Preparation method of poly-metallic oxide-loaded catalytic ozonation catalyst and application
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An ozone catalytic oxidation and multi-metal oxide technology, applied in the field of water treatment, can solve the problems of strict catalytic conditions, short service life and high production cost, and achieve the effects of stable catalytic activity, no secondary pollution and easy recovery.
Inactive Publication Date: 2017-08-18
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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However, most of the catalysts currently used have disadvantages such as complex process, high production cost, low processing efficiency, short service life, and strict catalytic conditions.
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[0025] The invention discloses a preparation method of a supported multi-metal oxide ozone catalytic oxidation catalyst, which comprises the following steps:
[0026] a. Activate diatomite with a diameter of d in a microwave generator, the microwave power is p, and the microwave activation time is T 1 , and then immersed in NaOH solution, the concentration of NaOH solution is C 1 , immersion time T 2 , taken out and dried to obtain pretreated diatomaceous earth;
[0027] b. Immerse the pretreated diatomite in copper nitrate, nickel nitrate, manganese nitrate, cobalt nitrate, and nitric acid at a concentration of 0.1mol / L, 0.3mol / L, 1mol / L, 0.5mol / L, and 0.7mol / L, respectively. In the mixed solution of iron, the ratio of pretreated diatomite to the mixed solution is n 1 , the time for the pretreated diatomite to be immersed in the mixed solution is T 3 , the immersion temperature is 25°C to obtain the catalyst precursor;
[0028] c. After drying the catalyst precursor in a...
Embodiment 1-5
[0030] According to the preparation method of the above-mentioned loaded multi-metal oxide ozone catalytic oxidation catalyst, the process parameters of each step of Examples 1-5 are shown in Table 1 below:
[0031] Table 1 process parameter table
[0032]
[0033]
[0034] In Comparative Examples 1-14, the effects of carrier type, mixed solution type and concentration, and microwave activation process were studied. The process parameter values of each variable are shown in Table 2-4 below. The preparation method and other process parameters are the same as in Example 3.
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Abstract
The invention discloses a preparation method of a poly-metallic oxide-loaded catalytic ozonation catalyst and an application. The preparation method of the catalyst comprises the following steps of: a, activating diatomite, the diameter of which is 1-3mm, in a microwave generator, then immersing the diatomite in a NaOH solution, and taking out the diatomite to dry to obtain pre-treated diatomite; b, immersing the pre-treated diatomite in a mixed solution of copper nitrate, nickel nitrate, manganese nitrate, cobalt nitrate and ferric nitrate to obtain a catalyst precursor; and c, drying the catalyst precursor, and roasting the catalyst precursor at a high temperature to obtain the poly-metallic oxide-loaded catalytic ozonation catalyst. By selecting diatomite as a carrier which is cheap and easily available, the preparation process is simple, and the catalyst is easy to recover and suitable for industrial production on a large scale. The poly-metallic oxide-loaded catalytic ozonation catalyst prepared by the preparation method is used for treating antibiotic industrial wastewater.
Description
technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a preparation method of a supported multimetal oxide ozone catalytic oxidation catalyst, and simultaneously the invention also relates to the application of the catalyst. Background technique [0002] my country is a big water-short country, and the amount of water available for people's production and living is less than 1 / 2 of the world's per capita share. Conservation and utilization of water resources has become a top priority. With the development of industry, the discharge of industrial wastewater is increasing day by day, and its composition is complex, which has caused great harm to the environment and human beings. Among them, pharmaceutical wastewater accounts for 2.52% of the total discharge of industrial wastewater. Pharmaceutical wastewater has complex components, many types of organic pollutants, high concentrations, high and fluctuating COD and BOD values...
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