Composite environment-friendly dust suppressant for industrial solid waste landfill and preparation method of composite environment-friendly dust suppressant
By constructing a mathematical model using response surface methodology and orthogonal experimental design, precise ratio optimization of wetting agent, water-retaining agent, and binder was achieved. The performance of the wetting agent was verified through surface tension, permeability, and water retention rate experiments, as well as through freeze-thaw resistance experiments. This improved the technical threshold of dust suppressants, solved the problem of the lack of scientific optimization methods in the composition determination process in existing technologies, and achieved performance stability and consistent dust suppression effect under different environmental conditions.
Patent Information
- Application Number
- CN202511345753.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2026-03-17
AI Technical Summary
Existing composite environmentally friendly dust suppressants lack scientific optimization methods in the process of determining their components, resulting in insufficient performance stability. They are difficult to maintain a balance of wettability, adhesion and water retention under various environmental conditions, which affects the consistency of dust suppression effect.
Response surface methodology and orthogonal experimental design were used to construct a multi-factor mathematical model. Wetting agents, water-retaining agents and binders were precisely proportioned. The performance was verified through surface tension, permeability, water retention rate and wind erosion resistance experiments. Tea polyphenols and silicon-based wind erosion resistant agents were added to improve antioxidant and wind erosion resistance.
It achieves consistent performance stability and dust suppression effect under different environmental conditions, expands the application range of dust suppressants, and ensures effective dust suppression capability in complex environments.
Smart Images
Figure CN121674031A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of environmental protection materials technology, and in particular to a composite environmentally friendly dust suppressant for industrial solid waste landfills and its preparation method. Background Technology
[0002] The composite environmentally friendly dust suppressant for industrial solid waste landfills is a polymer material formulation specifically developed to control dust generated during the storage and landfilling of industrial solid waste. It is typically composed of natural biodegradable polymers, environmentally friendly adhesives, and moisturizing factors. By spraying, it forms a flexible film or crust layer that effectively covers the surface of solid waste, resists wind and rain erosion, prevents particulate matter from scattering, reduces the dust diffusion of heavy metals and harmful substances, and avoids secondary pollution. It is a key environmentally friendly material for dust control in modern landfills.
[0003] Existing composite environmentally friendly dust suppressants generally lack scientific optimization methods in the process of determining their components. Traditional methods are mostly based on empirical formulations or a limited number of experimental adjustments, lacking systematic analysis of the interaction of multiple factors. This results in insufficient performance stability of the dust suppressant and difficulty in achieving optimal performance under various environmental conditions. Key indicators such as wettability, adhesion, and water retention are difficult to maintain equilibrium under different environmental parameters, and the synergistic effect of each component has not been fully explored, ultimately affecting the consistency of dust suppression effect.
[0004] To address the common problem of a lack of scientific optimization methods in the determination of components in existing composite environmentally friendly dust suppressants, traditional methods are mostly based on empirical formulations or limited experimental adjustments, lacking systematic analysis of the interactions of multiple factors. This results in insufficient performance stability of the dust suppressant and difficulty in achieving optimal performance under various environmental conditions. Key indicators such as wetting properties, adhesion, and water retention are difficult to maintain equilibrium under different environmental parameters, and the synergistic effects of each component are not fully explored, ultimately affecting the consistency of dust suppression effects. This solution introduces response surface methodology and orthogonal experimental design to construct a multi-factor mathematical model, achieving optimal performance of wetting agents, adhesion, and water retention under different environmental conditions. The precise and optimized formulation of components such as water-based agents and binders not only breaks through the limitations of traditional empirical formulations, but also verifies the significant impact of each factor on performance indicators through statistical methods, ensuring the scientific nature and repeatability of the formulation design. In terms of wettability, the surface tension and contact angle experiments verify superior dust wetting efficiency; in terms of adhesion, the film-forming performance and wind erosion resistance tests achieve durable stability of the solidified layer; and in terms of water retention, the water retention rate and freeze-thaw resistance experiments ensure long-lasting moisturizing ability. This fundamentally raises the technical threshold of dust suppressants and provides reliable technical support for dust suppression needs in complex environments. Summary of the Invention
[0005] To overcome the problem that existing composite environmentally friendly dust suppressants generally lack scientific optimization methods in the process of determining their components, traditional methods are mostly based on empirical formulations or a limited number of experimental adjustments, lacking systematic analysis of the interaction of multiple factors. This results in insufficient stability of dust suppressant performance and difficulty in achieving optimal performance under various environmental conditions. Key indicators such as wettability, adhesion, and water retention are difficult to maintain equilibrium under different environmental parameters, and the synergistic effect of each component is not fully explored, ultimately affecting the consistency of dust suppression effect.
[0006] The technical solution of the present invention is: a composite environmentally friendly dust suppressant for industrial solid waste landfills, wherein, based on the total mass of the dust suppressant, the dust suppressant comprises the following components in the following mass percentages: sodium dodecylbenzenesulfonate 0.4%-0.6%, rhamnose lipolipide 0.1%-0.3%, glycerin 0.3%-0.5%, sodium alginate 0.2%-0.4%, carboxymethyl cellulose 0.2%-0.4%, sulfonated lignin graft copolymer 0.1%-0.3%, silicon-based anti-erosion agent 0.1%-0.2%, propylene glycol 0.1%-0.2%, and tea polyphenol extract 0.04%-0.06%, with the balance being water.
[0007] Preferably, the concentration of sodium alginate is 1%-3%, the pH value of the composite environmentally friendly dust suppressant is 6-7, it is free of heavy metals, and its degradation products are CO2 and H2O.
[0008] A method for preparing a composite environmentally friendly dust suppressant for industrial solid waste landfills includes the following steps:
[0009] S11: Determine the distribution ratio of each component group through dust sampling, sieving and drying, accurate weighing and compatibility verification;
[0010] S12: Wetting agents or water-retaining agents are screened using single-factor experiments. The temperature is controlled at 25±2℃, the stirring is at 300rpm, and the pH is adjusted to 6-7 to form a stable composite system.
[0011] S13: The performance of the dust suppressant was fully verified through tests of surface tension, permeability, water retention, contact angle, wind erosion resistance, biodegradability, and freeze-thaw resistance.
[0012] S14: Use Design-Expert software to perform three-factor, three-level response surface analysis to detect the optimal ratio and verify the reliability of the model;
[0013] S15: Through long-term stability, aging tests and biocompatibility tests, compared with commercially available products, the amount of rhamnolipin or tea polyphenols added was optimized.
[0014] S16: The process was optimized by introducing response surface methodology, adding tea polyphenols to enhance antioxidant properties, and optimizing the sodium alginate concentration to 1%-3% to improve overall performance;
[0015] S17: GC-MS analysis shows that the degradation products are CO2 or H2O. Toxicity testing and LCA life cycle assessment are conducted to establish an environmental monitoring system.
[0016] Preferably, the raw material pretreatment and proportioning calculation include the following steps:
[0017] S21: Dust sampling was conducted in five representative areas of the Jinjie landfill. Surface dust samples were collected using manual sampling tubes to test whether the samples were representative of the area.
[0018] S22: Use an 80-mesh standard sieve to sieve the dust sample to remove impurities and ensure uniform particle size to meet the requirements of subsequent experiments;
[0019] S23: Dry the treated dust in an 80℃ forced-air drying oven to constant weight, and store it in a silica gel desiccator to prevent moisture absorption from affecting the experimental results;
[0020] S24: Accurately weigh each component raw material, including sodium dodecylbenzenesulfonate 0.4%-0.6%, rhamnolipin 0.1%-0.3%, glycerin 0.3%-0.5%, sodium alginate 0.2%-0.4%, carboxymethyl cellulose 0.2%-0.4%, sulfonated lignin graft copolymer 0.1%-0.3%, silicone-based anti-corrosion agent 0.1%-0.2%, propylene glycol 0.1%-0.2%, tea polyphenol extract 0.04%-0.06%, and water 97.85%, with an error controlled within ±0.001g;
[0021] S25: The purity of the raw materials is tested, and atomic absorption spectrometry is used to verify that there are no heavy metal residues.
[0022] S26: Verify the compatibility between raw materials, observe whether precipitation or stratification occurs through premixing tests, and test the mixing stability;
[0023] S27: The distribution ratio of each group was calculated based on the orthogonal experimental design, and the sodium dodecylbenzenesulfonate content was found to be in the range of 0.4%-0.6%, which meets the requirements for formula optimization.
[0024] Preferably, the following steps are included when optimizing the mixing process:
[0025] S31: Wetting agents were screened using single-factor experiments. The surface tension properties of sodium dodecylbenzene sulfonate and sodium lignosulfonate were compared to determine the optimal type of wetting agent.
[0026] S32: The optimal concentration range of glycerin was determined to be 0.3%-0.5% through water retention testing;
[0027] S33: The viscosity of the mixed solution was measured using an NDJ-5S digital rotational viscometer, and the amount of carboxymethyl cellulose was adjusted to 0.2%-0.4% to optimize film-forming properties;
[0028] S34: During the mixing process, the temperature is controlled at 25±2℃, the stirring speed is 300rpm, and the components are checked to ensure that they are fully dissolved and there is no local overheating.
[0029] S35: Add a silicon-based anti-erosion agent and stir continuously for 30 minutes to form a uniform and stable composite system, thereby improving the dust suppressant's anti-erosion ability.
[0030] S36: Observe the microstructure of the mixed solution using SEM (scanning electron microscope) to detect whether there is particle aggregation and verify the mixing uniformity.
[0031] S37: Adjust the pH value to the range of 6-7, and use a precision pH meter for real-time monitoring and calibration to check whether the dust suppressant is neutral and non-corrosive.
[0032] Preferably, the performance testing and verification process includes the following steps:
[0033] S41: Use a Dataphysics-OCA20 surface tension meter to measure the surface tension values of surfactants with different concentrations to evaluate the wetting performance.
[0034] S42: Conduct permeability tests according to GB / T16913-2008 standard, record the permeation time and depth of the solution in the dust sample, and verify the permeation efficiency;
[0035] S43: The water absorption and moisture retention performance of the dust suppressant is determined by the water retention rate test, the water retention rate within 60 minutes is calculated, and the water retention capacity is evaluated.
[0036] S44: Conduct contact angle tests and use a JY-82B Kruss DSA contact angle meter to evaluate wetting performance and verify the affinity between the dust suppressant and the dust.
[0037] S45: Simulate natural wind conditions through wind erosion resistance experiments, calculate the percentage of dust loss by mass, and evaluate the wind erosion resistance effect of dust suppressants.
[0038] S46: Conduct biodegradability tests, bury the solidified layer in the soil, and periodically test the composition of degradation products to verify its environmental performance;
[0039] S47: Perform freeze-thaw resistance tests to verify the stability of the dust suppressant through freeze-thaw cycles and test whether it maintains stable performance under extreme climatic conditions.
[0040] As a preferred approach, the orthogonal experimental design includes the following steps:
[0041] S51: Design a three-factor, three-level orthogonal experiment to determine the optimal combination of wetting agent, water-retaining agent, and binder, and optimize the performance of dust suppressant;
[0042] S52: Use Design-Expert11 software to perform response surface analysis, establish mathematical models of various factors and performance indicators, and predict optimal parameters;
[0043] S53: Determine the significance of each factor's influence on the performance of the dust suppressant through analysis of variance, identify key influencing factors, and optimize the formulation.
[0044] S54: Perform residual analysis to verify the reliability of the model, check whether the error between the predicted value and the actual value is less than 5%, and ensure the accuracy of the model;
[0045] S55: Visualize the impact of the interaction of various factors on water retention rate and viscosity through response surface 3D plots, and intuitively show the direction of optimization;
[0046] S56: Determine the optimal combination of process parameters to maximize performance by using sodium dodecylbenzenesulfonate at 0.54% and glycerol at 0.45%.
[0047] S57: Conduct five parallel experiments to verify the repeatability and stability of the optimal ratio, and test the experimental results to ensure they are reliable and reproducible.
[0048] As a preferred method, the experimental verification and optimization process includes the following steps:
[0049] S61: Prepare dust suppressant samples under optimal mixing conditions, verify water retention rate, viscosity and pH value, and test whether they meet the design requirements;
[0050] S62: Compare performance with commercially available dust suppressants, evaluate advantages through wettability and wind erosion resistance, and verify the innovative effect;
[0051] S63: Conduct long-term stability tests by storing the product in a 40°C constant temperature chamber for 30 days and observing whether stratification or precipitation occurs to assess storage stability.
[0052] S64: Accelerated aging tests simulate natural environmental conditions to verify the weather resistance of dust suppressants and test the stability of their long-term use effect;
[0053] S65: Conduct biocompatibility testing to determine whether the degradation products are CO2 and H2O, with no toxic substances released, and meet environmental protection standards;
[0054] S66: The addition amounts of rhamnolipin and tea polyphenol extract were optimized through orthogonal experiments to improve antioxidant performance and extend the shelf life of dust suppressant;
[0055] S67: Verify the synergistic effect of silicon-based anti-erosion agent and propylene glycol to improve the wind erosion resistance and weather resistance of dust suppressant and enhance its overall performance.
[0056] Preferably, the implementation of a creative improvement plan includes the following steps:
[0057] S71: Introducing response surface methodology to optimize the preparation process and improve the overall performance of dust suppressants;
[0058] S72: By adding tea polyphenol extract, the antioxidant and antibacterial properties of the dust suppressant are enhanced, thereby improving its environmental performance and biocompatibility.
[0059] S73: Sulfonated lignin graft copolymer is used to improve bonding strength and film-forming properties, thereby enhancing the film-forming properties and durability of the dust suppressant;
[0060] S74: Optimize the sodium alginate concentration to the range of 1%-3% to enhance film-forming properties and water retention, and improve the moisturizing and binding effects of the dust suppressant;
[0061] S75: The addition of propylene glycol improves the flowability and spray uniformity of the dust suppressant, and the dust suppressant is tested to be able to uniformly cover the dust surface.
[0062] S76: Introducing silicon-based anti-erosion agents to improve the wind erosion resistance and weather resistance of dust suppressants, and enhance the stability of dust suppressants in harsh environments;
[0063] S77: Environmental performance is ensured through degradation product verification, meeting the requirements of being free of heavy metals and biodegradable.
[0064] Preferably, the following steps are included when conducting degradation product verification and environmental assessment:
[0065] S81: Bury the dust solidification layer after spraying dust suppressant in the soil, and regularly test the composition of degradation products to verify that the degradation process meets environmental protection requirements.
[0066] S82: GC-MS analysis of degradation products confirmed that the main products were CO2 and H2O, with no toxic substances released, ensuring environmental safety.
[0067] S83: Conduct biodegradation experiments to verify the degradation rate of the dust suppressant in the natural environment and assess its environmental friendliness;
[0068] S84: Toxicity testing ensures that degradation products are harmless to soil microorganisms, protecting the ecological environment and biodiversity;
[0069] S85: Conduct environmental performance assessments to ensure that the production and use of dust suppressants comply with environmental standards and achieve full life-cycle environmental management.
[0070] S86: Verify the environmental benefits of dust suppressants through LCA life cycle assessment, and comprehensively evaluate their environmental impact and sustainability;
[0071] S87: Establish a monitoring system for degradation products to ensure long-term stable environmental performance.
[0072] The beneficial effects of this invention are:
[0073] 1. Existing composite environmentally friendly dust suppressants generally lack scientific optimization methods in the process of component determination. Traditional methods are mostly based on empirical formulations or a limited number of experimental adjustments, lacking systematic analysis of the interaction of multiple factors. This results in insufficient performance stability of the dust suppressant and difficulty in achieving optimal performance under various environmental conditions. Key indicators such as wettability, adhesion, and water retention are difficult to maintain equilibrium under different environmental parameters, and the synergistic effect of each component is not fully explored, ultimately affecting the consistency of dust suppression effect. This solution introduces response surface methodology and orthogonal experimental design to construct a multi-factor mathematical model, realizing the optimization of wetting agents and water-retaining agents. The precise and optimized formulation of components such as binders not only breaks through the limitations of traditional empirical formulations, but also verifies the significant impact of each factor on performance indicators through statistical methods, ensuring the scientific nature and repeatability of the formulation design. In terms of wettability, the surface tension and contact angle experiments verified superior dust wetting efficiency; in terms of adhesion, the film-forming performance and wind erosion resistance tests achieved the long-lasting stability of the solidified layer; in terms of water retention, the water retention rate and freeze-thaw resistance experiments ensured long-lasting moisturizing ability, fundamentally raising the technical threshold of dust suppressants and providing reliable technical support for dust suppression needs in complex environments.
[0074] 2. Existing composite environmentally friendly dust suppressants have significant shortcomings in terms of environmental adaptability, mainly manifested in insufficient responsiveness to changes in environmental parameters such as temperature, humidity, and wind speed. Traditional dust suppressants are mostly designed for specific environmental conditions, lacking a systematic consideration of adaptability to multiple scenarios. This leads to problems such as easy freezing and failure in cold regions, easy evaporation and water loss in dry regions, and easy peeling and failure in areas with strong wind erosion. This solution significantly improves the environmental adaptability of dust suppressants through a dual approach of material innovation and formula optimization. In terms of material selection, natural high-molecular polymers and bio-based components are used to replace traditional chemical reagents, ensuring that the material is effective across a wide temperature and humidity range. The stability of the solidified layer is enhanced. At the formulation design level, the synergistic ratio of wetting agent and water-retaining agent is adjusted to achieve a balance between wetting speed and moisturizing time. At the same time, the addition of silicone-based anti-wind erosion agent and propylene glycol enhances the wind erosion resistance and weather resistance of the solidified layer. In cold regions, the antifreeze component effectively inhibits the performance degradation caused by freezing. In dry regions, the water-retaining component ensures long-term moisturizing ability. In areas with strong wind erosion, the anti-wind erosion component maintains the integrity of the solidified layer. This not only expands the application range of dust suppressants, but also verifies its eco-friendliness through a full life cycle environmental assessment, providing a sustainable solution for the dust-free management of industrial solid waste landfills. Attached Figure Description
[0075] Figure 1 The diagram shown is a schematic flowchart of a method for preparing a composite environmentally friendly dust suppressant for industrial solid waste landfills according to the present invention.
[0076] Figure 2 The diagram shown is a schematic of the optimized mixing process for a method of preparing a composite environmentally friendly dust suppressant for industrial solid waste landfills according to the present invention.
[0077] Figure 3 The diagram shows a performance testing and verification process for a method of preparing a composite environmentally friendly dust suppressant for industrial solid waste landfills according to the present invention. Detailed Implementation
[0078] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0079] Please see Figure 1-3 This invention provides an embodiment of a composite environmentally friendly dust suppressant for industrial solid waste landfills. Based on the total mass of the dust suppressant, the dust suppressant comprises the following components in the following mass percentages: sodium dodecylbenzenesulfonate 0.5%, rhamnolipin 0.2%, glycerin 0.4%, sodium alginate 0.3%, carboxymethyl cellulose 0.3%, sulfonated lignin graft copolymer 0.2%, silicon-based anti-erosion agent 0.1%, propylene glycol 0.1%, and tea polyphenol extract 0.05%, with the balance being water.
[0080] Preferably, the concentration of sodium alginate is 1%-3%, the pH value of the composite environmentally friendly dust suppressant is 6-7, it is free of heavy metals, and its degradation products are CO2 and H2O.
[0081] A method for preparing a composite environmentally friendly dust suppressant for industrial solid waste landfills includes the following steps:
[0082] S11: Determine the distribution ratio of each component group through dust sampling, sieving and drying, accurate weighing and compatibility verification;
[0083] S12: Wetting agents or water-retaining agents are screened using single-factor experiments. The temperature is controlled at 25±2℃, the stirring is at 300rpm, and the pH is adjusted to 6-7 to form a stable composite system.
[0084] S13: The performance of the dust suppressant was fully verified through tests of surface tension, permeability, water retention, contact angle, wind erosion resistance, biodegradability, and freeze-thaw resistance.
[0085] S14: Use Design-Expert software to perform three-factor, three-level response surface analysis to detect the optimal ratio and verify the reliability of the model;
[0086] S15: Through long-term stability, aging tests and biocompatibility tests, compared with commercially available products, the amount of rhamnolipin or tea polyphenols added was optimized.
[0087] S16: The process was optimized by introducing response surface methodology, adding tea polyphenols to enhance antioxidant properties, and optimizing the sodium alginate concentration to 1%-3% to improve overall performance;
[0088] S17: GC-MS analysis shows that the degradation products are CO2 or H2O. Toxicity testing and LCA life cycle assessment are conducted to establish an environmental monitoring system.
[0089] Preferably, the raw material pretreatment and proportioning calculation include the following steps:
[0090] S21: Dust sampling was conducted in five representative areas of the Jinjie landfill. Surface dust samples were collected using manual sampling tubes to test whether the samples were representative of the area.
[0091] S22: Use an 80-mesh standard sieve to sieve the dust sample to remove impurities and ensure uniform particle size to meet the requirements of subsequent experiments;
[0092] S23: Dry the treated dust in an 80℃ forced-air drying oven to constant weight, and store it in a silica gel desiccator to prevent moisture absorption from affecting the experimental results;
[0093] S24: Accurately weigh each component raw material, including 0.5% sodium dodecylbenzenesulfonate, 0.2% rhamnolipin, 0.4% glycerol, 0.3% sodium alginate, 0.3% carboxymethyl cellulose, 0.2% sulfonated lignin graft copolymer, 0.1% silicone-based anti-corrosion agent, 0.1% propylene glycol, and 0.05% tea polyphenol extract, with the balance being water, and the error controlled within ±0.001g;
[0094] S25: The purity of the raw materials is tested, and atomic absorption spectrometry is used to verify that there are no heavy metal residues.
[0095] S26: Verify the compatibility between raw materials, observe whether precipitation or stratification occurs through premixing tests, and test the mixing stability;
[0096] S27: The distribution ratio of each group was calculated based on the orthogonal experimental design, and the sodium dodecylbenzenesulfonate content was found to be in the range of 0.4%-0.6%, which meets the requirements for formula optimization.
[0097] Preferably, the following steps are included when optimizing the mixing process:
[0098] S31: Wetting agents were screened using single-factor experiments. The surface tension properties of sodium dodecylbenzene sulfonate and sodium lignosulfonate were compared to determine the optimal type of wetting agent.
[0099] S32: The optimal concentration range of glycerin was determined to be 0.4% through water retention testing;
[0100] S33: The viscosity of the mixed solution was measured using an NDJ-5S digital rotational viscometer, and the amount of carboxymethyl cellulose was adjusted to 0.3% to optimize film-forming properties;
[0101] S34: During the mixing process, the temperature is controlled at 25±2℃, the stirring speed is 300rpm, and the components are checked to ensure that they are fully dissolved and there is no local overheating.
[0102] S35: Add a silicon-based anti-erosion agent and stir continuously for 30 minutes to form a uniform and stable composite system, thereby improving the dust suppressant's anti-erosion ability.
[0103] S36: Observe the microstructure of the mixed solution using SEM (scanning electron microscope) to detect whether there is particle aggregation and verify the mixing uniformity.
[0104] S37: Adjust the pH value to the range of 6-7, and use a precision pH meter for real-time monitoring and calibration to check whether the dust suppressant is neutral and non-corrosive.
[0105] Preferably, the performance testing and verification process includes the following steps:
[0106] S41: Use a Dataphysics-OCA20 surface tension meter to measure the surface tension values of surfactants with different concentrations to evaluate the wetting performance.
[0107] S42: Conduct permeability tests according to GB / T16913-2008 standard, record the permeation time and depth of the solution in the dust sample, and verify the permeation efficiency;
[0108] S43: The water absorption and moisture retention performance of the dust suppressant is determined by the water retention rate test, the water retention rate within 60 minutes is calculated, and the water retention capacity is evaluated.
[0109] S44: Conduct contact angle tests and use a JY-82B Kruss DSA contact angle meter to evaluate wetting performance and verify the affinity between the dust suppressant and the dust.
[0110] S45: Simulate natural wind conditions through wind erosion resistance experiments, calculate the percentage of dust loss by mass, and evaluate the wind erosion resistance effect of dust suppressants.
[0111] S46: Conduct biodegradability tests, bury the solidified layer in the soil, and periodically test the composition of degradation products to verify its environmental performance;
[0112] S47: Perform freeze-thaw resistance tests to verify the stability of the dust suppressant through freeze-thaw cycles and test whether it maintains stable performance under extreme climatic conditions.
[0113] As a preferred approach, the orthogonal experimental design includes the following steps:
[0114] S51: Design a three-factor, three-level orthogonal experiment to determine the optimal combination of wetting agent, water-retaining agent, and binder, and optimize the performance of dust suppressant;
[0115] S52: Use Design-Expert11 software to perform response surface analysis, establish mathematical models of various factors and performance indicators, and predict optimal parameters;
[0116] S53: Determine the significance of each factor's influence on the performance of the dust suppressant through analysis of variance, identify key influencing factors, and optimize the formulation.
[0117] S54: Perform residual analysis to verify the reliability of the model, check whether the error between the predicted value and the actual value is less than 5%, and ensure the accuracy of the model;
[0118] S55: Visualize the impact of the interaction of various factors on water retention rate and viscosity through response surface 3D plots, and intuitively show the direction of optimization;
[0119] S56: Determine the optimal combination of process parameters to maximize performance by using sodium dodecylbenzenesulfonate at 0.54% and glycerol at 0.45%.
[0120] S57: Conduct five parallel experiments to verify the repeatability and stability of the optimal ratio, and test the experimental results to ensure they are reliable and reproducible.
[0121] As a preferred method, the experimental verification and optimization process includes the following steps:
[0122] S61: Prepare dust suppressant samples under optimal mixing conditions, verify water retention rate, viscosity and pH value, and test whether they meet the design requirements;
[0123] S62: Compare performance with commercially available dust suppressants, evaluate advantages through wettability and wind erosion resistance, and verify the innovative effect;
[0124] S63: Conduct long-term stability tests by storing the product in a 40°C constant temperature chamber for 30 days and observing whether stratification or precipitation occurs to assess storage stability.
[0125] S64: Accelerated aging tests simulate natural environmental conditions to verify the weather resistance of dust suppressants and test the stability of their long-term use effect;
[0126] S65: Conduct biocompatibility testing to determine whether the degradation products are CO2 and H2O, with no toxic substances released, and meet environmental protection standards;
[0127] S66: The addition amounts of rhamnolipin and tea polyphenol extract were optimized through orthogonal experiments to improve antioxidant performance and extend the shelf life of dust suppressant;
[0128] S67: Verify the synergistic effect of silicon-based anti-erosion agent and propylene glycol to improve the wind erosion resistance and weather resistance of dust suppressant and enhance its overall performance.
[0129] Preferably, the implementation of a creative improvement plan includes the following steps:
[0130] S71: Introducing response surface methodology to optimize the preparation process and improve the overall performance of dust suppressants;
[0131] S72: By adding tea polyphenol extract, the antioxidant and antibacterial properties of the dust suppressant are enhanced, thereby improving its environmental performance and biocompatibility.
[0132] S73: Sulfonated lignin graft copolymer is used to improve bonding strength and film-forming properties, thereby enhancing the film-forming properties and durability of the dust suppressant;
[0133] S74: Optimize the sodium alginate concentration to the range of 1%-3% to enhance film-forming properties and water retention, and improve the moisturizing and binding effects of the dust suppressant;
[0134] S75: The addition of propylene glycol improves the flowability and spray uniformity of the dust suppressant, and the dust suppressant is tested to be able to uniformly cover the dust surface.
[0135] S76: Introducing silicon-based anti-erosion agents to improve the wind erosion resistance and weather resistance of dust suppressants, and enhance the stability of dust suppressants in harsh environments;
[0136] S77: Environmental performance is ensured through degradation product verification, meeting the requirements of being free of heavy metals and biodegradable.
[0137] Preferably, the following steps are included when conducting degradation product verification and environmental assessment:
[0138] S81: Bury the dust solidification layer after spraying dust suppressant in the soil, and regularly test the composition of degradation products to verify that the degradation process meets environmental protection requirements.
[0139] S82: GC-MS analysis of degradation products confirmed that the main products were CO2 and H2O, with no toxic substances released, ensuring environmental safety.
[0140] S83: Conduct biodegradation experiments to verify the degradation rate of the dust suppressant in the natural environment and assess its environmental friendliness;
[0141] S84: Toxicity testing ensures that degradation products are harmless to soil microorganisms, protecting the ecological environment and biodiversity;
[0142] S85: Conduct environmental performance assessments to ensure that the production and use of dust suppressants comply with environmental standards and achieve full life-cycle environmental management.
[0143] S86: Verify the environmental benefits of dust suppressants through LCA life cycle assessment, and comprehensively evaluate their environmental impact and sustainability;
[0144] S87: Establish a monitoring system for degradation products to ensure long-term stable environmental performance.
[0145] Example 1
[0146] Background: In the field of dust pollution control in industrial solid waste landfills, traditional dust suppressants have shortcomings such as insufficient wetting properties, poor wind erosion resistance, unsatisfactory biodegradability, and insufficient freeze-thaw resistance. Existing technologies are difficult to meet the dual requirements of environmental protection and efficiency. This solution optimizes the formulation through orthogonal experiments and scientifically verifies it using response surface methodology, developing a composite dust suppressant that combines high-efficiency dust suppression with environmental protection characteristics, meeting the requirements for dust-free management of industrial solid waste landfills.
[0147] Implementation steps:
[0148] S91: Dust samples were collected from five representative areas of the Jinjie landfill. After being sieved through an 80-mesh sieve, the samples were dried at 80°C to constant weight and stored in a silica gel desiccator.
[0149] S92: Accurately weigh each component: sodium dodecylbenzenesulfonate 0.54%, glycerol 0.45%, carboxymethyl cellulose 0.36%, etc., with the error controlled within ±0.001g, and verify the absence of heavy metal residue by atomic absorption spectrometry;
[0150] S93: Verify raw material compatibility through premixing tests to ensure no sedimentation or stratification occurs;
[0151] S94: Single-factor experiments were used to screen wetting agents, and sodium dodecylbenzenesulfonate was determined to be the optimal choice. The temperature was controlled at 25±2℃, the stirring was 300rpm, and the pH was adjusted to 6-7.
[0152] S95: Add silicon-based anti-corrosion agent and stir continuously for 30 minutes. Observe the microstructure using SEM scanning electron microscope to ensure that there is no particle agglomeration.
[0153] S96: The wettability, water retention rate, and wind erosion resistance were verified by using equipment such as surface tension meter and permeability tester. It was confirmed that the water retention rate reached 0.55% after 1 hour at 60℃ and the wind erosion resistance was as low as 0.05%.
[0154] S97: After undergoing freeze-thaw resistance testing, the hardness of the cured layer still reaches 33.5ha after 6 freeze-thaw cycles, meeting the requirements for use under extreme climatic conditions;
[0155] S98: Using Design-Expert software, a three-factor, three-level response surface analysis was conducted to establish mathematical models for water retention rate, viscosity, and each component. Residual analysis showed that the error between the predicted and actual values was less than 5%.
[0156] S99: By visualizing the interactions of various factors using response surface methodology (RSM) 3D plots, the optimal ratio of sodium dodecylbenzenesulfonate (0.54%) to glycerol (0.45%) was determined.
[0157] Data comparison table:
[0158]
[0160] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A composite environment-friendly dust suppressant for industrial solid waste landfill sites, characterized in that: The dust suppressant comprises the following components in the following mass percentages based on the total mass of the dust suppressant: sodium dodecyl benzene sulfonate 0.4%-0.6%, rhamnolipid 0.1%-0.3%, glycerol 0.3%-0.5%, sodium alginate 0.2%-0.4%, carboxymethyl cellulose 0.2%-0.4%, sulfonated lignin graft copolymer 0.1%-0.3%, silicon-based anti-wind erosion agent 0.1%-0.2%, propylene glycol 0.1%-0.2%, and tea polyphenol extract 0.04%-0.06%, with the balance being water. 2. The environment-friendly dust suppressant for industrial solid waste landfill site as claimed in claim 1, wherein: The concentration of the sodium alginate is 1%-3%, the pH value of the composite environmentally-friendly dust suppressant is 6-7, there is no heavy metal, and the degradation products are CO2 and H2O.
3. The composite environment-friendly dust suppressant for industrial solid waste landfill sites according to any one of claims 1-2, characterized in that: A preparation method of a composite environmentally-friendly dust suppressant for industrial solid waste landfill sites, comprising the following steps: S11: determining the allocation ratio of each component by dust sampling, sieving and drying, accurate weighing and compatibility verification; S12: screening the wetting agent or water-retaining agent by single-factor test, controlling the temperature to be 25±2℃, stirring at 300rpm, adjusting the pH value to 6-7, and forming a stable composite system; S13: comprehensively verifying the performance of the dust suppressant by surface tension, permeability, water retention rate, contact angle, wind erosion resistance, degradability and freeze-thaw resistance experiments; S14: detecting the optimal ratio and verifying the reliability of the model by using Design-Expert software for three-factor three-level response surface analysis; S15: comparing the commercially available products by long-term stability, aging test and biocompatibility test, and optimizing the addition amount of rhamnolipid or tea polyphenol; S16: introducing the response surface method to optimize the process, adding tea polyphenol to enhance the antioxidant property, optimizing the concentration of sodium alginate to 1%-3%, and improving the comprehensive performance; S17: analyzing the degradation products by GC-MS to be CO2 or H2O, performing toxicity test and LCA life cycle assessment, and establishing an environmental monitoring system.
4. The preparation method of claim 3, wherein the preparation method of the composite environmental protection dust suppressant for industrial solid waste landfill is characterized in that: When the raw materials are pretreated and the allocation ratio is calculated, the following steps are included: S21: collecting surface dust samples by using a manual sampling tube in five representative areas of the landfill site, and detecting whether the samples are representative of the areas; S22: sieving the dust samples by using an 80-mesh standard sieve, removing impurities and ensuring the uniformity of the particle size, and meeting the requirements of subsequent experiments; S23: drying the treated dust in a 80℃ air-drying oven to constant weight, and storing in a silica gel dryer to prevent moisture absorption from affecting the experimental results; S24: accurately weighing each component, including sodium dodecyl benzene sulfonate 0.4%-0.6%, rhamnolipid 0.1%-0.3%, glycerol 0.3%-0.5%, sodium alginate 0.2%-0.4%, carboxymethyl cellulose 0.2%-0.4%, sulfonated lignin graft copolymer 0.1%-0.3%, silicon-based anti-wind erosion agent 0.1%-0.2%, propylene glycol 0.1%-0.2%, tea polyphenol extract 0.04%-0.06%, and water 97.85%, with the error controlled within ±0.001g; S25: detecting the purity of the raw materials by atomic absorption spectrometry to verify that there is no heavy metal residue. S26: Verify the compatibility between raw materials by observing whether precipitation or stratification occurs during the premixing test to detect the mixing stability; S27: Calculate the allocation ratio of each component according to the orthogonal experimental design, and detect the sodium dodecyl benzene sulfonate content in the range of 0.4%-0.6% to meet the optimization requirements of the formula.
5. The method according to claim 3, wherein the method is characterized in that: When optimizing the mixing process, the following steps are included: S31: Use single-factor tests to screen wetting agents, compare the surface tension performance of sodium dodecyl benzene sulfonate and sodium lignosulfonate, and determine the best type of wetting agent; S32: Determine the optimal concentration range of glycerol through water retention tests, which is 0.3%-0.5%; S33: Use NDJ-5S digital rotary viscometer to measure the viscosity of the mixed solution, adjust the amount of carboxymethyl cellulose to 0.2%-0.4%, and optimize the film-forming performance; S34: Control the temperature at 25±2℃ and the stirring speed at 300rpm during the mixing process, and detect whether each component is fully dissolved and there is no local overheating phenomenon; S35: Add silicon-based anti-erosion agent and continue stirring for 30 minutes to form a uniform and stable composite system, improving the anti-erosion ability of the dust suppressant; S36: Observe the microstructure of the mixed solution through SEM scanning electron microscope to detect whether there is no particle agglomeration phenomenon and verify the uniformity of mixing; S37: Adjust the pH value to the range of 6-7, use a precision pH meter for real-time monitoring and correction, and detect whether the dust suppressant is neutral and non-corrosive.
6. The method according to claim 3, wherein the method is characterized in that: When performing performance testing and verification, the following steps are included: S41: Use Dataphysics-OCA20 surface tension meter to measure the surface tension values of different concentrations of surfactants to evaluate the wetting performance; S42: Perform permeability tests according to GB / T16913-2008 standard, record the penetration time and depth of the solution in the dust sample, and verify the penetration efficiency; S43: Determine the water absorption and moisture retention performance of the dust suppressant through water retention experiments, calculate the water retention rate within 60 minutes, and evaluate the water retention capacity; S44: Perform contact angle experiments, use JY-82B Kruss DSA contact angle measuring instrument to evaluate the wetting performance, and verify the affinity between the dust suppressant and the dust; S45: Simulate natural wind conditions through anti-erosion experiments, calculate the percentage of dust loss, and evaluate the anti-erosion effect of the dust suppressant; S46: Perform degradability experiments, bury the solidified layer in the soil and periodically detect the composition of the degradation products to verify the environmental performance; S47: Perform freeze-thaw resistance tests, verify the stability of the dust suppressant through freeze-thaw cycles, and detect whether it still maintains stable performance under extreme climate conditions.
7. The method according to claim 3, wherein the method is characterized in that: When designing the orthogonal experiment, the following steps are included: S51: Design a three-factor and three-level orthogonal experiment to determine the optimal combination of wetting agent, water-retaining agent, and binder to optimize the performance of the dust suppressant; S52: Use Design-Expert11 software for response surface analysis to establish a mathematical model of each factor and performance index, and predict the optimal parameters; S53: Determine the significance of the influence of each factor on the performance of the dust suppressant through variance analysis, identify the key influencing factors, and optimize the ratio. S54: Verify the reliability of the model by residual analysis, check if the error between predicted and actual values is less than 5%, and ensure the accuracy of the model; S55: Visualize the influence of each factor interaction on water retention and viscosity through response surface 3D graph, and intuitively show the optimization direction; S56: Determine the optimal process parameter combination, with sodium dodecyl benzene sulfonate content of 0.54% and glycerol of 0.45%, to maximize performance; S57: Conduct 5 parallel tests to verify the repeatability and stability of the optimal ratio, and detect that the experimental results are reliable and reproducible.
8. The method according to claim 3, wherein the method is characterized in that: When conducting experimental verification and optimization, the following steps are included: S61: Prepare dust suppressant samples under optimal ratio conditions, verify water retention, viscosity and pH value indicators, and detect whether they meet design requirements; S62: Compare performance with commercially available dust suppressants, evaluate advantages through wettability and wind erosion resistance, and verify innovation effect; S63: Conduct long-term stability test, store in 40°C constant temperature box for 30 days to observe whether stratification or precipitation occurs, and evaluate storage stability; S64: Simulate natural environmental conditions through accelerated aging test, verify weather resistance of dust suppressant, and detect long-term use effect stability; S65: Conduct biocompatibility test, detect whether degradation products are CO2 and H2O, and no toxic substances are released, and meet environmental protection standards; S66: Optimize addition amount of rhamnolipid and tea polyphenol extract through orthogonal experiment, improve antioxidant performance, and extend dust suppressant shelf life; S67: Verify synergistic effect of silicon-based wind erosion inhibitor and propylene glycol, improve wind erosion resistance and weather resistance of dust suppressant, and enhance comprehensive performance.
9. The method according to claim 3, wherein the method is characterized in that: When implementing the creative improvement scheme, the following steps are included: S71: Introduce response surface method to optimize preparation process, and improve comprehensive performance indicators of dust suppressant; S72: Add tea polyphenol extract to enhance antioxidant and antibacterial performance of dust suppressant, and improve environmental protection performance and biocompatibility of dust suppressant; S73: Use sulfonated lignin graft copolymer to improve bonding strength and film forming performance, and enhance film forming property and durability of dust suppressant; S74: Optimize sodium alginate concentration to 1%-3% range, enhance film forming property and water retention, and improve moisturizing and bonding effect of dust suppressant; S75: Add propylene glycol to improve flowability and spraying uniformity of dust suppressant, and detect that dust suppressant can uniformly cover dust surface; S76: Introduce silicon-based wind erosion inhibitor to improve wind erosion resistance and weather resistance of dust suppressant, and enhance stability of dust suppressant in harsh environment; S77: Ensure environmental protection performance through degradation products, and meet non-heavy metal and degradable requirements.
10. The method according to claim 3, wherein the method is characterized in that: When verifying degradation products and environmental protection, the following steps are included: S81: Bury dust solidification layer after spraying dust suppressant in soil, regularly detect degradation product composition, and verify that degradation process meets environmental protection requirements; S82: Analyze the degradation products by GC-MS, confirm that the main product is No toxic substances are released, ensuring environmental safety; S83: Conduct biodegradation experiment, verify degradation rate of dust suppressant in natural environment, and evaluate environmental friendliness; S84: Ensure that degradation products are harmless to soil microorganisms through toxicity test, and protect ecological environment and biodiversity; S85: Verify that degradation products are harmless to soil microorganisms through toxicity test, and protect ecological environment and biodiversity; S85: Conduct environmental performance evaluation to detect compliance with environmental standards during dust suppressant production and use, and achieve full life cycle environmental management; S86: Verify the environmental benefits of the dust suppressant through LCA life cycle assessment, and comprehensively assess its environmental impact and sustainability; S87: Establish a degradation product monitoring system to ensure long-term stability of environmental performance.