Carbon cage-iron microelectrolytic particles for acidic sewage treatment and preparation method

Abstract

The invention belongs to the technical field of sewage treatment and provides carbon cage-iron microelectrolytic particles for acidic sewage treatment and a preparation method. The method comprises steps as follows: an iron powder dispersion liquid is prepared for mist spray and condensation, iron powder agglomerated microspheres immobilized by stearic acid are prepared, then silica-chitosan composite gel is prepared, the microspheres are uniformly coated with the composite gel and then subjected to high-temperature carbonization, firm microporous cages are formed, iron powder is covered withthe cages, and the microelectrolytic particles with the iron powder covered with the carbon cages are obtained. Compared with a traditional method, the prepared carbon cage-iron microelectrolytic particles not only have good microelectrolysis performance, but also can effectively prevent the iron powder from hardening, the problem that an iron-carbon micro-electrolysis material is prone to hardening and passivating when applied to sewage treatment is solved thoroughly, the purposes of preventing scaling and blockage, realizing continuous operation and efficiently treating acidic sewage can beachieved effectively, meanwhile, the preparation process is simpler, the preparation cost is lower, and the carbon cage-iron microelectrolytic particles can be popularized for production and application.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and provides a carbon cage-iron micro-electrolytic particle for acid sewage treatment and a preparation method. Background technique [0002] With the development of social economy, there are more and more industrial waste water and domestic sewage, which seriously pollute the water body, destroy the ecological environment, and threaten human health and survival. In order to make the sewage meet the discharge standard, people have developed a variety of treatment methods. Sewage usually includes industrial wastewater and domestic wastewater. Industrial wastewater has become the focus of social attention due to its high concentration of organic matter, high toxicity, complex components, and difficult treatment. If the direct discharge will pose a serious threat to the environment, it is necessary to choose an appropriate method for treatment to meet the emission standards. [0003] The c...

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Problems solved by technology

[0006] It can be seen that in the iron-carbon micro-electrolysis technology in the prior art, iron-carbon materials are prone to agglomeration of iron filings and surface passivation, and are prone to problems such as scaling, clogging, and inability to operate continuously. There is poor micro-electrolysis activity and cannot be efficiently processed. Disadvantages such as sewage

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