Seaweed nano-gray alkali and preparation method and application thereof

Abstract

The application provides a kind of seaweed nano grey alkali and its preparation method and application, the component of the seaweed nano grey alkali includes natural sea limestone, seaweed ash, sodium carboxymethyl cellulose, porous graphene, activating agent, scale remover, plasticizing agent and diatomite.The preparation method includes the following steps: (1) according to the weight fraction, natural sea limestone, seaweed ash, sodium carboxymethyl cellulose, porous graphene, activating agent, scale remover, plasticizing agent and diatomite are mixed, and the premix is obtained after grinding treatment;(2) the premix obtained in step (1) is subjected to high pressure homogenization treatment, and the seaweed nano grey alkali is obtained.The seaweed nano grey alkali provided by the application can efficiently remove pollutants in water, compared with the traditional water treatment method, has lower cost and higher treatment efficiency, and is beneficial to large-scale popularization and application.

Description

Technical Field

[0001] This invention belongs to the field of water treatment technology, and relates to a water treatment agent, particularly to a seaweed nano-ash alkali and its preparation method and application. Background Technology

[0002] Water pollutants are diverse, mainly including organic matter, inorganic matter, heavy metals, microorganisms, and pesticide residues. Each pollutant has different chemical properties and biodegradability, thus posing different requirements for water treatment technologies.

[0003] Traditional water treatment technologies are mainly divided into sedimentation, filtration, adsorption, and oxidation. They generally have limited effectiveness in removing specific pollutants and have significant room for improvement in terms of treatment efficiency, cost, energy consumption, and secondary pollution.

[0004] Seaweed ash is the ash left after burning seaweed. It contains various minerals and trace elements, which give it potential applications in water treatment. For example, seaweed ash is rich in minerals such as calcium and magnesium, which can form precipitates with heavy metal ions in water, such as lead, cadmium, and mercury, thereby removing these pollutants. Seaweed ash is alkaline and can be used to adjust the pH of water, especially in the neutralization of acidic water. Some components in seaweed ash have flocculation properties, helping to aggregate suspended particles in water for removal through sedimentation or filtration. Seaweed ash contains components that inhibit microbial growth, helping to control bacteria and algae in water.

[0005] However, the adsorption and flocculation capabilities of seaweed ash are far inferior to those of specialized water treatment chemicals. Under normal circumstances, it needs to be used in combination with other treatment methods, and the efficiency of seaweed ash in water treatment is highly susceptible to factors such as water conditions, pH value, and temperature. Therefore, how to optimize the performance of seaweed ash and how to effectively apply it in water treatment processes have become urgent problems that need to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a seaweed nano-ash alkali, its preparation method and application. The seaweed nano-ash alkali can efficiently remove pollutants from water bodies. Compared with traditional water treatment methods, it has lower cost and higher treatment efficiency, which is conducive to large-scale promotion and application.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides a seaweed nano-ash alkali, wherein the seaweed nano-ash alkali comprises natural sea limestone, seaweed ash, sodium carboxymethyl cellulose, porous graphene, activator, descaling agent, plasticizer and diatomaceous earth.

[0009] This invention achieves efficient removal of pollutants from water through the synergistic effect of specific components and seaweed ash. Natural sea limestone helps neutralize acidic substances and adjust the pH of the water; sodium carboxymethyl cellulose promotes the aggregation of suspended particles in the water, accelerating the sedimentation process through flocculation and improving water transparency; porous graphene has a high specific surface area, enhancing adsorption capacity; activators fully activate the potential activity of other components, enhancing the overall material efficiency; the descaling agent works synergistically with seaweed ash to further improve the removal of dirt; plasticizers improve the plasticity of the material, making it easier to process and apply; diatomaceous earth, as a porous material, provides additional adsorption surface area, effectively removing suspended particles and organic matter from the water. Compared to traditional water treatment methods, the seaweed nano-ash alkali provided by this invention has lower cost and higher treatment efficiency, which is conducive to large-scale promotion and application.

[0010] Preferably, the seaweed nano-ash alkali comprises the following components in parts by weight:

[0011]

[0012]

[0013] The natural sea limestone comprises 55-69 parts by weight, for example, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, or 69 parts; the seaweed ash comprises 8-12 parts by weight, for example, 8, 8.5, 9, 9.5, 10, 10.5, 11, or 11.5 parts. The sodium carboxymethyl cellulose comprises 12 parts by weight, wherein the sodium carboxymethyl cellulose comprises 3-7 parts by weight, for example, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, or 7 parts; and the porous graphene comprises 12-18 parts by weight, for example, 12 parts, 12.5 parts, 13 parts, 13.5 parts, 14 parts, 14.5 parts, 15 parts, 15.5 parts, 16 parts, 16.5 parts, 17 parts, or 17.5 parts. The activator is 1-3 parts by weight, for example, 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, or 3 parts by weight; the descaling agent is 2-5 parts by weight, for example, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, or 5 parts by weight; and the plasticizer is 1-3 parts by weight, for example, 1 part ... 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, or 3 parts, wherein the weight of the diatomaceous earth is 1-3 parts, for example, it can be 1 part, 1.2 parts, 1.4 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.6 parts, 2.8 parts, or 3 parts, but is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0014] Preferably, the activator comprises any one or a combination of at least two of sodium carbonate, aluminum oxide, potassium nitrate, cobalt dioxide, titanium dioxide, magnesium oxide, or calcium oxide. Typical but non-limiting combinations include combinations of sodium carbonate and aluminum oxide, aluminum oxide and potassium nitrate, potassium nitrate and cobalt dioxide, cobalt dioxide and titanium dioxide, titanium dioxide and magnesium oxide, or magnesium oxide and calcium oxide.

[0015] Preferably, the average particle size of the activator is 10-500 nm, for example, it can be 10 nm, 50 nm, 100 nm, 150 nm, 200 nm, 250 nm, 300 nm, 350 nm, 400 nm, 450 nm or 500 nm, but is not limited to the listed values, other unlisted values ​​within this range are also applicable.

[0016] Preferably, the descaling agent comprises any one or a combination of at least two of sodium dodecylbenzenesulfonate, sodium hydroxide, hydrochloric acid, citric acid, sodium phosphate, or acrylic acid. Typical but non-limiting combinations include the combination of sodium dodecylbenzenesulfonate and sodium hydroxide, the combination of sodium hydroxide and hydrochloric acid, the combination of hydrochloric acid and citric acid, the combination of citric acid and sodium phosphate, or the combination of sodium phosphate and acrylic acid.

[0017] Preferably, the average particle size of the descaling agent is 100-500nm, for example, it can be 100nm, 150nm, 200nm, 250nm, 300nm, 350nm, 400nm, 450nm or 500nm, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0018] Preferably, the plasticizer comprises any one or a combination of at least two of lignin sulfonate, polycarboxylic acid, naphthalene sulfonate, aromatic aminosulfonate, or sulfonated melamine-formaldehyde resin. Typical but non-limiting combinations include combinations of lignin sulfonate and polycarboxylic acid, combinations of polycarboxylic acid and naphthalene sulfonate, combinations of naphthalene sulfonate and aromatic aminosulfonate, or combinations of aromatic aminosulfonate and sulfonated melamine-formaldehyde resin.

[0019] Preferably, the average particle size of the plasticizer is 100-500nm, for example, it can be 100nm, 150nm, 200nm, 250nm, 300nm, 350nm, 400nm, 450nm or 500nm, but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0020] Secondly, the present invention provides a method for preparing seaweed nano-ash alkali as described in the first aspect, the preparation method comprising the following steps:

[0021] (1) Mix natural sea limestone, seaweed ash, sodium carboxymethyl cellulose, porous graphene, activator, descaling agent, plasticizer and diatomaceous earth according to the weight parts, and grind them to obtain a premix;

[0022] (2) The premix obtained in step (1) is subjected to high pressure homogenization to obtain the seaweed nano-ash alkali.

[0023] This invention achieves thorough mixing and nano-sized products through sequential mixing, grinding, and high-pressure homogenization. Nano-sized particles have a larger specific surface area, which helps to improve the material's adsorption capacity and reactivity. At the same time, it significantly improves the uniformity and stability of the material in the aquatic environment, avoids the impact of excessively large particles on the water treatment effect, and ultimately improves the water treatment efficiency.

[0024] Preferably, the grinding process in step (1) is performed until the average particle size of the premix is ​​50-1500 nm, for example, it can be 50 nm, 100 nm, 200 nm, 300 nm, 400 nm, 500 nm, 600 nm, 700 nm, 800 nm, 900 nm, 1000 nm, 1100 nm, 1200 nm, 1300 nm, 1400 nm or 1500 nm, and the saturation magnetization is 10-100 emu / g, for example, it can be 10 emu / g, 20 emu / g, 30 emu / g, 40 emu / g, 50 emu / g, 60 emu / g, 70 emu / g, 80 emu / g, 90 emu / g or 100 emu / g, but it is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0025] Preferably, the mixing temperature of the high-pressure homogenization process in step (2) is 60-70℃, for example, it can be 60℃, 61℃, 62℃, 63℃, 64℃, 65℃, 66℃, 67℃, 68℃, 69℃ or 70℃, the mixing pressure is 19-22MPa, for example, it can be 19MPa, 19.5MPa, 20MPa, 20.5MPa, 21MPa, 21.5MPa or 22MPa, and the processing time is 20-30min, for example, it can be 20min, 21min, 22min, 23min, 24min, 25min, 26min, 27min, 28min, 29min or 30min, but it is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0026] As a preferred embodiment of the second aspect of the present invention, the preparation method includes the following steps:

[0027] (1) Mix 55-69 parts of natural sea limestone, 8-12 parts of seaweed ash, 3-7 parts of sodium carboxymethyl cellulose, 12-18 parts of porous graphene, 1-3 parts of activator, 2-5 parts of detergent, 1-3 parts of plasticizer and 1-3 parts of diatomaceous earth, and grind to obtain a premix with an average particle size of 50-1500nm and a saturation magnetization of 10-100emu / g;

[0028] (2) The premix obtained in step (1) is subjected to high pressure homogenization for 20-30 minutes, and the mixing temperature of the high pressure homogenization is controlled at 60-70℃ and the mixing pressure is 19-22MPa to obtain the seaweed nano-ash alkali.

[0029] Thirdly, the present invention provides an application of seaweed nano-ash alkali as described in the first aspect, wherein the seaweed nano-ash alkali is used to remove pollutants from water.

[0030] The numerical range described in this invention includes not only the point values ​​listed above, but also any point values ​​within the numerical ranges not listed above. Due to space limitations and for the sake of brevity, this invention will not exhaustively list all the specific point values ​​included in the range.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] (1) This invention achieves efficient removal of pollutants from water through the synergistic effect of specific components and seaweed ash. Natural sea limestone helps neutralize acidic substances and regulate the pH of the water; sodium carboxymethyl cellulose promotes the aggregation of suspended particles in the water, accelerating the sedimentation process through flocculation and improving water transparency; porous graphene has a high specific surface area, enhancing adsorption capacity; the activator fully activates the potential activity of other components, enhancing the overall material efficiency; the scale remover works in conjunction with seaweed ash to further improve the removal capacity of dirt; the plasticizer improves the plasticity of the material, making it easier to process and apply; diatomaceous earth, as a porous material, provides additional adsorption surface area, effectively removing suspended particles and organic matter from the water. Compared with traditional water treatment methods, the seaweed nano-ash alkali provided by this invention has lower cost and higher treatment efficiency, which is conducive to large-scale promotion and application.

[0033] (2) The present invention achieves full mixing and nano-sized product by sequentially mixing, grinding and high pressure homogenization. The nano-sized particles have a larger specific surface area, which helps to improve the adsorption capacity and reactivity of the material. At the same time, it fully improves the uniformity and stability of the material in the water environment, avoids the influence of excessively large particles on the water treatment effect, and ultimately improves the water treatment efficiency. Detailed Implementation

[0034] The technical solution of the present invention will be further illustrated below through specific embodiments.

[0035] Example 1

[0036] This embodiment provides a seaweed nano-ash alkali and its preparation method. The seaweed nano-ash alkali comprises the following components by weight:

[0037]

[0038] The porous graphene has a specific surface area of ​​562 m². 2 / g, wherein the average particle size of the sodium carbonate is 200nm, the average particle size of the sodium dodecylbenzenesulfonate is 300nm, and the average particle size of the sodium ligninsulfonate is 300nm.

[0039] The preparation method provided in this embodiment includes the following steps:

[0040] (1) Natural sea limestone, seaweed ash, sodium carboxymethyl cellulose, porous graphene, sodium carbonate, sodium dodecylbenzene sulfonate, sodium lignosulfonate and diatomaceous earth were mixed according to the weight parts, and after grinding, a premix with an average particle size of 1200 nm and a saturation magnetization of 50 emu / g was obtained.

[0041] (2) The premix obtained in step (1) is subjected to high pressure homogenization for 25 minutes, and the mixing temperature of the high pressure homogenization is controlled at 65°C and the mixing pressure is 20MPa to obtain the seaweed nano-ash alkali.

[0042] Example 2

[0043] This embodiment provides a seaweed nano-ash alkali and its preparation method. The seaweed nano-ash alkali comprises the following components by weight:

[0044]

[0045]

[0046] The porous graphene has a specific surface area of ​​651 m². 2 / g, wherein the average particle size of the alumina is 10nm, the average particle size of the sodium hydroxide is 100nm, and the average particle size of the sodium 1-naphthalenesulfonate is 100nm.

[0047] The preparation method provided in this embodiment includes the following steps:

[0048] (1) Natural sea limestone, seaweed ash, sodium carboxymethyl cellulose, porous graphene, alumina, sodium hydroxide, sodium 1-naphthalenesulfonate and diatomaceous earth were mixed according to the weight parts, and after grinding, a premix with an average particle size of 50 nm and a saturation magnetization of 10 emu / g was obtained.

[0049] (2) The premix obtained in step (1) is subjected to high pressure homogenization for 20 minutes, and the mixing temperature of the high pressure homogenization is controlled at 70°C and the mixing pressure is 22MPa to obtain the seaweed nano-ash alkali.

[0050] Example 3

[0051] This embodiment provides a seaweed nano-ash alkali and its preparation method. The seaweed nano-ash alkali comprises the following components by weight:

[0052]

[0053]

[0054] The porous graphene has a specific surface area of ​​483 m². 2 / g, wherein the average particle size of the calcium oxide is 500nm, the average particle size of the sodium phosphate is 500nm, and the average particle size of the aromatic aminosulfonate sodium is 500nm.

[0055] The preparation method provided in this embodiment includes the following steps:

[0056] (1) Natural sea limestone, seaweed ash, sodium carboxymethyl cellulose, porous graphene, calcium oxide, sodium phosphate, sodium aromatic aminosulfonate and diatomaceous earth are mixed according to the weight parts, and after grinding, a premix with an average particle size of 1500nm and a saturation magnetization of 100emu / g is obtained.

[0057] (2) The premix obtained in step (1) is subjected to high pressure homogenization for 30 minutes, and the mixing temperature of the high pressure homogenization is controlled at 60°C and the mixing pressure is 19MPa to obtain the seaweed nano-ash alkali.

[0058] Example 4

[0059] This embodiment provides a seaweed nano-ash alkali and its preparation method. Except for replacing sodium carbonate with an equal mass of potassium nitrate, the other steps and conditions are the same as in Example 1, so they will not be described in detail here.

[0060] Example 5

[0061] This embodiment provides a seaweed nano-ash alkali and its preparation method. Except for replacing sodium lignosulfonate with an equal mass of sulfonated melamine-formaldehyde resin (degree of polymerization of 3500), the other steps and conditions are the same as in Example 1, so they will not be described in detail here.

[0062] Example 6

[0063] This embodiment provides a seaweed nano-ash alkali and its preparation method. Except for adjusting the grinding conditions in step (1) to change the average particle size of the premix to 2000 nm, the other steps and conditions are the same as in Example 1, so they will not be repeated here.

[0064] Example 7

[0065] This embodiment provides a seaweed nano-ash alkali and its preparation method. Except for changing the mixing temperature of the high-pressure homogenization treatment in step (2) to 50°C, the other steps and conditions are the same as in Example 1, so they will not be repeated here.

[0066] Example 8

[0067] This embodiment provides a seaweed nano-ash alkali and its preparation method. Except for changing the mixing pressure of the high-pressure homogenization treatment in step (2) to 15 MPa, the other steps and conditions are the same as in Example 1, so they will not be repeated here.

[0068] Comparative Example 1

[0069] This comparative example provides a seaweed nano-ash alkali and its preparation method. Except for the absence of sodium carboxymethyl cellulose, the other steps and conditions are the same as in Example 1, so they will not be described in detail here.

[0070] Comparative Example 2

[0071] This comparative example provides a seaweed nano-ash alkali and its preparation method. Except for the absence of porous graphene, the other steps and conditions are the same as in Example 1, so they will not be described in detail here.

[0072] Comparative Example 3

[0073] This comparative example provides a seaweed nano-ash alkali and its preparation method. Except for the absence of sodium carbonate, the other steps and conditions are the same as in Example 1, so they will not be described in detail here.

[0074] Comparative Example 4

[0075] This comparative example provides a seaweed nano-ash alkali and its preparation method. Except for the absence of sodium dodecylbenzenesulfonate, the other steps and conditions are the same as in Example 1, so they will not be described in detail here.

[0076] Comparative Example 5

[0077] This comparative example provides a seaweed nano-ash alkali and its preparation method. Except for the absence of sodium lignosulfonate, the other steps and conditions are the same as in Example 1, so they will not be described in detail here.

[0078] Performance testing

[0079] Thirteen wastewater samples (1 L each) were prepared, with the pH controlled at 6, particulate matter concentration at 10 mg / L, and chemical oxygen demand (COD) at 500 mg / L. The seaweed nano-ash alkali obtained in Examples 1-8 and Comparative Examples 1-5 were added to the aforementioned 13 wastewater samples, with an addition amount of 10 g. The mixture was thoroughly stirred to suspend the seaweed nano-ash alkali and ensure full contact with the wastewater. After stirring for 5 hours, the wastewater pH, residual particulate matter concentration, and COD were measured. The relevant physical properties and pollution removal test results of the seaweed nano-ash alkali are shown in Table 1 below.

[0080] Table 1

[0081]

[0082] Therefore, this invention achieves efficient removal of pollutants from water through the synergistic effect of specific components and seaweed ash. Specifically, natural sea limestone helps neutralize acidic substances and adjust the pH value of the water; sodium carboxymethyl cellulose promotes the aggregation of suspended particles in the water, accelerating the sedimentation process through flocculation and improving water transparency; porous graphene has a high specific surface area, enhancing adsorption capacity; the activator fully activates the potential activity of other components, enhancing the overall material efficiency; the scale remover works synergistically with seaweed ash to further improve the removal of dirt; the plasticizer improves the plasticity of the material, making it easier to process and apply; and diatomaceous earth, as a porous material, provides additional adsorption surface area, effectively removing suspended particles and organic matter from the water. Compared to traditional water treatment methods, the seaweed nano-ash alkali provided by this invention has lower cost and higher treatment efficiency, which is conducive to large-scale promotion and application.

[0083] Furthermore, the present invention achieves thorough mixing and nano-sized products through sequential mixing, grinding, and high-pressure homogenization. Nano-sized particles have a larger specific surface area, which helps to improve the adsorption capacity and reactivity of the material. At the same time, it significantly improves the uniformity and stability of the material in the aquatic environment, avoids the impact of excessively large particles on the water treatment effect, and ultimately improves the water treatment efficiency.

[0084] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A type of seaweed nano-ash alkali, characterized in that, The components of the seaweed nano-ash alkali include natural sea limestone, seaweed ash, sodium carboxymethyl cellulose, porous graphene, activator, descaling agent, plasticizer and diatomaceous earth; The activator comprises any one or a combination of at least two of sodium carbonate, aluminum oxide, potassium nitrate, cobalt dioxide, titanium dioxide, magnesium oxide, or calcium oxide; the average particle size of the activator is 10-500 nm. The descaling agent comprises any one or a combination of at least two of sodium dodecylbenzenesulfonate, sodium hydroxide, hydrochloric acid, citric acid, sodium phosphate, or acrylic acid; the average particle size of the descaling agent is 100-500 nm. The plasticizer includes any one or a combination of at least two of lignin sulfonate, polycarboxylic acid, naphthalene sulfonate, aromatic aminosulfonate, or sulfonated melamine-formaldehyde resin; the average particle size of the plasticizer is 100-500 nm.

2. The seaweed nano-ash alkali according to claim 1, characterized in that, The seaweed nano-ash alkali comprises the following components in parts by weight: 55-69 parts of natural sea limestone; 8-12 parts seaweed ash; 3-7 parts sodium carboxymethyl cellulose; 12-18 parts of porous graphene; Activator 1-3 parts; 2-5 parts of descaling agent; Plasticizer 1-3 parts; 1-3 parts diatomaceous earth.

3. A method for preparing seaweed nano-ash alkali as described in claim 1 or 2, characterized in that, The preparation method includes the following steps: (1) Mix natural sea limestone, seaweed ash, sodium carboxymethyl cellulose, porous graphene, activator, descaling agent, plasticizer and diatomaceous earth according to the weight parts, and grind them to obtain a premix; (2) The premix obtained in step (1) is subjected to high pressure homogenization to obtain the seaweed nano-ash alkali.

4. The preparation method according to claim 3, characterized in that, The grinding process in step (1) is carried out until the average particle size of the premix is ​​50-1500 nm and the saturation magnetization is 10-100 emu / g.

5. The preparation method according to claim 3, characterized in that, The mixing temperature of the high-pressure homogenization process in step (2) is 60-70℃, the mixing pressure is 19-22MPa, and the processing time is 20-30min.

6. The preparation method according to claim 3, characterized in that, The preparation method includes the following steps: (1) Mix 55-69 parts of natural sea limestone, 8-12 parts of seaweed ash, 3-7 parts of sodium carboxymethyl cellulose, 12-18 parts of porous graphene, 1-3 parts of activator, 2-5 parts of descaling agent, 1-3 parts of plasticizer and 1-3 parts of diatomaceous earth, and grind them to obtain a premix with an average particle size of 50-1500 nm and a saturation magnetization of 10-100 emu / g; (2) The premix obtained in step (1) is subjected to high pressure homogenization for 20-30 minutes, and the mixing temperature of the high pressure homogenization is controlled at 60-70℃ and the mixing pressure is 19-22MPa to obtain the seaweed nano-ash alkali.

7. An application of the seaweed nano-ash alkali as described in claim 1 or 2, characterized in that, The seaweed nano-ash alkali is used to remove pollutants from water.

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