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Photo-Fenton oxidation catalyst as well as preparation method and application thereof

A Fenton oxidation and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problems of unsatisfactory treatment effect, high degradation efficiency, unpredictable catalytic effect, etc. The effect of low production cost, good stability, large specific surface area and specific volume

Inactive Publication Date: 2019-08-23
南京化学工业园环保产业协同创新有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst is not ideal for the electrochemical treatment of refractory organic wastewater, and it is not as good as the metal-modified catalyst on the basis of acid modification for the degradation of acetophenone.
Moreover, the catalyst in this patent is used for electrochemical treatment of wastewater, not for photo-Fenton catalytic oxidation treatment of industrial organic wastewater in the presence of hydrogen peroxide and ultraviolet light. Based on the specificity of the catalyst, it is unpredictable 201810307992.0 What kind of modification can the catalyst in the photo-Fenton catalytic oxidation treatment of industrial organic wastewater play an ideal catalytic effect?

Method used

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  • Photo-Fenton oxidation catalyst as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Select the dewatered dry sludge from a municipal sewage plant, knead the dry sludge and dry it in an oven at 105°C to a constant weight, then put it in a crusher and crush it for 60 seconds. The crushed particles are obtained through a 120 mesh screen. Original sludge with uniform particles;

[0035] (2) Put the sieved sludge sample obtained in step (1) into a tube furnace for calcination, at 500mL / minN 2 In the atmosphere, the calcining temperature is 600°C, calcining for 4 hours, and cooling to room temperature.

[0036] (3) Take 1g of the sludge calcined in step (2), and add 20mL of 6mol / LH to 1g of sludge. 2 SO 4 For surface modification, control the modification temperature to -20°C and the soaking time to 24h. After soaking, the modified sludge peat is washed with pure water until the effluent pH is neutral, and then dried in an oven at a temperature of 30°C for 12 hours to obtain the required catalyst.

[0037] (4) The catalyst is used to treat ciprofloxacin wastew...

Embodiment 2

[0039] (1) Select the dewatered dry sludge from a municipal sewage plant, knead the dry sludge and dry it in an oven at 105°C to a constant weight, then put it in a crusher and crush it for 60 seconds. The crushed particles are obtained through a 120 mesh screen. Original sludge with uniform particles;

[0040] (2) Put the sieved sludge sample obtained in step (1) into a tube furnace for calcination, at 500mL / minN 2 In the atmosphere, the calcining temperature is 600°C, calcining for 4 hours, and cooling to room temperature.

[0041] (3) Take 1g of the sludge calcined in step (2), and add 20mL of 3mol / LH to 1g of sludge. 2 SO 4 For surface modification, control the modification temperature to -20°C and the soaking time to 24h. After soaking, the modified sludge is washed with pure water until the pH of the effluent is neutral, and then dried in an oven at a temperature of 30°C for 12 hours to obtain the required catalyst.

[0042] (4) The catalyst is used to treat ciprofloxacin wast...

Embodiment 3

[0044] (1) Select the dewatered dry sludge from a municipal sewage plant, knead the dry sludge and dry it in an oven at 105°C to a constant weight, then put it in a crusher and crush it for 60 seconds. The crushed particles are obtained through a 120 mesh screen. Original sludge with uniform particles;

[0045] (2) Put the sieved sludge sample obtained in step (1) into a tube furnace for calcination, at 150mL / minN 2 In the atmosphere, the calcining temperature is 500°C, calcining for 6 hours, and cooling to room temperature.

[0046] (3) Take 1g of the sludge calcined in step (2), and add 10mL of 6mol / LH to 1g of sludge. 2 SO 4 And 10mL of 6mol / LHNO 3 Place in the refrigerator for surface modification, control the modification temperature at 0°C, and the soaking time at 24h. After soaking, the modified sludge is washed with pure water until the pH of the effluent is neutral, and then dried in an oven at a temperature of 30°C for 12 hours to obtain the required catalyst.

[0047] (4)...

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Abstract

The invention provides a photo-Fenton oxidation catalyst as well as a preparation method and application thereof. The efficient photo-Fenton oxidation catalyst is prepared by taking urban sludge charcoal as a carrier and carrying out surface chemical modification through acids including HCl, H2SO4, HNO3, H3PO4 and the like, with the assistance of ultrasonic or microwave physical modification. Thepreparation method for the catalyst is simple and convenient, low in cost and mature in technology; and under a photo-Fenton condition, the catalyst has a relatively high removal rate on ciprofloxacin, so that the popularization of heterogeneous photo-Fenton in industrial application of treating antibiotic wastewater is facilitated.

Description

Technical field [0001] The invention belongs to the field of water treatment technology and environmental functional materials, and relates to a catalyst based on urban sewage peat, modified by surface acid and using surface transition metals as active components, and a preparation method thereof, and is used for catalyzing Fenton treatment of organic wastewater. Background technique [0002] With the development of cities, the number of urban sewage is increasing day by day, and the treatment of urban sewage is becoming more and more urgent. Among them, antibiotics are the most difficult to treat in sewage. Fluoroquinolone antibiotics are the most important antibiotics in sewage, and ciprofloxacin and ofloxacin are two important fluoroquinolone antibiotics. Antibiotics have strong antibacterial power and are difficult to decompose. my country is a major producer of antibiotics, and antibiotics are widely used in clinical medicine, animal husbandry and skin care products. As fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053B01J27/25C02F1/72C02F101/38C02F103/34
CPCB01J27/053B01J27/25C02F1/722C02F1/725C02F2101/38C02F2103/343C02F2305/026
Inventor 于杨孙一斐黄菲姚文鹰秦琨吴彪王明秀何益得张永军徐炎华
Owner 南京化学工业园环保产业协同创新有限公司
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