538 results about "Organic phosphorus" patented technology

The invention belongs to the technical field of soil fertilizers, and particularly relates to a soil conditioner and a preparation method thereof. Wherein the soil conditioner is prepared from the following raw materials in parts by weight: 30 to 40 parts of modified charcoal, 20 to 30 parts of microbial complexing agent, 15 to 25 parts of humic acid and 1 to 5 parts of biological enzyme; according to the microbial complexing agent, dopamine grafted and modified nano silicon dioxide and hydroxyapatite form a composite shell, pseudomonas aeruginosa and bacillus subtilis are wrapped, and the microbial complexing agent has the functions of protecting microorganisms, adsorbing heavy metals and slowly releasing phosphorus elements; the modified biochar is compounded with the attapulgite through acid-base treatment to form a porous structure with physical inlaying and chemical functional groups synergistic, so that the adsorption and fixation capability on heavy metals and organic pollutants is remarkably improved; the biological enzyme accelerates organic phosphorus conversion, and enzymatic hydrolysate provides a phosphorus source for microorganisms, promotes microorganism breeding, effectively increases the content of available phosphorus in soil, and enhances the stability of a remediation system.

The invention discloses a copper-based nano-enzyme, a preparation method thereof and application of the copper-based nano-enzyme in organophosphorus pesticide detection, and belongs to the technical field of pesticide residue detection. The copper-based nano-enzyme has a netted-like structure, a high specific surface area and many active sites, the valence state of a copper element is zero-valence Cu, Cu < + > and Cu < 2 + >, the copper-based nano-enzyme has high peroxidase-like activity and laccase-like activity, the detection limit is low, and glyphosate can be sensitively detected; and glyphosate, glufosinate-ammonium and isazofos can be well distinguished from six organophosphorus pesticides with medium concentration, and the method has high selectivity. The nano enzyme provided by the invention is prepared from ammonium citrate and copper nitrate in an N, N-dimethylformamide (DMF) solution by using a solvothermal method; the preparation process of the nano enzyme is simple.

The invention discloses a charcoal nano lanthanum material capable of synchronously removing organic phosphorus and inorganic phosphorus, and belongs to the field of environmental functional materials. The adsorbent comprises biochar and nano lanthanum loaded on the biochar, wherein the biochar is bamboo biochar; the nano lanthanum is in a La (OH) 3 form, the particle size of the nano lanthanum is 1-250nm, and the loading capacity of the nano lanthanum is 3-20wt%; the pore diameter of the biochar nano lanthanum material is 1-30nm, and the specific surface area is 100-250m < 2 > / g. Compared with a biochar-loaded nano lanthanum composite material in the prior art, the composite material has the inorganic phosphorus adsorption performance and also has the organic phosphorus adsorption effect, and inorganic phosphorus and organic phosphorus can be synchronously removed. According to the charcoal nano lanthanum material, organic phosphorus is adsorbed and removed by regulating and controlling the defect form of lanthanum, especially organic phosphonate can be hydrolyzed and removed, meanwhile, large pore channels of bamboo charcoal are beneficial to diffusion of macromolecular organic phosphorus to action sites of lanthanum, and the adsorption and hydrolysis effects of lanthanum on the organic phosphorus are further enhanced.

The invention provides a method for degrading organic phosphorus and recycling phosphorus in water in an ozone oxidation system. According to the method, a mode of adding iron or iron salt solution step by step is innovatively adopted, so that the degradation rate of phosphorus-containing organic matters in water, the generation rate of phosphate radicals and the removal of total phosphorus in water are remarkably improved. Besides, the treatment effect is evaluated by monitoring the organophosphorus mineralization rate (taking the generation amount of phosphate radicals as an index) and the removal rate of total phosphorus in water, experiments show that the method can increase the organophosphorus mineralization rate by 30% or above, and the removal rate of total phosphorus reaches 95%. Compared with the conventional one-time addition of iron or iron salt, the method has the advantages that the mineralization rate of organophosphorus and the removal rate of total phosphorus are effectively improved through a step-by-step addition strategy, the direct precipitation of an organophosphorus intermediate product is promoted, the use amount of ozone and the addition amount of iron are remarkably reduced, the reaction time is greatly shortened, and the recovery efficiency of phosphorus resources is further improved. The method is low in cost and suitable for advanced treatment of organic phosphorus-containing wastewater in the industries of pesticides, electroplating and the like.

The invention discloses a Brucella with antibacterial activity and application of the Brucella. The invention discloses Burkholderia sp.HNIV0701, and the preservation number of the Burkholderia sp.HNIV0701 is GDMCC No: 66007. The Burkholderia sp.HNIV0701 disclosed by the invention has a stable, efficient and broad-spectrum antibacterial property, has an inhibition effect on a plurality of plant pathogenic bacteria such as Botryosphaeria dothidea, Phytophthora nicotianae, Fusarium solani, Alternaria alternata, Thanatepora cucurbitae, Ralstonia solanacearum and the like, and also can be used for inhibiting Staphylococcus aureus and / or Listeria monocytogenes, so that the Burkholderia sp.HNIV0701 can be used for inhibiting a plurality of plant pathogenic bacteria such as the Botryosphaeria dothidea, the Phytophthora nicotianae, the Fusarium solanum, the Alternaria solanacearum and the like. The Brucella HNIV0701 can hydrolyze organic phosphorus and can be used for soil improvement. The Brucella HNIV0701 has nitrogen fixation capability and has the potential of promoting plant growth.

The invention discloses a sphingomonas sphingomonas, a bacterial agent thereof and application of the sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas sphingomonas The sphingomonas disclosed by the invention has excellent saline-alkaline tolerance, has the functions of fixing nitrogen, decomposing organic phosphorus and producing ACC deaminase, breaks through the limitation of single function of a traditional strain, and has a very good application prospect in saline-alkaline soil improvement, plant growth promotion and ecological restoration.

The invention discloses a sporosarcina sp. Strain RH34 and an application of the sporosarcina sp. Strain RH34 and the application of the sporosarcina sp. Strain RH34. The sporosarcina strain RH34 is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation address is No.3, yard 1, Beichen West Road, Chaoyang District, Beijing, the preservation date is December 25, 2024, and the preservation number is CGMCC NO.33199. The sporosarcina strain RH34 can be used for preparing the sporosarcina strain RH34. The alfalfa rhizosphere microorganism sporosarcina strain RH34 is separated from alfalfa roots in salinized soil, and has the functions of dissolving organic phosphorus, dissolving inorganic phosphorus, producing biological membranes, producing siderophores, producing IAA and producing ACC deaminase. Seed soaking and germination under salt stress can obviously improve the germination index of alfalfa seeds. The growth condition of alfalfa seedlings can be improved under salt stress.

The invention provides an organophosphorus mineralization composite flora with wide pH (potential of hydrogen) adaptability and application of the organophosphorus mineralization composite flora. The organophosphorus mineralization composite flora comprises subterranean bacillus subterraneus, stenotrophomonas sp and Cupriavidus sp. The organophosphorus mineralization composite flora has the advantages that the organophosphorus mineralization composite flora has wide pH adaptability, and the organophosphorus mineralization composite flora comprises the subterranean bacillus subterraneus, the stenotrophomonas sp. And the Cupriavidus sp. The organophosphorus mineralization composite flora provided by the invention can be widely used in acid-base environments; wherein the capacity of the phosphatase secreted by the three bacteria is not interfered by the external phosphorus concentration, and the phosphatase is constitutive phosphatase, so that a large amount of phosphatase can be secreted no matter which phosphorus concentration is high or low. The organophosphorus mineralization composite flora remarkably promotes mineralization of organophosphorus and release of phosphorus in the organic fertilizer, improves the nutrient efficiency of the organic fertilizer, and can play a role in mineralizing organophosphorus in both acid soil and alkaline soil.

The invention relates to the technical field of environmental microorganisms, in particular to arthrobacterium Arth.R8 and application thereof, and the preservation number of the arthrobacterium Arth.R8 is GDMCC No.63567. The arthrobacter Arth.R8 has the effects of fixing nitrogen, dissolving organic phosphorus, promoting growth and promoting nodulation. The arthrobacter Arth.R8 disclosed by the invention can be used for promoting absorption and utilization of nutrient substances such as nitrogen and phosphorus in a plant growth process, inhibiting growth of fusarium graminearum and promoting plant growth, and a new microbial strain resource is provided for realizing reduction and synergism of chemical fertilizers in agricultural production.

The invention relates to the technical field of ecological agriculture, and discloses a phytase fungicide fertilizer as well as a production method and application thereof. 1-10 parts of a phytase high expression strain; 1-8 parts of a phytase solution; 1.7 to 9 parts of an embedding material; 3-8 parts of pH buffer particles; 10-30 parts of a micro-carbon carrier; 0.02 to 0.10 part of an indoleacetic acid microcapsule; and 30-60 parts of humus powder. The invention further provides a production method of the phytase fungicide fertilizer. The method comprises the following steps: S1, performing liquid fermentation on a phytase high-expression strain; s2, mixing the thalli with an enzyme solution; s3, adding pH buffer particles into the embedded particles; s4, drying the granules in a spray drying manner; and S5, mixing the dried product with humus powder, and granulating. By constructing a microbial inoculum system containing a phytase high-expression strain, efficient activation and conversion of organic phosphorus resources are realized, and the release efficiency of the fertilizer to phosphorus resources is improved.

The invention discloses bacillus for preventing and treating anthracnose of camellia oleifera and application of the bacillus. The preservation number of the bacillus CH-1-7 provided by the invention is GDMCC (Glucose Digital Microorganism Center) No. 66219; the bacillus amyloliquefaciens has the capability of generating living-promoting substances, can generate organic phosphorus and siderophores, has the nitrogen fixation capability, can inhibit the growth of various pathogenic bacteria, especially colletotrichum gloeosporioides, can be used for preventing and treating camellia oleifera anthracnose, and has important application value in the field of plant protection.

The invention relates to the technical field of PU synthetic leather, and discloses flame-retardant PU synthetic leather, which comprises a base layer, a flame-retardant middle layer and a surface functional layer, the flame-retardant middle layer is prepared by mixing modified PU resin, a composite flame retardant, a synergist and a cross-linking agent, the composite flame retardant is prepared by compounding an organic phosphorus-nitrogen flame retardant and nano magnesium hydroxide according to a mass ratio of 3: 1-5: 1, and the surface functional layer is prepared by mixing modified PU resin, a composite flame retardant, a synergist and a cross-linking agent. The synergist is modified montmorillonite, the surface functional layer is a blend of fluorine-containing polyurethane resin and flame-retardant silicone oil, and the three-layer structure is integrally formed through a hot melting compounding process. The modified PU resin is prepared from polycarbonate diol, isophorone diisocyanate and a chain extender through a reaction. Three-dimensional flame-retardant protection from inside to outside can be achieved through the collaborative design of the base layer flame-retardant pretreatment layer, the flame-retardant middle layer and the surface functional layer, a finished product can reach a high flame-retardant grade, combustion spreading is effectively inhibited, release of smoke and toxic gas is reduced, and the problems that traditional PU synthetic leather is poor in flame retardance and prone to melting and dripping are solved.

The invention relates to the technical field of cables, in particular to an aluminum alloy cable which is composed of an aluminum alloy conductor, an inner insulating layer, a fireproof wrapping tape layer and an outer sheath. The outer sheath is prepared from the following raw materials in parts by weight: 50 to 60 parts of ethylene-vinyl acetate copolymer, 20 to 30 parts of linear low density polyethylene, 10 to 20 parts of polyolefin elastomer, 5 to 10 parts of PPO-g-MAH, 20 to 30 parts of carbon black, 1 to 10 parts of organic phosphorus flame retardant, 20 to 30 parts of crusting agent and 1 to 3 parts of antioxidant; the aluminum alloy cable provided by the invention is light in weight, high in strength and excellent in fireproof and flame-retardant performance.

The invention discloses an imidazole derivative-organic phosphoric acid combined extracting agent and an application method thereof, and belongs to the technical field of hydrometallurgy. The molar ratio of the imidazole derivative to the organic phosphoric acid is (10: 1)-(1: 10). The combined extraction agent can be used for extracting nickel, cobalt and manganese from a solution containing one or more nickel, cobalt and manganese. The selectivity of the solvent extraction system to nickel, cobalt and manganese is far higher than that of impurity metal ions such as calcium, magnesium, lithium, sodium and potassium, the extraction system is good in stability, free of emulsification phenomenon and third phase generation, easy to operate, low in cost and environmentally friendly. In lithium battery recovery and other systems containing coexistence of nickel, cobalt, manganese and calcium, magnesium and lithium, the solvent extraction system is particularly good in selectivity, and efficient co-extraction of nickel, cobalt and manganese can be achieved. When a mixed solution and a weak acid solution are treated, purification and concentration of target metal can be synchronously achieved, the recovery period is greatly shortened, the recovery rate is increased, and the method has great significance in efficient utilization of nickel-cobalt-manganese resources.

The present invention belongs to the technical field of anti-corrosion coatings, and discloses an organophosphorus-modified epoxy acrylic resin composite coating and a preparation method thereof. The present invention adopts a phosphorus oxide containing a benzene ring as a reactive group, and realizes the modification of acrylate by grafting an acrylate monomer through the ortho-C-H bond on the activated benzene ring. At the same time, the selected phosphorus oxide can also be connected with layered vermiculite and boron nitride through a covalent bond, which is beneficial to improve the dispersibility of inorganic fillers in the coating, avoid the occurrence of local agglomeration, and strengthen the compactness of the epoxy acrylic resin composite coating. In addition, the introduced organophosphorus compound can also undergo a strong chelating effect with the substrate, and form a stable metal salt passivation film through covalent bond and metal complexation to prevent the erosion of the medium, thereby further improving the salt resistance of the substrate. The modified water-based acrylic resin composite coating prepared by the present invention is green and environmentally friendly, has excellent salt spray resistance and chemical corrosion resistance, and can be widely used in the field of metal corrosion protection.

The invention relates to a streptomyces sp. Strain EC15 and an application of the streptomyces sp. Strain EC15. The streptomyces strain EC15 is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation address is No.3, yard 1, Beichen West Road, Chaoyang District, Beijing, the preservation date is December 25, 2024, and the preservation number is CGMCC NO.33195. The streptomyces strain EC15 has the advantages that the streptomyces strain EC15 can be used for preparing the streptomyces strain EC15; the strain has the functions of dissolving organic phosphorus, dissolving inorganic phosphorus, producing a biological membrane, producing an iron carrier, producing IAA and producing ACC deaminase. The EC15 bacterial liquid is used for soaking seeds under the stress of 200 mmol / L and 250 mmol / L NaCl, so that the germination potential, the germination rate, the germination index, the radicle length, the germ length and the fresh weight of group seedlings of the alfalfa seeds can be obviously improved. After the EC15 strain is inoculated, under the stress of 200 mmol / L NaCl, the plant height, stem diameter, leaf area and overground part fresh and dry weight of alfalfa plants can be obviously improved.

The invention relates to the technical field of wastewater treatment and resource recovery, and discloses an organophosphorus degradation and recovery system based on double-cathode electro-Fenton reaction, comprising: an electrolytic tank for accommodating organophosphorus wastewater to be treated; the anode is arranged in the electrolytic tank and is electrically connected with an anode of a power supply; the oxidizing agent generating cathode is arranged in the electrolytic tank and is used for generating hydrogen peroxide in situ under a power-on condition; the metal reduction cathode is arranged in the electrolytic tank and is used for adsorbing and reducing ferric ions; the metal source is composed of zero-valent iron or iron alloy, is not directly and electrically connected with the power source, and is arranged in an electric field acting area established by the anode and the at least one cathode. Through the design of inductive slow-release iron supply and double-cathode collaborative circulation, a series of problems of uncontrollable iron ion release, high iron sludge yield, low catalyst utilization efficiency, difficulty in resource recovery and the like in the traditional electro-Fenton technology are effectively solved.

A preparation method for iron phosphate with a core-shell structure and the use thereof. The method comprises: mixing a surfactant, an organic iron source, an organic phosphorus source, a waste oil coagulant and liquid oil at 60-90°C, adding the obtained mixed liquid to water to form an emulsion, separately adding a trivalent iron salt solution and a phosphate solution to the emulsion for a reaction, naturally cooling and filtering the reaction solution, and subjecting the obtained wet solid material to microwave heating in an oxygen atmosphere, so as to obtain iron phosphate with a core-shell structure.

The invention discloses a hindered phenol monomer containing organic phosphorus heterocyclic rings as well as a preparation method and application of the hindered phenol monomer. The hindered phenol monomer has any one of the following structures: R is selected from-(CH2) b-or an aromatic ring, b is 3 or 4, and the aromatic ring comprises a benzene ring and / or a furan ring. The intrinsic flame-retardant anti-droplet polymer provided by the invention has the characteristics of excellent flame retardance and no droplet, and meanwhile, the intrinsic flame retardant is copolymerized into a molecular chain, so that the intrinsic flame-retardant anti-droplet polymer is not easy to migrate, does not permeate into the surrounding environment, is stable in property, can be used for injection molding and spinning, and can be used for preparing flame-retardant blocky products and fabrics; the composite material is used for interiors of electric appliances, switches, firefighter uniform, military uniform, automobiles, high-speed rails and other limited spaces.

The invention discloses pseudomonas capable of dissolving phosphorus and producing siderophores and application of the pseudomonas, and relates to the technical field of microorganisms. The bacterial strain P-14-21 is identified as a new species of Pseudomonas sp. And is named as Pseudomonas sp. P-14-21, the bacterial strain is preserved in Guangdong Microbial Culture Collection Center on August 7, 2024, and the preservation number is GDMCC No: 64969. The invention also discloses a preparation method of the Pseudomonas sp. P-14-21, and the bacterial strain is named as Pseudomonas sp. P-14-21. The bacterial strain is named as Pseudomonas sp. P-14-21 and is preserved in Guangdong Microbial Culture Collection Center on August 7, 2024. Besides, the pseudomonas P-14-21 disclosed by the invention has the capacity of dissolving organic phosphorus and high-yield siderophore, the phosphorus dissolving index can reach 2.4, and the activity unit (su) of the siderophore can reach 94.41%, so that the strain has excellent development and application values in agricultural production.

The invention relates to the technical field of fire extinguishing agents, and particularly discloses a lithium battery fire extinguishing agent and a preparation method thereof. The degradable surfactant is selected from at least one of alkyl glycoside and fatty acid methyl ester sulfonate; the particle size of the nanoscale silicon dioxide particles is 10 to 100 nm; the composite flame retardant is formed by compounding an organic phosphorus compound and graphene oxide according to a mass ratio of 1: (0.5-2); the antifreeze agent is selected from at least one of ethylene glycol and propylene glycol; the thickening agent is selected from at least one of xanthan gum and sodium carboxymethyl cellulose; the preservative is selected from at least one of sodium benzoate and potassium sorbate; through the synergistic effect of the composite flame retardant, the fire extinguishing efficiency is remarkably improved, reburning is inhibited, in addition, nano silicon dioxide is uniformly dispersed after being subjected to surface modification to form a compact heat insulation layer, the degradable surfactant and the environment-friendly preservative are combined, and the agent is free of toxic residues.

The invention belongs to the technical field of coal chemical industry grey water treatment, and particularly relates to an advanced treatment method and system for coal chemical industry grey water circulating water. The method integrates pretreatment, complexing cracking, fractional crystallization and deep deamination, and is characterized in that a chelating structure of an organic phosphorus dispersing agent and calcium and magnesium ions is thoroughly destroyed through an advanced reduction-advanced oxidation combined process, target ions are released, and the core problems that hardness removal is hindered and phosphorus pollution is caused are solved; then, calcium and magnesium are respectively converted into calcium carbonate and magnesium ammonium phosphate particles for resource recovery by utilizing a secondary crystallization technology, so that the bottlenecks of high alkali liquor consumption and salt accumulation of a traditional high-pH magnesium ion precipitation method are broken through; and finally, the residual ammonia nitrogen is deeply removed by adopting a pollution-resistant PTFE hydrophobic membrane, so that the residual ammonia nitrogen is efficiently and stably removed, and the problem that a traditional polypropylene material membrane system is easy to pollute and block, easy to oxidize and difficult to apply to the field is solved.

The invention discloses a composite flame retardant, a flame-retardant ABS (Acrylonitrile Butadiene Styrene) composition as well as a preparation method and application thereof. The composite flame retardant is prepared from the following raw materials in parts by weight: 30-60 parts of an organic phosphorus chelating agent, 10-25 parts of soluble rare earth inorganic salt and 150-200 parts of zeolite. The preparation method of the composite flame retardant comprises the following steps: A) dispersing zeolite and alkali metal hydroxide in water to form a dispersion liquid I; b) dispersing soluble rare earth inorganic salt in the dispersion liquid I to form dispersion liquid II; and C) adding an organophosphorus chelating agent into the dispersion liquid II, and carrying out a heating reaction at 80-95 DEG C to prepare the composite flame retardant. The composite flame retardant provided by the invention can significantly improve the flame retardance, smoke suppression and mechanical properties of ABS resin.

The invention discloses a corrosion and scale inhibitor for oil and gas wells and a preparation method thereof, and relates to the technical field of environment-friendly materials, the corrosion and scale inhibitor is prepared by compounding an imidazoline polyoxyethylene ether corrosion inhibitor, a quaternary ammonium salt corrosion inhibitor capsule and an organic phosphoric acid corrosion inhibitor; the quaternary ammonium salt corrosion inhibitor capsule is prepared by taking a quaternary ammonium salt corrosion inhibitor as a core and a dispersing agent as a wall. According to the invention, the imidazoline polyoxyethylene ether corrosion inhibitor, the quaternary ammonium salt corrosion inhibitor capsule and the organic phosphoric acid corrosion inhibitor are compounded, so that the corrosion inhibition and the long-term effect on pipelines in oil and gas wells are improved, the use amount of the corrosion and scale inhibitor is reduced, meanwhile, the deposition of inorganic sediments such as calcium carbonate on the pipelines in the oil and gas wells is reduced, and the scale inhibition is improved.

The invention discloses a low-carbon sludge phosphorus recovery process based on an earthworm compost and struvite precipitation method, which reduces the construction and operation cost through earthworm compost, simplifies the operation technology, reduces the overall carbon emission of the sludge phosphorus recovery process, and can feed earthworms while synchronously recovering nitrogen and phosphorus in sludge. The conversion efficiency of organophosphorus is improved through earthworms and microorganisms, development of the earthworms is promoted through rich organic matter in the sludge, the recovery cost can be compensated after recovery, the synthesized struvite can be used as a soil fertilizer, and high-value utilization of the sludge is achieved.

The present invention relates to a strain of Paenibacillus polymyxa with disease prevention, stress resistance and growth promotion and its application, belonging to the field of microbial technology. The Paenibacillus polymyxa SS44 has the characteristics of degrading protein, degrading fat, degrading cellulose, releasing potassium, fixing nitrogen, decomposing organic phosphorus, dissolving inorganic phosphorus and producing extracellular polysaccharide. It can antagonize the pathogenic fungi Fusarium oxysporum and Fusarium fujikuroi that can cause potato wilt, sweet potato root rot, soybean root rot, alfalfa root rot, etc. Moreover, this strain can improve sandy soil and has a good growth promotion effect on wheat, soybean and corn in saline-alkali soil and sandy barren soil environments, with very broad application prospects.

The invention discloses an organophosphorus degradation and synchronous recovery system based on a double-cathode induced electro-Fenton reaction. An induced iron electrode plate and an electrochemical assembly with double cathode plates are arranged in an electrolytic tank; the double cathode plates are a gas diffusion cathode plate and an iron reduction cathode plate; the gas diffusion cathode is used for reducing oxygen to generate hydrogen peroxide, the induction iron electrode releases ferrous ions under the action of an electric field, the ferrous ions and the hydrogen peroxide are subjected to a Fenton reaction, organic phosphorus is degraded into PO4 < 3->, Fenton reaction by-products Fe < 3 + > and PO4 < 3-> form iron phosphorus precipitates, and degradation of the organic phosphorus and synchronous recovery of orthophosphate are realized; excessive Fe < 3 + > is adsorbed by the iron reduction cathode and is further reduced into Fe < 2 + > which enters the solution again to participate in the Fenton reaction, so that the reaction efficiency is improved, and Fe < 3 + > / Fe < 2 + > circulation is promoted while slow release of iron is realized. The device is simple in structure, low in maintenance cost and high in operability, and the purpose of efficiently recycling phosphorus resources is achieved.

The invention provides a method for enhancing the flame retardant property of a bio-based composite material, and belongs to the technical field of bio-based composites.The method comprises the steps that wood fibers are pretreated through a sodium hydroxide solution to increase hydroxyl active sites, and a silane coupling agent KH550 is adopted for surface modification to form covalent bond connection; the preparation method comprises the following steps: preparing a nano aluminum oxide and layered double hydroxide compounded nano flame-retardant synergistic system, adding a reaction type phosphorus-nitrogen flame retardant DOPO-HQ in a polyethylene melt blending process to carry out an in-situ polymerization reaction, determining optimal reaction condition parameters by using a greywolf hunting optimization algorithm, and preparing the flame-retardant composite material through compression molding and post-heat treatment processes. A flame retardant-fiber-matrix three-dimensional chemical bonding network is constructed, molecular-level compatibility improvement and uniform dispersion are achieved, and the technical problem that the compatibility of an organic phosphorus flame retardant and wood fibers is poor is solved.

The invention discloses a flame-retardant PA66 material and a preparation method thereof.The flame-retardant PA66 material is prepared from, by weight, 80-100 parts of a modified PA66 material, 3-5 parts of modified graphene, 15-30 parts of a flame-retardant additive and 0.1-0.5 part of tetraphenylphosphorus bromide, a molecular chain of the flame-retardant additive contains an organic silicon chain segment and an organic phosphorus structure and is doped with nitrogen and boron elements, and when the material is burnt, the flame-retardant PA66 material has a flame-retardant effect, and the flame-retardant PA66 material has a flame-retardant effect. The organic phosphorus can be dehydrated to form a phosphoric acid carbon layer, the nitrogen element can release inert gas, dilute combustible gas and generate an expansive phosphorus-nitrogen carbon layer with the organic phosphorus, the boron element can improve the compactness and high-temperature stability of the carbon layer, and the organic silicon can form a cross-linked network shape, so that the continuity of the carbon layer is improved; a fluorine-containing polysiloxane chain segment of a side chain of the flame-retardant additive is embedded among molecules of the modified PA66 material, and is decomposed to generate fluorine free radicals during combustion, and active free radicals in a combustion chain reaction are quenched, so that a rapid flame-retardant effect is achieved.

The invention provides a strain of Ralstonia sp. YNK-FB0054 as well as a microbial agent and application thereof, and belongs to the technical field of biology, the strain is Ralstonia wenshanensis, and the preservation number of the strain is CCTCC NO: M 2025293. The strain provided by the invention has the functions of dissolving zinc, fixing nitrogen, decomposing organic phosphorus, dissolving inorganic phosphorus, producing iron carriers and producing indoleacetic acid. The strain and the fungicide taking the strain as the effective active component can promote the germination of plant seeds and the growth of plants, and have high application value.