Slope biomineralization protection method and system
By combining bentonite-carbon nanotube composite carriers with signal capsules and reaction capsules, the problems of spore stress resistance, germination efficiency and distribution uniformity were solved, achieving stability and high efficiency of slope biomineralization protection and forming a long-term protective effect of biological reinforcement and chemical bonding.
Patent Information
- Application Number
- CN202511998113.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-28
- Publication Date
- 2026-02-24
AI Technical Summary
In existing slope biomineralization protection methods, spores exhibit insufficient stress resistance, poor germination efficiency, and uneven distribution, resulting in poor stability and efficiency.
A bentonite-carbon nanotube composite carrier was prepared by ultrasonic dispersion. The carrier was combined with signal capsules and reaction capsules, mixed with graded fine sand and short-cut basalt fibers, laid on the slope surface and planted with vegetation. The three-stage time-series remediation was triggered by rainwater infiltration.
It increases spore survival rate to over 80%, shortens germination cycle to within 48 hours, ensures uniform distribution of calcium carbonate precipitation, increases soil compressive strength by 30%-50%, and improves crack resistance by 40%. The synergistic reinforcement of vegetation growth and mineralization layer formation achieves long-term protection.
Smart Images
Figure CN121556483A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of ecological protection technology in geotechnical engineering, and in particular to a method and system for slope biomineralization protection. Background Technology
[0002] In the field of slope ecological protection, microbial-induced calcium carbonate precipitation technology has been widely used due to its advantages of being green and environmentally friendly and having good compatibility with soil. Among them, the split-type adaptive biomineralization capsule solves the problem of poor reaction controllability of traditional MICP technology through three-level time-series regulation of "signal-germination-response".
[0003] However, existing germination capsules mostly use bentonite as the spore carrier, which has two major limitations: insufficient spore stress resistance and poor germination efficiency and distribution uniformity. Therefore, there is an urgent need to develop a new spore carrier material that combines the functions of "stress protection, activity stimulation, and uniform dispersion" to overcome the application bottleneck of existing split capsules in extreme environments and improve the stability and efficiency of slope biomineralization protection. Summary of the Invention
[0004] The main objective of this application is to provide a method and system for slope biomineralization protection, which aims to solve the technical problems in related technologies where the stability and efficiency of slope biomineralization protection are poor due to insufficient spore resistance, poor germination efficiency and distribution uniformity.
[0005] To achieve the above objectives, this application provides a method for slope biomineralization protection, the method comprising:
[0006] Bentonite-carbon nanotube composite carriers, signal capsules, and reaction capsules were prepared separately. The bentonite-carbon nanotube composite carrier was obtained by ultrasonically dispersed bentonite and multi-walled carbon nanotubes in a preset mixing ratio. The specific surface area of the bentonite-carbon nanotube composite carrier was 800-1000 m² / g.
[0007] By combining the bentonite-carbon nanotube composite carrier with germination capsules, germination capsules containing the composite carrier were obtained.
[0008] Signal capsules, reaction capsules, and germination capsules containing composite carriers are mixed with graded fine sand and short-cut basalt fibers to obtain capsule-aggregate mixtures;
[0009] The capsule-aggregate mixture is laid on the slope surface, covered with topsoil and planted with vegetation, and the three-stage time-series remediation is triggered by rainwater infiltration.
[0010] In one possible embodiment of this application, the step of preparing the bentonite-carbon nanotube composite support includes:
[0011] Bentonite was added to deionized water and ultrasonically dispersed. Then, 1% by mass of silane coupling agent was added and stirred at 70°C for 2 hours to obtain pretreated bentonite.
[0012] Pretreated bentonite and multi-walled carbon nanotubes were mixed at a mass ratio of 3:1, deionized water was added to form a suspension, and the mixture was subjected to ultrasonic treatment and vacuum freeze-drying to obtain a bentonite-carbon nanotube composite carrier.
[0013] In one possible embodiment of this application, the multi-walled carbon nanotubes have a diameter of 10-20 nm and a length of 5-10 μm.
[0014] In one possible embodiment of this application, the reaction capsule includes a wall material and a core material; the wall material is a sodium alginate-chitosan composite cohesive layer, and the core material is composed of calcium chloride + trace pH indicator.
[0015] In one possible embodiment of this application, the step of mixing signal capsules, reaction capsules, and germination capsules containing composite carriers with graded fine sand and short-cut basalt fibers to obtain a capsule-aggregate mixture includes:
[0016] Signal capsules, germination capsules containing composite carriers, and reaction capsules are mixed in a mass ratio of 1:2:3 and then uniformly stirred with graded fine sand and short-cut basalt fibers to obtain a capsule-aggregate mixture. The total mass of the three types of capsules accounts for 2%-3% of the dry mass of the aggregate, ensuring that the bentonite-carbon nanotube composite carrier and spores are evenly distributed in the aggregate.
[0017] In one possible embodiment of this application, the length of the chopped basalt fiber is 5-8 mm, and the mass of the chopped basalt fiber accounts for 0.3%-0.5% of the dry mass of the aggregate.
[0018] In one possible embodiment of this application, the step of laying the capsule-aggregate mixture on the slope surface includes:
[0019] The mixture is laid on the surface of the slope to be protected, with a thickness of 10-15cm and a compaction degree of ≥90%.
[0020] In one possible implementation of this application, the thickness of the planting soil cover is 5-8 cm.
[0021] This application also provides a slope biomineralization protection system, which includes:
[0022] The preparation module is used to prepare bentonite-carbon nanotube composite carriers, signal capsules and reaction capsules respectively. The bentonite-carbon nanotube composite carrier is obtained by treating ultrasonically dispersed bentonite and multi-walled carbon nanotubes according to a preset mixing ratio. The specific surface area of the bentonite-carbon nanotube composite carrier is 800-1000m² / g.
[0023] The module is used to combine the bentonite-carbon nanotube composite carrier with the germination capsule to obtain the germination capsule containing the composite carrier.
[0024] The mixing module is used to mix signal capsules, reaction capsules, and germination capsules containing composite carriers with graded fine sand and short-cut basalt fibers to obtain capsule-aggregate mixtures;
[0025] The laying module is used to lay the capsule-aggregate mixture on the slope surface, cover it with topsoil and plant vegetation, and trigger three-stage time-series remediation through rainwater infiltration.
[0026] This application provides a method and system for slope biomineralization protection. The method involves preparing a bentonite-carbon nanotube composite carrier, signal capsules, and reaction capsules, and combining the bentonite-carbon nanotube composite carrier with germination capsules to obtain germination capsules containing the composite carrier. The signal capsules, reaction capsules, and germination capsules containing the composite carrier are then mixed with graded fine sand and short-cut basalt fibers to obtain a capsule-aggregate mixture. This capsule-aggregate mixture is laid on the slope surface, covered with topsoil, and planted with vegetation, triggering a three-stage time-series remediation process through rainwater infiltration. In this application, bentonite and multi-walled carbon nanotubes are treated according to a preset mixing ratio to prepare a bentonite-carbon nanotube composite carrier. The bentonite-carbon nanotube composite carrier is used as a germination capsule. The high specific surface area of the bentonite-carbon nanotube composite carrier enables efficient spore loading. The conductivity and biocompatibility of carbon nanotubes can resist extreme environments such as drought and high salinity. The dispersibility of the composite carrier avoids spore aggregation, allowing calcium carbonate precipitation to be evenly distributed in the slope soil. This breaks through the application bottleneck of existing split capsules in extreme environments and improves the stability and efficiency of slope biomineralization protection. Attached Figure Description
[0027] Figure 1 This is a flowchart illustrating the first embodiment of the slope biomineralization protection method of this application.
[0028] Figure 2 This is a scanning electron microscope image of the bentonite-carbon nanotube composite carrier involved in the slope biomineralization protection method of this application. Detailed Implementation
[0029] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.
[0030] This application provides a method for slope biomineralization protection. In the first embodiment of this application's slope biomineralization protection method, refer to... Figure 1 The methods include:
[0031] Step S10: Prepare bentonite-carbon nanotube composite carrier, signal capsule and reaction capsule respectively. The bentonite-carbon nanotube composite carrier is obtained by ultrasonically dispersed bentonite and multi-walled carbon nanotubes according to a preset mixing ratio. The specific surface area of the bentonite-carbon nanotube composite carrier is 800-1000m² / g.
[0032] It should be noted that the slope biomineralization protection method can be applied to slope biomineralization protection devices, which belong to slope biomineralization protection systems, and these systems are slope biomineralization protection equipment.
[0033] It should be noted that the use of a single type of bentonite in related technologies has two major limitations:
[0034] Insufficient spore resistance: Bentonite alone can only provide basic physical encapsulation and cannot resist extreme environments in slope soil (such as dehydration caused by drought and osmotic pressure stress in high-salt soil), resulting in low spore survival rate. In slope protection in arid and semi-arid regions, the spore germination rate is less than 30%, which seriously affects the mineralization effect.
[0035] Poor germination efficiency and distribution uniformity: Bentonite particles tend to agglomerate, resulting in uneven spore distribution in the capsule core material. After release, the spore concentration is too high in some areas (easily competing for nutrients) and too low in others (insufficient mineralization). Moreover, bentonite has no active stimulating function, and the spores need to be activated naturally by the environment, resulting in a long germination cycle (usually more than 72 hours), which cannot quickly respond to the need for repairing sudden microcracks in slopes.
[0036] Based on the aforementioned problems, this application employs a bentonite-carbon nanotube composite carrier to address the technical issues in the prior art, with the following beneficial effects:
[0037] Enhancement of the basic functions of bentonite: retaining the high adsorption capacity and nucleation site function of bentonite, improving its dispersibility through modification treatment to avoid aggregation;
[0038] Functional complement of carbon nanotubes: Utilizing the high specific surface area, conductivity and biocompatibility of carbon nanotubes, "highly efficient spore loading - active stimulation - stress protection" is achieved, forming a functional complement with bentonite, ultimately improving spore survival rate (≥80%), shortening the germination cycle (≤48h), and ensuring uniform distribution of mineralization products.
[0039] It should be noted that the protective method mainly uses materials including signal capsules, germination capsules and reaction capsules; the core material of the germination capsule contains Bacillus pasteurellosis spores, bentonite-carbon nanotube composite carrier and micronutrient solution. The bentonite-carbon nanotube composite carrier is made by combining pretreated bentonite and multi-walled carbon nanotubes at a mass ratio of 3:1, with a specific surface area of 800-1000m² / g.
[0040] Specifically, the signal capsule is composed of the following:
[0041] Wall material: Low concentration xanthan gum (2%-5% by mass) to ensure rapid response to water penetration, with a cracking time ≤2h.
[0042] Core material: Urea (nutrient signal source, accounting for 60%-80% of the core material by mass), consistent with existing signal capsules, used to provide initial nutrition for spores released by germination capsules.
[0043] Among them, signal capsules, germination capsules containing composite carriers, and reaction capsules are used, and the average particle size of the three types of capsules is controlled to be 100-200μm to ensure uniform mixing.
[0044] The step of preparing the bentonite-carbon nanotube composite support in step S10 includes:
[0045] Bentonite was added to deionized water and ultrasonically dispersed. Then, 1% by mass of silane coupling agent was added and stirred at 70°C for 2 hours to obtain pretreated bentonite.
[0046] Pretreated bentonite and multi-walled carbon nanotubes were mixed at a mass ratio of 3:1, deionized water was added to form a suspension, and the mixture was subjected to ultrasonic treatment and vacuum freeze-drying to obtain a bentonite-carbon nanotube composite carrier.
[0047] It is important to understand that the preparation method of the bentonite-carbon nanotube composite carrier is as follows:
[0048] Bentonite pretreatment: Sodium-based bentonite was added to deionized water and ultrasonically dispersed (300W power, 30min time). 1% by mass of silane coupling agent (KH550) was added and stirred at 70℃ for 2h. After modification, the dispersibility was improved and agglomeration was avoided.
[0049] Composite carrier synthesis: Pretreated bentonite was mixed with multi-walled carbon nanotubes (10-20 nm in diameter, 5-10 μm in length) at a mass ratio of 3:1. Deionized water was added to form a suspension, which was then ultrasonically treated (500 W for 60 min) and freeze-dried under vacuum (-50 °C, 0.1 Pa) to obtain a powdered composite carrier. This carrier has a specific surface area of 800-1000 m² / g, which is 3-4 times that of bentonite alone. Furthermore, the conductivity of the carbon nanotubes can stimulate spore activity and increase germination rate under soil microcurrent (0.1-1 μA / cm²). A schematic diagram of the bentonite-carbon nanotube composite carrier is shown below. Figure 2 As shown.
[0050] The reaction capsule consists of a wall material and a core material; the wall material is a sodium alginate-chitosan composite cohesive layer, and the core material is composed of calcium chloride and trace amounts of pH indicator.
[0051] It is important to understand that the reaction capsule is composed of the following:
[0052] Wall material: Sodium alginate-chitosan composite coagulation layer (crosslinking degree 60%-70%), which delays rupture and lags germination capsules by 5-8 hours, ensuring that spores germinate and produce enzymes before releasing calcium source;
[0053] Core material: Calcium chloride (calcium source, accounting for 90% of the core material) + trace pH indicator (bromocresol green). The pH indicator can provide direct feedback on the enzyme production process of microorganisms (when enzyme production occurs, the pH drops to 6.5-7.0, and the indicator changes from blue to yellow), helping to determine the timing of calcium source release.
[0054] Step S20: Combine the bentonite-carbon nanotube composite carrier with the germination capsule to obtain a germination capsule containing the composite carrier.
[0055] It should be noted that combining the bentonite-carbon nanotube composite carrier with the germination capsule yields a germination capsule containing the composite carrier, the composition of which is as follows:
[0056] Wall material: Gelatin-xanthan gum composite (mass ratio 1:1), which needs to accumulate moisture to the point where the soil moisture content is ≥15% to break down, ensuring a time-series response with the signal capsule, with the breakage time lagging the signal capsule by 3-5 hours;
[0057] Core material: composed of "Bacillus pasteurellosis spores + bentonite-carbon nanotube composite carrier + micronutrient solution (glucose)", with a mass ratio of 1:5:0.5.
[0058] Step S30: The signal capsule, reaction capsule, and germination capsule containing the composite carrier are mixed with graded fine sand and short-cut basalt fibers to obtain a capsule-aggregate mixture.
[0059] Step S30 includes:
[0060] Signal capsules, germination capsules containing composite carriers, and reaction capsules are mixed in a mass ratio of 1:2:3 and then uniformly stirred with graded fine sand and short-cut basalt fibers to obtain a capsule-aggregate mixture. The total mass of the three types of capsules accounts for 2%-3% of the dry mass of the aggregate, ensuring that the bentonite-carbon nanotube composite carrier and spores are evenly distributed in the aggregate.
[0061] The chopped basalt fibers are 5-8 mm in length and account for 0.3%-0.5% of the dry mass of the aggregate.
[0062] Step S40: Lay the capsule-aggregate mixture on the slope surface, cover it with topsoil and plant vegetation, and trigger the three-stage time-series remediation through rainwater infiltration.
[0063] The step of laying the capsule-aggregate mixture on the slope surface includes:
[0064] The mixture is laid on the surface of the slope to be protected, with a thickness of 10-15cm and a compaction degree of ≥90%.
[0065] It should be noted that the mixture should be laid on the surface of the slope to be protected, with a thickness of 10-15cm, and compacted (compaction degree ≥90%). A 5-8cm layer of planting soil should be placed on top of the mixture layer, and soil-stabilizing vegetation (such as bermudagrass or alfalfa) should be planted.
[0066] It should be noted that the rainwater infiltration triggers the remediation process: water first triggers the signal capsule to release urea, forming a nutrient zone; then the germination capsule ruptures, and the composite carrier releases spores, which germinate rapidly under the stimulation of carbon nanotubes and nutrient supply (germination rate ≥80% within 48 hours); finally, the reaction capsule releases calcium chloride, and the spores produce enzymes to hydrolyze urea to generate carbonate ions, which combine with calcium ions to form calcium carbonate precipitate, sealing microcracks in the slope; at the same time, the high adsorption capacity of the composite carrier can retain soil moisture and nutrients, providing a guarantee for vegetation growth, and after the vegetation roots penetrate, they form a synergistic reinforcement with the mineralized layer.
[0067] This embodiment can produce the following beneficial effects:
[0068] Enhancing spore stress resistance and germination efficiency: The high specific surface area of the bentonite-carbon nanotube composite carrier enables efficient spore loading. The conductivity and biocompatibility of carbon nanotubes can resist extreme environments such as drought and high salinity, increasing the spore survival rate to over 80% and shortening the germination cycle to within 48 hours, thus solving the problem of low mineralization efficiency of traditional carriers in harsh environments.
[0069] Optimize the distribution of mineralized products and the reinforcement effect: The dispersibility of the composite carrier avoids spore aggregation, so that calcium carbonate precipitation is evenly distributed in the slope soil, the compressive strength of the soil is increased by 30%-50%, the crack resistance is increased by more than 40%, and the development of shallow cracks in the slope is effectively inhibited.
[0070] Strengthening the ecological synergy effect: The composite carrier can retain soil moisture and nutrients. The ammonium salts produced by microbial mineralization and the nutrients adsorbed by the carrier jointly promote vegetation growth. The vegetation roots and the mineralized layer form a dual reinforcement of "biological reinforcement and chemical bonding", which makes the slope protection effect continuously enhanced over time and achieve long-term protection.
[0071] Excellent compatibility and stability: The composite carrier is fully compatible with existing split capsule systems without changing the capsule preparation process; and the carrier materials (bentonite and carbon nanotubes) are all environmentally friendly materials with no risk of soil pollution. The spore survival rate remains ≥90% during the storage period (after 6 months of storage), improving the practicality of the product.
[0072] This application provides a method for slope biomineralization protection. The method involves preparing a bentonite-carbon nanotube composite carrier, signal capsules, and reaction capsules, and combining the bentonite-carbon nanotube composite carrier with germination capsules to obtain germination capsules containing the composite carrier. The signal capsules, reaction capsules, and germination capsules containing the composite carrier are then mixed with graded fine sand and short-cut basalt fibers to obtain a capsule-aggregate mixture. This capsule-aggregate mixture is laid on the slope surface, covered with topsoil, and planted with vegetation, triggering a three-stage time-series remediation process through rainwater infiltration. In this application, bentonite and multi-walled carbon nanotubes are treated according to a preset mixing ratio to prepare a bentonite-carbon nanotube composite carrier. The bentonite-carbon nanotube composite carrier is used as a germination capsule. The high specific surface area of the bentonite-carbon nanotube composite carrier enables efficient spore loading. The conductivity and biocompatibility of carbon nanotubes can resist extreme environments such as drought and high salinity. The dispersibility of the composite carrier avoids spore aggregation, allowing calcium carbonate precipitation to be evenly distributed in the slope soil. This breaks through the application bottleneck of existing split capsules in extreme environments and improves the stability and efficiency of slope biomineralization protection.
[0073] This application embodiment also provides a slope biomineralization protection system, which includes:
[0074] The preparation module is used to prepare bentonite-carbon nanotube composite carriers, signal capsules and reaction capsules respectively. The bentonite-carbon nanotube composite carrier is obtained by treating ultrasonically dispersed bentonite and multi-walled carbon nanotubes according to a preset mixing ratio. The specific surface area of the bentonite-carbon nanotube composite carrier is 800-1000m² / g.
[0075] The module is used to combine the bentonite-carbon nanotube composite carrier with the germination capsule to obtain the germination capsule containing the composite carrier.
[0076] The mixing module is used to mix signal capsules, reaction capsules, and germination capsules containing composite carriers with graded fine sand and short-cut basalt fibers to obtain capsule-aggregate mixtures;
[0077] The laying module is used to lay the capsule-aggregate mixture on the slope surface, cover it with topsoil and plant vegetation, and trigger three-stage time-series remediation through rainwater infiltration.
[0078] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.
[0079] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.
[0080] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods of the various embodiments of this application.
[0081] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. A method for slope biomineralization protection, characterized in that, The method includes: Bentonite-carbon nanotube composite carriers, signal capsules, and reaction capsules were prepared separately. The bentonite-carbon nanotube composite carrier was obtained by treating ultrasonically dispersed bentonite and multi-walled carbon nanotubes according to a preset mixing ratio. The specific surface area of the bentonite-carbon nanotube composite carrier was 800-1000 m² / g. The bentonite-carbon nanotube composite carrier was combined with the germination capsule to obtain a germination capsule containing the composite carrier. The signal capsule, reaction capsule, and germination capsule containing a composite carrier are mixed with graded fine sand and short-cut basalt fibers to obtain a capsule-aggregate mixture. The capsule-aggregate mixture is laid on the slope surface, covered with topsoil and planted with vegetation, and the three-stage time-series remediation is triggered by rainwater infiltration.
2. The slope biomineralization protection method as described in claim 1, characterized in that, The steps for preparing the bentonite-carbon nanotube composite carrier include: Bentonite was added to deionized water and ultrasonically dispersed. Then, 1% by mass of silane coupling agent was added and stirred at 70°C for 2 hours to obtain pretreated bentonite. Pretreated bentonite and multi-walled carbon nanotubes were mixed at a mass ratio of 3:1, deionized water was added to form a suspension, and the mixture was subjected to ultrasonic treatment and vacuum freeze-drying to obtain a bentonite-carbon nanotube composite carrier.
3. The slope biomineralization protection method as described in claim 2, characterized in that, The multi-walled carbon nanotubes have a diameter of 10-20 nm and a length of 5-10 μm.
4. The slope biomineralization protection method as described in claim 1, characterized in that, The reaction capsule includes a wall material and a core material; The wall material is a sodium alginate-chitosan composite cohesive layer, and the core material consists of calcium chloride and trace amounts of pH indicator.
5. The slope biomineralization protection method as described in claim 1, characterized in that, The step of mixing the signal capsule, reaction capsule, and germination capsule containing a composite carrier with graded fine sand and short-cut basalt fibers to obtain a capsule-aggregate mixture includes: The signal capsule, the germination capsule containing the composite carrier, and the reaction capsule are mixed at a mass ratio of 1:2:3, and then uniformly stirred with graded fine sand and short-cut basalt fibers to obtain a capsule-aggregate mixture. The total mass of the three types of capsules accounts for 2%-3% of the dry mass of the aggregate, ensuring that the bentonite-carbon nanotube composite carrier and spores are evenly distributed in the aggregate.
6. The slope biomineralization protection method as described in claim 5, characterized in that, The length of the chopped basalt fiber is 5-8 mm, and the mass of the chopped basalt fiber accounts for 0.3%-0.5% of the dry mass of the aggregate.
7. The slope biomineralization protection method as described in claim 1, characterized in that, The step of laying the capsule-aggregate mixture on the slope surface includes: The mixture is laid on the surface of the slope to be protected, with a thickness of 10-15cm and a compaction degree of ≥90%.
8. The slope biomineralization protection method as described in claim 1, characterized in that, The thickness of the planting soil covering is 5-8cm.
9. A slope biomineralization protection system, characterized in that, The slope biomineralization protection system includes: The preparation module is used to prepare bentonite-carbon nanotube composite carriers, signal capsules, and reaction capsules respectively. The bentonite-carbon nanotube composite carrier is obtained by treating ultrasonically dispersed bentonite and multi-walled carbon nanotubes according to a preset mixing ratio. The specific surface area of the bentonite-carbon nanotube composite carrier is 800-1000 m² / g. The module is used to combine the bentonite-carbon nanotube composite carrier with the germination capsule to obtain a germination capsule containing the composite carrier. A mixing module is used to mix the signal capsule, reaction capsule, and germination capsule containing a composite carrier with graded fine sand and short-cut basalt fibers to obtain a capsule-aggregate mixture; The laying module is used to lay the capsule-aggregate mixture on the slope surface, cover it with topsoil and plant vegetation, and trigger three-stage time-series remediation through rainwater infiltration.