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Method for electro-catalytic degradation of tetracycline in water

An electrocatalytic degradation and tetracycline technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as enrichment, environmental hazards, and antibiotic drug failure, so as to save water resources and protect the environment Effect

Active Publication Date: 2019-12-20
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Tetracycline antibiotics are widely used all over the world due to their low price. Due to the lack of a perfect regulatory system for veterinary antibiotics in my country in the past, tetracycline antibiotics are seriously abused in my country
A large amount of wastewater is also produced during the production of antibiotics, and some unscrupulous manufacturers will also directly discharge the incompletely treated wastewater into the environment, causing serious harm to the environment
[0003] Tetracycline antibiotics are acid-base amphoteric substances, and their hydrochloride properties are relatively stable, so it takes a long time for tetracycline antibiotics to degrade in the environment, so once tetracycline antibiotics enter the environment, they will cause serious impacts, including affecting water bodies The microbial flora, animals and plants in the environment will even be enriched through the food chain, endangering the human body
At the same time, the abuse of antibiotics will also lead to the enhancement of drug resistance of pathogens, and even produce superbugs, resulting in the failure of antibiotics.
[0004] In the prior art, the Chinese patent application with the application number 201811559130.3 also provides a method for degrading tetracycline in water, but this method requires additional peroxides to be added to the wastewater, which not only has certain risks but also increases costs, which is not conducive to promotional use

Method used

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  • Method for electro-catalytic degradation of tetracycline in water
  • Method for electro-catalytic degradation of tetracycline in water
  • Method for electro-catalytic degradation of tetracycline in water

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preparation example Construction

[0024] The preparation method of iron-cobalt alloy carbon nanocomposite fiber is as follows:

[0025] Step 1, preparation is dissolved in the ethanol solution of ferric nitrate and cobalt nitrate, obtains solution A, prepares the ethanol solution that is dissolved in polyvinylpyrrolidone, obtains solution B;

[0026] Wherein, the mass fraction of iron nitrate in solution A is 3.3%, the mass fraction of cobalt nitrate is 1.7%, and in solution B, the mass fraction of polyvinylpyrrolidone (K30, Sinopharm Wokai) is 35.7%;

[0027] Step 2, add 1.5mL of solution A dropwise to 3.5mL of solution B to obtain a mixed solution;

[0028] Step 3, use the mixed solution to carry out high-voltage electrospinning, the parameters of high-voltage electrospinning are voltage 25kV, spinning speed 0.001mm / s, distance between spinning needle and receiver 20cm, and the fiber diameter is 500nm. Vinylpyrrolidone polymer nanofibers;

[0029] Step 4, drying the polyvinylpyrrolidone polymer nanofibers ...

Embodiment 1

[0036] A method for electrocatalytic degradation of tetracycline in water, the steps are as follows:

[0037] Using a three-electrode system consisting of a composite electrode, a calomel electrode and a platinum wire electrode, electrolyze 20 mL of tetracycline aqueous solution containing 0.1 mol / L sodium sulfate,

[0038] Wherein, the initial concentration of tetracycline in the tetracycline aqueous solution is 30 mg / L, the initial pH value is 7, the voltage applied during electrolysis is constant at 1.0 V, and the electrolysis time is 12 hours.

[0039] After the electrolysis, the absorbance at 356.6 nm was measured with a UV spectrophotometer, and the concentration of tetracycline in the system after the electrolysis was measured through the concentration-absorbance curve obtained in advance, and the degradation rate of tetracycline in this embodiment was calculated to be 94.2%.

Embodiment 2

[0041] A method for electrocatalytic degradation of tetracycline in water, the steps are as follows:

[0042] Using a three-electrode system consisting of a composite electrode, a calomel electrode and a platinum wire electrode, electrolyze 20 mL of tetracycline aqueous solution containing 0.1 mol / L sodium sulfate,

[0043] Wherein, the initial concentration of tetracycline in the tetracycline aqueous solution is 30 mg / L, the initial pH value is 3, the voltage applied during electrolysis is constant at 1.0 V, and the electrolysis time is 12 hours.

[0044] After the electrolysis, the absorbance at 356.6 nm was measured with a UV spectrophotometer, and the concentration of tetracycline in the system after the electrolysis was measured through the concentration-absorbance curve obtained in advance, and the degradation rate of tetracycline in this embodiment was calculated to be 97.1%.

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Abstract

The invention provides a method of electro-catalytic degradation of tetracycline in water, and belongs to the field of water treatment. The provided method of electro-catalytic degradation of tetracycline in water comprises the following steps: in a three-electrode system, electrolyzing a tetracycline aqueous solution containing an electrolyte, wherein at least one electrode in the three-electrodesystem is a composite electrode containing iron-cobalt alloy carbon nano composite fiber. Therefore, the method can combine dual advantages of a carbon nanomaterial electrode and a metal material electrode, a microstructure of a carbon nanomaterial makes tetracycline molecules be easier to be concentrated on the electrode surface, and metal nano dots can efficiently degrade tetracycline in wastewater under the action of a voltage. The problem of secondary pollution easily caused in the prior art is solved, and thereby the purpose of protecting environment at low cost and saving water resources is achieved.

Description

technical field [0001] The invention specifically relates to a method for electrocatalytically degrading tetracycline in water, which belongs to the field of water treatment. Background technique [0002] Tetracycline antibiotics are widely used in the world because of their low price. Due to the lack of a perfect regulatory system for veterinary antibiotics in my country in the past, the abuse of tetracycline antibiotics in my country is serious. Due to the good water solubility of tetracycline antibiotics, they easily enter the soil with animal manure and eventually enter surface water bodies. High levels of tetracycline antibiotics can be detected in the water surrounding some farms. A large amount of wastewater is also produced during the production of antibiotics, and some unscrupulous manufacturers will also directly discharge the incompletely treated wastewater into the environment, thereby causing serious harm to the environment. [0003] Tetracycline antibiotics a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/34C02F101/38
CPCC02F1/46109C02F2001/46133C02F2101/34C02F2101/345C02F2101/38
Inventor 谷红波谢文昊
Owner TONGJI UNIV
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