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Method for treating antibiotic wastewater by using carbon nitride/tungsten trioxide/zinc sulfide double-Z type composite photocatalyst

A technology of antibiotic wastewater and tungsten trioxide, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of small specific surface area, poor photocorrosion resistance, light Catalytic activity is difficult to improve and other problems, to achieve the effect of improving visible light absorption capacity and specific surface area, strong redox ability, effective transfer and separation

Active Publication Date: 2022-04-12
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing graphitic carbon nitride (g-C3N4) or heterojunction catalysts based on graphitic carbon nitride still have insufficient visible light absorption ability and photocatalytic activity. At the same time, it is difficult to achieve uniform loading or dispersion of the modified materials in the existing graphite carbon nitride composite materials, and the result is that the graphite carbon nitride composite materials thus obtained are still small in specific surface area , fewer reactive sites, poor structural stability, and difficulty in improving photocatalytic activity

Method used

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  • Method for treating antibiotic wastewater by using carbon nitride/tungsten trioxide/zinc sulfide double-Z type composite photocatalyst
  • Method for treating antibiotic wastewater by using carbon nitride/tungsten trioxide/zinc sulfide double-Z type composite photocatalyst
  • Method for treating antibiotic wastewater by using carbon nitride/tungsten trioxide/zinc sulfide double-Z type composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for treating antibiotic wastewater by utilizing carbon nitride / tungsten trioxide / zinc sulfide double Z-type composite photocatalyst, comprising the following steps:

[0043] Weigh carbon nitride / tungsten trioxide / zinc sulfide double Z type composite photocatalyst (3-CWZ, 5-CWZ and 7-CWZ), carbon nitride material (g-C 3 N 4 ), tungsten trioxide material (WO 3 ), zinc sulfide material (ZnS), carbon nitride / tungsten trioxide composite material (g-C3N4 / WO3), carbon nitride zinc sulfide composite material (g-C 3 N 4 / ZnS), tungsten trioxide / zinc sulfide composites (WO 3 / ZnS), 20 mg each, were added to 100 mL tetracycline (TC) aqueous solution with a concentration of 10 mg / L and a pH of 6, oscillating and adsorbing under dark conditions for 1 h to reach adsorption equilibrium, and then irradiating with visible light with a wavelength >420 nm Perform photocatalytic degradation for 60 minutes to complete the treatment of tetracycline (TC) aqueous solution.

[004...

Embodiment 2

[0095] A method for treating antibiotic wastewater by utilizing carbon nitride / tungsten trioxide / zinc sulfide double Z-type composite photocatalyst, comprising the following steps:

[0096] Through the temperature control system, the temperature of the tetracycline pollutant solution is adjusted to be 30°C, and the pH value of the tetracycline pollutant solution is adjusted to 3, 5, 7, 9, and 11 using sodium hydroxide solution and hydrochloric acid solution; The carbon nitride / tungsten trioxide / zinc sulfide double Z-type composite photocatalyst (5-CWZ) in example 1, each 0.02g, add respectively in the tetracycline waste water of 100mL of different pH values, initial concentration is 10mg / L, Magnetic stirring was carried out for 60 minutes, and after adsorption equilibrium was reached, photocatalytic degradation was carried out for 60 minutes under the irradiation of visible light with a wavelength >420nm, and the adsorption-photocatalytic treatment of tetracycline (TC) wastewat...

Embodiment 3

[0101] Utilizing carbon nitride / tungsten trioxide / zinc sulfide double Z-type composite photocatalyst to recycle antibiotic wastewater, including the following steps:

[0102] (1) Weigh 0.02g of carbon nitride / tungsten trioxide / zinc sulfide double Z-type composite photocatalyst (5-CWZ) in Example 1, add to 100mL, initial concentration is 10mg / L, pH is 6 tetracycline In the waste water, the reaction system is obtained.

[0103] (2) Place the reaction system obtained in step (1) (tetracycline wastewater with 5-CWZ added) on a magnetic stirrer, and stir for 1 h in the dark to achieve adsorption equilibrium, and take 4 mL of the solution to represent the initial solution to be degraded. , that is, the solution when the reaction time is 0min, measure its concentration with a UV-visible spectrophotometer, and record it as C 0 .

[0104] (3) The remaining solution of step (2) is subjected to photocatalytic reaction under visible light, and after 60 minutes of reaction, 4 mL of the s...

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Abstract

The invention discloses a method for treating antibiotic wastewater by using a carbon nitride / tungsten trioxide / zinc sulfide double-Z type composite photocatalyst, and the antibiotic wastewater is treated by using the carbon nitride / tungsten trioxide / zinc sulfide double-Z type composite photocatalyst. Wherein the carbon nitride / tungsten trioxide / zinc sulfide double-Z-type composite photocatalyst comprises carbon nitride, tungsten trioxide and zinc sulfide, tungsten trioxide is modified on carbon nitride to form a carbon nitride / tungsten trioxide composite material, zinc sulfide is loaded on the carbon nitride / tungsten trioxide composite material, and the mass percentage of zinc sulfide in the carbon nitride / tungsten trioxide / zinc sulfide double-Z-type composite photocatalyst is 1-8%. According to the method, the carbon nitride / tungsten trioxide / zinc sulfide double-Z type composite photocatalyst is adopted to carry out oscillation adsorption and photocatalytic degradation treatment on the antibiotic wastewater, so that the antibiotics in the wastewater can be effectively removed, and the method has the advantages of high removal rate, convenience in operation, low cost, no secondary pollution and the like; the method has high practical value and good application prospect.

Description

technical field [0001] The invention belongs to the field of waste water treatment and relates to a method for treating antibiotic waste water, in particular to a method for treating antibiotic waste water by using a carbon nitride / tungsten trioxide / zinc sulfide double Z-type composite photocatalyst. Background technique [0002] Antibiotics are drugs used to treat microbial infectious diseases, and they have been widely used in the treatment of human and animal diseases, as well as in aquaculture and livestock breeding. The widespread use of antibiotics, especially the overuse or abuse of antibiotics, has aroused public concern, because during the production and application of antibiotics, a large amount of antibiotic-containing wastewater will be produced and discharged into the environment, causing serious pollution, and residual Antibiotics are persistent and difficult to degrade through conventional biological treatment methods. As a result, antibiotics are frequently ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30B01J27/24B01J35/10
CPCY02W10/37
Inventor 吴志斌孙海波秦普丰梁运姗龚小敏蒋艺李雪滢左明鑫邹冬生
Owner HUNAN AGRICULTURAL UNIV
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