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Amyloid fiber ferric hydroxide heterogeneous Fenton catalyst as well as preparation method and application thereof

A technology of ferric hydroxide and amyloid, applied in the field of amyloid fiber ferric hydroxide heterogeneous Fenton catalyst and its preparation, can solve the problems of secondary pollution, unfriendly environment, poor particle dispersibility, etc.

Active Publication Date: 2021-04-20
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In recent years, studies have found that doping with substances such as polyvinyl alcohol and citric acid can significantly increase the conversion rate of Fe(III) / Fe(II), has catalytic properties, and is one of the important technical means to solve the problem, but Fundamentally speaking, this type of material is not friendly to the environment, is prone to secondary pollution, produces many problems such as mainly OH, and low activity under neutral conditions, which greatly limits its popularization and application. In addition, for most Fe( III) / Fe(II) interface, the particle dispersion is poor, the generation of active species can only rely on the construction of surface Fe, and the utilization rate of iron hydroxide is insufficient

Method used

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  • Amyloid fiber ferric hydroxide heterogeneous Fenton catalyst as well as preparation method and application thereof
  • Amyloid fiber ferric hydroxide heterogeneous Fenton catalyst as well as preparation method and application thereof
  • Amyloid fiber ferric hydroxide heterogeneous Fenton catalyst as well as preparation method and application thereof

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Embodiment 1

[0044] The present embodiment provides a kind of amyloid fiber ferric hydroxide heterogeneous Fenton catalyst, its preparation method and its application method in degrading waste water are as follows:

[0045] Accurately weigh 2.0g of β-lactoglobulin and dissolve it in 100mL of ultrapure water, adjust the pH of the solution to 2.0, and place it in a 90°C water bath for 5 hours to obtain amyloid fibers with a diameter of about 3-5nm and a length of 5-7μm .

[0046] Weigh 2.0g FeCl 3 .6H 2 O is placed in 10mL of the above protein fiber solution, fully mixed with a mixer, and the pH of the mixed solution is adjusted to 4.0 with NaOH to obtain a sub-5nm ferric hydroxide amyloid fiber heterogeneous Fenton catalyst, which is recorded as Fiber-Fe(OH ) 3 .

[0047] Under normal temperature conditions, prepare 100mL of 20mg / L methyl orange, add 0.5mL H 2 o 2 (30%), 5mL of catalyst, adjusted to pH=7.0, magnetically stirred for 2.5h, and the degradation rate of methyl orange reach...

Embodiment 2

[0049] The present embodiment provides a kind of amyloid fiber ferric hydroxide heterogeneous Fenton catalyst, its preparation method and its application method in degrading waste water are as follows:

[0050] Accurately weigh 3.0g of β-lactoglobulin and dissolve it in 100mL of ultrapure water, adjust the pH of the solution to 2.5, and place it in a water bath at 80°C for 6 hours to obtain amyloid fibers with a diameter of about 3-5nm and a length of 7-8μm .

[0051] Weigh 2.5g FeCl 3 .6H 2 O is placed in 10mL of the above-mentioned protein fiber solution, fully mixed with a mixer, and the pH of the mixed solution is adjusted to 4.5 with NaOH to obtain a sub-5nm ferric hydroxide amyloid fiber heterogeneous Fenton catalyst, which is recorded as Fiber-Fe(OH ) 3 .

[0052] Under normal temperature conditions, prepare 100mL of 50mg / L methyl orange, add 0.6mL H 2 o 2 (30%), 6mL of catalyst, adjust pH=2.0, magnetic stirring reaction for 3.0h, the degradation rate of methyl or...

Embodiment 3

[0054] The present embodiment provides a kind of amyloid fiber ferric hydroxide heterogeneous Fenton catalyst, its preparation method and its application method in degrading waste water are as follows:

[0055] Accurately weigh 5.0g of β-lactoglobulin and dissolve it in 100mL of ultrapure water, adjust the pH of the solution to 4.0, and place it in a water bath at 100°C for 10 hours to obtain amyloids with a diameter of about 3-5nm and a length of 2-5μm fiber.

[0056] Weigh 3.0g Fe(NO 3 ) 3 Place in 10mL of the above protein fiber solution, mix thoroughly with a mixer, adjust the pH of the mixture to 7.0 with NaOH, and obtain a sub-5nm ferric hydroxide amyloid fiber heterogeneous Fenton catalyst, denoted as Fiber-Fe(OH) 3 .

[0057] Under normal temperature conditions, prepare 100mL of 100mg / L methyl orange, add 0.7mL H 2 o 2 (30%), 7mL catalyst, adjust pH=4.0, and magnetically stir the reaction for 5.0h, the degradation rate of methyl orange reaches 97%.

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Abstract

The invention provides an amyloid fiber ferric hydroxide heterogeneous Fenton catalyst as well as a preparation method and application thereof, and relates to the field of sewage treatment. The preparation method comprises the following steps: dissolving beta lactoglobulin in water to obtain a protein solution with a mass fraction of 2-5%, adjusting the pH value of the protein solution to 2.0-4.0, placing the protein solution in a water bath with a temperature of 80-100 DEG C, and carrying out a reaction for 5-10 h to obtain a protein fiber solution; dissolving ferric iron salt in the protein fiber solution, and adjusting the pH value to 2.0-7.0 to obtain the amyloid fiber ferric hydroxide heterogeneous Fenton catalyst. According to the invention, beta-lactoglobulin is used as a cocatalyst, and ferric hydroxide is loaded in situ to obtain the heterogeneous composite catalyst. The catalyst can efficiently degrade organic pollutants under acidic, especially neutral conditions, does not produce iron mud, and is a practical catalyst with good potential application prospects.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a heterogeneous Fenton catalyst of amyloid fiber iron hydroxide and its preparation method and application. Background technique [0002] The treatment of refractory organic wastewater has always been a research hotspot in the field of environmental science and technology. These organic pollutants and their metabolites are not only toxic, but also mostly persistent and stubborn. It is difficult to effectively remove them by traditional physical and chemical methods or biodegradation and other water treatment technologies. In recent years, the advanced oxidation water treatment technology, which mainly produces strong oxidizing free radicals, has developed rapidly. Heterogeneous Fenton catalytic oxidation is a very representative advanced oxidation technology. The reactive oxygen species such as hydroxyl radicals (OH) generated during the reaction can attack organic pollutants non...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J35/02B01J35/06C02F1/72C02F101/30C02F101/34C02F101/38C02F103/34
Inventor 张庆瑞贾丽达赵梓屹高文艳赵玄宋雅然孙奇娜彭秋明
Owner YANSHAN UNIV
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