Preparation method of fiber brucite composite manganese dioxide catalyst
By preparing the combination of fiber magnesium composite manganese dioxide catalyst and oxidizing agent, the problem of difficult degradation of organic pollutants in dye industrial wastewater is solved, and the effect of efficient removal of rhodamine B is achieved, improving water quality and reducing environmental pollution is achieved.
Patent Information
- Application Number
- CN202411771248.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-04-15
AI Technical Summary
The prior art is difficult to effectively treat dye industrial wastewater, especially difficult to degrade organic pollutants, resulting in environmental pollution and human health hazards.
The catalyst is prepared by the preparation method of fiber magnesium composite manganese dioxide catalyst, and the catalyst is prepared by screening, drying, adding water, adding manganese chloride and potassium permanganate solution, stirring, standing, suction filtration and re-drying, and combining potassium persulfate or hydrogen peroxide as an oxidant to remove harmful dyes such as rhodamine B.
It has achieved efficient and rapid removal of rhodamine B, with a removal rate of more than 97%, reducing the concentration of harmful organic dyes in the water body, improving water quality, and reducing environmental pollution.
Smart Images
Figure CN119819289A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of wastewater treatment, in particular to a method for preparing a fiber brucite composite manganese dioxide catalyst. Background Art
[0002] Water pollution poses a significant threat to human health and has a negative impact on the sustainable development of society. Among the current water pollution problems, refractory organic pollutants have become one of the main hidden dangers, and dye industry wastewater is one of the important pollution sources.
[0003] Synthetic dyes have been widely used in human life and industrial production. Although they contribute to the richness of visual experience, they have adverse effects on aquatic life, ecological environment and human health. The continuous development of the textile industry has led to a continuous increase in the demand for industrial dyes, and my country has become the largest producer of textile printing and dyeing industry in the world. The printing and dyeing industry has a huge demand for water resources, and the discharge of printing and dyeing wastewater accounts for 35% of the total industrial wastewater discharge in the country. Therefore, the environmental pollution problem caused by the discharge of dye wastewater has become increasingly prominent, and effective measures are urgently needed to solve it.
[0004] Printing and dyeing wastewater has the characteristics of strong biological toxicity, difficulty in treatment, complex composition, and high chromaticity. If it is discharged directly into the water without treatment or treatment that does not meet the standards, it will cause great harm to the environment and human health. At present, only a few large dye enterprises in my country use multi-stage treatment processes to effectively treat dye wastewater, while most dye enterprises only carry out simple primary treatment, and some enterprises even directly discharge wastewater into the water without any treatment. This not only wastes precious resources, but also destroys the ecological balance of the water body, causing a sharp decline in the number of aquatic organisms, triggering a series of environmental pollution chain reactions, and bringing irreversible serious consequences to society.
[0005] Water quality has become an important indicator for measuring the level of social development. Therefore, under the background of global water shortage and environmental pollution, controlling the status of water pollution and developing and implementing low-cost and efficient advanced wastewater treatment technologies are of vital importance to ensure the safe supply of drinking water and the sustainable development of society. Summary of the invention
[0006] In order to solve the above technical problems existing in the prior art, the embodiment of the present invention provides a method for preparing a fiber brucite composite manganese dioxide catalyst. The technical solution is as follows:
[0007] A method for preparing a fibrous brucite composite manganese dioxide catalyst comprises:
[0008] S1, screening the fiber brucite and drying it in a blast drying oven;
[0009] S2, adding water to the dried fiber brucite to obtain a solution, adding manganese chloride solution and potassium permanganate solution to the solution, stirring for a period of time and then standing;
[0010] S3, filtering the solution after stirring and standing in step S2, and drying it in a forced air drying oven to obtain a fibrous brucite composite manganese dioxide catalyst.
[0011] The particle size of the fiber brucite screened in step S1 is less than 5 mm.
[0012] The drying temperature in step S1 is 60° C. to 80° C., and the drying time is 4 h to 6 h.
[0013] In step S2, water is added to the fiber brucite to obtain a solution with a concentration of 8-12 g / L.
[0014] In step S2, the concentration of the manganese chloride solution is 6 mmol / L, and the concentration of the potassium permanganate solution is 4 mmol / L; the mass ratio of the manganese chloride solution to the potassium permanganate solution is 6:4.
[0015] In the step S2, a manganese chloride solution is first added to the fiber brucite suspension, and then a potassium permanganate solution is added dropwise through a constant pressure separatory funnel.
[0016] In step S2, the stirring speed is 30-60 r / min, the stirring time is 4-6 h, and the standing time is 24-36 h.
[0017] In step S3, the drying temperature is 80-100° C. and the drying time is 10-12 hours.
[0018] The removal rate of Rhodamine B in wastewater by the fiber brucite composite manganese dioxide catalyst coordinated oxidant obtained in step S3 is more than 97%.
[0019] The oxidant is one of potassium persulfate and hydrogen peroxide. When used, the catalyst is first put into the wastewater, and then the oxidant is added. Generally, the mass ratio of the catalyst to the oxidant is 1:2.
[0020] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention include at least:
[0021] The above scheme efficiently utilizes fiber brucite composite manganese dioxide to catalyze different oxidants (potassium persulfate, hydrogen peroxide) to remove rhodamine B wastewater, and has a shorter reaction time and higher removal rate. This new type of catalytic material has unique structural characteristics and good physical and chemical properties, which enables it to show excellent performance in wastewater treatment.
[0022] The present invention is an efficient, rapid and economical treatment method for removing rhodamine B wastewater, which can remove 50 mg / l of rhodamine B solution, effectively reduce the concentration of harmful organic dyes in water, improve water quality and reduce environmental pollution. With the deepening of research, the application prospect of fibrous brucite in wastewater treatment is broad, and it is expected to become one of the important technologies in water pollution control in the future. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 The present invention provides a flow chart of a method for preparing a fibrous brucite composite manganese dioxide catalyst according to an embodiment of the present invention. DETAILED DESCRIPTION
[0025] The technical solution of the present invention is described below in conjunction with the accompanying drawings.
[0026] In the embodiments of the present invention, words such as "exemplarily" and "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the word "example" is intended to present the concept in a specific way. In addition, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or it can be either of the two.
[0027] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.
[0028] The embodiment of the present invention provides a method for preparing a fiber brucite composite manganese dioxide catalyst. Figure 1 The preparation method of the fiber brucite composite manganese dioxide catalyst shown in the flow chart may include the following steps:
[0029] S1, screening the fiber brucite and drying it in a blast drying oven;
[0030] S2, adding water to the dried fiber brucite to obtain a solution, adding manganese chloride solution and potassium permanganate solution to the solution, stirring for a period of time and then standing;
[0031] S3, filtering the solution after stirring and standing in step S2, and drying it in a forced air drying oven to obtain a fibrous brucite composite manganese dioxide catalyst.
[0032] This will be described below with reference to specific embodiments.
[0033] Example 1
[0034] according to Figure 1 The process shown in the figure is to screen out the fiber brucite in a 5mm sieve and dry it in a blast drying oven at a temperature of 60°C for 4 hours. 100ml of water is added to 1g of fiber brucite, and 6mmol / L manganese chloride solution is added to the fiber brucite suspension, and 4mmol / L potassium permanganate solution is slowly added, and stirred at 45r / min for 4 hours and 24 hours. Finally, the material of fiber brucite composite manganese dioxide is obtained by suction filtration and drying in a blast drying oven at a temperature of 80°C for 12 hours, and potassium persulfate is catalyzed to remove 50mg / l of rhodamine B solution. After 10 minutes at room temperature, the removal rate of rhodamine B solution is 99.3%.
[0035] Example 2
[0036] according to Figure 1 The process shown in the figure is to screen out the fiber brucite in a 5mm sieve and dry it in a blast drying oven at a temperature of 60°C for 4 hours. 100ml of water is added to 1g of fiber brucite, and 6mmol / L manganese chloride solution is added to the fiber brucite suspension. Then 4mmol / L potassium permanganate solution is slowly added and stirred at 45r / min for 4 hours and 24 hours. Finally, the material of fiber brucite composite manganese dioxide is obtained by suction filtration and drying in a blast drying oven at a temperature of 80°C for 12 hours, and catalyzing hydrogen peroxide to remove 50mg / l of rhodamine B solution. After 10 minutes at room temperature, the removal rate of rhodamine B solution is 97.6%.
[0037] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. A method for preparing a fiber brucite composite manganese dioxide catalyst, characterized in that: The method comprises: S1, screening the fiber brucite and drying it in a blast drying oven; S2, adding water to the dried fiber brucite to obtain a solution, adding manganese chloride solution and potassium permanganate solution to the solution, stirring for a period of time and then standing; S3, filtering the solution after stirring and standing in step S2, and drying it in a forced air drying oven to obtain a fibrous brucite composite manganese dioxide catalyst.
2. The method for preparing the fiber brucite composite manganese dioxide catalyst according to claim 1, characterized in that: The particle size of the fiber brucite screened in step S1 is less than 5 mm.
3. The method for preparing the fiber brucite composite manganese dioxide catalyst according to claim 1, characterized in that: The drying temperature in step S1 is 60° C. to 80° C., and the drying time is 4 h to 6 h.
4. The method for preparing the fiber brucite composite manganese dioxide catalyst according to claim 1, characterized in that: In step S2, water is added to the fiber brucite to obtain a solution with a concentration of 8 g / L to 12 g / L.
5. The method for preparing the fiber brucite composite manganese dioxide catalyst according to claim 1, characterized in that: In step S2, the concentration of the manganese chloride solution is 6 mmol / L, and the concentration of the potassium permanganate solution is 4 mmol / L; the mass ratio of the manganese chloride solution to the potassium permanganate solution is 6:
4.
6. The method for preparing the fiber brucite composite manganese dioxide catalyst according to claim 1, characterized in that: In the step S2, a manganese chloride solution is first added to the fiber brucite suspension, and then a potassium permanganate solution is added dropwise using a constant pressure separatory funnel.
7. The method for preparing the fiber brucite composite manganese dioxide catalyst according to claim 1, characterized in that: In step S2, the stirring speed is 30-60 r / min, the stirring time is 4-6 h, and the standing time is 24-36 h.
8. The method for preparing the fiber brucite composite manganese dioxide catalyst according to claim 1, characterized in that: In step S3, the drying temperature is 80° C. to 100° C., and the drying time is 10 h to 12 h.
9. The method for preparing the fiber brucite composite manganese dioxide catalyst according to claim 1, characterized in that: The fibrous brucite composite manganese dioxide catalyst coordinated oxidant obtained in step S3 has a removal rate of more than 97% for rhodamine B in wastewater.