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Magnetic doped magnetite heterogenous Fenton catalyst, preparation and application of catalyst in dye wastewater treatment

A technology of magnetic doping and dye wastewater, which is applied in oxidation water/sewage treatment, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of less anionic dyes and low catalyst purity. problem, to achieve the effect of reuse, good effect and high removal effect

Inactive Publication Date: 2015-12-30
NANJING UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

At present, the literature reports Fe in the synthesized doped magnetite samples 2+ The ions will be oxidized to different degrees, resulting in low purity of the synthesized catalyst, and the target pollutant selected in most studies is the cationic dye methylene blue, while there are relatively few studies on anionic dyes

Method used

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  • Magnetic doped magnetite heterogenous Fenton catalyst, preparation and application of catalyst in dye wastewater treatment
  • Magnetic doped magnetite heterogenous Fenton catalyst, preparation and application of catalyst in dye wastewater treatment
  • Magnetic doped magnetite heterogenous Fenton catalyst, preparation and application of catalyst in dye wastewater treatment

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Embodiment 1

[0024] Embodiment one: pure phase TiFe 2 o 4 The preparation process and steps are as follows:

[0025] (1) Take an appropriate amount of ferrous sulfate and titanium tetrachloride respectively, according to the molar ratio Fe 2+ : Ti 4+ = Dissolve in deionized water at a ratio of 2:1 and stir evenly.

[0026] (2) Slowly add the mixed solution of metal ions obtained in (1) dropwise into an appropriate amount of ammonia alkali solution, and after the dropwise addition of the metal solution is completed, the reaction system is magnetically stirred for 2 hours.

[0027] (3) After the stirring is completed, the mixed solution is repeatedly washed with water and centrifuged to obtain a catalyst solid.

[0028] (4) The precipitate after centrifugation was dried in an oven at 100° C. for 12 hours.

[0029] (5) After the sample dried in step (4) is cooled, it is ground and sieved, and placed in a muffle furnace for calcination at 400° C. for 3 h. High-efficiency Magnetic Heterog...

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Abstract

The invention discloses an efficient magnetic doped magnetite heterogenous Fenton catalyst, preparation and an application of the catalyst in dye wastewater treatment. A chemical formula of the catalyst is TiFe2O4. The catalyst is prepared through steps as follows: ferrous salt and titanium tetrachloride are dissolved in a mole ratio of Fe<2+> to Ti<4+> being 2:1 and are prepared to form a mixed solution; the mixed solution obtained in the step (a) is slowly added to an alkaline solution dropwise and stirred for reaction; after reaction, repeated washing and centrifugal separation are performed, and then a precipitate is obtained; the dried precipitate is subjected to grinding and screening and is calcinated at the temperature of 300-400 DEG C for 2-3 h; a sample obtained after calcination is subjected to hydrogen gas reduction at the temperature of 300-400 DEG C for 2-3 h, and the catalyst is obtained. Compared with a traditional preparation method, the preparation method of the heterogenous Fenton catalyst TiFe2O4 has the advantages that Fe<2+> in the structure is not oxidized, the catalyst is pure-phase titanomagnetite TiFe2O4, the dye wastewater degradation effect is good, and the catalyst has a very high removing effect.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and environmental catalysis, and in particular relates to a high-efficiency magnetic-doped magnetite heterogeneous Fenton catalyst, its preparation and its application in treating dye wastewater. Background technique [0002] Dye wastewater has the characteristics of complex wastewater components, high pollutant concentration, refractory degradation, and great harm to the environment and human beings. However, traditional wastewater treatment technologies cannot effectively treat dye wastewater. As a classic advanced oxidation technology, Fenton technology is more and more widely used in the treatment of refractory organic pollutants in water. However, the traditional homogeneous Fenton has some disadvantages, such as the generation of a large amount of iron sludge, and the difficulty in recycling and reusing the catalyst. Therefore, the heterogeneous Fenton reaction came into being,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72C02F101/38C02F103/30
Inventor 张晋华张春艳张才华邱园园杨士建梁晓亮戚飞鸿
Owner NANJING UNIV OF SCI & TECH
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