Preparation method of two-dimensional ferroferric oxide Fenton catalyst and application thereof in degradation of aminobenzene sulfonic acid-containing wastewater

Abstract

The invention belongs to the technical field of catalytic degradation of organic wastewater, and particularly discloses a preparation method of a two-dimensional ferroferric oxide Fenton catalyst, thepreparation method is characterized by comprising the following steps: continuously adding a mixed solution containing Fe < 2 + > and Fe < 3 + > into an alkali metal hydroxide solution to carry out coprecipitation reaction; and after the reaction is finished, carrying out solid-liquid separation to obtain the product; wherein in the mixed solution, the molar ratio of Fe < 2 + > to Fe < 3 + > is 1: 2; the molar ratio of OH <-> to Fe < 2 + > in the alkali metal hydroxide solution is 9-10: 1; the temperature of the coprecipitation reaction is 95-100 DEG C; and the pH value of the end point of the coprecipitation reaction is 13.0-13.5. Inventor research finds, according to the preparation process, all the parameters are accurately controlled; the ferroferric oxide catalyst with the two-dimensional morphology can be obtained unexpectedly, and the material with the brand-new morphology prepared through the preparation method has excellent catalytic degradation performance on aminobenzenesulfonic acid when used as a Fenton-like catalyst and reaches the level that the content of the aminobenzenesulfonic acid in the wastewater is not detected.

Description

technical field [0001] The invention belongs to the technical field of organic wastewater degradation, and in particular relates to the preparation of a heterogeneous Fenton-like catalyst. [0002] technical background [0003] The wastewater produced by the printing and dyeing industry has always been the focus of pollution prevention and control. In particular, the "Discharge Standard of Water Pollutants for Textile Dyeing and Finishing Industry (GB 4287-2012)" promulgated by the state since 2012 requires that the discharge concentration limit of aniline pollutants in the effluent of printing and dyeing wastewater be "not detected". At present, most of the water systems in my country's printing and dyeing industry use the wastewater generated in various water links for primary treatment in biodegradation pools. However, the biochemical effluent has COD Cr The main problem is the high content of aniline derivatives and high content of aniline derivatives, and it cannot meet...

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Problems solved by technology

[0005] Aiming at the problem that the biochemical effluent of printing and dyeing wastewater contains highly toxic and difficult-to-biodegradable sulfanilic acid, the first object of the present invention is to provide a method for preparing a two-dimensional ferric iron tetroxide Fenton-like catalyst, aiming at preparing a special Catalyst with two-dimensional structure and excellent degradation performance in aminobenzenesulfonic acid

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