Supported iron oxychloride Fenton's reagent and preparation method thereof

Abstract

The invention relates to a supported iron oxychloride Fenton's reagent and a preparation method thereof. The supported iron oxychloride Fenton's reagent only can form an oxidizing system with hydrogenperoxide or persulfate and can quickly and effectively degrade pollutants. The preparation method comprises the following steps: uniformly mixing ferric trichloride and activated carbon pretreated with dilute acid, and then placing into a sealed container, calcining for a period of time under high temperature, cooling and then cleaning and drying. The invention can solve the problems of poor dispersity, insufficient catalytic activity, large actual dosage, low stability, easiness in suffering from reagent loss and ion dissolving, and the like, of a conventional solid Fenton's reagent. The Fenton's reagent prepared according to the invention has a quick and efficient degrading effect on dye wastewater, can be conveniently recycled and regenerated, has an excellent recycling effect, is lowin dissolving concentration of iron ion and has lower subsequent treating pressure. The preparation method is simple, is high in degree of controllability, is suitable for large-scale production, is lower in production and use cost and has an industrial application prospect.

Description

technical field [0001] The invention belongs to the field of Fenton reagent preparation, and in particular relates to a preparation method of active carbon-loaded oxyferric chloride Fenton reagent. Background technique [0002] The traditional Fenton's reagent is composed of ferrous ions and hydrogen peroxide. When it is added to the liquid phase, the ferrous ions catalyze the hydrogen peroxide to generate hydroxyl radicals with strong oxidative properties, which are used to degrade various organic pollutants. Because this Fenton system needs to react under acidic conditions, the catalyst is easy to lose, and iron sludge precipitation will occur, so its application is limited to a certain extent. In order to overcome these disadvantages, a series of solid-phase Fenton reagents based on metal oxides have been prepared, which can activate hydrogen peroxide to generate hydroxyl radicals, which are less affected by pH, and more importantly, can be separated from the reaction med...

AI Technical Summary

Problems solved by technology

[0003] Although the solid-phase Fenton reagent overcomes some shortcomings of the homogeneous Fenton reagent, there are still areas that need to be improved. For example, the metal oxide solid Fenton reagent is unstable in an acidic environment and there is a problem of metal ion dissolution.

Although the granular solid Fenton's reagent is easy to separate from the liquid medium, it has the disadvantage of small specific surface area and insufficient contact with the reaction solution, resulting in a large amount of Fenton's reagent used.

Although the solid Fenton reagent of nanomaterials has a large specific surface area, it is difficult to separate and recover

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