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Preparation method of amyloid fiber iron oxide composite film and method for removing phosphate in tail water of municipal sewage treatment plant

A technology of amyloid protein and iron oxide, applied in water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, chemical instruments and methods, etc., can solve the problems of poor adsorption capacity of activated carbon and improve phosphorus removal performance , Environmental benefits are obvious, and the effect of ensuring stability

Active Publication Date: 2022-02-22
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of activated carbon for phosphate in water is relatively poor.
Therefore, there is currently no more suitable method that can efficiently utilize nano-iron oxide (Fe 2 o 3 ) plan for phosphate wastewater treatment

Method used

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  • Preparation method of amyloid fiber iron oxide composite film and method for removing phosphate in tail water of municipal sewage treatment plant

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preparation example Construction

[0027] The preparation method of the amyloid fiber iron oxide composite film of the present invention comprises the following steps

[0028] Step S1, weighing the functional protein and dissolving it in water, controlling the mass fraction to 5%-25%, adjusting the pH of the solution to 2.0-4.0 and placing it in a water bath at 80-100°C for 5-10 hours to obtain a protein fiber solution;

[0029] Step S2, weighing iron oxide and placing it in the protein fiber solution, controlling the mass fraction of Fe% to 2%-4%, adjusting the pH of the mixed solution to 3.5-5.5, stirring to make the mixture uniform, and obtaining a suspension B.

[0030] Step S3, put the diatomite powder in the water, control the mass fraction of the diatomite powder to 5%-20%, stir and mix thoroughly, record it as suspension A, and fully mix suspension A and suspension B , measured by the volume ratio of suspension A:suspension B, controlled at 1:1-3:1, mixed evenly and then filtered to form amyloid fiber i...

Embodiment 1

[0050] Accurately weigh 10g of bovine serum albumin and dissolve it in 190mL of pure water, adjust the pH of the solution to 2.0, and place it in a water bath at 80°C for 5 hours to obtain a protein fiber solution. Amyloid fibers with a diameter of about 5nm and a length of 2 microns can be obtained. The transmission electron microscope morphology of the resulting amyloid fibrils is as follows: figure 1 shown.

[0051] Weigh 5.8g of iron oxide and put it into the above protein fiber solution, mix thoroughly with a mixer, adjust the pH of the mixed solution to 3.5 with NaOH, and a large amount of white suspension appears, and the sub-10nm iron oxide amyloid fiber composite material is obtained, record Make suspension B.

[0052] Put 10g of 200-mesh diatomite powder in 190mL aqueous solution, stir and mix thoroughly, and record it as suspension A, 150mL of suspension A and 150mL of suspension B are fully mixed, then placed in a vacuum filtration device, and suction filtered Fo...

Embodiment 2

[0057] Accurately weigh 25g of lysozyme protein and dissolve it in 75mL of pure 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 a protein fiber solution, in which amyloid fibers with a diameter of about 5 nm and a length of 5 microns can be obtained.

[0058] Weigh 6g of iron oxide and place it in the above protein fiber solution, mix thoroughly with a mixer, adjust the pH of the mixed solution to 5.5 with NaOH, and a large amount of white suspension appears, and the sub-10nm iron oxide amyloid fiber composite material is obtained, which is denoted as Suspension B.

[0059] Put 40g of 200-mesh diatomite powder in 160mL aqueous solution, stir and mix thoroughly, and record it as suspension A, fully mix 120mL of suspension A with 40mL of suspension B, then place it in a vacuum filtration device, and Filtrate into a film to obtain a thickness of 2.3mm and a density of 0.1535g / mm 3 Amyloid fiber iron oxide composite film (...

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Abstract

The invention relates to a preparation method of an amyloid fiber iron oxide composite film and a method for purifying phosphate in tail water of a municipal sewage treatment plant. The invention uses sub-10nm iron oxide amyloid fiber composite adsorption material and natural diatomaceous earth as a supporting layer to prepare the composite amyloid fiber film by vacuum suction filtration. The temperature of phosphorus-containing polluted water is controlled at 5°C-55°C, the pH is controlled within the range of 3-10, P(Ⅴ)=2-50mg / L; it passes through the composite membrane at a flow rate of 0.1-5L / h, when phosphorus Ion pollution, water contains a lot of NO 3 ‑ , SO 4 2‑ 、CI ‑ When conventional anions compete, the phosphorous content of the effluent can be reduced below the safety standard (GB8978-2002, P<0.5mg / L) after being treated by the adsorption material of the present invention, and the effect is remarkable.

Description

technical field [0001] The invention relates to a preparation method of an amyloid fiber iron oxide composite film and a method for removing phosphate in tail water of a municipal sewage treatment plant. Background technique [0002] At present, water pollution caused by phosphate is an important environmental problem closely related to human health and ecological environment. The irrational use of phosphorus-containing pesticides in agricultural production and the extensive use of phosphorus-containing detergents in daily life are important sources of phosphorus-containing wastewater. Phosphate water pollution can easily lead to eutrophication of water bodies, seriously affecting the development of fisheries, and more seriously, it will lead to the breakdown of ecological balance and the destruction of food chains, which will eventually lead to serious threats to the living environment of human beings. The development of deep purification technology for phosphate in water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D71/74B01D67/00C02F1/44C02F101/10
CPCB01D69/12B01D71/74B01D67/0079C02F1/44C02F2101/105
Inventor 宁玉婷张庆瑞齐世兴闫晓冰赵晖孙奇娜黄海明
Owner YANSHAN UNIV
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