Preparation method and application of modified active carbon fiber based on 8-hydroxyquinoline ferrum

Abstract

The invention discloses a preparation method and application of a modified active carbon fiber based on 8-hydroxyquinoline ferrum. The preparation method of the supported active carbon fiber comprises the following steps of: (1) respectively dissolving ferric salt and 8-hydroxyquinoline compounds into an organic solvent, and mixing the ferric salt and the 8-hydroxyquinoline compounds according to a certain proportion to prepare a quinoline ferrum complex solution; (2) supporting a quinoline ferrum complex on an active carbon fiber by using an adsorption method or covalent bond grafting method; and (3) finally, taking out the active carbon fiber, washing the surface of the active carbon fiber by using water, and placing the active carbon fiber into a drying oven to dry to obtain the modified active carbon fiber. The modified active carbon fiber is simple in preparation, lower in requirement for reaction environments, capable of efficiently treating printing and dyeing wastewater through catalyzing hydrogen peroxide under the condition that the pH is 2-11, being repeatedly used many times and making up the defects of secondary pollution, narrow pH application range and the like of the traditional Fenton, and higher in implementation value and socioeconomic benefit.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing wastewater treatment, in particular to a preparation method and application of an activated carbon fiber-loaded 8-hydroxyquinoline iron catalyst. Background technique [0002] According to statistics, my country's textile industry produces more than 2 billion tons of wastewater every year, of which printing and dyeing wastewater accounts for 80%. Therefore, how to treat printing and dyeing wastewater better and more efficiently is an important problem that needs to be solved urgently. Among the wastewater treatment methods, the Fenton method is widely used and more effective. [0003] The Fenton method is an advanced oxidation method. The hydroxyl radicals produced by the reaction (oxidation potential 2.8V, second only to fluorine oxidation potential 2.87V) have strong oxidative properties and can oxidize dye molecules and other dyes in printing and dyeing wastewater. Toxic and harmf...

AI Technical Summary

Problems solved by technology

However, the traditional Fenton method has many limitations: (1) The pH range of the reaction is too narrow and must be carried out in a strong acidic environment of 2-4, so it has almost no effect on neutral or alkaline printing and dyeing wastewater; (2) Fe used 2+ and Fe 3+ It is easy to form sludge and cause secondary pollution

[0005] However, the devices required by the above-mentioned preparation method and treatment method are relatively complicated, and the energy consumption is high, so it is not suitable for a large amount of wastewater treatment.