Water purification catalyst

Abstract

The invention relates to the technical field of water purification, in particular to a water purification catalyst which is prepared by the following steps: S1, weighing ingredients such as manganese dioxide, aluminum oxide, titanium dioxide, nickel oxide and pore-forming agent powder, and then respectively sieving the powder with a 200-mesh sieve; s2, the powder screened by the screen is added into a kneading machine according to the proportion and mixed for 8 h, and pug is taken out after even mixing; s3, the pug is put into a sealing tank to be aged for 24 h; s4, after the water is uniformly distributed in the pug, putting the pug into a ceramic tube extruding machine, controlling the extrusion pressure to be 10MPa, and extruding to obtain a single-cylinder-shaped green body; and S5, the formed green body is put into a drying oven at the temperature of 100-120 DEG C to be dried for 120 h, and moisture is removed. The catalyst prepared by the invention shows strong decomposition capability on various complex organic pollutants, and chromophoric groups in wastewater molecules are destroyed through catalyst reaction, so that the wastewater molecules are decomposed into water, carbon dioxide and harmless inorganic small molecules; the harm to the ecological environment and human health is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, in particular to a water purification catalyst. Background Art

[0002] With the acceleration of industrialization and population growth, water pollution is becoming increasingly serious. Various pollutants in water pose a huge threat to human health and the ecological environment.

[0003] Some water purification catalysts currently on the market have problems such as low activity, poor selectivity, insufficient stability, or high preparation costs, making them difficult to be widely used. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a water purification catalyst with high catalytic activity, high stability and relatively low cost, which can quickly and efficiently decompose various pollutants in water, improve the recycling rate and safety of water resources, and promote the development and progress of water treatment technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A water purification catalyst comprises the following steps:

[0007] S1. Weigh the ingredients of manganese dioxide, aluminum oxide, titanium dioxide, nickel oxide and pore-forming agent powder, and then pass these powders through a 200-mesh sieve respectively;

[0008] S2, add the powder screened by the sieve into the kneader according to the proportion and mix for 8 hours, and take out the mud after uniform mixing;

[0009] S3. Place the clay into a sealed jar and age for 24 hours;

[0010] S4. After the water is evenly distributed in the clay, the clay is placed in a ceramic tube extruder and the extrusion pressure is controlled at 10 MPa to obtain a single cylindrical green embryo;

[0011] S5. Place the formed green embryo in an oven at 100-120° C. and dry for 120 hours to remove moisture;

[0012] S6. The dried sample is calcined in a muffle furnace;

[0013] S7. Grind the calcined sample into a grinder to obtain a finished water treatment catalyst.

[0014] Preferably, in step S2, the added powders are added in a mass ratio of 20-30 parts of manganese dioxide, 10-20 parts of aluminum oxide, 10-20 parts of titanium dioxide, 5-10 parts of nickel oxide and 50-60 parts of pore former.

[0015] Preferably, the mass ratio of the added powder is 20-23 parts of manganese dioxide, 10-13 parts of aluminum oxide, 10-13 parts of titanium dioxide, 5-7 parts of nickel oxide and 50-53 parts of pore former.

[0016] Preferably, the added powders are in a mass ratio of 25 parts of manganese dioxide, 15 parts of aluminum oxide, 15 parts of titanium dioxide, 8 parts of nickel oxide and 55 parts of pore former.

[0017] Preferably, in step S1, the powder is weighed using an electronic balance of model CN-KT001.

[0018] Preferably, in step S4, the outer diameter of the single cylindrical green embryo is 4 mm, and the length of the single cylindrical green embryo is 1 cm.

[0019] Preferably, in step S5, the calcination temperature is 550° C., the calcination time is 8 h, and the heating rate is controlled at 5-8° C. / min.

[0020] Compared with the existing technology, the advantages of the present invention are:

[0021] 1. The catalyst has demonstrated a strong decomposition ability for a variety of complex organic pollutants. Through the catalytic reaction, the chromophores in the wastewater molecules are destroyed, causing them to decompose into water, carbon dioxide and harmless inorganic small molecules, reducing the harm to the ecological environment and human health.

[0022] 2. The catalyst will not cause secondary pollution during the treatment process, which meets the requirements of green chemistry and sustainable development, and helps promote more environmentally friendly and efficient development of the entire water purification industry.

[0023] 3. In multiple recycling experiments, the catalyst's activity was effectively restored after more than 10 cycles of regeneration, maintaining its significant removal efficiency for various pollutants. This not only reduces the frequency and cost of catalyst replacement but also reduces solid waste generation, aligning with the concept of sustainable development and environmental protection. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] A water purification catalyst comprises the following steps:

[0026] S1. Weigh the ingredients of manganese dioxide, aluminum oxide, titanium dioxide, nickel oxide and pore-forming agent powder, and then pass these powders through a 200-mesh sieve respectively;

[0027] S2, add the powder screened by the sieve into the kneader according to the proportion and mix for 8 hours, and take out the mud after uniform mixing;

[0028] S3. Place the clay into a sealed jar and age for 24 hours;

[0029] S4. After the water is evenly distributed in the clay, the clay is placed in a ceramic tube extruder and the extrusion pressure is controlled at 10 MPa to obtain a single cylindrical green embryo;

[0030] S5. Place the formed green embryo in an oven at 100-120° C. and dry for 120 hours to remove moisture;

[0031] S6. The dried sample is calcined in a muffle furnace;

[0032] S7. Grind the calcined sample into a grinder to obtain a finished water treatment catalyst.

[0033] In step S1, powder is weighed using an electronic balance model CN-KT001.

[0034] In step S4, the outer diameter of the single cylindrical green embryo is 4 mm, and the length of the single cylindrical green embryo is 1 cm.

[0035] In step S5, the calcination temperature is 550°C, the calcination time is 8 hours, and the heating rate is controlled at 5-8°C / min.

[0036] The following is an explanation through specific embodiments.

[0037] Example 1

[0038] S1. Weigh the ingredients of manganese dioxide, aluminum oxide, titanium dioxide, nickel oxide and pore-forming agent powder, and then pass these powders through a 200-mesh sieve respectively;

[0039] S2, add 20 parts of manganese dioxide, 10 parts of aluminum oxide, 10 parts of titanium dioxide, 5 parts of nickel oxide and 50 parts of pore-forming agent into a kneader and mix for 8 hours. After uniform mixing, take out the mud;

[0040] S3. Place the clay into a sealed jar and age for 24 hours;

[0041] S4. After the water is evenly distributed in the clay, the clay is placed in a ceramic tube extruder and the extrusion pressure is controlled at 10 MPa to obtain a single cylindrical green embryo;

[0042] S5. Place the formed green embryo in an oven at 100-120° C. and dry for 120 hours to remove moisture;

[0043] S6. The dried sample is calcined in a muffle furnace;

[0044] S7. Grind the calcined sample into a grinder to obtain a finished water treatment catalyst.

[0045] Example 2

[0046] S1. Weigh the ingredients of manganese dioxide, aluminum oxide, titanium dioxide, nickel oxide and pore-forming agent powder, and then pass these powders through a 200-mesh sieve respectively;

[0047] S2, add 23 parts of manganese dioxide, 13 parts of aluminum oxide, 13 parts of titanium dioxide, 7 parts of nickel oxide and 53 parts of pore-forming agent into a kneader and mix for 8 hours. After uniform mixing, take out the mud;

[0048] S3. Place the clay into a sealed jar and age for 24 hours;

[0049] S4. After the water is evenly distributed in the clay, the clay is placed in a ceramic tube extruder and the extrusion pressure is controlled at 10 MPa to obtain a single cylindrical green embryo;

[0050] S5. Place the formed green embryo in an oven at 100-120° C. and dry for 120 hours to remove moisture;

[0051] S6. The dried sample is calcined in a muffle furnace;

[0052] S7. Grind the calcined sample into a grinder to obtain a finished water treatment catalyst.

[0053] Example 3

[0054] S1. Weigh the ingredients of manganese dioxide, aluminum oxide, titanium dioxide, nickel oxide and pore-forming agent powder, and then pass these powders through a 200-mesh sieve respectively;

[0055] S2, add 25 parts of manganese dioxide, 15 parts of aluminum oxide, 15 parts of titanium dioxide, 8 parts of nickel oxide and 55 parts of pore-forming agent into a kneader and mix for 8 hours. After uniform mixing, take out the mud;

[0056] S3. Place the clay into a sealed jar and age for 24 hours;

[0057] S4. After the water is evenly distributed in the clay, the clay is placed in a ceramic tube extruder and the extrusion pressure is controlled at 10 MPa to obtain a single cylindrical green embryo;

[0058] S5. Place the formed green embryo in an oven at 100-120° C. and dry for 120 hours to remove moisture;

[0059] S6. The dried sample is calcined in a muffle furnace;

[0060] S7. Grind the calcined sample into a grinder to obtain a finished water treatment catalyst.

[0061] Example 4

[0062] S1. Weigh the ingredients of manganese dioxide, aluminum oxide, titanium dioxide, nickel oxide and pore-forming agent powder, and then pass these powders through a 200-mesh sieve respectively;

[0063] S2, add 28 parts of manganese dioxide, 18 parts of aluminum oxide, 18 parts of titanium dioxide, 8 parts of nickel oxide and 58 parts of pore-forming agent into a kneader and mix for 8 hours. After uniform mixing, take out the mud;

[0064] S3. Place the clay into a sealed jar and age for 24 hours;

[0065] S4. After the water is evenly distributed in the clay, the clay is placed in a ceramic tube extruder and the extrusion pressure is controlled at 10 MPa to obtain a single cylindrical green embryo;

[0066] S5. Place the formed green embryo in an oven at 100-120° C. and dry for 120 hours to remove moisture;

[0067] S6. The dried sample is calcined in a muffle furnace;

[0068] S7. Grind the calcined sample into a grinder to obtain a finished water treatment catalyst.

[0069] Example 5

[0070] S1. Weigh the ingredients of manganese dioxide, aluminum oxide, titanium dioxide, nickel oxide and pore-forming agent powder, and then pass these powders through a 200-mesh sieve respectively;

[0071] S2, add 30 parts of manganese dioxide, 20 parts of aluminum oxide, 20 parts of titanium dioxide, 10 parts of nickel oxide and 60 parts of pore-forming agent into a kneader and mix for 8 hours. After uniform mixing, take out the mud;

[0072] S3. Place the clay into a sealed jar and age for 24 hours;

[0073] S4. After the water is evenly distributed in the clay, the clay is placed in a ceramic tube extruder and the extrusion pressure is controlled at 10 MPa to obtain a single cylindrical green embryo;

[0074] S5. Place the formed green embryo in an oven at 100-120° C. and dry for 120 hours to remove moisture;

[0075] S6. The dried sample is calcined in a muffle furnace;

[0076] S7. Grind the calcined sample into a grinder to obtain a finished water treatment catalyst.

[0077] The removal rates of chromophores in wastewater using the catalysts prepared in the above examples are shown in the following table:

[0078] Removal rate of chromophores in wastewater (%) Example 1 95 Example 2 96 Example 3 99 Example 4 95 Example 5 97

[0079] In summary, the catalyst prepared by Example 3 has the highest removal rate of chromophores in wastewater and the best effect on wastewater purification.

[0080] The catalyst prepared by the present invention exhibits a strong ability to decompose a variety of complex organic pollutants. Through the catalytic reaction, the chromophores in the wastewater molecules are destroyed, causing them to decompose into water, carbon dioxide, and harmless inorganic small molecules. This reduces the harm to the ecological environment and human health. At the same time, the catalyst does not cause secondary pollution during the treatment process, meets the requirements of green chemistry and sustainable development, and helps promote more environmentally friendly and efficient development of the entire water purification industry.

[0081] Furthermore, in multiple recycling experiments, the catalyst's activity was effectively restored after more than 10 cycles of regeneration, maintaining its significant removal efficiency against various pollutants. This not only reduces the frequency and cost of catalyst replacement but also reduces solid waste generation, aligning with the concept of sustainable development and environmental protection.

[0082] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A water purification catalyst, characterized in that: The steps include: S1. Weigh the ingredients of manganese dioxide, aluminum oxide, titanium dioxide, nickel oxide and pore-forming agent powder, and then pass these powders through a 200-mesh sieve respectively; S2, add the powder screened by the sieve into the kneader according to the proportion and mix for 8 hours, and take out the mud after uniform mixing; S3. Place the clay into a sealed jar and age for 24 hours; S4. After the water is evenly distributed in the clay, the clay is placed in a ceramic tube extruder and the extrusion pressure is controlled at 10 MPa to obtain a single cylindrical green embryo; S5. Place the formed green embryo in an oven at 100-120° C. and dry for 120 hours to remove moisture; S6. The dried sample is calcined in a muffle furnace; S7. Grind the calcined sample into a grinder to obtain a finished water treatment catalyst.

2. The water treatment catalyst according to claim 1, characterized in that In step S2, the added powders are added in a mass ratio of 20-30 parts of manganese dioxide, 10-20 parts of aluminum oxide, 10-20 parts of titanium dioxide, 5-10 parts of nickel oxide and 50-60 parts of pore former.

3. The water treatment catalyst according to claim 2, characterized in that The mass ratio of the added powders is 20-23 parts of manganese dioxide, 10-13 parts of aluminum oxide, 10-13 parts of titanium dioxide, 5-7 parts of nickel oxide and 50-53 parts of pore-forming agent.

4. The water treatment catalyst according to claim 2, characterized in that The mass ratio of the added powders is 25 parts of manganese dioxide, 15 parts of aluminum oxide, 15 parts of titanium dioxide, 8 parts of nickel oxide and 55 parts of pore former.

5. The water treatment catalyst according to claim 1, characterized in that In step S1, powder is weighed using an electronic balance model CN-KT001.

6. The water treatment catalyst according to claim 1, characterized in that In step S4, the outer diameter of the single cylindrical green embryo is 4 mm, and the length of the single cylindrical green embryo is 1 cm.

7. The water treatment catalyst according to claim 1, characterized in that In step S5, the calcination temperature is 550° C., the calcination time is 8 hours, and the heating rate is controlled at 5-8° C. / min.