An activated carbon fiber loaded with co 3 o 4 Preparation method of catalytic material

Abstract

The invention belongs to the technical field of sewage processing, and concretely relates to a method for preparing an active carbon fiber (ACF)-loaded Co3O4 catalysis material. The method comprises the following steps: weighing a proper amount of active carbon fiber and placing the active carbon fiber in a nitric acid solution for immersion, taking ACF out and using distilled water for washing bymultiple times to a neutral state, after drying, adding Co(NO3)2.6H2O and Na(NO3)2 in a hexyl alcohol beaker, performing magnetic stirring to uniform mixing, transferring the material to a round-bottom flask, adding pre-treated active carbon fiber in the round-bottom flask, and after immersion for 10 h, performing oil-bath backflow heating. The method is used for preparing the Co3O4 / ACF catalyst,on one hand, absorption effect of the active carbon fiber is used, dye waste water is absorbed surrounding the active carbon fiber, on the other hand, the catalyst Co3O4 is loaded on the active carbon fiber, the catalyst has low dissolution rate and high-efficiency catalytic oxidation effect, and has good degradation effect on the high-concentration difficultly-degraded dye waste water.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a novel advanced oxidation technology for degrading high-concentration refractory dye wastewater, specifically an activated carbon fiber loaded with Co 3 o 4 Preparation method of catalytic material. Background technique [0002] With the rapid development of modern organic chemistry, the accompanying water pollutants have become increasingly prominent, which has attracted people's attention. Some pollution control issues are in front of us, such as some chemical factories, pharmaceutical factories, printing and dyeing factories discharge wastewater and pesticide residues, etc. These substances are highly toxic and have complex components, which are difficult to degrade by general biochemical methods. [0003] Printing and dyeing wastewater is a typical biochemically difficult organic wastewater. The various dye wastewater discharged every year in the world reaches 1,00...

AI Technical Summary

Problems solved by technology

Azo dyes are generally produced through diazotization and coupling reactions, so the chemical properties are stable, and the concentration and chroma of azo dye wastewater are high, the components are complex, the biochemical properties are poor, and the treatment is difficult.

The discharge of azo dyes into the water environment will cause serious environmental pollution: damage the beauty of the water body, affect people's visual experience; reduce the intake of sunlight, hinder the photosynthesis of aquatic plants; many azo dyes are harmful to aquatic plants such as fish and algae. Biologically toxic; aromatic amine compounds formed in an anaerobic environment are carcinogenic and potentially harmful to human health

[0004] The traditional treatment methods of azo dyes mainly include adsorption method, flocculation method, membrane separation method and biological method: (1) Adsorption method, activated carbon (Activated carbon, AC) is widely used for adsorption because of its large specific surface area and good chemical stability. It uses AC adsorption to treat azo dye wastewater without adding chemical reagents. The operation method is simple and has good adsorption performance for different types of dyes, but there are also some disadvantages: AC is not suitable for wastewater with high concentration and hydrophobic dyes. The treatment often shows certain limitations, the unit treatment cost is high, and AC regeneration is difficult, and it is easy to generate a large amount of toxic solid waste; (2) flocculation method, this method has lower treatment cost than adsorption method, but it has strong hydrophilicity The treatment effect of azo dyes is often poor, and more importantly, it will also produce a large amount of toxic sludge; (3) Membrane separation method, using membrane separation technology to treat azo dye wastewater, the process is simple, easy to operate, and can Overcome the shortcomings of adsorption and flocculation methods that produce a large amount of solid toxic waste, but their operating costs are high, membrane regeneration is difficult, and the requirements for influent water quality are also high; (4) Biological methods, biological methods have the advantage of low processing costs, It can decolorize some types of azo dyes to a certain extent, but due to the toxicity of intermediate products (such as aromatic amines) or the impact of wastewater salinity, the treatment efficiency is often very low

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