23653 results about "Mixed solution" patented technology

The invention relates to a method for preparing a lithium iron phosphate / carbon composite material of a lithium ion battery, which belongs to the technical field of lithium ion batteries. The method for preparing the lithium iron phosphate / carbon composite material of the lithium ion battery comprises the following steps of: 1) preparing a suspending graphene-dispersed aqueous solution system, namely, crushing graphite to 1 to 5 microns, adding the crushed graphite into distilled water or purified water, adding 0.1 to 5 percent of surfactant, heating with stirring the mixed solution to 180 to 250 DEG C in a sealing way, performing stirring for 2 to 6 hours and reducing the temperature; 2) crushing lithium iron phosphate to the particle size of 1 to 5 microns, adding the crushed lithium iron phosphate into the distilled water or the purified water, adding with stirring 0.01 to 1 percent of coupling agent, performing uniform stirring, adding the graphene-dispersed aqueous solution, and performing stirring and filtration; and 3) vacuum-drying solid powder obtained by the filtration, and calcinating the dried solid powder for 2 to 12 hours to obtain the graphene-coated lithium iron phosphate cathode material. The method has the advantages of simple process, high material performance, high conductivity, high bulk density, high compacted density and the like.

The invention discloses immobilized bacteria-algae microspheres, a preparation method thereof and application of the immobilized bacteria-algae microspheres in removal of ammonia nitrogen and total phosphorus in aquaculture water. The preparation method comprises the following steps: adding polyvinyl alcohol and sodium alginate into deionized water, heating and sterilizing while fully dissolving polyvinyl alcohol and sodium alginate to obtain an embedding medium; adding the iron modified biochar powder into a mixed solution of chlorella and photosynthetic bacteria for adsorption to obtain a bacteria-algae-biochar mixture; adding the bacteria-algae-biochar mixture into an embedding medium to form a gel solution; adding the gel solution into a cross-linking agent for cross-linking, and after cross-linking, separating a solid and cleaning to obtain immobilized bacteria-algae microspheres; the preparation method of the iron-modified biochar powder comprises the following steps: adjusting the pH value of a mixed solution containing biochar powder, Fe < 2 + > and Fe < 3 + > to 9.5-10.5, carrying out heat preservation stirring at 75-85 DEG C for 1-5 hours, carrying out solid-liquid separation, taking a solid, washing, and drying to obtain the iron-modified biochar powder.

The present invention belongs to the field of sensors, and relates to an ion gel film with a microstructure on the surface, a preparation method, and an ion-type sensor. The preparation method comprises: sandblasting on a precursor substrate to obtain a substrate, forming a mixed solution of a polymer and an ionic liquid on the substrate to obtain a wet film, and drying and curing the wet film to obtain an ion gel film, wherein the precursor substrate has an arc-shaped recess array, and the sandblasting conditions include: the sandblasting particle size is 5000 mesh to 10000 mesh, and the sandblasting pressure is 2 bar to 10 bar. The ion gel film is used for an ion-type sensor, which can improve the detection sensitivity of the sensor.

The invention discloses a preparation method and application of a vertically-oriented boron nitride / epoxy resin heat-conducting composite material under a magnetic field, and belongs to the field of composite materials. The invention aims to solve the problems of high cost, complex process and narrow application range of the existing filler directional arrangement method. The method comprises the following steps: 1, preparing a mixed solution of boron nitride and ferroferric oxide; 2, preparing a boron nitride nanosheet solution with ferroferric oxide attached to the surface; (3) preparing BNNS coated Fe3O4; and 4, preparing the vertically-oriented boron nitride / epoxy resin heat-conducting composite material under the magnetic field. The invention relates to application of a vertically-oriented boron nitride / epoxy resin heat-conducting composite material in electronic packaging under a magnetic field. The heat conductivity of the epoxy resin can be effectively improved, the process is simple and reliable, the efficiency is high, the cost is low, the heat conductivity coefficient is high, and the method can be applied to electronic packaging.

The invention relates to the technical field of solid-state lithium batteries, in particular to a cellulose acetate modified PEO-based solid-state electrolyte membrane, a solid-state lithium battery and a preparation method thereof.The preparation method comprises the steps that lithium bis (trifluoromethanesulfonyl) imide, cellulose acetate and polyethylene oxide are dissolved in a solvent, and a mixed solution is obtained; and curing the mixed solution in a mold to obtain the cellulose acetate modified PEO-based solid electrolyte membrane. According to the invention, the cellulose acetate is introduced to modify the polyethylene oxide solid electrolyte, and the prepared cellulose acetate modified PEO-based solid electrolyte membrane can generate a stable solid electrolyte interface rich in Li2O and LiF on the surface of a lithium negative electrode in situ in the application of a solid lithium battery, so that the growth ability of lithium dendrites is effectively inhibited, and the performance of the lithium battery is improved. The interface impedance is reduced, and the operating temperature range of the solid-state lithium battery is widened.

The invention relates to the technical field of biological sewage treatment, in particular to a device and a method for improving the autotrophic nitrogen removal performance of an MABR (Membrane Ammonia Baffled Reactor). Coupling of partial nitrosation reaction and anaerobic ammonia oxidation reaction is completed; through a circular reaction zone and a membrane reaction zone in the reaction tank, nitrate nitrogen generated by anaerobic ammonia oxidation and excessive nitrite nitrogen during instability regulation are circularly removed, and the purpose of improving the total nitrogen removal effect of the reactor is achieved; a proper amount of a sodium nitrite solution is added at proper time, the concentration of free nitrous acid in a mixed solution of the reactor is increased, and the intermittent proportion of MABR intermittent aeration is synchronously regulated and controlled, so that the activity of nitrite oxidizing bacteria is synergistically inhibited by low dissolved oxygen and high free nitrous acid, and the unstable short-cut nitrification reaction is recovered again; the autotrophic nitrogen removal performance of the reactor is improved.

The invention belongs to the technical field of aerogel materials, and particularly relates to antistatic aerogel for 3D printing as well as a preparation method and application of the antistatic aerogel. The preparation method comprises the following steps: (1) dispersing inorganic nanoparticles modified by a silane coupling agent containing epoxy groups and an aniline monomer in an acidic solvent to obtain a monomer mixed solution; (2) stirring and dissolving polyamide in the monomer mixed solution; (3) initiating a reaction to obtain a polyaniline modified polyamide solution; and (4) freeze-drying to obtain the antistatic aerogel for 3D printing. By controlling synthesis conditions, a core-shell structure of acid-doped polyaniline coated inorganic nanoparticles is formed, and a good conductive path is formed in polyamide with a small addition amount of polyaniline. The antistatic aerogel for 3D printing can be applied to technologies such as photocuring molding and fused deposition of polyurethane resin in a 3D printing technology, and the antistatic property and the mechanical property of a 3D printed product are improved.

The invention relates to the technical field of lithium ion battery diaphragm preparation, in particular to modified aramid diaphragm coating slurry, a battery diaphragm and a preparation method thereof.The preparation method of the modified aramid diaphragm coating slurry comprises the steps that under protection of inert gas, a cosolvent is dissolved into a polymerization solvent, and a solvent-cosolvent mixed system is obtained; adding p-phenylenediamine into the solvent-cosolvent mixed system, and dissolving to obtain a mixed solution; adding paraphthaloyl chloride into the mixed solution in batches, controlling the temperature of the system, and carrying out polymerization reaction, so as to obtain the modified aramid diaphragm coating slurry after the polymerization reaction is finished, in the preparation method, a third monomer is also added to participate in the polymerization reaction, and the third monomer is at least one of an amine third monomer and an acyl chloride third monomer. The modified aramid diaphragm coating slurry can be used for preparing a battery diaphragm with heat resistance and air permeability, and the process is simple.

The invention relates to the technical field of adsorption materials, and discloses a preparation method and application of a hydrogel adsorption material prepared by copolymerizing cellulose with acrylic acid and acrylamide. The method comprises the following steps: extracting cellulose from corn straws; placing cellulose in a sodium hydroxide / urea / water system, stirring and dissolving; the preparation method comprises the following steps: uniformly mixing acrylamide and acrylic acid in water to prepare a modified solution; sequentially adding the modified solution, N, N '-methylene bisacrylamide and potassium persulfate into the cellulose solution, and stirring and mixing; putting the mixed solution into a drying oven for gelation to obtain the cellulose co-polyacrylamide and acrylic acid hydrogel adsorption material. A large number of groups such as hydroxyl and carboxyl are introduced to the surface of the hydrogel adsorption material prepared by the method, the adsorption capacities of heavy metals such as lead, cadmium and copper reach 434.8 mg / g, 277.7 mg / g and 261.8 mg / g respectively, and heavy metal ions in a water body can be effectively and quickly removed.

The invention relates to the technical field of lithium dihydrogen phosphate, and discloses a method for preparing battery-grade lithium dihydrogen phosphate by using lithium precipitation mother liquor. The method comprises the following steps: (1) mixing a hydrochloric acid solution with a lithium precipitation mother solution until the pH value of the obtained reaction solution is 4-5; (2) heating the reaction solution, adding the sodium phosphate solution into the reaction solution to adjust the pH value to 9-10, and reacting to obtain crude lithium phosphate; (3) adding a phosphoric acid solution into the crude lithium phosphate until the pH value of the obtained mixed solution is 3-5.5; (4) carrying out first reduced pressure evaporation on the crude lithium dihydrogen phosphate solution, and carrying out solid-liquid separation on a first concentrate to obtain a first solid phase and a first mother solution; (5) dissolving the first solid phase in hot water, carrying out second reduced pressure evaporation, and carrying out solid-liquid separation on a second concentrate to obtain a second solid phase and a second mother solution; the solid content of the second concentrate is higher than that of the first concentrate. The lithium dihydrogen acid prepared by the method is high in purity, and the comprehensive yield of lithium is high.

The invention discloses a preparation method of a chitosan-sodium alginate-diatomite composite adsorbent. The preparation method comprises the following steps: (1) carrying out calcination pretreatment on diatomite; (2) dissolving sodium alginate powder in water; (3) adding the calcined diatomite into a sodium alginate solution to prepare a mixed solution a; (4) adding CaCl2 into an acetic acid solution for dissolving; (5) adding chitosan powder into a CaCl2 solution, and uniformly stirring to obtain a mixed solution b; (6) dropwise adding the mixed solution a into the mixed solution b for crosslinking to prepare SA / DM / CS composite gel balls; and (7) washing the gel balls with water for several times, repeatedly freezing and thawing for several times, and drying to obtain the composite adsorbent. The composite adsorbent is prepared by dropwise adding the sodium alginate solution containing the calcined diatomite into the mixed solution of the chitosan and the CaCl2, so that the problem of low mechanical strength of single sodium alginate hydrogel is solved, and the recycling stability of the hydrogel microsphere adsorbent is improved.

The utility model provides a detergent putting device and clothes processing equipment. The detergent putting device comprises a liquid outlet waterway, a first waterway and a second waterway. The liquid outlet waterway is provided with a water inlet end and a water outlet end. The water inlet end of the first waterway is communicated with a water source, the water outlet end of the first waterway is communicated with the water inlet end of the liquid outlet waterway and used for conveying a detergent mixed solution, and the water inlet end of the second waterway is communicated with the water source and the water outlet end of the second waterway is communicated with the water inlet end of the liquid outlet waterway. Fluid in the first water path and fluid in the second water path converge in the liquid outlet water path, and the fluid in the first water path is a detergent mixed solution. The flow velocity of the water outlet end of the second waterway is greater than that of the water outlet end of the first waterway, or the flow velocity of the water outlet end of the first waterway is greater than that of the water outlet end of the second waterway. According to the detergent putting device provided by the invention, the detergent, especially the powdery detergent, is put into the clothes treatment cavity of the clothes treatment equipment after being fully dissolved, so that the dissolution degree and the cleaning effect of the detergent are improved, and the user experience is improved.

The utility model provides a detergent putting device and clothes processing equipment. The detergent feeding device comprises a detergent supply assembly, a liquid outlet water path, a first water path and a second water path. The detergent supply assembly is provided with a first water outlet for discharging a detergent mixed solution; the first waterway is communicated with a water source, the first water outlet and the water inlet end of the liquid outlet waterway; the second waterway communicates with a water source and the water inlet end of the liquid outlet waterway; the first water outlet is higher than the water inlet end of the liquid outlet water path in the gravity direction, so that the detergent mixed solution in the first water path and the fluid in the second water path converge in the liquid outlet water path under the gravity effect, and the fluid in the first water path is the detergent mixed solution. According to the detergent putting device and the clothes treatment equipment, the detergent, especially the powdery detergent, is put into the clothes treatment cavity after being fully dissolved, the dissolution degree and the cleaning effect of the detergent are improved, and the user experience is improved.

Disclosed in the present invention is a process for deeply removing fluorine from wastewater by means of an induced crystallization method in sludge backflow. The process comprises the following steps: step 1. placing lime powder and deionized water in a seed crystal reactor to prepare lime milk and at the same time putting a calcite seed crystal into the seed crystal reactor; step 2. introducing high-concentration fluorine-containing acidic wastewater into a reactor; and step 3. introducing the lime milk obtained in step 1 into the reactor in step 2 to undergo a reaction, wherein during the reaction, the pH value of the mixed solution is controlled to remain neutral. The present invention is based on a high-density sludge method (HDS process). By utilizing the HDS process, the advantages of effectively improving the sludge density, reducing the lime consumption, facilitating the operation, and enabling the water quality of an effluent to be more stable are realized. In conjunction with induced crystallization technology, an induced crystallization process in a high-density sludge backflow is formed to promote precipitation and crystallization and allow sedimentation to proceed quickly, thereby shortening the process time and overcoming the defects of traditional lime precipitation methods.

The invention belongs to the field of pet deodorization, and particularly relates to pet shower balm containing natural deodorization extracts and lasting in fragrance and a preparation method of the pet shower balm. The shower balm for pets comprises the following raw materials: a persimmon extract, silica, an emulsifier, an antioxidant, a hard water ion chelating agent, a thickening agent and a solubilizer. The preparation method comprises the following steps: mixing the persimmon extract and the silica to obtain a solution A; mixing coconut oil, olive fruit oil and glycerol to obtain a solution B; adding sodium polyacrylate and microcrystalline cellulose into water, and dissolving; adding a hard water ion chelating agent, and mixing to obtain a mixed solution; and finally, adding the mixed solution into the solution A and the solution B, mixing, cooling, adding the antioxidant, and stirring. The persimmon extract and the silica have a very good removal promoting effect, and have a good application prospect.

The invention belongs to the technical field of wastewater treatment, and particularly relates to an efficient ozone micro-nano bubble preparation system and a process method thereof. The device further comprises an ozone preparing unit, a gas conveying pipeline, a jet flow unit, a spiral mixing unit, a Venturi tube, a microporous membrane unit and a reaction unit. The ozone producing unit is connected with the jet flow unit through a gas conveying pipeline, the ozone producing unit comprises an ozone generator, and the gas inlet pressure is regulated and controlled through a gas valve in the gas conveying pipeline; and the jet flow unit is used for generating and conveying a mixed solution with ozone microbubbles. The jet flow unit enables the mixed liquid to form ozone microbubbles based on a Venturi effect and a hydraulic shearing effect; by arranging the jet flow unit, the spiral mixing unit, the Venturi tube and the microporous membrane unit, ozone micro-nano bubbles with high concentration and uniform size distribution can be generated under relatively low energy consumption, so that the treatment efficiency of the ozone micro-nano bubbles in the technical fields of wastewater treatment and environmental protection is improved.

The invention provides a method for predicting reaction activity of a geopolymer precursor material, which comprises the following steps: S1, weighing the geopolymer precursor material A, and mixing with a NaOH solution; s2, heating and stirring the mixed solution in the S1, and reacting to obtain a composite solution; s3, carrying out suction filtration on the composite solution; drying and weighing filter residues obtained by suction filtration; s4, measuring the ion concentration in the filtrate obtained by suction filtration in S3; s5, calculating the dissolution rate of the A by using the mass of the A and the mass of the filter residues; s6, testing the actual activity index of the geopolymer precursor material A; s7, obtaining a calculation formula of the predicted activity index of A by using the dissolution rate and the ion concentration; and S8, solving a calculation formula of the actual activity index in S6 and the predicted activity index in S7 to obtain a calculation model of the predicted activity index of A. The problems that in the prior art, geopolymer precursor material reaction activity prediction is time-consuming and labor-consuming, not suitable for all environments and large in error are solved.

The invention provides a method for improving the stability of a perovskite nanocrystal, which comprises the following steps: S1, preparing the perovskite nanocrystal: mixing a perovskite nanocrystal precursor and a micro / mesoporous template to obtain a mixture; calcining the mixture under the condition that the collapse temperature of the micro / mesoporous template is lower than that of the micro / mesoporous template, so as to generate perovskite nanocrystals in the pore channels of the micro / mesoporous template; s2, post-treatment by a hydrothermal method; and S2, dispersing the perovskite nanocrystals obtained in the step S1 in a high-pressure reaction device filled with an inorganic fluoride solution, and treating the mixed solution through a hydrothermal method to obtain the perovskite illuminant. According to the method, the stability of the perovskite nanocrystals can be improved without collapsing the micro / mesoporous template.

The invention relates to the technical field of freeze-dried preparations, and provides exosome freeze-dried powder as well as a preparation method and application thereof. The exosome freeze-drying preparation is prepared by mixing an exosome solution and a freeze-drying protection solution and then freeze-drying the mixture, the concentration of the exosome solution in the mixed solution is 0.1-10% V / V, and the freeze-drying protection solution comprises 0.4-4% W / V of saccharides and 0.25-4% W / V of alcohols; the saccharide is trehalose, cane sugar or lactose; the alcohol is mannitol, sorbitol or a combination of mannitol and polyethylene glycol; and the solvent is sterilized water for injection or a PBS buffer solution. The exosome freeze-dried powder is stable in activity, small in irritation, good in safety and good in fibroblast proliferation promoting capacity, when the exosome freeze-dried powder is applied to supporting essence or masks in the medical beauty industry, the exosome activity of the exosome freeze-dried powder is still kept stable, and the application prospect is good.

The invention belongs to the technical field of oil and gas field development, and particularly relates to a CO2 thickening agent for supercritical CO2 oil displacement and a preparation method of the CO2 thickening agent. The preparation method of the CO2 thickening agent for supercritical CO2 oil displacement comprises the following steps: (1) mixing a maleic anhydride compound and a styrene compound, dissolving in water, introducing inert gas, and heating; (2) slowly dropwise adding a mixed solution of a vinyl acetate compound and an initiator, and cooling after the reaction is finished; and (3) filtering, washing a solid phase by using an anhydrous alcohol substance, drying, and grinding to obtain a thickening agent product. The supercritical CO2 thickened by the thickening agent prepared by the invention can effectively slow down the viscous fingering phenomenon in the displacement process and improve the CO2 sweep efficiency, thereby improving the crude oil recovery rate.

The invention relates to the technical field of adsorbents, and particularly discloses an aluminum oxide type adsorbent and a preparation method thereof.The preparation method comprises the following steps that lanthanum salt, cerium salt and a polyethylene glycol aqueous solution are mixed to be uniform, then the mixture is mixed with gamma-Al2O3 to be uniform, pH is adjusted, standing is conducted, solid-liquid separation is conducted, drying and roasting are conducted, and a double-doped carrier is obtained; dispersing the double-doped carrier in a mixed solution containing 2-methylimidazole, ferric salt and zinc salt, adjusting the pH value, carrying out heating reaction, solid-liquid separation and drying in an inert atmosphere, grinding to obtain powder, and carrying out molding treatment on the powder to obtain a composite carrier; uniformly mixing the Ag modified molecular sieve with silica sol, coating the surface of the composite carrier with the mixture, and drying to obtain an adsorbent precursor; dipping an adsorbent precursor in the dispersion liquid, and after dipping, solid-liquid separation and drying, reactivating to obtain the aluminum oxide type adsorbent; the prepared adsorbent can synergistically and efficiently remove multiple impurities and is excellent in corrosion resistance.

The invention relates to a preparation method of an amino-functionalized metal organic framework material and application of the prepared material to separation of CO2 / N2 and CO2 / CH4. The preparation method comprises the following steps: dissolving adenine and copper nitrate trihydrate in N, N '-dimethylacetamide to obtain a first mixed solution; dissolving carboxylic acid and potassium carbonate in deionized water to obtain a second mixed solution; and adding the second mixed solution into the first mixed solution, carrying out stirring reaction, and carrying out vacuum drying on an obtained solid product to obtain the amino-functionalized metal organic framework material. The amino-functionalized metal organic framework material prepared by the invention has high CO2 adsorption selectivity and adsorption capacity, and also has good acid-resistant, alkali-resistant and water-resistant stability. The amino-functionalized metal organic framework material prepared by the preparation method disclosed by the invention is applied to industrial CO2 adsorption separation and has an excellent separation effect.

The invention provides a three-dimensional network polymer gel electrolyte, a positive plate and a solid-state lithium battery. The three-dimensional network polymer gel electrolyte comprises 80-98% of an organic solvent, 5-15% of a lithium salt, 2-8% of lignosulfonate, 2-10% of a polymeric monomer and 2-8% of an ionic liquid, and the polymeric monomer is selected from acrylamide, polyethylene glycol dimethacrylate, 3-(methacryloyloxy) propyl trimethoxy silane or tetrahydrofurfuryl acrylate and the like. Under ultraviolet light, lignosulfonate can spontaneously generate quinonyl photochemical free radicals and hydroxyl photochemical free radicals in a mixed solution of ionic liquid and specific polymer monomers, and under the action of the photochemical free radicals, the lignosulfonate reacts with unsaturated double bonds on a polymer through phenolic groups, so that the photochemical free radicals are formed. The gel electrolyte with a three-dimensional network structure is formed, the mechanical strength can be improved, the growth of lithium dendrites in a lithium metal battery can be inhibited, and the metal lithium battery containing the gel electrolyte has excellent cycle life and safety performance.

The invention discloses a composite electrode material for removing uranium through photoelectrocatalysis and a preparation method and application of the composite electrode material, and belongs to the technical field of catalytic materials and wastewater treatment.The preparation method of the composite electrode material comprises the following steps that a ZIF-8 material, copper salt and ferric salt are mixed, and a first metal composite material is prepared; reacting the first metal composite material with a KOH solution to prepare a second metal composite material; carrying out carbonization treatment on the second metal composite material, and then carrying out acid treatment by using acid to obtain a bimetallic atom catalytic material; the preparation method comprises the following steps: dispersing a bimetallic atom catalytic material and a g-C3N4 material in a mixed solution containing phytic acid and a Nafion solution to obtain catalyst ink; and coating the catalyst ink on a substrate, and carrying out illumination drying to obtain the composite electrode material. According to the composite electrode material, under the synergistic effect of the bimetallic single atomic cluster catalyst and g-C3N4, respective advantages are fully exerted, and efficient deposition removal of uranium is achieved.

The invention relates to L-alanine, a preparation method and a fermentation device, and relates to the technical field of L-alanine. The culture medium contains a carbon source, a nitrogen source, a phosphorus source and trace elements; the L-alanine is synthesized by the microorganisms by controlling fermentation conditions and time; the invention further relates to an L-alanine preparation method, an L-alanine preparation device is adopted, the L-alanine preparation device comprises a fermentation tank and a stirrer for mixing a plurality of raw materials of L-alanine, and the stirrer is further provided with a treatment part for treating floating foam, oily substances and impurities generated in the stirring process. The processing part can collect floating foam on the surface of the mixed solution and can also collect impurities and oily substances in the mixed solution, and meanwhile an opening and closing door on the processing part can be opened and closed, so that the impurities difficult to capture in the mixed solution fluctuation state are collected in a unified mode; and the removal rate of floating foam and impurities is greatly improved.

The utility model provides a detergent putting device and clothes processing equipment. The detergent feeding device comprises a detergent supply assembly, a liquid outlet waterway, a first waterway and a second waterway. The detergent supply assembly is provided with a detergent passage and a first water outlet, and the detergent passage is communicated with the external space of the detergent putting device. The liquid outlet waterway is provided with a water inlet end and a water outlet end. The first waterway is communicated with a water source, the detergent passage, the first water outlet and the water inlet end of the liquid outlet waterway. The second waterway communicates with the water source and the water inlet end of the liquid outlet waterway. Fluid in the first water path and fluid in the second water path converge in the liquid outlet water path, and the fluid in the first water path is a detergent mixed solution. According to the detergent putting device, the detergent, especially the powdery detergent, is put into the clothes processing cavity after being fully dissolved, the dissolution degree and the cleaning effect of the detergent are improved, and the user experience is improved.

The invention discloses a compensation method based on ultraviolet-visible spectrum interaction interference, which relates to the technical field of spectral analysis, and comprises the following steps: acquiring ultraviolet-visible spectrum data of turbidity, COD, nitrate single gradient solution and mixed solution of the turbidity, COD and nitrate single gradient solution, and preprocessing the data; constructing a mapping relation model of the turbidity and the spectral data; for spectral data within the wavelength range of 260-320nm, calculating interactive interference data, establishing a relationship between the turbidity and the interactive interference data, and performing interactive interference compensation and spectral analysis; for the spectral data in the wavelength range of 220-260nm, constructing a COD and spectral data relation model, and calculating interactive interference data; and based on the interactive interference data characteristics, establishing a regression model, analyzing the relationship between the interference spectrum characteristics and other substances, and performing interactive interference compensation and spectral analysis. According to the method, the resolution of the spectral signal is remarkably improved, the reliability of data analysis is improved, and the method has a wide application prospect.

The invention discloses a preparation and regeneration method of an iron-aluminum-lanthanum-based composite fluorine removal agent, relates to the technical field of fluorine removal agent preparation, and aims to solve the problem that the performance of an existing fluorine removal agent needs to be improved. The preparation method comprises the following steps: weighing raw materials according to a molar ratio of iron ions to aluminum ions to lanthanum ions of 1: 1: 1, fully stirring and dissolving the raw materials in deionized water at room temperature, and making the volume constant to prepare a clear mixed solution; adding excessive triethanolamine into the mixed solution, dropwise adding a nitric acid solution, adjusting the pH value of the mixed solution to 3.0-4.0, continuously stirring at room temperature, and fully reacting to obtain a precursor solution; continuously heating and stirring the precursor liquid at 150 DEG C for dehydration to obtain organic group brown fluffy precursor powder; fully grinding the precursor powder, and calcining to obtain a gray powdery iron-aluminum-lanthanum-based composite fluorine removal agent; the method is simple, the prepared fluorine removal agent is large in adsorption capacity and short in reaction time, most of the adsorption capacity can be recovered through simple acid pickling, operation is easy, the service life is long, and the regeneration cost is low.

The invention provides a personalized functional nutritional tea point rich in tea polyphenol and resveratrol and a 3D printing manufacturing method. The personalized functional nutritional tea point comprises a shell and an inner core, wherein the shell and the inner core are respectively a shell gel material and an inner core gel material; the inner core gel material comprises a water-oil double-gel material rich in tea polyphenol and resveratrol; wherein the water-oil double-gel material is prepared by the following steps: adding chitosan, betaine and vanillin into a mixed solution of corn starch, chickpea protein and water, heating and incubating to obtain hydrogel; and dissolving the tea polyphenol in the hydrogel to obtain the tea polyphenol hydrogel. The oleogel is obtained by melting and mixing beeswax and linseed oil, and then dissolving resveratrol in the oleogel; the personalized functional nutritional tea point is high in content of active ingredients of tea polyphenol and resveratrol and has heat stability, illumination stability and storage stability; the 3D coaxial printing technology is utilized, the functional components are further stabilized, tea points of various patterns and shapes can be obtained, and the method has personalized food preparation and application value.

The invention discloses a buccal product and a preparation method thereof, and belongs to the technical field of smokeless tobacco products. The preparation method of the buccal product comprises the following steps: raw materials are mixed to obtain a mixture, and the raw materials comprise the following components in parts by mass: 40-90 parts of a base material, 0.5-10 parts of a nicotine raw material, 1-3 parts of a sweetening agent, 0.5-2 parts of edible essence and 3-7 parts of an adhesive; the mixture is dissolved in a solvent to obtain a mixed solution, and the mass part of the solvent is 1-40; coating the mixed solution to obtain coated particles; and drying the coated particles to obtain the buccal product. According to the preparation method provided by the invention, based on selection of the raw material components and control of the proportional relation among the raw material components, a coating treatment process is adopted, so that the nicotine raw material is attached to the base material, the base material is coated with the adhesive, and due to the fact that the dissolving speed of the adhesive in the oral cavity and the acting force of the base material on the nicotine are relatively stable, the oral cavity is not damaged. Therefore, the release rate of nicotine can be stably controlled.