A method for preparing honeycomb filler for water treatment

Abstract

The present invention relates to a method for preparing a water treatment honeycomb filler, and belongs to the field of water treatment materials. The present invention coats a neodymium tungstate-iron tungstate composite active layer on the surface of a stainless steel honeycomb filler, wherein the mass percentages of neodymium tungstate and iron tungstate in the water treatment honeycomb filler are 1.8% to 1.9% and 1.5% to 1.6%, respectively. The composite active layer is tightly combined with the stainless steel honeycomb filler, and can degrade organic pollutants in water under light, thereby giving full play to the water treatment efficiency of the water treatment honeycomb filler. The water treatment honeycomb filler can be used for the purification of organic pollutants in industrial and civil sewage, and does not require frequent regeneration during use, and is suitable for continuous and stable sewage treatment processes.

Description

Technical Field

[0001] The invention belongs to the field of water treatment materials, and in particular relates to a method for preparing a water treatment honeycomb filler. Background Art

[0002] Honeycomb fillers are primarily used for various sedimentation and grit removal applications and are widely adopted in water treatment systems. They offer a wide range of applications, high treatment efficiency, and a compact footprint, making them suitable for both industrial and domestic wastewater treatment. They are used in tower biofilters, high-load biofilters, contact oxidation tanks, and as microbial carriers in bio-rotating discs, primarily for the biochemical treatment of industrial organic wastewater and municipal sewage.

[0003] Industrial wastewater usually contains organic pollutants that are toxic to microorganisms. When these organic substances adhere to the honeycomb filler, they will greatly inhibit the activity of microorganisms, thereby reducing the efficiency of water treatment. Effective methods must be taken to remove toxic organic pollutants in water. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention aims to provide a method for preparing a water treatment honeycomb filler, which can be used to purify organic pollutants in sewage.

[0005] A method for preparing a water treatment honeycomb filler comprises the following steps:

[0006] Step 1: Acid treatment of stainless steel honeycomb filler

[0007] The stainless steel honeycomb filler was immersed in a 0.12 mol / L hydrochloric acid solution, the solution was heated to 45°C, kept warm for 35 minutes, washed with pure water, and dried at 90°C for 7 hours to obtain an acid-treated stainless steel honeycomb filler;

[0008] Step 2: Coating with Iron Tungstate

[0009] 9.2-10.5 g of ammonium metatungstate, 6.5-7.1 g of sodium dihydrogen phosphate, and 5.1-5.6 g of sodium bicarbonate were added to 600 mL of pure water and stirred to form a solution A; the acid-treated stainless steel honeycomb filler described in step 1 was immersed in the solution A, and the solution was heated to 85° C., kept warm for 160 minutes, dried at 130° C. for 5 hours, and then calcined at 450-480° C. for 3.5 hours to obtain a stainless steel honeycomb filler coated with iron tungstate;

[0010] Step 3: Coating with NdT

[0011] 11.0-12.5 g of ammonium metatungstate, 5.2-5.7 g of glycerol, and 6.3-6.9 g of emulsifier OP-10 were added to 600 mL of ethanol and stirred to form solution B; 7.3-8.2 g of neodymium nitrate and 3.5-3.8 g of sodium dihydrogen phosphate were added to 200 mL of pure water and stirred to form solution C; solution B and solution C were mixed evenly, and the stainless steel honeycomb filler described in step 2 was added, and the solution was heated to 55° C. and kept warm for 30 minutes; the treated stainless steel honeycomb filler was dried at 120° C. for 10 hours, and then calcined at 430-470° C. for 3.5 hours to obtain a water-treated honeycomb filler.

[0012] Furthermore, the stainless steel honeycomb filler in step 1 is made of 304 stainless steel with a material density of 7.93 g / cm 3 The honeycomb filler has a pore size of 40 to 80 mm and is resistant to high temperatures of 800°C.

[0013] Furthermore, the water treatment honeycomb filler is a stainless steel honeycomb filler coated with a neodymium tungstate-iron tungstate composite active layer, wherein the mass percentage of neodymium tungstate in the water treatment honeycomb filler is 1.8% to 1.9%, and the mass percentage of iron tungstate in the water treatment honeycomb filler is 1.5% to 1.6%.

[0014] Furthermore, the water treatment honeycomb filler has a sheet thickness of 0.55 to 0.65 mm and a specific surface area of ​​105 to 120 m 2 / m 3 .

[0015] A method for preparing a water treatment honeycomb filler has the following advantages compared with the prior art:

[0016] The present invention uses a stainless steel honeycomb filler as a base material, and coats its surface with a composite active layer of neodymium tungstate-iron tungstate. Because the stainless steel honeycomb filler participates in the reaction process of the iron tungstate active layer, the composite active layer is tightly bonded to the stainless steel honeycomb filler. The neodymium tungstate-iron tungstate composite active layer can degrade organic pollutants in water under illumination, reducing the accumulation of organic pollutants on the surface of the water treatment honeycomb filler, thereby fully utilizing the efficiency of the water treatment honeycomb filler in the water treatment process. The water treatment honeycomb filler can be used for the purification of organic pollutants in industrial and domestic wastewater, and does not require frequent regeneration during use, making it suitable for continuous and stable wastewater treatment processes. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not intended to limit the present invention. The reagents or instruments used without indicating the manufacturer are all conventional commercial products.

[0018] Example 1

[0019] A method for preparing a water treatment honeycomb filler comprises the following steps:

[0020] Step 1: Acid treatment of stainless steel honeycomb filler

[0021] Immerse the stainless steel honeycomb filler in 0.12 mol / L hydrochloric acid solution, heat the solution to 45°C, and keep it warm for 35 minutes; take out the acid-treated stainless steel honeycomb filler, wash it with pure water, and dry it at 90°C for 7 hours;

[0022] Step 2: Coating with Iron Tungstate

[0023] 9.2 g of ammonium metatungstate, 6.5 g of sodium dihydrogen phosphate, and 5.1 g of sodium bicarbonate were added to 600 mL of pure water and stirred to form solution A; the acid-treated stainless steel honeycomb filler of step 1 was immersed in solution A, and the solution was heated to 85°C and kept warm for 160 minutes; the treated stainless steel honeycomb filler was dried at 130°C for 5 hours, and then calcined at 450°C for 3.5 hours to obtain a stainless steel honeycomb filler coated with iron tungstate.

[0024] Step 3: Coating with NdT

[0025] 11.0 g of ammonium metatungstate, 5.2 g of glycerol, and 6.3 g of emulsifier OP-10 were added to 600 mL of ethanol and stirred to form solution B; 7.3 g of neodymium nitrate and 3.5 g of sodium dihydrogen phosphate were added to 200 mL of pure water and stirred to form solution C; solution B and solution C were mixed evenly, and then the stainless steel honeycomb filler in step 2 was immersed in the mixed solution, and the solution was heated to 55° C. and kept warm for 30 minutes; the treated stainless steel honeycomb filler was dried at 120° C. for 10 hours, and then calcined at 430° C. for 3.5 hours to obtain a water-treated honeycomb filler.

[0026] The water treatment honeycomb filler prepared in this embodiment has a thickness of 0.55 mm and a specific surface area of ​​105 m 2 / m 3 The mass percentages of neodymium tungstate and iron tungstate in the water treatment honeycomb filler are 1.8% and 1.5% respectively.

[0027] Example 2

[0028] A method for preparing a water treatment honeycomb filler comprises the following steps:

[0029] Step 1: Acid treatment of stainless steel honeycomb filler

[0030] The stainless steel honeycomb filler was immersed in a 0.12 mol / L hydrochloric acid solution, and the solution was heated to 45°C and kept warm for 35 minutes. The stainless steel honeycomb filler after acid treatment was taken out, washed with pure water, and dried at 90°C for 7 hours.

[0031] Step 2: Coating with Iron Tungstate

[0032] 9.6 g of ammonium metatungstate, 6.6 g of sodium dihydrogen phosphate, and 5.2 g of sodium bicarbonate were added to 600 mL of pure water and stirred to form solution A; the acid-treated stainless steel honeycomb filler of step 1 was immersed in solution A, and the solution was heated to 85°C and kept warm for 160 minutes; the treated stainless steel honeycomb filler was dried at 130°C for 5 hours, and then calcined at 460°C for 3.5 hours to obtain a stainless steel honeycomb filler coated with iron tungstate.

[0033] Step 3: Coating with NdT

[0034] 11.3 g of ammonium metatungstate, 5.3 g of glycerol, and 6.4 g of emulsifier OP-10 were added to 600 mL of ethanol and stirred to form solution B; 7.5 g of neodymium nitrate and 3.6 g of sodium dihydrogen phosphate were added to 200 mL of pure water and stirred to form solution C; solution B and solution C were mixed evenly, and then the stainless steel honeycomb filler in step 2 was immersed in the mixed solution, and the solution was heated to 55° C. and kept warm for 30 minutes; the treated stainless steel honeycomb filler was dried at 120° C. for 10 hours, and then calcined at 440° C. for 3.5 hours to obtain a water-treated honeycomb filler.

[0035] The water treatment honeycomb filler prepared in this embodiment has a thickness of 0.58 mm and a specific surface area of ​​109 m 2 / m 3 The mass percentages of neodymium tungstate and iron tungstate in the water treatment honeycomb filler are 1.82% and 1.53% respectively.

[0036] Example 3

[0037] A method for preparing a water treatment honeycomb filler comprises the following steps:

[0038] Step 1: Acid treatment of stainless steel honeycomb filler

[0039] The stainless steel honeycomb filler was immersed in a 0.12 mol / L hydrochloric acid solution, and the solution was heated to 45°C and kept warm for 35 minutes. The stainless steel honeycomb filler after acid treatment was taken out, washed with pure water, and dried at 90°C for 7 hours.

[0040] Step 2: Coating with Iron Tungstate

[0041] 9.9 g of ammonium metatungstate, 6.8 g of sodium dihydrogen phosphate, and 5.3 g of sodium bicarbonate were added to 600 mL of pure water and stirred to form solution A; the acid-treated stainless steel honeycomb filler of step 1 was immersed in solution A, and the solution was heated to 85°C and kept warm for 160 minutes; the treated stainless steel honeycomb filler was dried at 130°C for 5 hours, and then calcined at 465°C for 3.5 hours to obtain a stainless steel honeycomb filler coated with iron tungstate.

[0042] Step 3: Coating with NdT

[0043] 11.6 g of ammonium metatungstate, 5.4 g of glycerol, and 6.6 g of emulsifier OP-10 were added to 600 mL of ethanol and stirred to form solution B; 7.8 g of neodymium nitrate and 3.6 g of sodium dihydrogen phosphate were added to 200 mL of pure water and stirred to form solution C; solution B and solution C were mixed evenly, and then the stainless steel honeycomb filler in step 2 was immersed in the mixed solution, and the solution was heated to 55° C. and kept warm for 30 minutes; the treated stainless steel honeycomb filler was dried at 120° C. for 10 hours, and then calcined at 450° C. for 3.5 hours to obtain a water-treated honeycomb filler.

[0044] The water treatment honeycomb filler prepared in this embodiment has a thickness of 0.59 mm and a specific surface area of ​​112 m 2 / m 3 The mass percentages of neodymium tungstate and iron tungstate in the water treatment honeycomb filler are 1.85% and 1.55% respectively.

[0045] Example 4

[0046] A method for preparing a water treatment honeycomb filler comprises the following steps:

[0047] Step 1: Acid treatment of stainless steel honeycomb filler

[0048] The stainless steel honeycomb filler was immersed in a 0.12 mol / L hydrochloric acid solution, and the solution was heated to 45°C and kept warm for 35 minutes. The stainless steel honeycomb filler after acid treatment was taken out, washed with pure water, and dried at 90°C for 7 hours.

[0049] Step 2: Coating with Iron Tungstate

[0050] 10.2 g of ammonium metatungstate, 6.9 g of sodium dihydrogen phosphate, and 5.5 g of sodium bicarbonate were added to 600 mL of pure water and stirred to form solution A; the acid-treated stainless steel honeycomb filler of step 1 was immersed in solution A, and the solution was heated to 85°C and kept warm for 160 minutes; the treated stainless steel honeycomb filler was dried at 130°C for 5 hours, and then calcined at 470°C for 3.5 hours to obtain a stainless steel honeycomb filler coated with iron tungstate.

[0051] Step 3: Coating with NdT

[0052] 12.1 g of ammonium metatungstate, 5.5 g of glycerol, and 6.7 g of emulsifier OP-10 were added to 600 mL of ethanol and stirred to form solution B; 7.9 g of neodymium nitrate and 3.7 g of sodium dihydrogen phosphate were added to 200 mL of pure water and stirred to form solution C; solution B and solution C were mixed evenly, and then the stainless steel honeycomb filler in step 2 was immersed in the mixed solution, and the solution was heated to 55° C. and kept warm for 30 minutes; the treated stainless steel honeycomb filler was dried at 120° C. for 10 hours, and then calcined at 460° C. for 3.5 hours to obtain a water-treated honeycomb filler.

[0053] The water treatment honeycomb filler prepared in this embodiment has a thickness of 0.61 mm and a specific surface area of ​​115 m 2 / m 3 The mass percentages of neodymium tungstate and iron tungstate in the water treatment honeycomb filler are 1.87% and 1.56% respectively.

[0054] Example 5

[0055] A method for preparing a water treatment honeycomb filler comprises the following steps:

[0056] Step 1: Acid treatment of stainless steel honeycomb filler

[0057] The stainless steel honeycomb filler was immersed in a 0.12 mol / L hydrochloric acid solution, and the solution was heated to 45°C and kept warm for 35 minutes. The stainless steel honeycomb filler after acid treatment was taken out, washed with pure water, and dried at 90°C for 7 hours.

[0058] Step 2: Coating with Iron Tungstate

[0059] 10.5 g of ammonium metatungstate, 7.1 g of sodium dihydrogen phosphate, and 5.6 g of sodium bicarbonate were added to 600 mL of pure water and stirred to form solution A; the acid-treated stainless steel honeycomb filler of step 1 was immersed in solution A, and the solution was heated to 85° C. and kept warm for 160 minutes; the treated stainless steel honeycomb filler was dried at 130° C. for 5 hours, and then calcined at 480° C. for 3.5 hours to obtain a stainless steel honeycomb filler coated with iron tungstate.

[0060] Step 3: Coating with NdT

[0061] 12.5 g of ammonium metatungstate, 5.7 g of glycerol, and 6.9 g of emulsifier OP-10 were added to 600 mL of ethanol and stirred to form solution B; 8.2 g of neodymium nitrate and 3.8 g of sodium dihydrogen phosphate were added to 200 mL of pure water and stirred to form solution C; solution B and solution C were mixed evenly, and the stainless steel honeycomb filler from step 2 was immersed in the mixed solution, and the solution was heated to 55° C. and kept warm for 30 minutes; the treated stainless steel honeycomb filler was dried at 120° C. for 10 hours, and then calcined at 470° C. for 3.5 hours to obtain a water-treated honeycomb filler.

[0062] The water treatment honeycomb filler prepared in this embodiment has a thickness of 0.65 mm and a specific surface area of ​​120 m 2 / m 3 The mass percentages of neodymium tungstate and iron tungstate in the water treatment honeycomb filler are 1.9% and 1.6% respectively.

[0063] The above technical solution illustrates the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes and modifications made to the above technical solution based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A method for preparing a water treatment honeycomb filler, characterized in that: The process steps include: Step 1: Acid treatment of stainless steel honeycomb filler The stainless steel honeycomb filler was immersed in a 0.12 mol / L hydrochloric acid solution, the solution was heated to 45°C, kept warm for 35 minutes, washed with pure water, and dried at 90°C for 7 hours to obtain an acid-treated stainless steel honeycomb filler; Step 2: Coating with Iron Tungstate 9.2-10.5 g of ammonium metatungstate, 6.5-7.1 g of sodium dihydrogen phosphate, and 5.1-5.6 g of sodium bicarbonate were added to 600 mL of pure water and stirred to form a solution A; the acid-treated stainless steel honeycomb filler described in step 1 was immersed in the solution A, and the solution was heated to 85° C., kept warm for 160 minutes, dried at 130° C. for 5 hours, and then calcined at 450-480° C. for 3.5 hours to obtain a stainless steel honeycomb filler coated with iron tungstate; Step 3: Coating with NdT 11.0-12.5 g of ammonium metatungstate, 5.2-5.7 g of glycerol, and 6.3-6.9 g of emulsifier OP-10 were added to 600 mL of ethanol and stirred to form solution B; 7.3-8.2 g of neodymium nitrate and 3.5-3.8 g of sodium dihydrogen phosphate were added to 200 mL of pure water and stirred to form solution C; solution B and solution C were mixed evenly, and the stainless steel honeycomb filler described in step 2 was added, and the solution was heated to 55° C. and kept warm for 30 minutes; the treated stainless steel honeycomb filler was dried at 120° C. for 10 hours, and then calcined at 430-470° C. for 3.5 hours to obtain a water-treated honeycomb filler.

2. The method for preparing a water treatment honeycomb filler according to claim 1, wherein: The stainless steel honeycomb filler in step 1 is made of 304 stainless steel with a density of 7.93 g / cm 3 The honeycomb filler has a pore size of 40 to 80 mm and is resistant to high temperatures of 800°C.

3. The method for preparing a water treatment honeycomb filler according to claim 1, wherein: The water treatment honeycomb filler is a stainless steel honeycomb filler coated with a composite active layer of neodymium tungstate and iron tungstate, wherein the mass percentage of neodymium tungstate in the water treatment honeycomb filler is 1.8% to 1.9%, and the mass percentage of iron tungstate in the water treatment honeycomb filler is 1.5% to 1.6%.

4. The method for preparing a water treatment honeycomb filler according to claim 1, wherein: The water treatment honeycomb filler has a sheet thickness of 0.55 to 0.65 mm and a specific surface area of ​​105 to 120 m 2 / m 3 .