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A method for sulfonated alkali lignin-based polyvinyl formal sponge for adsorbing antibiotics in sewage

A polyvinyl formal, lignin-based technology, applied in adsorption water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of complex reaction process, large wood consumption, long synthesis time, etc. The preparation method and operation process are simple, the adsorption effect is improved, and the synthesis time is short.

Active Publication Date: 2022-07-29
NANJING UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN110527132A discloses a wood sponge material obtained by processing balsa wood blocks. The modified material uses wood as a raw material, which takes a long time to process and consumes a lot of wood
In summary, the previous patents on adsorbents for adsorbing antibiotics have problems such as long synthesis time, complicated reaction process and low adsorption capacity.

Method used

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  • A method for sulfonated alkali lignin-based polyvinyl formal sponge for adsorbing antibiotics in sewage
  • A method for sulfonated alkali lignin-based polyvinyl formal sponge for adsorbing antibiotics in sewage
  • A method for sulfonated alkali lignin-based polyvinyl formal sponge for adsorbing antibiotics in sewage

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Experimental program
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Effect test

Embodiment 1

[0049] A kind of preparation method of lignin-based polyvinyl formal sponge adsorbent

[0050] (1) Alkali lignin (LN) was obtained from papermaking wastewater by dissolving 10 g of alkali lignin in 50 mL of a 3.0 wt% NaOH aqueous solution. The mixture was stirred at 70°C for 30 minutes so that basification occurred. 3 ml of formaldehyde was added to the mixture and stirred for 1 hour, then 2 g of sodium sulfite was added at 95°C and stirred for 3 hours. The product sulfonated alkali lignin was precipitated in ethanol and dried.

[0051] (2) 0.4 g of alkali lignin or 0.4 g of sulfonated alkali lignin and 4 g of polyvinyl alcohol were dissolved together in 36 ml of water at 95°C, respectively. Add 4g of formaldehyde, 10g (50wt%) sulfuric acid and 2.25g of Triton X-100 to 30g of the mixed solution, and stir at a high speed of 1000 rpm for 10 minutes, then pour the mixed solution into a mold, at 50°C Sponge samples were obtained by drying for 3 hours. Then, the sponge is washe...

Embodiment 2

[0053] A kind of preparation method of lignin-based polyvinyl formal sponge adsorbent

[0054] (1) Alkali lignin (LN) was obtained from papermaking wastewater by dissolving 10 g of alkali lignin in 50 mL of a 3.0 wt% NaOH aqueous solution. The mixture was stirred at 70°C for 30 minutes so that basification occurred. 3 ml of formaldehyde was added to the mixture and stirred for 1 hour, then 2 g of sodium sulfite was added at 95°C and stirred for 3 hours. The product sulfonated alkali lignin was precipitated in ethanol and dried.

[0055] (2) 1.2 g of alkali lignin or 1.2 g of sulfonated alkali lignin and 4 g of polyvinyl alcohol were dissolved together in 36 ml of water at 95°C, respectively. Add 4g of formaldehyde, 10g (50wt%) of sulfuric acid and 2.25g of Triton X-100 to 30g of the mixed solution, and stir at a high speed of 1300 rpm for 10 minutes, then pour the mixed solution into a mold, at 55°C Sponge samples were obtained by drying for 3 hours. Then, the sponge is wa...

Embodiment 3

[0060] A kind of preparation method of lignin-based polyvinyl formal sponge adsorbent

[0061] (1) Alkali lignin (LN) was obtained from papermaking wastewater by dissolving a certain amount of alkali lignin in 50 mL of a 3.0 wt% NaOH aqueous solution. The mixture was stirred at 70°C for 30 minutes so that basification occurred. 3 ml of formaldehyde was added to the mixture and stirred for 1 hour, then a certain amount of sodium sulfite was added at 95°C and stirred for 3 hours. The product sulfonated alkali lignin was precipitated in ethanol and dried.

[0062] (2) 1.2 g of alkali lignin or 1.2 g of sulfonated alkali lignin and 4 g of polyvinyl alcohol were dissolved together in 36 ml of water at 95°C, respectively. Add formaldehyde, (50wt%) sulfuric acid and Triton X-100 to 30 g of the mixed solution, stir at 1300 rpm for 10 minutes, pour the mixed solution into a mold, and dry at 55°C for 3 hours to obtain a sponge sample. The sponge is then washed with water and dried. ...

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Abstract

The invention belongs to the field of water environment treatment, and in particular relates to a method for sulfonated alkali lignin-based polyvinyl formal sponge for absorbing antibiotics in sewage. The invention adopts a one-step method and a mechanical foaming method to prepare the sulfonated alkali lignin (LS) and the sulfonated alkali lignin-based polyvinyl formal sponge composite adsorbent (PLS) respectively, and the preparation method and operation process are simple and the synthesis time is short. . The auxiliary raw material used in the present invention is sulfonated alkali lignin, which has a wide range of sources, is non-toxic, can be biodegraded, and has no secondary pollution risk. By introducing sulfonated alkali lignin rich in a large number of phenolic hydroxyl groups, carboxyl groups and sulfonic acid groups into the sponge, it can not only combine with polyvinyl alcohol to improve the three-dimensional structure of the sponge, but also provide adsorption sites to effectively adsorb the pollution in the environmental water. Compared with sponges with alkali lignin (PL) and sponges without lignin (PVF), the adsorption capacity of fluoroquinolone antibiotics was significantly improved.

Description

technical field [0001] The invention belongs to the field of water environment treatment. In particular, it relates to a method for a polyvinyl formal sponge modified by sulfonated alkali lignin for adsorbing antibiotics in sewage, so as to achieve the effect of efficiently adsorbing fluoroquinolone antibiotics in water. Background technique [0002] In recent years, pharmaceuticals and personal care products (PPCPs, Pharmaceuticals and Personal Care Products) have been widely used in human daily production and life. Antibiotics are one of the main types of PPCPs, which are a class of secondary metabolites that are produced by microorganisms (including bacteria, fungi and actinomycetes) or higher animals and plants during their activities to resist pathogens or other active substances. Antibiotics are widely used due to their broad-spectrum antibacterial properties and low side effects, and they can be divided into sulfonamides, fluoroquinolones (FQs, Fluoroquinolones), tet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/265B01J20/24B01J20/28054C02F1/285C02F1/286C02F2101/30
Inventor 杨琥高博强
Owner NANJING UNIV
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