Method for preparing modified bauxite catalyst in ozone heterogeneous catalysis water treatment technology

A technology of heterogeneous catalysis of water and heterogeneous catalysis, which is applied in the field of preparation of catalysts of ozone heterogeneous catalysis water treatment technology system, can solve the problems of low catalysis efficiency and high cost, and achieves improved utilization efficiency, increased generation rate and quantity, and improved production efficiency. The effect of secondary pollution

Inactive Publication Date: 2010-04-07
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the catalysts currently used generally have low catalytic efficiency, high cost, and certain selectivity, which are difficult to meet actual needs.

Method used

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  • Method for preparing modified bauxite catalyst in ozone heterogeneous catalysis water treatment technology
  • Method for preparing modified bauxite catalyst in ozone heterogeneous catalysis water treatment technology
  • Method for preparing modified bauxite catalyst in ozone heterogeneous catalysis water treatment technology

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specific Embodiment approach 1

[0010] Specific implementation mode 1: In this implementation mode, the iron-modified bauxite ozone heterogeneous catalytic water treatment technology system catalyst modification background is natural bauxite, and the main components are γ-AlOOH and γ-Al 2 o 3 .

specific Embodiment approach 2

[0011] Specific embodiment two: the preparation method of iron-modified bauxite ozone heterogeneous catalytic water treatment system catalyst is realized according to the following steps: (1) preparing Fe(NO 3 ) 3 Modified solution, the concentration level is 0.196~0.206mol / L, and stored at room temperature; (2) After cleaning 5g of natural bauxite, dry it at a temperature of 68~72°C for 30~35h; (3) Put the above Then soak in 100mL of the above solution, shake in a steam bath at 22-28°C for 14-18 hours; then age at room temperature for 22-26 hours; then pour off the supernatant, and dry the remaining suspension at 65-75°C for 26 hours ~30 hours to obtain dry powder, and grind the dry powder to fine particles for later use; (4) place the above fine particles in a high-temperature muffle furnace for high-temperature calcination at a calcination temperature of 590-610°C and a calcination time of 3.5-4.5 hours to obtain Dry powder: Grind and sieve the above dry powder to select a...

specific Embodiment approach 3

[0012] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the natural bauxite in the step (2) is in a massive form. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention relates to a method for indexing a catalyst used for a trace toxic non-biodegradable organic pollutant in ozone heterogeneous catalysis degradation water, which belongs to the field of water treatment technology and environment functional materials. The catalyst takes powdered natural bauxite as a carrier, and takes an oxide of Fe as an active component. The catalyst is prepared by a layered immersion method which comprises the following steps: preparing an iron salt solution; immersing the powdered natural bauxite in a certain mass into the iron salt solution; and obtaining an iron modified bauxite catalyst after vapour bath, ageing, drying and calcination. The catalyst in the invention has remarkable catalytic activity in a system for removing the trace toxic non-biodegradable organic pollutant in water through ozone heterogeneous catalysis, and simultaneously has the advantages of low preparation cost, good stability and the like. The advantages are favourable for the application of the catalyst in an ozone heterogeneous catalysis system, promote the production application of the ozone heterogeneous catalysis system, and provide an effective method for technology for the enhanced removal of the trace toxic non-biodegradable organic pollutant in the water.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for an ozone heterogeneous catalytic water treatment technology system. Background technique [0002] In recent years, with the rapid development of my country's industrialization and the substantial improvement of the economic level, the production and use of different forms of chemical substances are increasing, resulting in a significant increase in the types and contents of pollutants in water sources, and aggravating the degree of water environmental pollution. Trace amounts of toxic and refractory organic pollutants (chlorinated aromatic compounds, benzotriazole compounds, and psychotropic drugs) in water bodies are being increasingly recognized by people because of their harmful effects, toxicological characteristics, pollution levels, and trends. s concern. The conventional water supply treatment process (coagulation-sedimentation-filtration-disinfection) is mainly to remove suspended...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78B01J23/745B01J37/02
Inventor 齐飞张立秋孙德智徐冰冰
Owner BEIJING FORESTRY UNIVERSITY
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