33results about How to "Toxic reduction" patented technology

The invention discloses a saline-alkaline tolerant strain as well as a culture method and application thereof, and relates to the technical field of agricultural biology. Comprising the following steps: S1, screening and culturing strains; s11, carrying out salt tolerance detection on primary strains stored in a laboratory, then carrying out first screening, and screening out strains with OD600 values greater than 1.0 as candidate strains; s12, inoculating the candidate strains into a culture medium, carrying out secondary screening, and screening out strains with the OD600 value greater than 1.0 as saline-alkaline tolerant strains; and S13, inoculating the saline-alkaline tolerant strain into the EPS-producing strain fermentation medium. The application of the saline-alkaline tolerant strain provided by the invention can obviously improve the yield and quality of crops; experiments show that after the HB-02 strain is inoculated, the prevention and treatment effect on wheat root rot reaches 80.2%, the yield of wheat in saline-alkali soil is increased to 703.13 g / m < 2 > from 516.61 g / m < 2 >, the yield is increased by 36.10%, and good disease prevention and growth promotion effects are shown.

According to the method disclosed by the invention, arbuscular mycorrhizal fungi and biochar are added while multiple-leaf goldenrain trees are planted in cadmium-polluted soil. Compared with a traditional remediation mode of independently utilizing plants or microorganisms or biochar, the microorganism-plant-biochar combined remediation has the advantages that the plants, the microorganisms and the biochar are co-cultured to form a symbiotic system, so that the cadmium content in the soil is remarkably reduced, the remediation capacity of the plants is enhanced, and meanwhile, the growth of the plants is remarkably improved. The strategy breaks through the limitation that in the prior art, only improvement of plant resistance is concerned, and the strategy more focuses on the double effects of improving the phytoremediation capacity and promoting the growth effect, so that the maximization of the phytoremediation effect is achieved.

The invention belongs to the technical field of agricultural fertilizers, and provides a soil remediation fertilizer and a preparation method thereof. The preparation method comprises the following steps: S1, sequentially drying and crushing a natural organic matter material to obtain a pretreated natural organic matter material; s2, mixing the pretreated natural organic matter material, microbial flora, a plant growth regulator, a stabilizer and a slow release agent, and performing fermentation treatment to obtain a compound fertilizer; s3, sequentially drying, granulating and packaging the compound fertilizer to obtain the soil remediation fertilizer. The soil remediation fertilizer provided by the invention can effectively solve the remediation problem of organic matter and heavy metal contaminated soil, improve the soil quality and promote plant growth, and has remarkable environmental protection and agricultural sustainable development benefits.

The invention discloses a magnetic biochar-based saline-alkali soil conditioner as well as a preparation method and application thereof, after a biochar material is loaded on ferrous iron, the biochar material is subjected to alkaline oxidation to obtain ferroferric oxide and a porous biochar material in a stable state, and finally activated humic acid, betaine, trehalose and melatonin are combined with magnetic biochar. The magnetic charcoal-based saline-alkali soil conditioner is low in price and easy to obtain and has a good improvement effect on physicochemical properties of saline-alkali soil and promotion of rice growth, and the preparation process is simple and easy to operate.

The invention discloses a special growth-promoting microbial fertilizer for saline-alkali soil and a preparation method of the special growth-promoting microbial fertilizer, and belongs to the technical field of growth-promoting microbial fertilizer.The special growth-promoting microbial fertilizer for saline-alkali soil is obtained by mixing organic manure, ammonium humate, fungicide particles, crop straw, slow-release phosphate fertilizer particles, hydroxyapatite, chitosan and citric acid in proportion; according to the granular microbial inoculum carrier, the biochar particles and the iron-carbon composite microspheres serve as matrixes, the raw materials such as the fly ash form a foaming porous adhesive substance under the action of alkali excitation, the matrixes such as the biochar particles are bonded, a stable porous structure can be formed easily, a proper environment is provided for growth of phosphate solubilizing bacteria, and the phosphate solubilizing and growth promoting effects of the phosphate solubilizing bacteria are improved. The microbial agent particles have good water absorption and can adsorb sodium ions in soil after being watered, and calcium and magnesium components contained in the fly ash-based adhesive substance can be exchanged with the sodium ions to play a fixing role, so that the salt stress effect on crops is reduced.

The invention discloses a biological filler for enhancing denitrification of an aerobic tank as well as preparation and application of the biological filler, the problem of weak activity of denitrifying bacteria is successfully solved by loading three layers of biological fillers, namely an inner layer-denitrifying bacteria, a middle layer-conducting layer and an outer layer-nitrifying bacteria, on the filler, and rapid formation of a biological membrane is realized. In addition, a metal conducting layer is additionally arranged in the middle to participate in electron transfer in the microbial denitrification process, and the biological membrane layers on the two sides achieve rapid formation of biological membranes so as to achieve conversion and removal of nitrogen. According to the method, the biological activity of the thalli can be kept, the rapid formation of a biological membrane is realized, and the separation of the thalli and refractory organic matters can be promoted, so that the toxic action on the thalli is reduced.

The invention discloses a manufacturing method of a second type low-smoke halogen-free standard wall cable of a motor train unit, which relates to the technical field of cables and comprises the steps of conductor preparation, insulation extrusion, buffer isolation layer forming, shielding layer manufacturing, reinforced core preparation and installation, sheath extrusion and post-processing. The conductor is prepared by layering and twisting cerium-titanium alloying copper monofilaments and treating the cerium-titanium alloying copper monofilaments through a nano ceramic coating; post-processing detection shows that the cable is small in bending radius, low in electrical and mechanical performance attenuation rate after repeated bending, excellent in electrical performance, mechanical performance, fireproof performance, environmental protection performance and the like, capable of effectively meeting the cable use requirements under complex working conditions of the motor train unit, capable of guaranteeing the operation reliability and safety, capable of improving the comprehensive performance of the cable and wide in application range. The cable is suitable for power and signal transmission in rail transit fields such as motor train units.

The invention discloses recombinant escherichia coli and a method for producing L-methionine by using the recombinant escherichia coli. L-methionine is produced through fermentation culture of recombinant escherichia coli, sulfur source optimization is carried out on a sulfur source culture medium used during fermentation culture, the sulfur source utilization efficiency is improved, and the yield of L-methionine is increased; in the optimization process, generation of hydrogen sulfide in a culture medium is detected by lead acetate test paper, so that metZ genes for expressing and coding O-succinyl homoserine sulfhydrylase are introduced into plasmid pAm to obtain plasmid pAmZ, and the plasmid pAmZ is introduced into strains M2 / pAm and M2-HPBC / pAm to obtain recombinant escherichia coli M2 / pAmZ and M2-HPBC / pAmZ, so that the toxic action of hydrogen sulfide on cells is reduced, and the yield of hydrogen sulfide is increased. The yield of the L-methionine can be increased; according to the present invention, the recombinant escherichia coli M2 / pAmZK and the recombinant escherichia coli M2-HPBC / pAmZK are obtained by further introducing the ppnk gene expressing and coding NAD + kinase into the plasmid pAmZ, and introducing the ppnk gene into the bacterial strains M2 / pAmZ and M2-HPBC / pAmZ to obtain the recombinant escherichia coli M2 / pAmZK and M2-HPBC / pAmZK, such that the intracellular NADPH level is improved, and the L-methionine yield is further improved;

The invention provides a preparation method of a metal organic coordination polymer mediated silver nanowire. The preparation method comprises the following steps: respectively preparing a supramolecular assembly agent, a high-molecular polymer protective agent, halide salt and a soluble silver salt solution; the supramolecular assembly agent is at least one of cinnamic acid, p-coumaric acid, caffeic acid, tannin and the like; halide salt and a supramolecular assembly agent are sequentially added into the soluble silver salt solution to form a silver ion-supramolecular assembly agent coordination polymer solution; adding a high-molecular polymer protective agent into the silver ion-supramolecular assembly agent coordination polymer solution, stirring, and reacting in a dark place at-20 to 80 DEG C for 0.1 to 10 hours; and after the reaction is completed, centrifuging, washing, drying in vacuum and re-dispersing to obtain the silver nanowire. According to the technical scheme, the prepared silver nanowire is superfine in diameter, the end has a curled shape, the interior contains defects, the reaction can be carried out in water, the productivity is high and is larger than 80 g / L, and the technology is simple and more environmentally friendly.

The invention relates to the technical field of environmental protection, and particularly discloses a method for preparing planting soil from artificial gravel sewage mud cakes and application of the planting soil. During treatment, the mud cakes are crushed, mixed with quick lime and aged for 7 days or above; and adding sulfur powder, an organic fertilizer and magnesium sulfate into the obtained material, and mixing to obtain the planting soil. The mud cake is treated, the pH value of the mud cake is reduced, the cation exchange capacity of the mud cake is improved, the non-capillary porosity is reduced, and the content of medium trace elements is adjusted, so that the mud cake can be suitable for landscaping planting soil.

The present application discloses small molecule compounds having a naphthylamine structure and an application thereof. In the present application, the structure of a compound having a structure as shown in general formula (I) is as shown in the drawing. The compound and the pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof that are provided by the present application or the pharmaceutical composition provided by the present application can selectively induce autophagy in damaged mitochondria without affecting or only weakly affecting normal mitochondria, and further have superior metabolic stability and pharmacokinetic properties, lower toxicity, and better druggability.

The present application relates to the field of cosmetic technology, and specifically discloses an immobilized hyaluronidase and a preparation method thereof and an application in the preparation of ultra-low molecular weight hyaluronic acid. The present application pre-treats a three-dimensional foam metal, utilizes the metal ions therein to bind an organic ligand, and prepares a metal organic framework material MOFs material on the three-dimensional foam metal to achieve the immobilization of hyaluronidase. The three-dimensional foam metal MOFs material of the present application has an ultra-high specific surface area, provides multiple sites for the immobilization of hyaluronidase, and the immobilized hyaluronidase formed not only has a good immobilization effect, but also has a high thermal stability and a good salt tolerance after the immobilization of the hyaluronidase, and can be repeatedly used, and is suitable for application in industrial production.

The present invention belongs to the technical field of contaminated soil treatment, and specifically relates to a composition for repairing heavy metal-contaminated alkaline soil, its application, and a method for repairing heavy metal-contaminated alkaline soil. Hydroxyapatite and humic acid in the present invention can reduce active heavy metals in alkaline soil, reduce the toxic effects of heavy metals on giant fungus grass, and increase the biomass of giant fungus grass. Hydroxyapatite combined with humic acid and giant fungus grass treatment has no obvious effect on the pH value and conductivity of alkaline soil, while increasing the organic matter in alkaline soil and reducing the available phosphorus, which is beneficial to improving soil fertility. There is no risk of secondary pollution caused by exogenous phosphorus, showing a certain degree of environmental friendliness. The presence of giant fungus grass can also increase the number of alkaline soil microorganisms, enrich the diversity of soil microbial communities, and promote the improvement of the ecological environment of alkaline soil.

The invention discloses a mosquito-repellent fabric and a preparation method thereof, and belongs to the technical field of functional textiles. The mosquito-repelling fabric provided by the invention is a cloth sample treated by a mosquito-repelling microcapsule finishing agent, a mosquito-repelling microcapsule mainly comprises a core material and a shell material, and the core material is prepared by mixing permethrin, eucalyptus and schizonepeta essential oil; and the shell material is a bio-based material polylactic acid. Compared with mosquito-repelling microcapsules made of micro-plastic shell materials such as melamine resin, polyurea and polyurethane, the mosquito-repelling microcapsule provided by the invention is safer and more environment-friendly, low in toxicity and better in mosquito-repelling effect, and can be widely applied to the fields of textiles, daily chemicals, coatings, leather and the like.

The application discloses an improver for treating cadmium contaminated soil and a preparation method thereof, and belongs to the technical field of heavy metal contaminated soil treatment. The improver comprises the following raw materials: iron oxide, tri-potassium phosphate, biochar, corn sugar residue, xanthan gum, sodium citrate, vitamin E, arbutin, bilirubin and sodium bicarbonate. The improver is applied to cadmium contaminated soil, cadmium ions in the soil can be adsorbed and precipitated to form cadmium precipitates, the toxicity of the cadmium ions is reduced, earthworms ingest the cadmium precipitates into the body and fix them, so that the cadmium content in the soil is reduced. The improver can also promote the absorption, ingestion and digestion of cadmium ions by earthworms, maintain the normal physiological activities of the earthworms, reduce the toxic effect of cadmium on the earthworms, and make the earthworms better treat cadmium contaminated soil. The preparation method of the improver is simple, good in effect and friendly to the environment.

The present application discloses a small-molecule compound having a naphthalenethiol ether structure, and a use thereof. Disclosed in the present application are a compound having a structure represented by general formula (I), a pharmaceutically acceptable salt, a stereoisomer, a solvate or a prodrug thereof, a pharmaceutical composition containing the same, and a use thereof in the preparation of mitophagy inducer drugs. In the present application, the structure of the compound having the structure represented by general formula (I) is shown below. The compound and the pharmaceutically acceptable salt, stereoisomer, solvate or prodrug thereof, or the pharmaceutical composition provided in the present application can enhance the ability to induce mitophagy.

The invention discloses a preparation method of a porous titanium lithium adsorbent, which comprises the following steps: preparing a titanium lithium ion sieve precursor, a hydrophilic binder and a pore-foaming agent in proportion, heating and stirring in water to react, and drying and pelletizing after the reaction is finished to obtain the porous titanium lithium adsorbent. Compared with traditional PVC forming, the method has the advantages that the hydrophilic binder, the pore-foaming agent, the curing agent and the water are used for curing forming of the titanium-based lithium adsorbent, preparation of the multi-pore-channel and high-pore-volume titanium-based adsorbent is achieved, use of an organic solvent and a subsequent distillation recovery process are avoided, toxicity in the whole production process is reduced, and the method is suitable for industrial production. The production process of the lithium adsorbent is more environment-friendly, and the method has a great application prospect in the field of lithium extraction by an adsorption method.

This invention relates to the field of catalytic dehydrogenation technology for hydrogen storage materials, and discloses a method for dehydrogenating hydrogen storage materials. The method includes: contacting the hydrogen storage material sequentially with a first dehydrogenation catalyst and a second dehydrogenation catalyst under dehydrogenation reaction conditions; wherein the hydrogen storage material includes a hydrogenated N-containing heterocyclic hydrogen storage material and an impurity component; the first dehydrogenation catalyst includes a first support and a first active component supported on the first support, the first active component being Cu; the second dehydrogenation catalyst includes a second support and a second active component supported on the second support, the second active component being at least one of noble metals; the volume ratio of the first dehydrogenation catalyst to the second dehydrogenation catalyst is 1:(1-9). The dehydrogenation method provided by this invention can adapt to hydrogen storage materials containing impurity components, exhibiting high reactivity and good long-term operational stability.

The invention provides a chemical fertilizer production wastewater treatment method and device, and the treatment method comprises the following steps: mixing chemical fertilizer production wastewater and part of domestic wastewater, balancing the water quality to obtain balanced wastewater, adjusting the pH value of the balanced wastewater, and pretreating to obtain pretreated wastewater; then carrying out chemical reaction treatment, precipitation treatment and biological treatment on the pretreated wastewater to remove pollutants in the wastewater, so as to obtain treated wastewater; carrying out secondary precipitation on the treated wastewater to remove suspended solids and microbial flocs in the water; finally, water and waste residues generated after secondary precipitation are recycled. According to the treatment method, the treated effluent of the chemical fertilizer production wastewater reaches the discharge standard and meets the recycling requirement.

The present invention relates to the field of microbial technology, and in particular to a tropical Bacillus NB379, its application and bacterial agent. Tropical Bacillus NB379 was deposited in the China Center for Type Culture Collection on March 18, 2024, with a deposit number of CCTCC No: M2024509. Tropical Bacillus NB379 has acaricidal activity and stability under a variety of environmental stresses, and can grow stably in extreme pH ranges, saline-alkali conditions and heavy metal stresses. It has a unique ability to kill spider mites by contact, and can synthesize a variety of biologically active substances such as antibiotics, enzymes and plant hormones. It has a significant antibacterial effect on a variety of pathogens, shows a growth-promoting effect on plants such as tomatoes and Arabidopsis, and can reduce the toxic effects of heavy metals on plants.

The invention relates to a method for strengthening biological leaching of arsenic-containing gold ore by adopting iron-containing waste residues, which comprises the following specific steps: uniformly mixing the iron-containing waste residues with reducing coal powder, and carrying out magnetizing roasting under controlled conditions to obtain magnetic waste residues; inoculating the bacterial liquid into a 9K culture medium, adjusting the pH value, and culturing in a constant-temperature shaking table to obtain a cultured bacterial liquid; grinding the arsenic-containing gold ore and the magnetic waste residue powder, adding the ground arsenic-containing gold ore and the ground magnetic waste residue powder into the culture bacteria solution to prepare ore pulp, and carrying out constant-temperature biological leaching by controlling conditions; and after biological leaching is finished, magnetic attraction separation is conducted on the magnetic waste residues from a leaching system through a magnet, the magnetic waste residues are recycled after being washed and dried, and cyanidation gold extraction is conducted on the biological leaching residues. The method solves the existing process problems of long biological leaching period, low leaching rate and the like of the arsenic-containing ore, has the advantages of simple flow, low medicament consumption, low production cost, resource utilization of the iron-containing waste residue and the like, and has remarkable economic, social and environmental benefits.

This invention relates to the field of biomedicine, specifically to a class of prodrug structures with ROS signal-responsive properties, their preparation methods, and applications. The prodrug molecules with ROS signal-responsive properties developed in this invention can rapidly release bioactive molecules in ROS-rich environments, achieving targeted therapeutic effects. This method has good universality and has been verified to be able to prodrugize various molecules, including four approved drug molecules, improving drug solubility, biocompatibility, reducing cytotoxicity, and enhancing targeted therapeutic effects. Based on the structural characteristics of these molecules, they can also complex with PVA hydrogels to further achieve responsive and controllable drug release.

The invention discloses a preparation method of activated sludge containing biological manganese oxide and a nitrogen-containing wastewater treatment method. The preparation method comprises the following steps: S1, inoculating activated sludge into an ammonia nitrogen solution; s2, manganese-humic acid chelate is added into the mixture obtained in the step S1 for culture, and the activated sludge containing the biological manganese oxide is obtained, wherein the mass ratio of the manganese-humic acid chelate to the activated sludge to the ammonia nitrogen solution is (20-50): (450-550): (180-220). According to the present invention, humic acid HA simultaneously has oxidation (quinone group-containing) and reduction (phenol group-containing) capabilities of electron absorption and electron supply, humic acid HA is adopted as a chelating agent to prepare a manganese-humic acid chelate Mn-HA, and the manganese-humic acid chelate Mn-HA is cultured in active sludge to generate the biological manganese oxide BioMnOx; when nitrogen-containing wastewater is treated, the substance not only can oxidize NH4 < + >-N to generate NO3 <->-N and NO2 <->-N under the action of microorganisms, but also can reduce the NO3 <->-N and NO2 <->-N into N2 by virtue of low-valence manganese obtained by reduction under the action of microorganisms, so that complete removal of nitrogen is realized.

The application provides an implant surface modification method for diabetic bone repair. In view of excessive oxidative stress and unbalanced immune homeostasis of a diabetic bone defect pathological microenvironment, the application constructs a bioactive surface interface (LBL-GA@Mn) containing an antioxidant nano-enzyme and a traditional Chinese medicine immunomodulator on the surface of an implant by using a layer-by-layer self-assembly technology (LBL). The application mainly comprises the following steps: Mn3O4-BSA antioxidant nano-enzymes are prepared by a hydrothermal method and an ultrasonic method, a chitosan-18beta-glycyrrhetinic acid conjugate (CS-GA) is synthesized by an EDC / NHS acylation reaction, a gelatin (Gel) / CS-GA polyelectrolyte multilayer film structure is constructed on the surface of an implant by using a layer-by-layer self-assembly technology (LBL), and Mn3O4-BSA is used as an intercalation component of the multilayer film, so as to obtain a bioactive surface LBL-GA@Mn modified bone injury implant. The application organically fuses a new material antioxidant nano-enzyme and a traditional Chinese medicine immunomodulator, and provides a new solution for synergistic treatment of inflammatory bone diseases such as diabetic bone defects.

The invention provides a flexible fiber-based organic phototransistor serum amyloid protein A sensor and a preparation method thereof. According to the method, two flexible fibers are used as base materials, one base material is immersed in a dispersed conductive polymer and inorganic nanometer oxide mixed solution, and conductive polymer fibers are obtained and used as a source electrode and a drain electrode of the phototransistor; and the other substrate is a conductive fiber, after uniform inorganic oxide nanorods grow on the surface of the conductive fiber, inorganic quantum dots are adsorbed, and the conductive fiber is used as a grid electrode of the photoelectric transistor. The grid electrode is modified by a silane coupling agent, a serum amyloid protein A antibody solution and a biocompatible solution, and then the source electrode, the drain electrode, the grid electrode and ionic gel electrolyte are assembled to prepare the fiber-based organic phototransistor serum amyloid protein A sensor. The flexible fiber-based organic electrochemical transistor sensor disclosed by the invention is simple in preparation process, low in toxicity, good in repeatability, fast in electrochemical response to serum starch protein A, high in sensitivity and low in detection lower limit.

The present application relates to a kind of monocotyledon green wisteria rapid propagation method, using the characteristics of green wisteria specific tissue cell totipotency, under open condition, using liquid medium to induce green wisteria specific site of in vitro leaf split differentiation, produce regenerative root and regenerative bud, finally form plant.The present application aims at the rapid propagation method of green wisteria leaf, without sterile environment, convenient to take material, easy to operate, low in cost, short in period, high in survival rate, with the advantages of high efficiency, economy, easy to scale, factory, etc., in green wisteria rapid seedling, specific material preservation and propagation has greater application value.

The invention provides a method for preparing halogenated xylene with high selectivity and halogenated xylene prepared by using the method. The preparation method comprises the following steps: a diazotization reaction step: carrying out diazotization reaction on diazonium salt and 3, 4-dimethylaniline or 3, 5-dimethylaniline to obtain diazonium liquid; and a Sandmeyer reaction step: mixing the diazonium liquid with cuprous halide, and then carrying out Sandmeyer reaction to obtain a reaction product containing halogenated xylene. The method for preparing halogenated xylene with high selectivity is simple and easy to implement, high in conversion rate, few in by-products, high in selectivity, easy to separate and purify and low in toxicity.

The invention discloses a black fungus chaff extracting solution as well as a preparation method and application thereof, and belongs to the technical field of mushroom chaff reutilization. The preparation method of the black fungus chaff extracting solution comprises the following steps: selecting fresh and mildew-free black fungus chaff, naturally air-drying, crushing and sieving to obtain black fungus chaff powder for later use; adding the black fungus chaff powder into a citric acid solution, placing in a high-pressure container, and performing pressurized soaking extraction to obtain a solid-liquid mixture for later use; and centrifuging the solid-liquid mixture, and taking supernate to obtain the product. According to the preparation method, effective components in the black fungus chaff can be better and more sufficiently extracted, the content of soluble solids in the black fungus chaff extracting solution is increased, the black fungus chaff extracting solution is applied to planting of malva verticillata, gynura bicolor and mint for the first time, the germination rate and the vigor of seeds can be remarkably increased when the seeds are soaked, and the yield of the seeds is increased. Growth of different plants is adjusted, and a good growth effect is achieved.

The invention discloses a nitrogen and phosphorus removal method based on sand filtration in-situ optimization, which comprises the following steps: (1) mixing green algae obtained by centrifuging a green algae bacterial solution with a sodium alginate solution to obtain a sodium alginate and green algae mixed solution; preparing a metal cation solution; (2) spraying the sodium alginate and green alga mixed solution into a sand filter filled with a sand filter filler for 1-2 times; then spraying the metal cation solution into the sand filter for 1-2 times, and curing to obtain a modified sand filter filler of which the surface is coated with microbial hydrogel; (3) feeding sewage to be treated into the sand filter, and carrying out nitrogen and phosphorus removal purification; and (4) after the sand filter runs for 15-30 days every time, draining sewage in the sand filter, and repeating the steps (1)-(3). Hydrogel is formed through the cross-linking reaction of sodium alginate and metal cations, green algae are fixed to the outer layer of quartz sand, microbial hydrogel is formed, the quartz sand can be protected against erosion and abrasion in the filtering process, and meanwhile the nitrogen and phosphorus removal effect is improved.

The invention provides a persistent organic pollutant repairing agent as well as a preparation method and application of the persistent organic pollutant repairing agent. Nutrient substances required by normal growth of alcaligenes faecalis bacteria (Alcaligenes faecalis) and the Alcaligenes faecalis are packaged in a chitosan-calcium alginate core-shell cross-linked network structure together. According to the present invention, the alcaligenes faecalis is used as the substrate, the biochar is used as the carrier of the alcaligenes faecalis to fix the alcaligenes faecalis, and the calcium alginate is used to package the alcaligenes faecalis, such that the loss of the alcaligenes faecalis can be prevented, the microbial activity of the alcaligenes faecalis can be easily improved, and the mineralization ability of the alcaligenes faecalis on the POPs in the sediment can be improved;