Novel graphite phase carbon nitride ultrasonic catalytic material
By using graphite phase carbon nitride ultrasonic catalytic materials for ultrasonic treatment in high-salt wastewater, the problem of difficult degradation of organic matter in high-salt wastewater is solved, and the effects of efficient degradation, energy consumption reduction and salt whiteness improvement are achieved.
Patent Information
- Application Number
- CN202311573686.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-23
- Publication Date
- 2025-05-23
AI Technical Summary
The content of organic matter in high salt wastewater is difficult to effectively degrade through existing biological, chemical and physical treatment methods, and the traditional evaporation methods consume high energy and are prone to cause pipeline blockage.
Urea is used as raw material, and graphite phase carbon nitride ultrasonic catalytic material is calcined in a nitrogen environment through thermal polymerization, and the high-salt wastewater is treated in an ultrasonic environment.
The graphite phase carbon nitride catalytic materials have a high degradation rate of organic matter in high-salt wastewater under ultrasonic environment, the initial condensation temperature is reduced, the whiteness of salt output is increased, and the energy consumption is reduced, which avoids the problem of pipeline blockage.
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Abstract
Description
Technical Field
[0001] Ultrasonic catalytic materials. Background Art
[0002] Water is an indispensable element in human society and economic development. With the development of industry, water pollution problems are becoming more and more serious. The large-scale discharge of industrial wastewater, especially some toxic wastewater, will bury hidden safety hazards to human health. Therefore, it is of great practical significance to degrade wastewater and remove harmful pollutants before discharge.
[0003] High-salt wastewater contains not only high concentrations of salt substances, but also high concentrations of organic matter. If high-salt wastewater is discharged without being treated before discharge, it will cause serious damage to the natural ecological environment and affect human health. Therefore, when discharging high-salt wastewater, it must be treated before discharge, and then discharged after meeting the national sewage discharge standards.
[0004] There are usually three treatment methods for wastewater treatment: chemical treatment, physical treatment and biological treatment.
[0005] Physical treatment is the treatment of organic pollutants in wastewater with the help of mass transfer mechanism. It has the characteristics of high efficiency and simple operation. It is the most widely used of the above three wastewater treatment methods, such as mucosal filtration, membrane separation, adsorption, etc.
[0006] Chemical treatment reaction refers to the conversion of organic matter into harmless molecules through chemical reactions of organic matter. Common treatment methods include ozone, supercritical, pulse discharge, etc. The reaction kinetics between organic matter in wastewater and chemical reagents determines the efficiency of chemical treatment.
[0007] Biodegradation is the process of using the metabolic potential of microorganisms to remove various organic substances in wastewater. In this process, the effects of microorganisms in anaerobic and aerobic environments are mainly used to transform organic molecules into small molecules with less environmental harm.
[0008] High-salinity wastewater usually cannot be degraded by biological methods due to its high salt content. Chemical and conventional physical methods are also inefficient in treating high-salinity wastewater. Evaporation is usually used to treat high-salinity wastewater, but traditional evaporation methods consume a lot of energy and are prone to cause pipe blockage. The ultrasonic catalytic material of the present invention can effectively degrade the organic content in high-salinity wastewater, reduce the initial coagulation temperature, and improve the whiteness of the salt. Summary of the invention
[0009] The present invention uses urea as a raw material, adopts a thermal polymerization method, and uses zinc chloride as an activator to calcine (carbonization temperature 300-700°C) graphite phase carbon nitride ultrasonic catalytic material under a nitrogen environment. The degradation rate of the graphite phase carbon nitride catalytic material to standard methyl orange in an ultrasonic environment reaches 95% in 25 minutes, and the degradation rate to standard methyl blue solution reaches 98% in 25 minutes. The degradation rate of high-salt methyl blue still reaches 97% after 25 minutes of ultrasonic treatment. The degradation rate of organic matter in high-salt adamantane pharmaceutical wastewater reaches 26.94% after 25 minutes of ultrasonic treatment, which reduces the initial coagulation temperature from 50°C to 45°C (reducing evaporation energy consumption) and improves the whiteness of the salt output. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 (ac) is a test characterization diagram of the graphite phase carbon nitride ultrasonic catalytic material in the present invention. Figure (a) is a Raman spectrum diagram; Figure (b) is a scanning electron microscope microscopic morphology diagram; Figure (c) is an energy dispersive spectrometer EDS result.
[0011] Figure 2 This is a graph showing the degradation effect of ultrasonic treatment of a standard methyl orange solution after adding graphite phase carbon nitride ultrasonic catalytic material.
[0012] Figure 3 This is a graph showing the degradation effects of ultrasonic treatment of standard and high-salt methylene blue solutions after adding graphite phase carbon nitride ultrasonic catalytic material.
[0013] Figure 4 This is a diagram showing the degradation effect of ultrasonic treatment of high-salt methyl orange solution after adding graphite phase carbon nitride ultrasonic catalytic material.
[0014] Figure 5 This is a diagram showing the degradation effect of ultrasonic treatment of high-salt adamantane pharmaceutical wastewater after adding graphite phase carbon nitride ultrasonic catalytic material.
[0015] Figure 6 It is the evaporated crystal salt of high-salt adamantane pharmaceutical wastewater after being treated with graphite phase carbon nitride ultrasonic catalytic material. Significant advantages of graphite carbon nitride as ultrasonic catalytic material
[0016] The invention uses urea as raw material, adopts thermal polymerization method, and uses zinc chloride as activator to calcine (carbonization temperature 300-700°C) graphite phase carbon nitride ultrasonic catalytic material in a nitrogen environment. The preparation method adopted has low condition requirements, convenient operation and large output.
[0017] The prepared material is a porous material with a high specific surface area, which is very conducive to the generation of cavitation bubbles and the adsorption of organic pollutants on the surface during the ultrasonic catalytic process.
[0018] like Figure 2 and Figure 4As shown in the figure, the graphite phase carbon nitride catalytic material has a very good degradation effect on organic matter under ultrasonic environment, and the degradation rate of standard methyl orange and standard methyl blue solution reached more than 95% in 25 minutes, indicating that the material has a good ultrasonic catalytic effect.
[0019] like Figure 3 , Figure 4 and Figure 5 As shown, the graphite phase carbon nitride catalytic material still has a good ultrasonic catalytic degradation effect on organic matter in a high salt environment.
[0020] Graphite-phase carbon nitride catalytic materials can effectively reduce the initial condensation temperature during evaporation and improve the quality of evaporated salt. Therefore, they have good application prospects in the evaporation pretreatment method of high-salt wastewater.
Claims
1. Use urea as raw material, adopt thermal polymerization method, use zinc chloride as activator, and calcine (carbonization temperature 300-700℃) graphite phase carbon nitride ultrasonic catalytic material in nitrogen environment.
2. Add graphite phase carbon nitride material under ultrasonic environment to carry out ultrasonic catalytic degradation treatment of organic solution.
3. The degradation rate of methyl orange by graphite phase carbon nitride catalytic material reached 95% in 25 minutes, and the degradation rate of methyl blue reached 98% in 25 minutes.
4. In a high-salt environment, the degradation rate of methyl blue still reached 97% after 25 minutes.
5. The organic matter degradation rate of high-salt adamantane pharmaceutical wastewater reached 26.94% after 25 minutes of treatment, which reduced the initial coagulation temperature from 50°C to 45°C (reduced evaporation energy consumption) and improved the whiteness of the salt output.