Iron inner electrolysis catalyst and preparation method thereof

Abstract

The invention relates to catalysts for treating industrial waste water, in particular to an iron inner electrolysis catalyst and a preparation method thereof. The iron inner electrolysis catalyst comprises the following components: simple copper supported by molecular sieves, manganese dioxide supported by molecular sieves, and natural manganese ore with the mass ratio thereof being 1:0.5-1.0:0.5-1.0. The preparation method thereof comprises the following steps: respectively immersing roasted molecular sieves in the solutions of soluble copper salt and manganese salt by the supporting capacity of copper and manganese dioxide; dipping, drying and roasting the molecular sieves to respectively obtain the copper oxide and manganese dioxide supported by the molecular sieves; crushing and sieving the natural manganese ore to obtain the natural manganese ore granules; reducing the copper oxide supported by the molecular sieves by using hydrogen to obtain the simple copper supported by the molecular sieves; and mixing the simple copper supported by molecular sieves, manganese dioxide supported by molecular sieves, and natural manganese ore granules by the mass ratio to obtain the product. Accordingly, the invention is suitable for the pre-treatment before the biochemical treatment of high-chromaticity non-biodegradable industrial waste water.

Description

technical field [0001] The invention relates to a catalyst for treating industrial waste water, in particular to an iron-in electrolytic catalyst and a preparation method thereof. Background technique [0002] In recent years, with the increasing pollution of surrounding water bodies and soil by industrial wastewater such as dyeing and finishing, chemical industry, and electroplating, especially dyeing and finishing wastewater often contains highly toxic dyes and intermediates, as well as refractory biodegradable combustion aids and acids. , alkalis, inorganic salts, etc. This type of industrial wastewater has large water volume, high chroma, high CODcr content, and poor biodegradability. Compared with urban domestic sewage, it is more difficult to treat. At present, the treatment methods for this kind of industrial wastewater often use physical and chemical methods as pretreatment of biochemical methods. Physicochemical methods have problems such as high processing costs ...

AI Technical Summary

Problems solved by technology

However, this method also has many disadvantages: (1) After a period of use, iron and carbon are easy to harden, resulting in channeling and affecting its treatment effect; (2) The oxidation-reduction potential between the iron-carbon electrodes is small, which affects the flow of organic molecules on the electrodes. (3) The efficiency of electrolytic treatment of wastewater in iron-carbon is not high, etc.

Aiming at the traditional iron-carbon internal electrolysis technology, Chinese patent CN101671067 discloses a method of using gas and water backwashing to catalyze the electrolytic filler in iron, which overcomes the problem that iron-carbon is easy to harden; Chinese patent CN02111901 discloses a method for using iron-copper electrodes It replaces the iron-carbon electrode, increases the potential difference between the two electrodes, and further improves the electrochemical reaction efficiency. However, the patent proposes that there are difficulties in the process implementation of using a copper frame as a copper electrode.

Chinese patent CN1935680 discloses the use of iron shavings and copper shavings as microelectrode materials for catalyzing iron electrolysis, but when such electrode materials are used in large quantities, scarce copper shavings are also hard-won; Chinese patent CN101641068 further proposes to use a copper-plated The magnetic iron oxide powder particles replace the carbon electrode, which solves the problem of copper microelectrode recycling