151 results about "Plastic pollution" patented technology

The invention relates to the technical field of land improvement, in particular to an alginic acid type multifunctional long-acting soil conditioner and a preparation method and application of the alginic acid type multifunctional long-acting soil conditioner. The core particle layer comprises an organic material, nano silicon, calcium magnesium polyphosphate, magnesium hydride, ammonium borate, rhamnose and an adhesive, and the slow release layer comprises clay minerals and alginate; the mass ratio of the clay mineral to the alginate to the organic material to the calcium magnesium polyphosphate to the nano silicon to the magnesium hydride to the ammonium borate to the rhamnose to the binder is controlled within a certain range. The soil conditioner provided by the invention is good in slow release performance, can release effective components durably and slowly, and has multiple effects of improving soil quality, providing nutrition, promoting crop growth, improving resistance and the like; the problems of soil acidification, heavy metal pollution, micro-plastic pollution, pesticide pollution, antibiotic pollution and the like in agricultural production can be effectively solved.

The invention discloses a biological environment-friendly clothing material with a self-cleaning function and a preparation method of the biological environment-friendly clothing material. According to the invention, the environmental friendliness is obviously improved, and natural components which can be completely biodegraded are adopted and can be quickly decomposed in the natural environment, so that the micro-plastic pollution is reduced; the self-cleaning function is enhanced, and through the synergistic effect of the bionic hydrophobic surface and photocatalytic decomposition, automatic falling and decomposition of stains are achieved; the durability is enhanced, a dynamic self-repairing network can automatically repair daily wear, the service life is prolonged, and the bio-based raw materials are natural, skin-friendly and excellent in air permeability. The supercritical fluid processing and microwave shaping technology replaces a high-energy-consumption process; emission of toxic substances is eliminated, and organic solvents and fluorine-containing compounds are forbidden in the whole process; raw material loss is reduced, and the using amount of functional materials is reduced through an accurate structure regulation and control technology; the maintenance cost is simplified, and the washing frequency and the use of chemical cleaning agents are reduced due to the self-cleaning characteristic; waste is compressed, and resource utilization of by-products is achieved through a closed-loop production system.

The invention relates to the technical field of packaging, and discloses an express waterproof bag and a preparation method thereof, the express waterproof bag comprises the following components by mass: 60-70 parts of polylactic acid, 20-30 parts of poly (adipic acid-butylene terephthalate), 5-10 parts of polyhydroxyalkanoate, 2-5 parts of nano cellulose, 1-3 parts of modified montmorillonite, 0.5-1.5 parts of a photosensitizer, 0.25-0.5 part of a bio-enzyme catalyst, and 0.5-1 part of a plasticizer. By combining polylactic acid, poly (butylene adipate-co-terephthalate) and polyhydroxyalkanoate (PHA), the biodegradability is remarkably improved while the mechanical strength of the waterproof bag is maintained, PLA is degraded into carbon dioxide and water through hydrolysis reaction, the degradation rate of PLA is adjusted through PBAT and PHA, premature degradation is avoided, rapid degradation after use is ensured, and the waterproof bag has the advantages of being environmentally friendly and free of pollution. Furthermore, the degradation rate is optimized, the stability and environmental friendliness of the material are balanced, and plastic pollution is avoided.

The invention relates to a microplastic pollution traceability method, system and device and a storage medium, and is applied to the field of water pollution traceability. Cleaning, standardizing and spatially aligning micro-plastic data and then storing; constructing a micro-plastic pollution source space-time diagram, and performing definition reinforcement on the micro-plastic pollution source space-time diagram to obtain a reinforced micro-plastic pollution source space-time diagram; performing space-time dependence modeling on the enhanced micro-plastic pollution source space-time diagram to obtain a dynamic pollution propagation probability diagram, extracting feature vectors of social economic plastic data and micro-plastic multi-modal feature data in the micro-plastic data, and performing fusion to obtain fused multi-modal features; performing model training by fusing the multi-modal features and the dynamic pollution propagation probability graph to obtain a traceability model; and setting a dynamic threshold value and a dynamic risk level, and performing microplastic pollution tracing and pollution alarm according to the dynamic threshold value, the dynamic risk level and the tracing model. The technical effect of the invention is that the microplastic pollution traceability precision is improved.

The invention provides a preparation method and application of a dynamic covalent bond compatibilized thermoplastic blend, and relates to the technical field of high polymer materials, the method comprises the following steps: (1) carrying out melt blending on at least two incompatible or partially compatible thermoplastic polymer blends, a reaction reagent containing acid anhydride or carboxyl groups, an initiator and an auxiliary agent according to a mass ratio of 100: (0.5-12): (0.05-1.5): (0.5-12), carrying out reactive extrusion to obtain a grafted modified material; and (2) carrying out melt blending on the grafted modified material, a cross-linking agent containing an epoxy group or a hydroxyl group and a catalyst according to a mass ratio of 100: (1-20): (0.1-5), and carrying out reactive extrusion to form a dynamic covalent bond network so as to obtain the compatibilization blend. According to the invention, the compatibility and mechanical properties of the thermoplastic blend are improved, and the problems of high recovery cost, complex recovery technology, serious plastic pollution and the like of the waste thermoplastic plastic blend in real life are solved.

The invention discloses an underground water micro-plastic pollution prediction method based on machine learning, and relates to the field of ecological environment, and the method comprises the steps: carrying out the unified grid and standardization processing of global micro-plastic observation data and multi-source environmental factor data; constructing and training a regression model and a classification model to predict a logarithm value of the microplastic concentration and a probability that the logarithm value exceeds a preset threshold value; carrying out feature importance analysis on the regression model and the classification model, and determining master control environment factors influencing micro-plastic pollution; according to the output probability of the classification model, a risk threshold is determined in combination with a diagnostic criterion, and a high-risk area is divided; applying a space mask to the high-risk area; carrying out coupling calculation on the micro-plastic pollution risk probability, population distribution data and underground water dependency data, and evaluating the number of potential exposed population grid by grid; and carrying out uncertainty quantification on the evaluation result of the number of potential exposed population. According to the method, the spatial distribution prediction of underground water micro-plastic pollution is realized.

The invention discloses a wetland system plastic pollution intelligent degradation system based on artificial intelligence driving, and relates to the field of ecological environment protection and artificial intelligence fusion. The problems that an existing wetland system lacks real-time monitoring and predicting capacity for the migration behavior of the micro-plastics, the combination of a microbiological degradation technology and the wetland system is not tight enough, and efficient degradation of the micro-plastics is difficult to achieve are solved. According to the system, an AI behavior path prediction model is adopted to predict a micro-plastic migration track and a micro-plastic distribution probability corresponding to the migration track, a structure optimization subsystem is utilized to optimize wetland structure parameters and filler distribution, and a directional domestication microorganism technology is combined to enhance the degradation capacity. The method is mainly applied to micro-plastic degradation of a wetland system.

The invention belongs to the field of micro-plastic separation, and discloses a device for extracting and separating micro-plastics in forest soil in a fragile region, which comprises a separation box, and a flotation cylinder and a digestion cylinder which are communicated through an overflow assembly are arranged in the separation box; the stone discharging hopper is arranged on the side wall of the separation box, and sediment in the flotation cylinder is conveyed into the stone discharging hopper through a stone discharging assembly arranged in the flotation cylinder. The collection cylinder is communicated with the digestion cylinder through a separation assembly arranged in the digestion cylinder, and plastic particles separated after digestion are conveyed into the collection cylinder through the separation assembly; the feeding hopper is arranged at the top end of the separation box and communicates with an inner cavity of the flotation cylinder, and a screening assembly used for screening soil is arranged on the feeding hopper. The device is compact in structure, convenient to use and high in environmental protection property, micro-plastics can be efficiently extracted and separated from soil in an environment-friendly mode through the steps of flotation, digestion, separation and the like, the application range is wide, effective technical support is provided for soil micro-plastic pollution treatment, and remarkable technical advantages and economic benefits are achieved.

The invention discloses an IsPETase mutant with improved thermal stability and activity and application of the IsPETase mutant. According to the invention, a mutant TS-PETase of PET plastic degrading enzyme IsPETase is taken as a parent, and the IsPETase mutant with improved thermal stability and / or PET degrading activity is obtained by performing single-point mutation or combined mutation on amino acid at a specific site of the mutant TS-PETase. The obtained IsPETase mutant can be used for effectively degrading PET (Polyethylene Terephthalate) plastics under a Tg condition, and can also be prepared into a corresponding preparation for degrading the PET plastics accumulated in the environment and improving the environment polluted by the PET plastics. The obtained IsPETase mutant can also be used for degrading PET-containing plastic products and assisting in harmless treatment of plastics. The IsPETase mutant with improved thermal stability and activity, provided by the invention, has a promoting effect on the development of industrial biodegradation of PET (Polyethylene Terephthalate) plastics.

The invention provides a nano-plastic detection device and method based on a magnetic adsorption-thermal cracking mass spectrometry technology, and solves the technical problem that the variety, content and physicochemical properties of nano-plastic in a water matrix are difficult to rapidly and accurately capture in the prior art. The pyrolysis device comprises a closed heating cavity, a resistance wire is wound on the closed heating cavity, the closed heating cavity is communicated with a carrier gas inlet pipe, a water vapor outlet pipe and a pyrolysis gas outlet pipe, and a sample groove is formed in the closed heating cavity; the sample introduction device comprises a sample introduction pipeline, and the sample introduction pipeline penetrates into the closed heating cavity in a sealed manner and is communicated with the sample groove; the groove bottom of the sample groove is a filter layer, the filter layer comprises a filter membrane layer, the filter membrane layer is connected to a ferromagnetic metal sheet, the aperture of filter holes of the filter membrane layer is smaller than the particle size of the nano-plastic, the heat-resistant temperature of the filter membrane layer is higher than the boiling point of the nano-plastic, and the ferromagnetic metal sheet is provided with a filtrate channel; the suction filtration device comprises a suction filtration head; the suction filtration head is communicated with the sample groove through a filter layer; the method can be widely applied to the technical field of nano-plastic pollution detection.

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 broad-spectrum antibacterial photo-thermal biological film as well as a preparation method and application thereof, and belongs to the technical field of daily chemistry and food science. Keratin and carboxymethyl cellulose are used as raw materials, phenolated lignin nanoparticles are used as an antibacterial agent, and the prepared biological film shows excellent mechanical toughness (elongation at break gt; 150%) and self-adhesion, can form a tight package after simple pressing, has rapid photoresponse ability, can be heated to 50 DEG C or above within 1 minute, has broad-spectrum photothermal antibacterial ability and antioxidant ability, has a staphylococcus aureus and escherichia coli inhibition rate of more than 90%, and has a DPPH free radical scavenging rate gt; and the fresh-keeping period of fresh vegetables and fruits can be effectively prolonged. The prepared biological film can replace a plastic film to be applied to packaging of foods such as vegetables, fruits and grains, loss is reduced while plastic pollution is reduced, and a solution is provided for construction of a sustainable packaging system.

The invention relates to the field of functional materials, in particular to chemical recycling of a series of polyesters represented by PET (Polyethylene Terephthalate) by using a novel and efficient magnesium-based catalyst technology, which is of great significance for treating plastic pollution and realizing green circular economy.

The invention relates to the technical field of wastewater treatment, and particularly discloses a degradation method and application of microplastics in aquaculture wastewater. The degradation method comprises the steps of preparation of the mesoporous structure magnetic immobilized material, pretreatment, adsorption-enzymolysis, microbial degradation, magnetic separation, precipitation and the like. The compound enzyme is efficiently fixed through the shell layer of the mesoporous material and the mesoporous structure, enzyme loss is avoided, and the total microplastic removal rate reaches 94.5% or above in cooperation with targeted degradation of the compound enzyme on PET, PE and PP; the composite thermoduric bacteria relay enzymatic hydrolysate is deeply mineralized, and a staged treatment agent is matched to enhance mass transfer, so that the microbial activity is improved by 3 times; the mesoporous material is protected by a shell layer, the enzyme activity retention rate exceeds 85%, the COD of effluent is smaller than or equal to 50 mg / L, the effluent meets the emission requirement, and the method is suitable for multi-scene micro-plastic pollution treatment and has high efficiency, economical efficiency and environment friendliness.

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 discloses pseudoumen and an application of the pseudoumen in polluted environment treatment. According to the invention, a strain of pseudoumen pseudomonas 25S0261-4 is separated from soil and is gram negative bacillus, the optimal growth temperature of the strain 25S0261-4 is 20-40 DEG C, and the optimal pH range is 5-9. Researches show that the strain 25S0261-4 has a good phosphorus-solubilizing characteristic, and can be used as a phosphorus-solubilizing bacterium for increasing the phosphorus content in soil and improving the soil fertility. The 25S0261-4 strain has an efficient degradation effect on PBAT, the degradation effect of PBAT can be further improved when the 25S0261-4 strain is combined with earthworms for treatment, and it is shown that the earthworms can cooperate with the 25S0261-4 strain to degrade PBAT, be used for treating plastic polluted environments and degrading plastic pollutants in soil and have important significance on improving soil quality and degrading the plastic pollutants.

The invention belongs to the field of biodegradable high polymer materials, and particularly relates to a preparation method of degradable antibacterial plastic and application of the degradable antibacterial plastic in meal boxes. The preparation method comprises the following steps: mixing PLA, PHA, a plasticizer and an antibacterial agent, granulating by an extruder to obtain degradable antibacterial plastic, and then carrying out injection molding to obtain the meal box. The PLA and the PHA are blended, so that the rigidity and the low cost of the PLA are retained, and the flexibility and the rapid degradability of the PHA are fused; pHA has antibacterial activity, and the dosage of extra antibacterial agents is reduced after PHA is blended with PLA; according to the invention, the porous spherical ZnO / TiO2 loaded nano Ag is used as an antibacterial agent, has a relatively high specific surface area and can efficiently sterilize, and the porous material can synchronously adsorb peculiar smell molecules or grease volatilized by food, so that the preservation time is prolonged; the meal box formed by injection molding of the plastic has excellent mechanical properties and food safety, is suitable for the field of disposable environment-friendly tableware, and solves the problems of pollution and microorganism breeding of traditional plastics.

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 provides a nano-plastic detection device and method based on an optical fiber sensing-thermal cracking mass spectrometry technology, and solves the technical problems that the existing nano-plastic detection result is easy to deviate, and the type, particle size and quality of water nano-plastic are difficult to rapidly capture. The pyrolysis device comprises a closed heating cavity, an electromagnetic induction coil is wound on the closed heating cavity, the closed heating cavity is hermetically communicated with a carrier gas inlet pipe, a water vapor outlet pipe and a pyrolysis gas outlet pipe, and a sample tank is arranged in the closed heating cavity; the filter is arranged in the cracked gas outlet pipe; the closed heating cavity comprises a cover body and a base; a filter layer is arranged at the bottom of the sample tank and comprises a filter membrane layer and a metal heating plate, filter holes of the filter membrane layer are smaller than the particle size of the nano-plastic, the heat-resistant temperature of the filter membrane layer is higher than the thermal cracking temperature of the nano-plastic, and the metal heating plate is provided with a filtrate channel; the suction filtration device comprises a suction filtration head; the suction filtration head is communicated with the sample groove through a filter layer; the system further comprises an optical fiber sensing device. The method can be widely applied to the technical field of nano-plastic pollution detection.

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 invention provides a micro-plastic high-flux mass spectrum detection device and method for multi-dimensional characteristic synchronous testing, and relates to the technical field of micro-plastic pollution monitoring, the micro-plastic high-flux mass spectrum detection device comprises a rapid image acquisition and analysis module, a gas circuit transmission module, an electromagnetic thermal cracking module, a filtration and purification module, a mass spectrum detection module and a data analysis module, the gas circuit transmission module, the electromagnetic thermal cracking module, the filtration and purification module and the mass spectrometry detection module are sequentially communicated through quartz pipelines, the rapid image acquisition and analysis module is arranged right above the electromagnetic thermal cracking module and is separated by a visible window, a window shielding gas purging opening is formed below the visible window, and the electromagnetic thermal cracking module is connected with a shunt sucking pump. According to the invention, four-dimensional information of particle size, quantity, variety and quality of the micro-plastic in the sample is synchronously obtained, the accuracy of multi-dimensional information acquisition of the micro-plastic can be improved, conversion between quality and quantity of the micro-plastic is completed, and the problems that a window of a rapid image acquisition and analysis module is polluted and a microscope lens is not resistant to high temperature are solved through gas purging.

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 belongs to the technical field of high-value utilization of waste plastics and preparation of lubricating oil. According to the method for preparing the lubricating oil through hydrogenolysis of the polypropylene waste plastics, a supported non-noble metal-metal oxide catalyst is adopted to catalyze hydrogenolysis of the polypropylene waste plastics to prepare the lubricating oil in the absence of a solvent. According to the method disclosed by the invention, the polypropylene waste plastic can be converted into the high-value lubricating oil under low-cost and mild conditions, the problem of waste plastic pollution can be solved, and meanwhile, green and multi-way preparation of the lubricating oil can be realized.

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 belongs to the technical field of rice planting, and particularly relates to a rice planting method for reducing soil microplastic pollution. By applying the soil conditioner, the pea crop rotation, the compost treatment and the specific irrigation strategy, the soil micro-plastic pollution can be effectively reduced; the pea plants can enrich micro-plastic particles in the soil through root exudates and self metabolic activities to a certain extent, and the pea plants are subsequently composted, so that the micro-plastic particles enriched in the pea plants can be further degraded; biochar in the soil conditioner can adsorb micro-plastic particles, the free state of the micro-plastic particles in soil is reduced, and the phanerochaete chrysosporium, the rhodococcus fence celebrating and the trichoderma harzianum can synergistically degrade the micro-plastic particles; the dry-wet alternate cycle treatment can further reduce the absorption of the rice plants to the micro-plastics, can promote the development of rice roots and the absorption of nutrients, and improves the stress resistance of the rice.