A heterogeneous catalytic ozone oxidation decontamination technology based on enhanced ozone adsorption and its application

A heterogeneous catalysis and ozone oxidation technology, which is applied in metal/metal oxide/metal hydroxide catalysts, oxidized water/sewage treatment, physical/chemical process catalysts, etc., can solve the problems of unfavorable separation and improve ozone transmission mass efficiency, enhanced removal and efficient mineralization, enhanced solubility

Active Publication Date: 2016-12-07
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

However, the significant advantage of these catalysts is the high catalytic activity in their powder form, but it is not conducive to achieve separation in the aqueous phase, so it is necessary to develop new catalysts that have the characteristics of easy aqueous phase separation while ensuring high catalytic activity

Method used

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  • A heterogeneous catalytic ozone oxidation decontamination technology based on enhanced ozone adsorption and its application

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Embodiment approach

[0018] The preparation steps of the ferromanganese spinel catalyst will be described below in conjunction with specific embodiments, so as to further understand the invention. The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any combination of the specific embodiments.

specific Embodiment approach 1

[0019] Specific embodiment one: the preparation method of ferromanganese spinel catalyst is carried out as follows

[0020] (1) Accurately weigh 6.275g Mn(NO 3 ) 2 4H 2 O and 20.2g Fe(NO 3 ) 3 9H 2 O, and dissolved in 100mL of deionized water, so that the solute is completely dissolved to obtain a clear solution, the above solution was stirred and dissolved for 0.5h;

[0021] (2) Accurately weigh 80g NaOH, and dissolve it completely with 250ml deionized water;

[0022] (3) to Mn(NO 3 ) 2 and Fe(NO 3 ) 3 Add 75mL NaOH solution dropwise to the mixed solution, and adjust the pH value of the mixed solution to between 7 and 8 to obtain a homogeneous suspension;

[0023] (4) Place the above suspension in a water bath and heat it to 90°C, and age at this temperature for 2h;

[0024] (5) Pour the supernatant of the above-mentioned aged solution, add distilled water and stir to clean the sediment, cover the bottle mouth and continue to precipitate for one hour, then measure ...

specific Embodiment approach 2

[0028] Specific embodiment two: the difference between this embodiment and specific embodiment one is that 20.2g (0.05mol) Fe(NO 3 ) 3 9H 2 O can be replaced by 20.000g (0.05mol) Fe 2 (SO 4 ) 3 or 8.110g (0.05mol) FeCl 3, other steps and parameters are the same as those in the first embodiment.

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Abstract

The present invention aims at the defects that conventional powder catalysts are unfavorable for realizing the separation in the water phase, and proposes a novel catalyst ferromanganese spinel (MnFe 2 o 4 , MFO) preparation method. It integrates MnO x , Fe x o y The superior adsorption and catalytic properties of various forms of manganese and ferromanganese oxides can effectively increase the dissolved ozone content in water, and then can be used as a catalyst to effectively improve the enhanced removal of phenacetin and other personal care products (PPCPs) by ozone in water. Effect; more importantly, ferromanganese spinel is magnetic, and its separation in water can be completed through a magnetic field, which provides a new method for catalyst cleaning and multiple recycling. In addition, my country is rich in manganese and iron, and high-efficiency catalysts constructed with manganese and iron as raw materials have the advantages of low cost and easy availability. The catalyst is prepared by co-precipitation of manganese salt, ferrite and lye, the process is simple, easy to operate, and the preparation cycle of the catalyst is relatively short, and it has potential application prospects in the treatment of drinking water or sewage containing PPCPs .

Description

technical field [0001] The invention relates to the preparation of a heterogeneous catalytic ozonation catalyst based on enhanced ozone adsorption and its application in catalytic ozonation oxidation decontamination technology. Background technique [0002] With the large-scale development of the pharmaceutical and cleaning industry, the production and use of pharmaceutical and personal care products (PPCPs) have increased rapidly, resulting in their residues in water, air and soil environments. But until the end of the 1990s, they were regarded as a large class of environmental pollutants and received widespread attention. Since PPCPs are continuously input into the environment, their residual concentration in the environment is on the rise (the content is in ng / L~μg / L). Long-term consumption of drinking water containing PPCPs is equivalent to continuous consumption of a certain dose of drugs with unknown side effects. Various chemical substances interact in the human body...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889C02F1/78
Inventor 齐飞郭杨徐冰冰孙德智
Owner BEIJING FORESTRY UNIVERSITY
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