Iron-based catalyst for enhanced ozone oxidation of organic pollutants and preparation method thereof

A technology for iron-based catalysts and organic pollutants, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, water pollutants, etc., to improve specific surface area, increase utilization rate, and high catalytic activity Effect

Active Publication Date: 2022-03-15
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention provides an iron-based catalyst for strengthening ozone oxidation of organic pollutants, which can efficiently catalyze ozone oxidation of refractory organic pollutants under the condition of low ozone concentration, and realize the removal of refractory organic substances

Method used

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  • Iron-based catalyst for enhanced ozone oxidation of organic pollutants and preparation method thereof
  • Iron-based catalyst for enhanced ozone oxidation of organic pollutants and preparation method thereof
  • Iron-based catalyst for enhanced ozone oxidation of organic pollutants and preparation method thereof

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Experimental program
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Embodiment 1

[0035] The synthesis of embodiment 1 iron-based catalyst

[0036] Soak 200g of zeolite in a ferrous iron salt solution with a concentration of 1.0mol / L, and simultaneously add 0.5mol / L alkaline potassium ferrate solution and 0.2mol / L After stirring the hydrogen peroxide solution at room temperature for 30 minutes, the zeolite was separated, dried in an oven at 80° C. for 12 hours, and cooled to obtain the iron-based catalyst 1.

[0037] A series of characterization tests were carried out on the above iron-based catalysts, including X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). From the results of XRD, it can be seen that compared with the amorphous characteristics of natural zeolite, the material after the above treatment has the typical diffraction peak characteristics of δ-FeOOH and ferrihydrite; it can be seen from the SEM image that after Compared with the surface of zeolite, the iron-based catalyst after treatment has a...

Embodiment 2

[0038] The synthesis of embodiment 2 iron-based catalysts

[0039] Soak 200g of zeolite in a ferrous salt solution with a concentration of 0.5mol / L, and simultaneously add 0.3mol / L alkaline potassium ferrate solution and 0.2mol / L After stirring the hydrogen peroxide solution at room temperature for 30 minutes, the zeolite was separated, dried in an oven at 80° C. for 12 hours, and cooled to obtain the iron-based catalyst 2.

Embodiment 3

[0041] Soak 200g of zeolite in a ferrous iron salt solution with a concentration of 0.75mol / L, and simultaneously add half the same volume of the ferrous ferric salt solution as 0.5mol / L alkaline potassium ferrate solution and 0.2mol / L L of hydrogen peroxide solution was stirred at room temperature for 30 minutes, and the zeolite was separated, dried in an oven at 80°C for 12 hours, and cooled to obtain the iron-based catalyst 3.

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Abstract

The invention provides an iron-based catalyst for strengthening ozone oxidation of organic pollutants. The catalyst can efficiently catalyze ozone oxidation of refractory organic pollutants under the condition of low ozone concentration, and realize the removal of refractory organic substances. It is made of natural zeolite, artificial zeolite or zeolite as the carrier to load active ingredients. The active ingredients include ferrihydrite and δ-iron oxyhydroxide. The mass ratio of ferrihydrite and iron oxyhydroxide is 20~80:20~ 80; The present invention also provides a method for preparing the catalyst and a method for treating wastewater using the catalyst, which can effectively remove antibiotics such as metronidazole that are difficult to degrade in hospital wastewater; at the same time, the present invention also provides disinfection devices for existing hospital wastewater Improvement was made, and a filling layer of iron-based catalyst was installed in the ozone contact tank. Under the premise of not changing the original operating parameters, not only the disinfection of wastewater was realized, but also the decomposition of antibiotics in wastewater was realized.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to an iron-based catalyst for strengthening ozone oxidation of organic pollutants and a preparation method thereof. Background technique [0002] In recent years, antibiotics have been widely used in the treatment of humans and animals, and have played an important role in ensuring human health and promoting the development of animal husbandry. The amount of antibiotics used in my country is very large and the abuse is serious. After antibiotics are absorbed by humans or animals, more than 90% of antibiotics will be directly discharged into the water body in their original form, except for a small part of products that have no antibacterial activity through various metabolic reactions. It is understood that the current water bodies in various fields in my country are seriously polluted by antibiotics, and the main sources of pollution are hospital wastewater and farm wast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745C02F1/78C02F1/72C02F101/30C02F101/34C02F101/38
CPCB01J23/745C02F1/725C02F1/78C02F2101/30C02F2103/003C02F2101/38C02F2101/34C02F2303/04C02F2305/023
Inventor 赵志伟范峻雨刘杰
Owner CHONGQING UNIV
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