66 results about "Plastic pollution" patented technology

The invention belongs to the technical field of nanocellulose materials, and discloses a dissolved nanocellulose high-strength film and a preparation method thereof. The method comprises the following steps: 1) dissolving a cellulose raw material with a solvent to obtain a cellulose solution; 2) mixing the cellulose solution with a mixed solvent of water and ethanol, and performing nanoscale dispersion to obtain a dissolved nano cellulose dispersion; and 3) washing the dissolved nanocellulose dispersion, and forming a film to obtain the nanocellulose high-strength film. The method is simple, green and environmentally friendly, the prepared nano-cellulose high-strength film is high in light transmittance, the strength can reach 140-200 MPa, additional auxiliaries are not needed, the problem that an existing nano-cellulose film is poor in mechanical strength is solved, the contradiction between traditional plastic pollution and material strength and degradability is effectively solved, and conversion from the material industry to greenization and high performance is promoted.

The invention discloses a cellulose fiber-based sandwich structure filter material for removing micro-plastics and a preparation method of the cellulose fiber-based sandwich structure filter material, and belongs to the field of micro-plastic filtration. The preparation method comprises the following steps: (1) uniformly mixing cellulose long fibers and cellulose short fibers, and then carrying out suction filtration to respectively prepare an upper-layer fiber membrane and a lower-layer fiber membrane; (2) preparing a covalent cross-linking mixture from cellulose nanofibers as a base material, a silane coupling agent, an amino-containing polymer and water; (3) coating a fiber membrane with the covalent cross-linking mixture, and assembling to obtain a sandwich structure; and (4) freezing the obtained sandwich structure, and drying at normal pressure to obtain the cellulose fiber-based sandwich structure filter material. The obtained cellulose fiber-based sandwich structure filter material can effectively filter multi-scale micro-plastics in a graded manner, can effectively filter various micro-plastics and micro-plastics in various real water samples, and provides a novel environment-friendly solution for micro-plastic pollution abatement.

The invention relates to the technical field of waste plastic resource utilization, and particularly provides a method for preparing glycollic acid through high-selectivity photoelectrocatalytic oxidation of polyethylene glycol terephthalate (PET) plastic. The core of the method is that a carbon nitride film loaded and modified by heteroatom doping (sulfur / phosphorus and the like) and an oxidation co-catalyst (Ni (OH) 2, NiFeOOH and the like) is used as a photo-anode, and under the conditions of certain bias voltage, electrolyte pH and composition and light source wavelength, PET oxidation is guided to generate glycolic acid with high selectivity. According to the method, efficient conversion from the PET waste plastics to high-value chemicals is achieved, the Faraday efficiency of glycollic acid in the product can reach 75% or above, and an innovative technical path is provided for plastic pollution abatement and waste turning into wealth.

This invention relates to a microbial agent with highly efficient plastic degradation properties and its application, wherein the microbial agent contains *Cryptococcus lauriensis* strain with accession number CCTCC NO: M 2026232. Papiliotrema laurentii SNP7-2P strain and / or Achromobacterium with accession number CCTCC NO: M 2026231 Achromobacter strains FJ1-2L. These two microbial strains exhibit varying degrees of degradation effects on long-chain polymers in plastics, effectively and environmentally addressing plastic pollution and making them suitable for preparing green and environmentally friendly degradable plastic products.

The invention relates to the technical field of data detection, and discloses a micro-plastic pollution abatement effectiveness detection method based on big data coupling. In the aspect of pollution traceability, the method adopts a mode of combining multi-dimensional feature acquisition and a feature evolution model; the problem of traceability failure caused by feature drift in a traditional method is solved, the traceability effective time is prolonged, and the traceability accuracy is improved. In the aspect of migration prediction, the multi-process coupling model and physical and chemical parameter dynamic association mechanism established by the method can accurately simulate complex interaction behaviors in the micro-plastic transportation process, and the prediction error of a migration path is reduced. In the aspect of governance evaluation, the governance process conversion behavior analysis method and the multi-dimensional evaluation system established by the method can accurately distinguish true removal, pollution transfer and form conversion, and the situation that a governance scheme with appearance reaching the standard but the actual risk not reduced is misjudged as an effective scheme is avoided.

The present invention discloses an ecologically friendly disposable product, particularly for packaging and other diverse applications. The matrix of the product is primarily composed of moss and plant materials, offering a significant environmental benefit due to its complete biodegradability, eliminating the issue of plastic pollution and landfill. The unique composition of the product provides antibacterial, antiseptic, and anti-fungal properties, thus enhancing its shelf life and mitigating spoilage concerns. The product demonstrates impressive moisture retention capabilities lasting up to 8-12 hours, remarkable durability, remaining resistant to low temperatures, ultraviolet light, and alcohols, ensuring its functionality in a wide range of environmental conditions. This innovative product is not only highly functional but also adaptable, boasting a flexible design that caters to specific use cases. Notably, the production process includes the utilization of minimally processed nature-based ingredients from the food / wood industry side stream, maintaining the manufacturing process with low costs.

The invention discloses a composite microbial agent for degrading micro-plastics in seawater and a preparation method thereof, the microbial agent is composed of effective viable bacteria and auxiliary components, the effective viable bacteria are marine-derived halomonas, acinetobacter and bacillus and pseudomonas with high affinity with the micro-plastics, the effective viable bacteria are compounded according to a specific viable bacteria number ratio, and the microplastics are degraded by the auxiliary components. And function collaboration is realized. The auxiliary components comprise a protective agent consisting of trehalose, skimmed milk, glycerol and cane sugar, and a nutritional agent consisting of glucose and yeast extract. The preparation method comprises the following steps: respectively fermenting, centrifugally concentrating, compounding in proportion, mixing with auxiliary components, and finally drying to prepare powder. The invention further discloses application of the microbial inoculum to degradation of microplastics in beach intertidal zones and ship wastewater systems. The microbial agent is high in pertinence, good in stability in a high-salt seawater environment and high in degradation efficiency, and an effective solution is provided for in-situ bioremediation of marine micro-plastic pollution.

The application discloses a method for preparing PETG biodegradable copolyester from waste PET polyester. The method comprises the following steps: mixing waste PET polyester, alcoholysis agent and catalyst, heating to perform alcoholysis reaction, controlling alcoholysis reaction conditions to stop the reaction when the PET polyester is depolymerized into an oligomer with a number average molecular weight of 1000-2000 g / mol and a polymerization degree of 5-8, then supplementing monomers, and completing polycondensation reaction under high vacuum conditions to obtain PETG copolyester. The scheme has the advantages of simple process route, small catalyst consumption, no need to supplement catalyst during polycondensation reaction, low energy consumption, realization of conversion of non-degradable PET into biodegradable copolyester, and important significance for relieving plastic pollution problems.

The application discloses a regenerated cationic cellulose-based composite filter membrane and a preparation method and nanometer plastic removal application thereof, and belongs to the technical field of regenerated cellulose water treatment filter materials. In the application, a sodium hydroxide-urea-thiourea ternary system is used to fully dissolve cellulose, the cellulose is modified by 2,3-epoxypropyl trimethylammonium chloride cation, a PVDF membrane is used as a base, and a hydrophilic composite filter membrane is prepared by vacuum filtration and loading of a cationized cellulose layer. The preparation process is mild, and the defects of the traditional cellulose membrane, such as insufficient dissolution, uneven pore size and poor screening precision, are solved. The filter membrane surface is positively charged, the hydrophilicity is greatly improved, the water contact angle is only 39°, the particle size of 50-500 nm carboxylated nanometer plastics can be efficiently intercepted, the removal efficiency of 100 nm polystyrene nanometer plastics reaches 97.01%, and the water flux is excellent. The process is green and low-cost, can remove polystyrene, polymethyl methacrylate and polyvinyl chloride nanometer plastics in a wide range, and has a good engineering application prospect in the field of deep treatment of water body nanometer plastic pollution.

The invention discloses a sea grass preservative film and a preparation method thereof, and relates to the technical field of preservative film preparation. Aiming at the problems of serious pollution and difficult degradation of the existing plastic product, the invention takes sea grass and starch as core raw materials and is prepared by the steps of sea grass raw material pretreatment, extract preparation, gel mixture preparation, calcium ion crosslinking, airing and the like. The seaweed extract and the starch are subjected to synergistic interaction through hydrogen bond physical crosslinking and thermal gelation to form a stable film structure, the raw materials are food-grade, and the seaweed film has toughness and complete degradability, is free of harm to the environment and human bodies, can be widely applied to food packaging, field film covering, packaging products and other scenes, effectively replaces traditional plastic products, and solves the problem of plastic pollution.

This application provides a method for preparing environmentally friendly clothing fasteners made from marine recycled PET, relating to the field of environmentally friendly clothing accessory manufacturing technology. The use of marine recycled PET material in this application reduces the demand for virgin plastics and decreases the consumption of non-renewable resources such as petroleum; it effectively reduces plastic pollution in the ocean and protects the marine ecological environment; compared to virgin PET materials, it saves energy and reduces carbon footprint; marine recycled PET fasteners are derived from the same source as polyester clothing fabrics, enabling "material homogeneous recycling" of clothing; furthermore, the cellulose nanocrystals (CNC) in the reinforcing phase composite are derived from renewable resources and are biodegradable, further enhancing the green sustainability of the environmentally friendly fasteners; the graphene-cellulose nanocrystal CNC composite is compounded and combined in a silane coupling agent ethanol solution to form an interpenetrating network structure, thereby synergistically improving the strength, rigidity, toughness, and heat resistance of marine recycled PET, and increasing tensile strength.

The invention discloses a microplastic distribution prediction and tracing method, and relates to the field of model detection. Collecting multi-source monitoring data of a target water area, and performing space-time alignment processing on the multi-source monitoring data to generate a structured space-time data set; constructing a three-dimensional ocean current dynamic model of the target water area, simulating ocean current field distribution under different time-space conditions by using ocean environment auxiliary data, and extracting ocean current dynamic characteristic data; processing the spatio-temporal data set and the ocean current dynamic characteristic data through a micro-plastic prediction sub-model, and predicting and outputting a micro-plastic diffusion path and a micro-plastic concentration prediction value of each monitoring station; and processing the current micro-plastic distribution data and the ocean current dynamic characteristic data through the micro-plastic tracing sub-model, and predicting and outputting the current micro-plastic distribution backtracked estuary pollution source. According to the scheme, prediction of the micro-plastic diffusion path and tracing of the pollution source are achieved, the micro-plastic diffusion path can be accurately predicted, the pollution source can be accurately traced, and the efficiency and accuracy of marine micro-plastic pollution treatment are improved.

The application discloses a cadmium-resistant proteus mirabilis and application thereof in treatment of composite pollution environment. Priestia megaterium The application provides a PBAT-degrading bacterium, i.e., a proteus mirabilis (S261-3) strain, which can grow at a temperature of 10-50 DEG C and has certain salt and cadmium resistance, and can grow normally in a high-salt or high-cadmium concentration range. Meanwhile, the S261-3 strain has a good PBAT-degrading effect, and can degrade PBAT under cadmium stress, and can be used for degrading plastic pollutants in cadmium-polluted soil. The microbial strain provided by the application has stronger adaptability to a polluted environment, meets the repair demand of a composite pollution site, can be used for comprehensive treatment of microplastic and heavy metal composite pollution, is helpful to improving soil quality and improving land utilization efficiency, and has important practical significance for soil composite pollution repair.

The invention discloses a one-pot preparation method of a waste plastic-to-metal organic framework, which comprises the following steps: (1) dispersing polyethylene glycol terephthalate in N, N-dimethylformamide to obtain a mixed solution; (2) mixing the mixed solution with an N, N-dimethylformamide solution of metal salt, adding terephthalic acid, and carrying out a constant-temperature reaction; and (3) after the reaction is finished, centrifuging, washing and drying to obtain the metal organic framework. According to the method, N, N-dimethylformamide is used as a solvent system, and synthesis of the metal organic framework with mild and controllable reaction temperature can be realized through depolymerization of polyethylene glycol terephthalate and autocatalytic reaction of water molecules in metal salt crystal water. The polyethylene glycol terephthalate used in the method can be derived from waste plastic products, the utilization efficiency is high, the obtained metal organic framework is good in advanced oxidative degradation effect, the resource cost of waste plastic can be effectively reduced, and waste plastic pollution control is achieved.

The present application relates to the technical field of food packaging materials, and particularly relates to an oil-proof packaging material for food contact paper and a preparation process thereof. The oil-proof packaging material for food contact paper is prepared by the following steps: preparing a citraconic acid fermentation liquor, preparing methyl succinic acid by hydrogenation reaction of the citraconic acid, and preparing the oil-proof packaging material for food contact paper. The present application realizes the full-chain green preparation from straw to bio-based methyl succinic acid, and produces degradable polymer particles on the basis. The bio-based methyl succinic acid endows the oil-proof packaging material for food contact paper with the characteristics of renewability and biodegradability, helps to solve the problem of plastic pollution, and in terms of material performance, the introduction of bio-based monomers can optimize the polymer chain structure, improve the barrier effect of the film on oil, make the film thinner and tougher, and thus improve the oil-proof capacity.

The application belongs to the field of rotary cultivators, and particularly relates to a saline-alkali soil under-mulching land preparation and stubble cleaning machine, which comprises a frame connected with a tractor, a land preparation and stubble cleaning assembly and a main transmission box with a transmission assembly, the land preparation and stubble cleaning assembly is transmissionally connected with a power output end of the tractor through the transmission assembly, the land preparation and stubble cleaning assembly comprises a connecting frame with a secondary transmission box below the mulching film, a single-shaft smashing cutter arranged below the connecting frame, the single-shaft smashing cutter comprises a fixed cutter shaft with an upper end fixedly connected with the secondary transmission box, an annular stirring fin connected with the fixed cutter shaft through a rotating sleeve, the rotating sleeve is located in the secondary transmission box and transmissionally connected with the transmission assembly, the fixed cutter shaft is provided with a cutter located on the inner side of the annular stirring fin, and the connecting frame is provided with a first plow blade at the front end, without breaking or lifting the mulching film, the labor intensity is effectively reduced, the soil micro-plastic pollution is reduced, the soil water evaporation is reduced, and the soil salinization is improved.

The invention relates to the field of soil pollution remediation, and discloses a micro-ecological reconstruction and remediation method for micro-plastic polluted soil, which comprises the following steps: firstly, screening and enriching micro-plastic degradation functional florae which have the advantages of pseudomonas and bacillus, and the bacillus can secrete lipase and protease; the preparation method comprises the following steps: mixing biomass charcoal prepared by pyrolysis of corn straws with a functional bacterium suspension for adsorption, and carrying out sodium alginate-calcium chloride crosslinking to prepare an immobilized composite repairing agent; applying a repairing agent accounting for 1-5% of the mass of the soil, uniformly mixing the repairing agent with the soil, regulating the soil humidity to 20-30% and the carbon-nitrogen ratio to (15-25): 1, and maintaining the environment temperature of 15-35 DEG C; microplastics are removed through the synergistic effect of biomass charcoal adsorption and functional flora enzymatic degradation, beneficial microorganisms are enriched synchronously, and functional gene expression is activated; the problems that in the prior art, functional flora planting is difficult, the degradation efficiency is low, micro-ecological restoration is deficient, and the environmental adaptability is poor are solved.

The application relates to the technical field of environmental risk assessment, in particular to a water environment micro-plastic risk assessment method under multiple environmental factors, which comprises the following steps: constructing a micro-plastic pollution database and a multiple environmental factor resource database; pre-processing and feature engineering are performed on original data, core environmental driving factors are screened, and a standardized modeling data set is formed; a risk assessment model is constructed by fusing a harmful outcome path framework, a micro-plastic risk quantitative value is calculated by a weighted comprehensive index method or a machine learning algorithm; a final risk grade is determined in combination with a risk grade division standard and a toxic polymer adjustment mechanism, and an environmental management decision suggestion is output. The application solves the problems of single evaluation index, insufficient consideration of environmental factors, weak machine interpretation and insufficient prediction ability in the prior art, and realizes accurate and dynamic risk assessment of water environment micro-plastic pollution.

The invention discloses a self-degradable plastic and a preparation method thereof, and belongs to the technical field of agricultural planting environment-friendly materials, organic acid is added when the plastic is prepared, the plastic with self-degradation capacity is prepared, and the plastic can be self-split after being naturally placed for 35-49 days. The method provided by the invention can effectively improve the difficulty in degradation of the plastic, the process is simple and easy to implement, the cost is economical and practical, natural degradation of plastic pollutants is effectively realized, and the method has great significance for environmental protection.

The invention provides a degradable slow-release fertilizer and a preparation method thereof, the degradable slow-release fertilizer comprises a continuous phase base material and urea particles dispersed in the continuous phase base material, and the material of the continuous phase base material comprises polyhydroxyalkanoate. The multi-core problems in the current slow release fertilizer field are solved: firstly, the defects of micro-plastic pollution, unstable release, high chemical synthesis fertilizer cost, dislocated release, fluctuating inhibitor fertilizer effect and soil micro-ecology damage of the traditional physical coated fertilizer (synthetic resin and sulfur coating) are overcome; 2, PLA needs industrial compost, PBAT degradation is too long, long-acting slow release cannot be adapted to soil, and blending with urea is easy to separate; and 3, the PHA is close to the melting point of urea, so that phase separation is easily caused by melt blending, and the PHA is difficult to serve as a slow-release base material. Finally, a scheme which is full-degradable, slow-release and controllable and can be used for industrial production is provided. The invention also provides a preparation method of the degradable slow-release fertilizer.

The invention discloses cadmium-resistant P.megaterium and an application of the cadmium-resistant P.megaterium in treatment of a combined polluted environment. The invention provides a PBAT (poly (butyleneadipate-co-terephthalate)) efficient degradation bacterium, namely, a Pristia megaterium S261-3 strain, and the strain can grow at the temperature of 10-50 DEG C, has certain salt and cadmium resistance, and can normally grow in a relatively high salt or cadmium concentration range. Meanwhile, the S261-3 strain has a good degradation effect on PBAT, can also degrade PBAT under cadmium stress, and can be used for degrading plastic pollutants in cadmium-polluted soil. The microbial strain provided by the invention has stronger adaptability to polluted environment, meets the repair requirement of a combined pollution site, can be used for comprehensive treatment of micro-plastic and heavy metal combined pollution, is beneficial to improvement of soil quality and improvement of land utilization efficiency, and has important practical significance for soil combined pollution repair.

Stenotrophomonas maltophilia, microbial agent, use and method. The stenotrophomonas maltophilia QY1 strain provided in the application can grow rapidly with nanometer polystyrene as the only carbon source, can significantly reduce the concentration and molecular weight of plastic, and can degrade polystyrene into styrene monomer. The widespread plastic pollution in the environment still has a wide demand for degrading bacteria, and the present technology enriches the plastic degrading bacteria resource library. The plastic degrading bacterial strain enrichment method provided in the application can aim at the difficulties in enriching plastic degrading bacteria, create an enrichment scene that is conducive to stimulating growth and gradual domestication, is simple to operate, low in cost, and can high-throughput enrich plastic degrading bacterial strains.

The utility model belongs to the technical field of water treatment, and relates to a whole house water purifier with pressure stabilizing and water purifying functions, which comprises a ceramic membrane component with a ceramic membrane filter element, a water inlet of the ceramic membrane component is connected with a water inlet pipeline, a water outlet of the ceramic membrane component is connected with a water producing pipeline, and a discharge outlet of the ceramic membrane component is connected with a discharge pipeline. The water inlet pipeline is connected with a municipal water network and is provided with an intelligent booster pump for supplementing the pressure drop of the water production pipeline, the water production pipeline is connected with a water terminal and is provided with an air bag tank and a water production valve, the discharge pipeline is provided with a discharge valve, and the air bag tank, the water production pipeline, the ceramic membrane assembly and the discharge pipeline form a backwashing channel. And the intelligent booster pump drives the air tank in the air bag tank to be compressed to a critical state. The whole-house water purifier with the pressure stabilizing and water purifying functions has the advantages of being simple in structure, convenient to use, large in produced water flux, free of micro-plastic pollution and fluoride pollution, capable of being backwashed, long in filter element service life, stable in produced water pressure and the like.

The invention relates to the technical field of nano-plastic detection methods, and discloses a nano-plastic enrichment method based on inorganic flocculation and a quantitative detection method thereof, and the method comprises the following steps: S1, adding an alkaline solution and a polyferric sulfate solution into a water sample to be detected to form ferric hydroxide floc; s2, after centrifugal treatment, collecting a compound formed by the ferric hydroxide floc and the nano plastic; and S3, carrying out ethanol resuspension and drying treatment on the compound. The nano-plastic enrichment method based on inorganic flocculation is simple and convenient to operate, low in cost and high in efficiency, introduction of organic interferents is avoided, the sensitivity and accuracy of Py-GC / MS detection are remarkably improved, and the nano-plastic enrichment method is suitable for environmental monitoring, drinking water safety evaluation and nano-plastic pollution risk research.

The invention belongs to the technical field of agricultural cultivation, and particularly relates to a method for improving disease resistance by regulating and controlling pear garden soil microflora based on non-woven fabric coverage. According to the method, the pear garden soil is covered with polylactic acid-based biodegradable non-woven fabric, and the soil microbial structure is adjusted in cooperation with a compound microbial agent containing bacillus or actinomycetes. The polylactic acid-based non-woven fabric has good heat insulation and water retention effects, can stabilize the temperature and humidity of soil, can be naturally degraded, and has no environmental pollution risk; after degradation, proliferation of beneficial antagonistic bacteria can be promoted, and growth of pathogenic microorganisms is inhibited. The compound microbial agent can further inhibit the growth of pathogenic microorganisms and enhance the disease resistance of pear trees. The problem of micro-plastic pollution of a traditional plastic mulching film can be effectively solved, and the requirements of green agriculture and sustainable development are met.

The invention relates to the technical field of high polymer material synthesis and modification. The invention relates to a polyester amide, in particular to a degradable polyester amide and a preparation method thereof. The structural general formula of the polyesteramide is shown in the specification; wherein the polyesteramide has an A-B fragment structure; m and n are respectively expressed by mass percent of the fragment A and the fragment B in the polyesteramide, m + n = 100%, and m = 10-50%; x represents a straight chain carbon number and is an integer selected from 2-10; the polyesteramide is formed by polycondensation of alcoholysis oligomer of nylon 6 and 1, 10-sebacic acid. The polyesteramide can maintain excellent mechanical properties such as mechanical strength, wear resistance and the like similar to nylon 6, and also has a controllable degradation characteristic in a seawater environment, so that the stable performance of the polyesteramide in a marine fishery service period is ensured, the polyesteramide can be degraded under a specific marine environment condition after being discarded, long-term residue is avoided, and the service life of the polyesteramide is prolonged. 'ghost fishing gear 'and micro-plastic pollution are reduced from the source, and green and sustainable development of marine fishery is promoted.

The utility model belongs to the technical field of mytilus coruscus spat separation cultivation, and particularly relates to a mytilus coruscus spat separation attachment device which comprises a loading unit which comprises a bottom plate, a temporary storage bin, supporting legs, a connecting arc pipe and an electromagnetic flow valve and is used for temporarily storing separated mytilus coruscus spats. According to the mussel seedling attaching device, the loading unit, the guiding unit and the attaching unit are used in cooperation, mussel seedlings are evenly distributed in the bag body and effectively attached to the outer surface of the elastic brush, the bag body can be rapidly detached only in the direction of the guiding groove, the attaching efficiency of the mussel seedlings is improved, and the labor intensity of workers is reduced. Through the combination of the degradable jute bag body and the elastic brush, traditional plastic pollution is avoided, a bionic attachment surface is formed, and the attachment rate of the young mussels is remarkably increased; the PVC pipe is driven to incline through the inclining unit, the PVC pipe inclines to drive the bag body to incline, and therefore water in the bag body is separated, the bag body is prevented from being degraded too early, and the practicability and applicability of the device are further improved.

The application discloses a full-natural-field degradable material and a preparation method and application thereof. The full-natural-field degradable material comprises the following raw materials in parts by weight: biodegradable polyester 50-96 parts; biological enzyme 2-20 parts; degradation aid 2-20 parts; and inorganic filler 0-10 parts. Through reasonable formula collocation, the material can be degraded by more than 90% in the full natural field within 1-8 months, effectively overcoming the plastic pollution problem caused by the slow degradation or even non-degradation of traditional plastics and biodegradable polyester materials in the natural environment. Meanwhile, the material can be used for more than one year at room temperature and low humidity, and can replace the traditional difficult-to-degrade plastics such as polyethylene, polyethylene terephthalate, polyamide and polypropylene to be applied to the preparation of biodegradable products.

The invention discloses a programmable degradable polyurethane coated controlled-release fertilizer based on crystal phase change and a preparation method thereof, and belongs to the technical field of controlled-release fertilizer production. A bio-based polyurethane material with specific ester bond density is used as an enzymolysis sensitive layer, heat-resistant microbial spores isolated and protected by a mesoporous carrier are combined, and by designing nutrient-dependent crystallization characteristics, volume shrinkage is triggered to generate microcracks after nutrient release is completed, and the cracks penetrate through a compact layer on the surface of the carrier, so that soil nutrients are in contact with the spores, and the soil quality is improved. And activating enzymolysis degradation. And timely and complete degradation of the membrane shell in a set period is realized, so that the micro-plastic pollution is thoroughly eliminated while the crop yield is improved.