Nano porous boron ore loaded iron-manganese composite deep treatment catalyst applied to ozone catalytic oxidation

Abstract

The invention relates to a nano porous boron ore loaded iron-manganese composite deep treatment catalyst applied to ozone catalytic oxidation. The catalyst takes porous boron ore as a carrier; Mn2O3,Fe2O3 and FeMnO3 are loaded on the porous boron ore; and in the catalyst, the content of the Mn2O3 is 20 to 50 percent, the content of the Fe2O3 is 1 to 15 percent, the content of the FeMnO3 is 1 to 15 percent and the balance is the carrier. According to the catalyst provided by the invention, manganese, iron and boron are compounded so that the catalytic efficiency of the catalyst is greatly improved and ozone can be induced to produce more hydroxyl free radicals (.OH); the utilization rate of the ozone is high and the COD (Chemical Oxygen Demand) value removal efficiency is high; a degradedproduct has a smaller molecule and is more easy to biodegrade; and the catalyst still has a removal effect on ammonia nitrogen and has the advantages of low cost, simple technological flow and operation and convenience for realizing industrialization.

Description

technical field [0001] The invention relates to a nanoporous boron ore-loaded iron-manganese composite advanced treatment catalyst for catalytic oxidation of ozone, belonging to the technical field of water treatment. Background technique [0002] There are a large number of refractory organic pollutants in industrial wastewater (such as chemical industry, pharmaceuticals, printing and dyeing, papermaking, etc.). After entering the urban sewage treatment plant, it is difficult to further remove it and have an impact on the operation of the urban sewage treatment plant. Therefore, the effective advanced treatment of industrial wastewater biochemical tail water is a common and key problem faced by industrial wastewater treatment. [0003] The biochemical tail water of industrial wastewater has extremely poor biodegradability and cannot be directly treated by biochemical processes. Physicochemical treatment is currently the main advanced treatment process, including coagulatio...

AI Technical Summary

Problems solved by technology

Commonly used carriers include activated carbon, alumina, zeolite, ceramsite, silica gel, etc. In practice, it is found that there are the following defects: 1) Some catalysts have a single effect and only work on a certain substance in the wastewater, and cannot afford other pollutants. 2) The catalytic efficiency of the catalyst is low, the catalytic effect is unstable and difficult to reach the standard stably, and the cost is high

[0007] Another example is that Chinese patent document CN106669726A discloses a kind of ozone catalyst for effectively stabilizing ammonia nitrogen content in iron and steel wastewater and its preparation and application. The catalyst uses molecular sieves, alumina, and silicon dioxide as carriers to load manganese, cobalt, and cerium to obtain ternary Mn -Co-Ce ozone catalyst, however, the catalyst uses cobalt and cerium, the cost of raw materials is high, and the purpose is single, which can only maintain the stability of ammonia nitrogen content in steel wastewater

[0008] As another example, the Chinese patent document CN106622278A discloses a high specific surface area monolithic alumina-supported iron-manganese binary catalyst, which has low catalytic efficiency for wastewater with complex components, and the catalytic effect is unstable and difficult to reach the standard stably.

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