, controlling cathode electric potential at -1.00--0.500V vs.SCE by constant potentiometer and constant-potential electrolyzing. It has fast degradation speed and high current efficiency.

Description

field of invention [0001] The invention relates to the treatment of wastewater containing phenols, aromatic amines and azo dyes, in particular to a method for decomposing wastewater containing phenols, aromatic amines and azo dyes through catalytic oxidation with enzyme electrical coupling. Background technique [0002] Phenols, aromatic amines and azo dyes are important chemicals widely used in industrial and agricultural production, with large emissions and serious pollution. They have high stability and high biological toxicity, which seriously threaten human health. These pollutants are generally difficult to biodegrade, and traditional biological treatment is difficult to be effective. The use of enzymes instead of microorganisms does not require the growth conditions required by microorganisms, and the drug resistance is also greatly improved. The enzymatic method mainly uses horseradish catalase to catalyze the oxidation of phenols, aromatic amines and azo dyes with...

Claims

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Application Information

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IPC IPC(8): C02F1/46C02F101/30
Inventor 李玉平曹宏斌张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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