Method for degrading antibiotics in water by piezoelectric catalytic strengthening of noble opal

Abstract

This invention belongs to the field of antibiotic water pollution treatment technology and discloses a method for enhancing the degradation of antibiotics in water by SPC using precious opal piezoelectric catalysis. The method includes the following steps: (1) mixing precious opal with SPC and adding it to water containing antibiotics, stirring to form a suspension; (2) subjecting the suspension obtained in step (1) to piezoelectric catalytic reaction treatment to obtain purified water after antibiotic degradation. The method of this invention utilizes the synergistic effect of sodium percarbonate and precious opal to further improve the degradation rate of antibiotics. Both sodium percarbonate and precious opal used are environmentally friendly, solving the problems of potential environmental pollution and the need for strong acid reaction conditions associated with classic Fenton reagents. It has advantages such as simple process conditions, thorough degradation, fast degradation speed, and no secondary pollution, and can be widely applied to the degradation of antibiotics in water.

Description

Technical Field

[0001] This invention belongs to the field of antibiotic water pollution treatment technology, specifically relating to a method for enhancing the degradation of antibiotics in water by SPC using precious opal piezocatalysis. Background Technology

[0002] Tetracycline antibiotics enter the environment through industrial production and livestock waste. Because they are difficult for animals and plants to absorb, they accumulate in the environment and can cause significant toxicological effects such as immunotoxicity, mutagenicity, and embryotoxicity, posing a serious threat to public health and the social environment, and thus becoming typical environmental pollutants.

[0003] Currently, tetracycline degradation mainly occurs through biodegradation and abiotic degradation. Biodegradation includes microbial degradation and plant degradation; abiotic degradation includes photodegradation, oxidative degradation, and hydrolysis. The main principle of biodegradation technology is that certain plants or microorganisms can degrade specific tetracycline antibiotics. Biodegradation technology is relatively sensitive to the environment, has a long degradation cycle, and poor stability. The reaction mechanism of photochemical degradation of antibiotics mainly involves various reactions caused by the absorption of light energy in the molecule. The reaction mechanism of oxidative degradation involves adding chemical agents to water, where they come into contact with and interact with tetracycline antibiotics, ultimately causing the tetracycline in the water to be oxidized, reduced, separated, decomposed, transformed, or even removed. Both photodegradation and oxidative degradation can degrade tetracycline relatively quickly.

[0004] Patent CN110803755A discloses a method for degrading antibiotics in livestock and poultry breeding wastewater using a composite water treatment oxidant based on sodium percarbonate. The composite water treatment oxidant is prepared by mixing sodium percarbonate and persulfate in a specific ratio. It utilizes the in-situ activation of divalent copper ions in the livestock and poultry breeding wastewater to generate highly active oxidizing groups, thereby achieving effective degradation of antibiotics in the wastewater. This treatment technology is mainly applicable to the treatment of livestock and poultry breeding wastewater containing divalent copper ions.

[0005] Patent CN112158909A discloses a method for treating tetracycline in water using a UV-activated dual oxidant system. The method involves mixing a solution containing SPS and SPC with an aqueous solution containing tetracycline, then placing the mixture in a reactor equipped with a 75W low-pressure mercury lamp. After reacting for a certain period, the UV-activated dual oxidant system can be used to treat the tetracycline in the water. This invention primarily employs a UV-activated SPS and SPC system to achieve highly efficient removal of tetracycline from water.

[0006] Patent CN113402008A discloses a method for removing antibiotics from water by activating percarbonate with chalcopyrite. The method uses chalcopyrite as a catalyst to activate percarbonate and treat antibiotics in the water. The chalcopyrite used is CuFeS2. In this invention, the chalcopyrite can continuously and efficiently activate percarbonate to produce a variety of reactive substances with oxidizing capabilities, which can be used to effectively degrade antibiotics.

[0007] Precious opal is a hydrated form of silicon dioxide, with the composition SiO2·nH2O. It has an amorphous structure, can be formed in almost all rocks, is non-toxic and harmless, and boasts advantages such as wide availability, low cost, and high safety. However, there are currently few reports on using precious opal to enhance the oxidative degradation of antibiotics. Summary of the Invention

[0008] To address the shortcomings and deficiencies of the existing technologies, the present invention aims to provide a method for the degradation of antibiotics in water by SPC enhanced by piezoelectric catalysis using precious opal. Both sodium percarbonate and precious opal used in this method are environmentally friendly, solving the problems of potential environmental pollution and the need for strongly acidic reaction conditions associated with classic Fenton reagents. This method offers advantages such as simple process conditions, thorough degradation, rapid degradation, and no secondary pollution, and can be widely applied to the degradation of antibiotics in water.

[0009] The objective of this invention is achieved through the following technical solution:

[0010] A method for enhancing the degradation of antibiotics in water by SPC using precious opal piezocatalysis includes the following steps:

[0011] (1) Mix precious opal with SPC (sodium percarbonate) and add it to water containing antibiotics, then stir to form a suspension;

[0012] (2) The suspension obtained in step (1) is subjected to piezoelectric catalytic reaction to obtain purified water after antibiotic degradation.

[0013] Furthermore, the particle size of the precious opal in step (1) is 20-1000 nm.

[0014] Furthermore, the mass ratio of the precious opal to SPC in step (1) is 1 to 4:1.

[0015] Furthermore, in step (1), the solid-liquid ratio of the precious opal mixed with SPC and added to the water containing antibiotics is (10-100) mg: (5-50) ml.

[0016] Furthermore, in the water containing antibiotics described in step (1), the antibiotic concentration is 5–1000 mg / L.

[0017] More preferably, the antibiotic is tetracycline.

[0018] Furthermore, the piezoelectric catalytic reaction described in step (2) is carried out under microwave conditions with a power of 100 to 700 W.

[0019] More preferably, the temperature of the piezoelectric catalytic reaction is 20–60°C.

[0020] The principle of this invention is as follows: Hydrogen peroxide is released during the piezoelectric catalysis of precious opal. Furthermore, the piezoelectric catalysis of precious opal also promotes the release of hydrogen peroxide from sodium percarbonate. Sodium percarbonate and precious opal work synergistically in the piezoelectric catalysis process of precious opal to enhance the degradation rate of tetracycline.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) The precious opal and sodium percarbonate used in this invention are non-toxic to the human body and the environment and will not cause secondary pollution.

[0023] (2) In this invention, under the piezoelectric catalytic treatment of precious opal, sodium percarbonate and precious opal work synergistically to further improve the degradation rate of tetracycline.

[0024] (3) The method of the present invention has a significant effect on the degradation of tetracycline, with a degradation rate of 85% in 4 hours.

[0025] (4) The method of the present invention is simple and easy to implement, and can be applied to the treatment of antibiotics in water, especially tetracycline, with significant effect. Attached Figure Description

[0026] Figure 1 The graph shows the results of the remaining percentage of tetracycline in the aqueous solution under different piezoelectric catalytic reaction times in Example 1 of the present invention.

[0027] Figure 2 The graph shows the results of the remaining percentage of tetracycline in the aqueous solution under different piezoelectric catalytic reaction times in Comparative Example 1 of this invention.

[0028] Figure 3 The graph shows the results of the remaining percentage of tetracycline in the aqueous solution under different piezoelectric catalytic reaction times in Comparative Example 2 of this invention. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0030] Example 1

[0031] A method for enhancing the degradation of antibiotics in water using SPC with precious opal piezocatalysis, the specific steps of which are as follows:

[0032] (1) Take 40mg of opal with an average particle size of 500nm and 20mg of SPC powder, mix them, and then add them to 50mL of tetracycline aqueous solution with a concentration of 30mg / L. Stir to form a suspension.

[0033] (2) The suspension obtained in step (1) was subjected to piezoelectric catalytic reaction treatment at 25°C and microwave conditions with a power of 100W to obtain purified water after antibiotic degradation.

[0034] The results of the remaining percentage of tetracycline in the aqueous solution under different piezoelectric catalytic reaction times in this embodiment are as follows: Figure 1 As shown. By Figure 1 The results showed that after 4 hours of treatment, the degradation rate of tetracycline in the water reached 85%.

[0035] Comparative Example 1

[0036] Compared with Example 1, this comparative example is a method for SPC degradation of antibiotics in water using only the following steps:

[0037] (1) Take 20 mg of SPC powder and add it to 50 mL of tetracycline aqueous solution with a concentration of 30 mg / L. Stir to form a suspension.

[0038] (2) The suspension obtained in step (1) was subjected to piezoelectric catalytic reaction treatment at 25°C and microwave conditions with a power of 100W to obtain purified water after antibiotic degradation.

[0039] The results of the remaining percentage of tetracycline in the aqueous solution under different piezoelectric catalytic reaction times in this embodiment are as follows: Figure 2 As shown. By Figure 2 The results showed that after 4 hours of treatment, the degradation rate of tetracycline in the water was 72%.

[0040] Comparative Example 2

[0041] Compared with Example 1, this comparative example is a method for SPC degradation of antibiotics in water, and the specific steps are as follows:

[0042] (1) Take 40 mg of precious opal with an average particle size of 500 nm and add it to 50 mL of tetracycline aqueous solution with a concentration of 30 mg / L. Stir to form a suspension.

[0043] (2) The suspension obtained in step (1) was subjected to piezoelectric catalytic reaction treatment at 25°C and microwave conditions with a power of 100W to obtain purified water after antibiotic degradation.

[0044] The results of the remaining percentage of tetracycline in the aqueous solution under different piezoelectric catalytic reaction times in this embodiment are as follows: Figure 3 As shown. By Figure 3The results showed that after 4 hours of treatment, the degradation rate of tetracycline in the water was 45%.

[0045] The results of Example 1 and Comparative Examples 1-2 show that, under piezoelectric catalytic treatment conditions, sodium percarbonate and precious opal have a synergistic effect, which can further improve the degradation rate of tetracycline.

[0046] Example 2

[0047] A method for enhancing the degradation of antibiotics in water using SPC with precious opal piezocatalysis, the specific steps of which are as follows:

[0048] (1) Take 20 mg of opal with an average particle size of 500 nm and 20 mg of SPC powder, mix them, and then add them to 50 mL of tetracycline aqueous solution with a concentration of 30 mg / L. Stir to form a suspension.

[0049] (2) The suspension obtained in step (1) was subjected to piezoelectric catalytic reaction treatment at 45°C and microwave conditions with a power of 300W to obtain purified water after antibiotic degradation.

[0050] In this embodiment, after 4 hours of treatment, the degradation rate of tetracycline in water reached 82%.

[0051] Example 3

[0052] A method for enhancing the degradation of antibiotics in water using SPC with precious opal piezocatalysis, the specific steps of which are as follows:

[0053] (1) Take 60mg of opal with an average particle size of 100nm and 20mg of SPC powder, mix them, and then add them to 50mL of tetracycline aqueous solution with a concentration of 100mg / L. Stir to form a suspension.

[0054] (2) The suspension obtained in step (1) was subjected to piezoelectric catalytic reaction treatment at 60°C and microwave conditions with a power of 500W to obtain purified water after antibiotic degradation.

[0055] In this example, after 4 hours of treatment, the degradation rate of tetracycline in the water reached 84%.

[0056] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A method for enhancing the degradation of antibiotics in water using SPC with piezoelectric enhancement using precious opal, characterized in that, Includes the following steps: (1) Mix precious opal with SPC and add it to water containing antibiotics, then stir to form a suspension; (2) The suspension obtained in step (1) is subjected to piezoelectric catalytic reaction to obtain purified water after antibiotic degradation; The particle size of the precious opal in step (1) is 20~1000 nm, and the mass ratio of the precious opal to SPC is 1~4:

1. The piezoelectric catalytic reaction in step (2) is carried out under microwave conditions with a power of 100~700 W and the temperature of the piezoelectric catalytic reaction is 20~60℃.

2. The method for enhancing the degradation of antibiotics in water by SPC with precious opal piezocatalysis according to claim 1, characterized in that, The solid-liquid ratio of the precious opal and SPC mixture added to the water containing antibiotics in step (1) is (10~100) mg: (5~50) ml.

3. The method for enhancing the degradation of antibiotics in water by SPC with precious opal piezocatalysis according to claim 1, characterized in that, In step (1), the concentration of antibiotics in the water containing antibiotics is 5~1000 mg / L.

4. The method for enhancing the degradation of antibiotics in water by SPC with precious opal piezocatalysis according to claim 1, characterized in that, The antibiotic in question is tetracycline.

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