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A kind of preparation method and application of clay/tannic acid/metal ion composite material for efficiently adsorbing antibiotics

A technology of metal ions and composite materials, applied in the direction of adsorption water/sewage treatment, water/sludge/sewage treatment, water/sewage treatment, etc., can solve the problems of low adsorption capacity, complex reaction process, and long synthesis time, and achieve Improve the adsorption capacity, the preparation method and operation process are simple, and the synthesis time is short

Active Publication Date: 2022-07-29
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the relevant patents on the modification of tannic acid have problems such as long time-consuming synthesis of antibiotics in the water body or related patented materials for adsorbing antibiotics, complex reaction process and low adsorption capacity, etc.

Method used

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  • A kind of preparation method and application of clay/tannic acid/metal ion composite material for efficiently adsorbing antibiotics
  • A kind of preparation method and application of clay/tannic acid/metal ion composite material for efficiently adsorbing antibiotics
  • A kind of preparation method and application of clay/tannic acid/metal ion composite material for efficiently adsorbing antibiotics

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A kind of preparation method of clay / tannic acid / metal ion composite adsorbent

[0031] (1) adding 2g of kaolin to the MOPS buffer solution, and ultrasonically dispersing to obtain a kaolin dispersion;

[0032] (2) 10mmol / L tannic acid solution and 40mmol / L iron ion solution are added in kaolin dispersion liquid, described tannic acid and kaolin mass ratio are 1:1, adjust pH=7.5 to react for about 1 minute at room temperature , filtered, washed with water, and dried at room temperature to obtain a kaolin / tannic acid / iron ion composite adsorbent with a molar feeding ratio of tannic acid and metal ions of 1:4. figure 1 is the infrared spectrum of kaolin / tannic acid / iron ion composite adsorbent. Compared with clay, tannic acid and tannic acid / metal ion composite, the infrared spectrum of kaolin / tannic acid / metal ion composite adsorbent contains Infrared characteristic peaks of clay and tannic acid were found; in addition, tannic acid was at 1720cm -1 C=O stretching vibra...

Embodiment 2

[0039] A kind of preparation method of clay / tannic acid / metal ion composite adsorbent

[0040] (1) adding 2g of kaolin to the MOPS buffer solution, and ultrasonically dispersing to obtain a kaolin dispersion;

[0041] (2) adding 10mmol / L tannic acid solution and 20, 30, 40, 50, 60mmol / L iron ion solution to kaolin dispersion liquid respectively, described tannic acid and kaolin mass ratio are 1:1, adjust pH = 7.5 and react at room temperature for about 1 minute, filter, wash with water, and dry at room temperature to obtain a composite adsorbent, and the molar feeding ratios of tannic acid and metal ions are respectively 1:2, 1:3, 1:4, 1:5 , 1:6 kaolin / tannic acid / iron ion composite adsorbent.

[0042] The wastewater containing enrofloxacin antibiotics was a laboratory simulated water sample. The initial concentration of enrofloxacin antibiotics in the simulated wastewater was 0.2 mmol / L, and 10 mg of composite adsorbent was added for adsorption for 12 h. This process detect...

Embodiment 3

[0046] A kind of preparation method of clay / tannic acid / metal ion composite adsorbent

[0047] (1) adding 10 g of attapulgite to the Tris buffer solution, and ultrasonically dispersing to obtain attapulgite dispersion;

[0048] (2) 1mmol / L tannic acid solution and 80mmol / L copper ion solution are added in attapulgite dispersion liquid, described tannic acid and attapulgite mass ratio are 1:1, adjust pH=7, react under room temperature conditions For about 1 minute, filter, wash with water, and freeze-dry to obtain a composite adsorbent.

[0049] The wastewater containing tetracycline antibiotics was a laboratory simulated water sample. The initial concentration of tetracycline antibiotics in the simulated wastewater was 0.2 mmol / L, and 10 mg of composite adsorbent was added for adsorption for 12 h. In this process, the actual adsorption effect of tetracycline antibiotics is detected by liquid chromatography.

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Abstract

The invention belongs to the field of water environment treatment, and in particular relates to a preparation method and application of a clay / tannic acid / metal ion composite material for efficiently adsorbing antibiotics. The invention adopts a one-step method to prepare the clay / tannic acid / metal composite adsorbent, the preparation method and operation process are simple, the synthesis time is short, and the yield is large. The raw material used in the present invention is natural polymer tannic acid, which has a wide range of sources, is non-toxic, biodegradable, and has no risk of secondary pollution. Since the tannic acid structure is rich in a large number of phenolic hydroxyl groups, it can not only chelate with metal ions It also effectively adsorbs pollutants in water, especially after compounding with clay and metal ions to form a new complex with a unique structure, the surface is rougher, the adsorption active sites are increased, the adsorption is effectively increased, and the pollution resistance is greatly improved. adsorption properties of the substance. The clay / tannic acid / metal composite adsorbent of the present invention has a good adsorption effect on antibiotics.

Description

technical field [0001] The invention relates to an adsorbent prepared by a simple one-step reaction of clay materials, natural macromolecular tannic acid and metal ions, so as to achieve the effect of efficiently adsorbing antibiotics in water, and belongs to the field of water environment treatment. Background technique [0002] In recent years, the wide application of PPCPs (pharmaceuticals and personal care products) has attracted widespread attention as a new type of pollutants while improving human life style and level. Antibiotics are one of the main types of PPCPs, which are widely used due to their broad-spectrum antibacterial properties and low side effects. They can be further divided into sulfonamides, fluoroquinolones, tetracyclines, β-lactams and macrocycles. Lactones. After antibiotics enter the human body or animals, 10%-90% are excreted in the form of metabolites due to incomplete absorption and metabolism. On the one hand, due to the low efficiency of anti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/24B01J20/30C02F1/28C02F101/30
CPCB01J20/24B01J20/12C02F1/288C02F1/286C02F1/281C02F2101/30Y02W10/37B01J20/0211B01J20/3078C02F2101/38C02F2101/40
Inventor 杨琥常慊慊
Owner NANJING UNIV