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In situ load preparation of catalyst and catalytic ozonation drinking water deep purification method thereof

A technology of ozone oxidation and deep purification, applied in the direction of catalyst activation/preparation, catalyst regeneration/reactivation, chemical instruments and methods, etc., can solve problems such as not being widely promoted and applied, affecting large-scale applications, and complex reactors, etc. Achieving the effect of good catalytic ozonation oxidation to degrade refractory pollutants in water, excellent catalytic ozonation process ability, and simple operation process

Inactive Publication Date: 2012-07-18
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, the above-mentioned technologies have not been widely applied in the engineering practice of drinking water treatment.
This is mainly due to the shortcomings of the above-mentioned various methods: for the first method, UV has a good application prospect, but its large-scale application is affected by water quality conditions such as turbidity and chromaticity in water; in addition, the above-mentioned applied physical The energy method has high energy consumption and complex reactors, making it difficult to use in large-scale municipal water supply plants
However, in the process of drinking water treatment, the catalyst may be poisoned and its active components may be deactivated. In addition, the active components may be lost through collision and friction during long-term operation, which greatly limits its application in engineering practice.

Method used

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  • In situ load preparation of catalyst and catalytic ozonation drinking water deep purification method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of iron-manganese composite oxide / support matrix catalytic material: fill the columnar reactor with diatomaceous earth as the support matrix; prepare 15g / L FeSO 4 ·7H 2 O and 4g / L KMnO 4 Reserve solution, add appropriate amount of lye to make the pH value of permanganate solution between 9.0-11.0; pump FeSO 4 Solution pumped in figure 1 In the shown reactor, stop the pump until the load matrix is ​​submerged, and release the medicinal solution after immersion for 15 minutes; the permanganate solution added with lye is pumped into the reactor ( figure 1 ), stop the pump until the loaded substrate is submerged, let the solution flow out after immersion for 20 minutes, and let it stand for 60 minutes intermittently. Repeat the above method 3 times. Pump clean water into the reactor and let it flow out slowly until the concentration of iron and manganese in the effluent is lower than the national drinking water quality standard.

Embodiment 2

[0030] Preparation of iron-manganese composite oxide / support matrix catalytic material: fill the columnar reactor with diatomaceous earth as the support matrix; prepare 8g / L FeSO 4 ·7H 2 O with 10g / L FeCl 3 ·6H 2 Mixed stock solution of O; prepare 2g / L KMnO 4 reserve solution, and add an appropriate amount of lye to make the pH value of the permanganate solution between 9.0-11.0; pump FeSO 4 with FeCl 3 The mixed solution is pumped into figure 1 In the shown reactor, stop the pump until the load matrix is ​​submerged, and release the medicinal solution after immersion for 30 minutes; the permanganate solution added with lye is pumped into the reactor ( figure 1 ), stop the pump until the loaded substrate is submerged, let the solution flow out after immersion for 30 minutes, and let stand for 30 minutes intermittently. Repeat the above method 3 times. Pump clean water into the reactor and let it flow out slowly until the concentration of iron and manganese in the efflue...

Embodiment 3

[0032] Preparation of iron-manganese composite oxide / support matrix catalytic material: fill the columnar reactor with ceramsite as the support matrix; prepare 8g / L FeSO 4 ·7H 2 O, 8g / L MnCl 2 4H 2 O with 10g / L FeCl 3 ·6H 2 Mixed stock solution of O; prepare 15g / L KMnO 4 stock solution, and add an appropriate amount of lye to make the pH value of the permanganate solution between 10-11; use a pump to pump the mixed solution figure 1 The shown reactor stops the pump until the load matrix is ​​submerged, and releases the medicinal solution after 60 minutes of immersion; the permanganate solution added with lye is pumped into the reactor ( figure 1 ), stop the pump until the loaded matrix is ​​submerged, let the solution flow out after 60 minutes of immersion, and let stand for 60 minutes intermittently. Repeat the above method 5 times. Pump clean water into the reactor and let it flow out slowly until the concentration of iron and manganese in the effluent is lower than t...

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Abstract

The invention discloses a drinking water deep purification method, which is economic, effective, simple and practical to prepare catalytic materials, catalyze ozonation pollutants with a catalyst and regenerate the catalytic materials. Permanganate, manganese salt, ferric salt, ferrous salt and the like are treated as raw materials, and ferric manganese compound oxide with good catalytic activity is loaded on a base body material through in situ reactions to be manufactured into a catalyst. The catalyst is applied to catalytic ozonation processes and can effectively improve removal effects of ozone on pollutants difficult to degrade in water. When the catalyst is inactivated or washed away, a simple in situ regeneration method can be used for leading active materials to be loaded and regenerated.

Description

technical field [0001] The invention relates to a method for preparing, using and regenerating a catalyst, in particular to a method for advanced treatment of drinking water that catalyzes an ozone oxidation process. Background technique [0002] As a strong oxidant, ozone is widely used in drinking water treatment; especially when there are refractory toxic organic pollutants (such as persistent organic pollutants POPs, endocrine disrupting substances EDCs, etc.) in the water, ozone oxidation is to protect drinking water One of the important ways of quality safety. The oxidation of organic matter by ozone mainly includes direct oxidation and indirect oxidation. Among them, the direct oxidation ability of ozone is weak, and it is difficult to completely mineralize refractory organic matter; the indirect oxidation of ozone is mainly through the generation of hydroxyl radicals with strong oxidation ability ( · OH) is realized, · OH is characterized by non-selective oxidatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/02B01J38/70C02F1/78
Inventor 刘会娟兰华春顾金山陈明吉张东康兰英刘锐平赵旭胡承志朱明珠李杰
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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