Supported iron oxychloride Fenton's reagent and preparation method thereof

A technology of ferric oxychloride and Fenton's reagent, which is applied in chemical instruments and methods, oxidized water/sewage treatment, physical/chemical process catalysts, etc., can solve the problem of unstable metal oxide solid Fenton's reagent and Fenton's reagent Problems such as large amount of use and insufficient contact with the reaction solution achieve the effect of not easy to fall off and lose, the method is simple, and the effect of recycling is convenient.

Inactive Publication Date: 2018-12-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 r...

Method used

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  • Supported iron oxychloride Fenton's reagent and preparation method thereof
  • Supported iron oxychloride Fenton's reagent and preparation method thereof
  • Supported iron oxychloride Fenton's reagent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Clean the activated carbon to remove dust, put it into a 500ML beaker, add a sufficient amount of dilute hydrochloric acid solution (2.5mol / L) to boil, keep it for 2 hours, then add dilute hydrochloric acid solution of the same concentration to soak for 24 hours, remove the activated carbon and use it Wash with deionized water several times, and dry in an oven. Weigh 20 grams of ferric chloride hexahydrate and 5.5 grams of powdered activated carbon, heat them in an oven at 60°C for 20 minutes, place them in a constant temperature oscillator for 3 hours, and finally process them ultrasonically for 20 minutes. The mixture was placed in a closed container and heated at 200°C for 2 hours in a muffle furnace at a heating rate of 10°C / min. The obtained solid was ground into powder particles, washed several times with deionized water and acetone, and dried in an oven.

[0023] The Fenton's reagent prepared above was subjected to X-ray diffraction analysis, and it was known th...

Embodiment 2

[0026] The activated carbon pretreatment method is as described in Example 1. Weigh 10 grams of ferric chloride hexahydrate and 3.8 grams of pretreated coconut shell activated carbon particles, place them in an oven and heat them at 60 degrees for 20 minutes, and then place them in a constant temperature oscillator Shake for 3 hours, and finally sonicate for 20 minutes. The mixture was placed in a closed container, heated in a tube furnace at 250°C for 2 hours under a nitrogen atmosphere at a heating rate of 10°C / min, cooled to room temperature, and the solid was washed several times with deionized water and acetone, and placed in an oven drying.

[0027] 100 mg of the product made in Example 2 is added to 100 milliliters of concentration in the rhodamine dye wastewater of 100 mg / L, the pH value is neutral, and the concentration of potassium persulfate added is 15 mmol / L, and the degradation rate within 40 minutes Up to 99%. The UV-Vis absorption spectrum changes with time d...

Embodiment 3

[0029] Add 100 mg of activated carbon-loaded oxyferric chloride Fenton reagent prepared in Example 1 into 100 milliliters of rhodamine dye wastewater with a concentration of 100 mg / L, adjust the pH value to between 9-10, and add potassium persulfate The concentration is still 15mmol / L, and the degradation rate can reach 90% within 30 minutes.

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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...

Claims

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Application Information

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IPC IPC(8): B01J27/128C02F1/72C02F101/30
CPCB01J27/128C02F1/722C02F1/725C02F2101/308C02F2305/023C02F2305/026
Inventor 李英柳
Owner CHANGZHOU UNIV
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