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Modified ultrafiltration membrane for removing sulfonamide antibiotics in water, and preparation method and application thereof

A technology of sulfonamides and antibiotics, which is applied in the field of polymer membrane preparation, can solve the problems of inability to remove soluble small molecular substances, low surface energy and strong hydrophobicity, and increase the cost of PVDF, so as to achieve low production cost, simple preparation method, Loss reduction effect

Inactive Publication Date: 2020-08-25
SHANDONG WATER & WASTEWATER MONITORING CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultrafiltration membranes can retain most of the suspended solids and colloids in water, but cannot remove soluble small molecules, hindering the application of ultrafiltration technology in drinking water treatment
[0004] High molecular polymer polyvinylidene fluoride (PVDF) has been widely used due to its good thermal stability, mechanical stability and chemical stability, but its inherent low surface energy and strong surface hydrophobicity are easy to be compared with The intercepted pollutants interact, resulting in rapid occurrence of membrane fouling and continuous attenuation of membrane flux, reduced membrane service life, and increased cost in the application of PVDF membranes

Method used

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  • Modified ultrafiltration membrane for removing sulfonamide antibiotics in water, and preparation method and application thereof
  • Modified ultrafiltration membrane for removing sulfonamide antibiotics in water, and preparation method and application thereof
  • Modified ultrafiltration membrane for removing sulfonamide antibiotics in water, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: prepare PPTFe modified ultrafiltration membrane A

[0036] 1. At room temperature, put 25g of dried polyvinylidene fluoride (PVDF) into a beaker, add 94g of N, N-dimethylacetamide (DMAc), stir quickly, and continue to add 3.0g of polyvinylpyrrolidone ( PVP), 1.5g nano TiO 2and 1.0 g of ferric chloride (FeCl 3 ), the casting solution was stirred in a 62°C water bath at a constant temperature of 200d / min for 3h, and then ultrasonically oscillated and dispersed for 1h to reduce the concentration of nano-TiO 2 The agglomeration of nano-TiO 2 Distribute quickly and evenly in the casting solution.

[0037] 2: Put the casting solution prepared in step 1 at 4°C for more than 24 hours, and cast it on the flat glass of the film scraping machine when in use. The scraper scrapes the film at a speed of 0.8m / min. The distance between the scraper and the film is 190 μm. After the film was formed, it was soaked in ultrapure water for 7 days to eliminate the residual ...

Embodiment 2

[0040] Embodiment 2: prepare PPTFe modified ultrafiltration membrane B

[0041] 1. At room temperature, put 26.5g of dried polyvinylidene fluoride (PVDF) into a beaker, add 96g of N,N-dimethylacetamide (DMAc), stir quickly, and continue to add 3.1g of polyvinylpyrrolidone (PVP), 0.5g Nano TiO 2 and 1.5g ferric chloride (FeCl 3 ), use a stirrer to stir the casting solution in a 60°C water bath at a constant temperature of 100d / min for 3h, then ultrasonically oscillate and disperse for 1h to reduce the concentration of nano-TiO 2 The agglomeration of nano-TiO 2 Distribute quickly and evenly in the casting solution.

[0042] 2: Put the film casting solution prepared in step 1 at 4°C for more than 24 hours, and cast it on the flat glass of the film scraping machine when in use. The scraper scrapes the film at a speed of 0.78m / min. The distance between the scraper and the film is 210 μm. After the film was formed, it was soaked in ultrapure water for 7 days to eliminate the re...

Embodiment 3

[0043] Embodiment 3: prepare PPTFe modified ultrafiltration membrane C

[0044] 1. At room temperature, put 25.8g of dried polyvinylidene fluoride (PVDF) into a beaker, add 99g of N, N-dimethylacetamide (DMAc), stir quickly, and continue to add 3.0g of polyvinylpyrrolidone ( PVP), 1.0g nano TiO 2 and 0.5g ferric chloride (FeCl 3 ), use a stirrer to stir the casting solution in a 58°C water bath at a constant temperature of 300d / min for 3h, then ultrasonically oscillate and disperse for 1h to reduce the concentration of nano-TiO 2 The agglomeration of nano-TiO 2 Distribute quickly and evenly in the casting solution.

[0045] 2: Put the film casting solution prepared in step 1 at 4°C for more than 24 hours, and cast it on the flat glass of the film scraping machine when in use. The scraper scrapes the film at a speed of 0.82m / min. The distance between the scraper and the film is 200 μm. After the film was formed, it was soaked in ultrapure water for 7 days to eliminate the ...

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Abstract

The invention discloses a modified ultrafiltration membrane for removing sulfonamide antibiotics in water, and a preparation method and application thereof. According to the modified ultrafiltration membrane, polyvinylpyrrolidone (PVP), nanometer TiO2 and ferric trichloride (FeCl3) are used as additives, and a physical blending method is adopted to modify a PVDF ultrafiltration membrane. Under thecondition of the same PVDF content, through the addition of PVP, nanometer TiO2 and FeCl3, the number of membrane pores and the pore diameter of the membrane can be obviously increased, and the membrane pores are more uniformly distributed; since TiO2 and FeCl3 are added into the membrane, the hydrophilicity and wettability of the PPTFe membrane can be remarkably improved; and as the number and the size of the membrane pores are increased, the pure water flux of the membrane is obviously improved. The modified ultrafiltration membrane prepared by the method is combined with UV illumination toremove sulfadiazine, so a better removal effect is achieved. The preparation method is simple and convenient to operate and low in production cost.

Description

technical field [0001] The invention relates to a modified ultrafiltration membrane for removing sulfonamide antibiotics in water, a preparation method and application thereof, and belongs to the technical field of polymer membrane preparation. Background technique [0002] With the development of economy and society, the pollution of water environment has intensified, the quality of water sources has deteriorated, and there are more and more pollutants in water, especially organic pollutants. However, traditional drinking water treatment methods only work on general organic pollutants. Insects, algae removal effect is not good, and it is easy to produce disinfection by-products. The new generation of drinking water purification process should not only improve the treatment efficiency and optimize the effect, but also emphasize that no toxic substances are produced in the process, which can improve the utilization rate of resources and energy, reduce the pollution load, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/02B01D67/00B01D61/14C02F1/44C02F101/38
CPCB01D71/34B01D69/02B01D67/0011B01D61/145C02F1/444C02F2101/40C02F2101/308B01D2325/36
Inventor 贾瑞宝孙韶华王明泉辛晓东周安然孙家宁
Owner SHANDONG WATER & WASTEWATER MONITORING CENT
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