Magnetic fenton catalyst spinel ferrite employing fenton iron sludge as iron source and application of magnetic fenton catalyst spinel ferrite

A technology of spinel ferrite and catalyst, which is applied in the direction of physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, iron compound, etc., to achieve good effect, save iron slime treatment cost, iron slime produce less effect

Active Publication Date: 2015-03-25
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of magnetic Fenton catalyst spinel ferrite using Fenton's iron-bearing sludge as an iron source has not been reported in the literature.

Method used

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  • Magnetic fenton catalyst spinel ferrite employing fenton iron sludge as iron source and application of magnetic fenton catalyst spinel ferrite
  • Magnetic fenton catalyst spinel ferrite employing fenton iron sludge as iron source and application of magnetic fenton catalyst spinel ferrite
  • Magnetic fenton catalyst spinel ferrite employing fenton iron sludge as iron source and application of magnetic fenton catalyst spinel ferrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: NiFe 2 o 4 The preparation and characterization process and its application

[0029] ((1), get a certain amount of Fenton's iron-containing sludge and nickel nitrate respectively, so that the mol ratio of nickel and iron is 1: 2;

[0030] (2), Fenton's iron-containing sludge and nickel nitrate solution are mixed and stirred evenly;

[0031] (3), slowly and evenly add sodium hydroxide solution in the resulting mixed solution, and adjust the pH to between 9.0-10.0;

[0032] (4), stirring the obtained mixed solution for more than 8 hours, centrifuging the stirred mixed solution, and washing the obtained solid with water for 2-3 times;

[0033] (5), drying the obtained solid at no higher than 110°C;

[0034] (6) Calcining the obtained solid in the temperature range of 700-900°C to obtain the magnetic Fenton catalyst NiFe 2 o 4 .

[0035] figure 1 Be the NiFe that the embodiment of the present invention makes 2 o 4 The X-ray diffraction (XRD) pattern, ...

Embodiment 2

[0038] Embodiment 2: with CuFe 2 o 4 Phenol Degradation Test for Fenton Catalyst

[0039] Prepare CuFe with the catalyst preparation method described in embodiment 1 2 o 4 , to CuFe 2 o 4 It is a Fenton catalyst, which catalyzes and oxidizes phenol simulation wastewater with an initial concentration of 250mg / L, adjusts the pH of the wastewater to 3.0, and adds 2.0g / L of CuFe 2 o 4 Catalyst, add 4.0g / L concentration and be 30% hydrogen peroxide, record the removal rate of phenol under different time, the result is as follows Figure 4 shown.

[0040] Figure 4 for hydrogen peroxide alone and CuFe 2 o 4 The trend chart of the degradation effect of phenol under the catalytic oxidation of magnetic materials, comparing the removal effect of phenol in the above-mentioned control test, the result CuFe 2 o 4 The addition of magnetic materials significantly promotes the degradation of phenol and has a good catalytic effect.

Embodiment 3

[0041] Embodiment 3: with ZnFe 2 o 4 Phenol Degradation Test for Fenton Catalyst

[0042] Prepare ZnFe with the catalyst preparation method described in embodiment 1 2 o 4 , with ZnFe 2 o 4 It is a Fenton catalyst, which catalyzes and oxidizes phenol simulation wastewater with an initial concentration of 250mg / L, adjusts the pH of the wastewater to 3.0, and adds 2.0g / L of ZnFe 2 o 4Catalyst, add 4.0g / L concentration and be 30% hydrogen peroxide, record the removal rate of phenol under different time, the result is as follows Figure 5 shown.

[0043] Figure 5 For hydrogen peroxide alone and ZnFe 2 o 4 The trend chart of the degradation effect of phenol under the catalytic oxidation of magnetic materials, comparing the removal effect of phenol in the above-mentioned control test, the result ZnFe 2 o 4 The addition of the magnetic material significantly promotes the degradation of phenol and has a good catalytic effect.

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Abstract

The invention discloses a magnetic fenton catalyst spinel ferrite employing fenton iron sludge as an iron source and an application of the magnetic fenton catalyst spinel ferrite. According to the preparation process, the magnetic fenton catalyst spinel ferrite is prepared from iron sludge generated in the fenton process, and nitrate of divalent metals (such as nickel, manganese, zinc, barium and cobalt) as raw materials by adopting a coprecipitation method; and the spinel ferrite instead of Fe<2+> is adopted as a fenton catalyst, and thus a novel fenton oxidation water treatment method is provided. The obtained spinel ferrite magnetic material is small in dimension and good in dispersity in an aqueous solution system, and can be effectively separated and recycled by virtue of an external magnetic field. In addition, the novel fenton catalyst is synthesized by adopting the iron sludge generated by fenton as the iron source; recycling of hazardous solid waste fenton iron sludge is achieved; the subsequent treatment cost of the fenton iron sludge is reduced; and the magnetic fenton catalyst spinel ferrite has a wide application prospect in application of water treatment.

Description

technical field [0001] The invention belongs to the technical field of water treatment and environmental catalysis, and in particular relates to a preparation and application method of a magnetic Fenton catalyst spinel ferrite using Fenton's iron-containing sludge as an iron source. Background technique [0002] For the treatment of refractory chemical wastewater, Fenton oxidation technology can significantly improve the biodegradability of wastewater and reduce the biological toxicity of wastewater. It is a reliable pretreatment method and has been widely used in the treatment of refractory chemical wastewater. However, the traditional Fenton method itself has some defects, such as low catalyst utilization rate and large amount of iron sludge; the iron sludge produced by Fenton belongs to hazardous solid waste and can only be treated as hazardous solid waste, which increases the cost of subsequent treatment. Businesses can't afford it. Therefore, improving the utilization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/745B01J23/80C01G53/00C01G49/00C02F1/72C02F1/58C02F101/34
Inventor 沈锦优刘建国张帅王连军欧昌进李健生孙秀云韩卫清刘晓东
Owner NANJING UNIV OF SCI & TECH
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