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

A technology for iron-based catalysts and organic pollutants, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, water pollutants, etc., to achieve improved utilization, simple methods, and improved ratio The effect of surface area

Active Publication Date: 2019-08-02
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 strengthening ozone oxidation of organic pollutants and preparation method thereof
  • Iron-based catalyst for strengthening ozone oxidation of organic pollutants and preparation method thereof
  • Iron-based catalyst for strengthening ozone oxidation of organic pollutants and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

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

[0036] Soak 200g of zeolite in a ferrous salt solution with a concentration of 1.0 mol / L, and add 0.5 mol / L of alkaline potassium ferrate with the same volume as the ferrous salt while stirring continuously The solution and 0.2 mol / L hydrogen peroxide solution were stirred at room temperature for 30 minutes, and then 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 surfa...

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 0.5 mol / L, and add 0.3 mol / L of alkaline potassium ferrate with the same volume as the ferrous salt while stirring continuously The solution and 0.2 mol / L hydrogen peroxide solution were stirred at room temperature for 30 minutes, and then 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 salt solution with a concentration of 0.75mol / L, and add half of the same volume of the ferric salt solution with 0.5mol / L alkaline ferrate under constant stirring. Potassium solution and 0.2 mol / L hydrogen peroxide solution were stirred at room temperature for 30 minutes, and then the zeolite was separated, dried in an oven at 80° C. for 12 hours, and cooled to obtain 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 the organic pollutants which are difficult to degrade by the ozone oxidation under the condition of low ozone concentration to remove difficultly degraded organic substances, and is prepared by taking natural zeolite, artificial zeolite or a zeolite-like material as a carrier loaded with active components, wherein the active components comprise ferrihydrite and delta-hydroxyl oxidize iron in a mass ratio of (20 to 80): (20 to 80); the invention further provides a preparation method of the catalyst and a method for treating wastewater by using the catalyst which can effectively remove antibiotics such as metronidazole difficult to degrade in hospital wastewater; furthermore, the invention improves a disinfection device of existing hospital wastewater, namely a filling layer of the iron-based catalyst is added in an ozone contact pool, thereby not only disinfecting wastewater, but also decomposing the antibiotics in wastewater without changing original operating parameters.

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 Applications(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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