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Preparation method of amorphous iron oxyhydroxide and recovery method after absorbing organic matter

An iron oxyhydroxide and amorphous technology, which is applied in the fields of iron oxide, chemical instruments and methods, iron oxide/iron hydroxide, etc., can solve the problems of low production efficiency and difficult recycling of iron oxyhydroxide, and achieve the improvement of production efficiency, Improve preparation efficiency and good catalytic effect

Active Publication Date: 2021-04-20
HONGHE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems of low preparation efficiency of ferric oxyhydroxide and difficult recycling of amorphous ferric oxyhydroxide after adsorbing organic matter. The present invention provides a preparation method of amorphous ferric oxyhydroxide and a recovery method after adsorbing organic matter. Iron oxide is used as a raw material to prepare amorphous iron oxyhydroxide, which does not require an oxidation process and has high efficiency; the iron oxyhydroxide after absorbing organic matter is calcined to obtain nano-iron oxide with photocatalytic properties, which can be used for photocatalytic interpretation of organic matter

Method used

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  • Preparation method of amorphous iron oxyhydroxide and recovery method after absorbing organic matter
  • Preparation method of amorphous iron oxyhydroxide and recovery method after absorbing organic matter
  • Preparation method of amorphous iron oxyhydroxide and recovery method after absorbing organic matter

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Effect test

Embodiment 1

[0021] Make kerosene, Span 80, Tween 80 and distilled water into a microemulsion phase according to the mass ratio: 20:10:10:1, stir until transparent; add ferric chloride powder, ferric chloride powder and distilled water The mass ratio is 1-4:1, and it is fully stirred until the powder is completely dissolved, adding sodium hydroxide particles, the molar ratio of sodium hydroxide to ferric chloride is 1:1, heating to 80 ° C for 30 minutes and then stopping heating, The precipitate was obtained by centrifugation, washed twice with absolute ethanol, washed twice with distilled water, and dried to obtain amorphous iron oxyhydroxide. Its XRD pattern is attached figure 1 shown.

[0022] Add 0.1 g of amorphous ferric oxyhydroxide to 100 ml of methyl orange solution with a concentration of 50 mg / l, stir and adsorb for 10 minutes under the condition of avoiding light, take a sample, and centrifuge for 10 minutes at a speed of 10,000 rpm in a centrifuge , remove the amorphous iron ...

Embodiment 2

[0024] The amorphous iron oxyhydroxide adsorbed methyl orange in Example 1 was calcined at 700°C for 2 hours to obtain nano-α iron oxyhydroxide, and its XRD pattern is as attached image 3 shown. Take 100 milliliters of methyl orange solution with a concentration of 20 mg / l, add 0.01 g of nano-α ferric oxyhydroxide, stir for 1 hour in the dark, add 5 milliliters of 30% hydrogen peroxide, and irradiate it under 300 nm ultraviolet light for degradation. The degradation rate is shown in the attached Figure 4 shown.

Embodiment 3

[0026] Take 100 milliliters of methyl orange solution with a concentration of 20 mg / l, add 0.01 g of nano-α ferric oxyhydroxide prepared in Example 2, and stir in the dark for 1 hour, add 5 milliliters of 30% hydrogen peroxide, and irradiate it under a 300W xenon lamp. Degradation, degradation rate as attached Figure 5 shown.

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Abstract

The invention discloses a preparation method of amorphous ferric oxyhydroxide and a recovery method after absorbing organic matter. The invention improves the preparation efficiency of amorphous ferric oxyhydroxide, since the raw material used for the preparation is ferric chloride, and the iron is three Valence iron, instead of traditional ferrous chloride or ferrous sulfate, avoids the oxidation process in the preparation process, and greatly improves the preparation efficiency of amorphous ferric oxyhydroxide. The ferric oxyhydroxide after absorbing organic matter is effectively recycled and calcined to obtain nano-α iron oxide with photocatalytic effect. Due to the presence of organic matter, the grain ratio of the prepared nano-iron oxide is directly oxidized by amorphous oxyhydroxide. The nano-iron oxide prepared by iron is finer, has more active points on the surface, and has better catalytic effect.

Description

technical field [0001] The invention relates to the field of degradation of organic matter in printing and dyeing wastewater, in particular to a preparation method of amorphous ferric oxyhydroxide and a recovery method after absorbing organic matter. Background technique [0002] At present, the domestic production of ferric oxyhydroxide mainly uses ferrous sulfate and sodium carbonate or ammonium bicarbonate as raw materials. After mixing in proportion, they are heated and oxidized by air, washed and filtered to make products. The process adopts the air oxidation method, the reaction speed is slow, and the production efficiency is low. [0003] Amorphous iron oxyhydroxide is widely used in desulfurization agent, heavy metal removal agent and sewage treatment agent. Its removal of organic wastewater is mainly physical adsorption, and does not decompose organic matter. When the iron oxyhydroxide that has adsorbed organic matter is reused, its adsorption efficiency decreases ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/02C01G49/06B82Y40/00C02F1/28C02F1/30C02F1/32C02F1/72C02F101/30C02F101/34C02F101/38
CPCB82Y40/00C01G49/02C01G49/06C01P2002/72C02F1/281C02F1/30C02F1/32C02F1/722C02F1/725C02F2101/30C02F2101/34C02F2101/38C02F2101/40C02F2305/10
Inventor 李楠易中周单科翟凤瑞何云龙
Owner HONGHE COLLEGE
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