Water purification method capable of realizing in-situ preparation and in-situ regeneration of catalyst and catalyzing zone to oxidize organic micropollutants

A technology of organic pollutants and ozone oxidation, which is applied in chemical instruments and methods, oxidized water/sewage treatment, physical/chemical process catalysts, etc. problems, to achieve excellent ability to catalyze the ozone oxidation process, good refractory organic pollutants, and avoid the deactivation of active functional groups.

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, the heterogeneous catalytic ozonation technology has its own shortcomings: (1) the catalytic active sites of the catalyst are reduced after loading, and the catalytic activity is reduced; (2) the catalyst falls off and the catalyst is lost during long-term use; (3) the catalyst falls off or becomes inactivate

Method used

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  • Water purification method capable of realizing in-situ preparation and in-situ regeneration of catalyst and catalyzing zone to oxidize organic micropollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of copper-manganese composite oxide / support matrix catalyst: use diatomaceous earth as the support matrix and fill in such as figure 1 In the columnar reactor shown; prepare 0.075mol / L CuCl solution; prepare 0.050mol / LNaOH and 0.025mol / L KMnO 4 mixed solution. Mix an equal flow of CuCl solution and an equal flow of NaOH and KMnO 4 The mixed solution is pumped into the figure 1 For the reactor shown, ensure that the load substrate is completely submerged. Then pump clean water into the reactor and let it flow out slowly until the concentration of copper and manganese in the effluent is lower than the national drinking water quality standard.

Embodiment 2

[0030] Preparation of copper-manganese composite oxide / loaded matrix catalyst: use quartz sand as the loaded matrix to fill in such as figure 1 In the column reactor shown; prepare 0.075mol / L CuSO 4 Mixed solution with 0.075mol / L CuCl; prepare 0.20mol / L KOH and 0.025mol / L KMnO 4mixed solution. equal flow of CuSO 4 and CuCl mixed solution and equal flow of KOH and KMnO 4 The mixed solution is pumped into the figure 1 For the reactor shown, ensure that the load substrate is completely submerged. Then pump clean water into the reactor and let it flow out slowly until the concentration of copper and manganese in the effluent is lower than the national drinking water quality standard.

Embodiment 3

[0032] Preparation of copper-manganese composite oxide / supported substrate catalyst: use ceramsite as the loaded substrate and fill in such as figure 1 In the columnar reactor shown; prepare 0.075mol / L MnSO 4 Mixed solution with 0.075mol / L CuCl; prepare 0.175mol / L KOH and 0.050mol / L KMnO 4 mixed solution. MnSO 4 and CuCl mixed solution and equal flow of KOH and KMnO 4 The mixed solution is pumped into the figure 1 For the reactor shown, ensure that the load substrate is completely submerged. Then pump clean water into the reactor and let it flow out slowly until the concentration of copper and manganese in the effluent is lower than the national drinking water quality standard.

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Abstract

The invention discloses a water purification method capable of realizing in-situ preparation of a catalytic material, catalyzing ozone by the catalyst to oxidize organic micropollutants and realizing in-situ regeneration of the catalytic material, which is economic, effective, simple, convenient and practical. Permanganate, manganese salt, copper salt, cuprous salt and the like are taken as raw materials; copper and manganese composite oxide with high catalytic activity is loaded on a base material in an in-situ reaction manner to prepare the catalyst; the catalyst is applied to the catalysis of the ozone oxidation process, so that the effect of removing the organic micropollutants which are difficult to degrade from water by using the ozone can be effectively improved; and when the catalyst is inactivated or lost, the active material is subjected to load regeneration by a simple and effective in-situ regeneration method.

Description

Technical field: [0001] The invention relates to a method for preparing, using and regenerating a catalyst, in particular to a method for purifying water by catalyzing ozone to oxidize trace organic pollutants. Background technique: [0002] The water treatment technology with ozone oxidation as the core is one of the commonly used technologies in the advanced treatment of drinking water. In general, ozone oxidation includes two methods: direct ozone oxidation and indirect oxidation. The direct oxidation of ozone has strong selectivity, and it is easier to attack organic compounds with double bonds. The rate constant of the reaction is 10 0 ~10 3 m -1 ·s -1 The main problem of direct ozone oxidation is that the mineralization ability of organic matter is weak, and the final oxidation products are mostly small molecule organic acids, which affects the quality of effluent water. Under certain reaction conditions, ozone can decompose to produce OH, because the reaction bet...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/94C02F1/78
Inventor 兰华春刘会娟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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