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

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...

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 inactivated Afterwards, it cannot be regenerated in situ, or the regeneration method is complicated to operate, and the regeneration cost is expensive; (4) Harmful metal ions (Co 2+ 、Ce 3+ 、Ni + etc.), resulting in secondary pollution of water quality

These defects limit its large-scale application in drinking water treatment

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