Preparation method of microwave-activated persulfate oxidative degradation catalyst for fluorine-containing wastewater

Abstract

The invention discloses a preparation method of a microwave-activated persulfate oxidative degradation catalyst for fluorine-containing wastewater, which is characterized in that it comprises the following steps: Step 1: adding iron nitrate, cobalt nitrate, bismuth nitrate and a dispersant to deionized water or ultrapure water Mix and stir, add nickel foam and then add sodium hydroxide drop by drop to continue stirring, then synthesize in the reaction kettle, wash the synthesized material after the reaction is completed, and finally transfer to the oven for drying to obtain cobalt-modified bismuth ferrite-loaded Foam nickel composite catalyst; step 2: add the composite catalyst and persulfate in step 1 into the reaction bottle equipped with fluorine-containing wastewater, stir to reach adsorption equilibrium, and then transfer to the microwave reactor to obtain microwave-synthesized cobalt-modified bismuth ferrite Supported foam nickel composite catalyst. The invention has the advantages that the cobalt-modified bismuth ferrite-supported foamed nickel composite catalyst oxidizes and degrades high-concentration fluorine-containing wastewater in a microwave-activated persulfate system, has high degradation efficiency, and is beneficial for recycling and reuse.

Description

Preparation method of microwave-activated persulfate oxidative degradation catalyst for fluorine-containing wastewater technical field The present invention relates to the technical field of wastewater treatment, particularly a kind of microwave-activated persulfate oxidative degradation fluorine-containing waste Preparation method of water catalyst. Background technique Fluorinated wastewater is mainly produced by industries such as pesticides, medicines, rubber and plastic products, and the wastewater mainly includes perfluorinated Carboxylic acid, perfluorosulfonic acid, telomer alcohol and other highly toxic perfluorinated compounds, such pollutants can pass through skin contact and ingestion Drinking water and other ways to enter the organism, has a strong toxic effect on the liver and nervous system, and can lead to the development of cancer in severe cases. Health is a kind of pollutant that poses great harm to human health and environmental safety. High effi...

AI Technical Summary

Problems solved by technology

The currently reported microwave-activated persulfate advanced oxidation technology is effective in degrading dyes and other relatively easy-to-degrade pollutants, but it still has limited degradation ability and salinity when degrading pollutants with complex structures and stability such as perfluorinated pollutants. Low-level problems, the main problem is that these catalysts such as activated carbon are not high in response to microwaves, and their catalytic ability to persulfate is poor.

In addition, this type of catalyst also has problems such as difficult recovery and high cost.

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