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Method for modifying ultrafiltration membrane through nano-particle coating

A nanoparticle and ultrafiltration membrane technology, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of membrane fouling hindering the popularization and application of membrane technology, so as to improve water treatment efficiency, facilitate promotion, reduce The effect of membrane fouling

Inactive Publication Date: 2016-06-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0002] The application of membrane technology in the field of environmental water treatment is becoming more and more extensive, and it has gradually become one of the foundations of the world's sustainable development strategy. Membrane technology is considered to be one of the most important new technologies in the 21st century. However, membrane fouling is still an obstacle to membrane technology. Major barriers to adoption

Method used

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  • Method for modifying ultrafiltration membrane through nano-particle coating
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  • Method for modifying ultrafiltration membrane through nano-particle coating

Examples

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Embodiment example 1

[0027] 1), add 1 milliliter of 0.5mol / L sodium bicarbonate solution to 100 milliliters of deionized water, then add 10ml of 0.1mol / L aluminum sulfate octadecahydrate, adjust the pH with 0.1mol / L sodium hydroxide solution 7±0.1, heat the solution to boil for 3min to granulate the amorphous floc in the solution, such as figure 1 As shown, the solution was left to stand for 30 minutes and the temperature was lowered to room temperature. Under the condition of constant pressure of 0.1 MPa, the particles in the solution after boiling were loaded on the surface of the polyethersulfone ultrafiltration membrane.

[0028] 2), 3 milliliters of 0.5mol / L sodium bicarbonate solution is added to 300 milliliters of deionized water, then add 1 milliliter of 3g / L bovine serum albumin (BSA) stock solution, adjust with 0.1mol / L hydrochloric acid solution The pH is 7 ± 0.1, the BSA solution is pre-deposited with the polyethersulfone ultrafiltration membrane ultrafiltration of 10mmol / L aluminum na...

Embodiment example 2

[0030] 1), add 1 milliliter of 0.5mol / L sodium bicarbonate solution to 100 milliliters of deionized water, then add 10 milliliters of octadecahydrate aluminum sulfate with a concentration of 0.1mol / L, and use 0.1mol / L sodium hydroxide solution Adjust the pH to 7±0.1, heat and boil the solution for 5 minutes to granulate the amorphous flocs in the solution, such as image 3 As shown, the solution was allowed to stand for 30 minutes to room temperature, and the particles in the solution after boiling were loaded onto the surface of the polyethersulfone ultrafiltration membrane under a constant pressure of 0.1 MPa.

[0031] 2), add 3 milliliters of 0.5mol / L sodium bicarbonate solution to 300 milliliters of deionized water, then add 1 milliliter of 3g / L HS stock solution, and adjust the pH to 7±0.1 with 0.1mol / L hydrochloric acid solution , the HS solution is pre-deposited in the above step 1) with the polyethersulfone ultrafiltration membrane ultrafiltration of 10mmol / L aluminum ...

Embodiment example 3

[0033] 1), add 1 milliliter of 0.5mol / L sodium bicarbonate solution to 100 milliliters of deionized water, then add 10 milliliters of 0.1mol / L aluminum sulfate octadecahydrate, adjust with 0.1mol / L sodium hydroxide solution The pH is 7±0.1, and the solution is heated and boiled for 10 minutes to granulate the amorphous flocs in the solution, such as Figure 5 As shown, the solution was allowed to stand for 30 minutes to room temperature, and the particles in the solution after boiling were loaded onto the surface of the polyethersulfone ultrafiltration membrane under a constant pressure of 0.1 MPa.

[0034] 2), add 3 milliliters of 0.5mol / L sodium bicarbonate solution to 300 milliliters of deionized water, then add 1 milliliter of 3g / L SA stock solution, adjust the pH to 7±0.1 with 0.1mol / L hydrochloric acid solution , the SA solution is pre-deposited with the polyethersulfone ultrafiltration membrane ultrafiltration of 10mmol / L aluminum nanoparticles in the above-mentioned st...

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Abstract

The invention relates to a method for modifying an ultrafiltration membrane through a nano-particle coating, and belongs to the field of environmental water treatment. The method comprises the following steps: adding A into deionized water, then adding a flocculant; regulating pH to be neutral through an acid solution or an alkaline solution after the reaction is complete; heating the solution to be boiled to enable amorphous flocs in the solution to be granulated, leaving the solution to stand to be naturally cooled to room temperature, and loading particles in the solution to the surface of the ultrafiltration membrane in a constant pressure condition. According to the method for modifying the ultrafiltration membrane through the nano-particle coating, ano-particles pre-deposited on the surface of the ultrafiltration membrane preferentially adsorb pollutants, so that membrane pollution is reduced, the service life of the membrane is prolonged, and the water treatment efficiency is improved; besides, physical absorption is formed between the nano-particles pre-deposited on the surface of the ultrafiltration membrane and the ultrafiltration membrane, after reaction, the nano-particles can be completely removed after being scraped through a plastic scraper and are washed with deionized water, therefore the ultrafiltration membrane can be reused, the method is simple and easy to operate, liable to large-scale application, and convenient for promotion.

Description

technical field [0001] The invention relates to a method for modifying an ultrafiltration membrane by a nano particle coating, which belongs to the field of environmental protection water treatment. Background technique [0002] The application of membrane technology in the field of environmental water treatment is becoming more and more extensive, and it has gradually become one of the foundations of the world's sustainable development strategy. Membrane technology is considered to be one of the most important new technologies in the 21st century. However, membrane fouling is still an obstacle to membrane technology. The main obstacle to popularization and application. In the early days, the main method to reduce membrane fouling was to carry out a pretreatment process on sewage to reduce membrane fouling. The most important and traditional pretreatment process was chemical coagulation. In addition, there are pretreatment methods such as ultrasonication, backwashing, elect...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D71/68B01D71/34B01D69/02C02F1/44C02F1/28
CPCB01D67/0088B01D69/02B01D71/34B01D71/68C02F1/281C02F1/444
Inventor 刘婷连元龙孙克宁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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