591 results about "Iron salts" patented technology

The invention belongs to the technical field of catalysts, and relates to a surface-reconstructed heterojunction catalyst and a preparation method and application thereof. The preparation method comprises the following steps: dissolving cobalt salt, ferric salt and praseodymium salt in deionized water, heating and spraying on a carrier to prepare praseodymium-doped ferrocobalt layered double hydroxide; mixing the praseodymium-doped ferrocobalt layered double hydroxide with a phosphorus source, and calcining in an inert atmosphere to prepare praseodymium-doped CoP / Fe2P; and carrying out electrooxidation treatment on the praseodymium doped CoP / Fe2P, so as to prepare the Pr6O11 cluster modified CoFeOOH heterojunction catalyst. Through cooperation of three technologies of spray thermal deposition, phosphating and electrooxidation, stable construction and electrochemical activation of a heterogeneous interface are realized, the corrosion resistance and chlorine evolution resistance competitive capacity of the catalyst in a chlorine-containing alkaline system are remarkably improved, the current density of 100 mA. Cm <-2 > can be achieved only through 223 mV overpotential, and meanwhile, stable operation is performed for 500 h.

The invention discloses a method for preparing calcium hydroxide with high specific surface area and high pore volume by a semi-dry method, which comprises the following steps: S1, adding an alcohol reagent into water, and uniformly mixing to obtain a solution A; s2, adding a composite cationic surfactant into the solution A, and dissolving to obtain a solution B; s3, adding an iron salt solution into the solution B, and uniformly mixing to obtain a solution C; s4, adding triethanolamine into the solution C, and performing ultrasonic dissolution to obtain a solution D; and S5, spraying the solution D into calcium oxide powder, continuously stirring, and reacting to prepare calcium hydroxide with high specific surface area and high pore volume. The calcium hydroxide prepared by the method has a high specific surface area and a rich pore structure, is powdery after reaction, and is relatively low in water content.

The invention discloses a high-solid-content MIL-101 (Fe) / PIM-1 mixed matrix membrane and a preparation method thereof, and belongs to the technical field of gas separation membranes. The preparation method comprises the following steps: firstly, dissolving an iron source in a PIM-1 polymer solution to form a homogeneous membrane casting solution; forming the obtained membrane casting solution, and removing the solvent to obtain a PIM-1 / Fe (II) composite substrate containing Fe (III); then, the substrate is alternately immersed in a terephthalic acid methanol solution and a ferric salt methanol solution, and MIL-101 (Fe) is generated in the polymer matrix through in-situ limited crystallization by layer-by-layer limited crystallization. According to the method, the problem of interfacial compatibility between the MOF filler and the polymer matrix is effectively solved, and high loading capacity (up to 52.9 wt.%) of MIL-101 (Fe) is realized without agglomeration. Meanwhile, the membrane has excellent COplasticizing resistance and long-term operation stability, and has a wide application prospect in the fields of carbon capture and the like.

The invention belongs to the technical field of nano materials, and relates to a carbon thermal reduction driven high-entropy oxide metastable-state material and a preparation method and application thereof.The preparation method comprises the steps that S1, carbon and soluble metal salt are dissolved in a solvent for ultrasonic treatment, and a metal salt solution and a carbon suspension are obtained; s2, adding a metal salt solution into the carbon suspension, adding strong base, and stirring to obtain a coprecipitation polymer; s3, re-dispersing the coprecipitation polymer in the solvent, adding extra ferric salt and urea, mixing and stirring, and freeze-drying the mixed solution to obtain precursor powder; s4, performing staged annealing treatment on the precursor powder under low oxygen partial pressure to obtain a carbon-loaded high-entropy oxide metastable-state material; the prepared high-entropy oxide metastable-state material is of an alloy phase and high-entropy oxide double-phase coupling structure, the polarization loss of electromagnetic waves is enhanced through a heterogeneous interface, and the high-entropy oxide metastable-state material has the advantages of being excellent in impedance matching and wide in electromagnetic wave absorbing bandwidth and can be widely applied to the fields of industrial electronics, medical communication and military stealth.

The invention discloses a catalytic electrode which comprises a substrate, and an anti-corrosion layer and a sulfur-phobic layer which are sequentially attached to the substrate, the substrate is a blank foamed nickel substrate, the anti-corrosion layer is formed by dipping the foamed nickel substrate with a ferric salt solution, and the sulfur-phobic layer is formed by processing a precursor with a cobalt salt solution through electro-deposition. Accordingly, a corresponding preparation method is also established, a blank foamed nickel substrate is adopted, firstly, the foamed nickel substrate is subjected to dipping treatment with an iron salt solution to obtain a precursor with an anti-corrosion layer, and then the precursor is subjected to electro-deposition treatment with a cobalt salt solution to form the sulfur-phobic layer on the anti-corrosion layer. Wherein the anti-corrosion layer can isolate a high-sulfur environment and prevent the substrate from being corroded; the sulfur phobic layer may prevent sulfur products from depositing and passivating the electrode. The catalytic electrode provided by the invention solves the problems of sulfur reaction corrosion and passivation, shows excellent catalytic activity and stability, and can be used for catalyzing sulfur oxidation reaction for a long time. In conclusion, the method has the advantages of mild conditions, simple process, economy and practicability, and has obvious large-scale industrial production potential.

The invention discloses a mixed ferrovanadium flow battery based on a redox targeting reaction, and belongs to the technical field of flow batteries. The problems that an existing vanadium-based flow battery is high in cost and limited in energy density are solved. According to the invention, the iron salt with low price is used for partially replacing the vanadium salt with high price, and the cost of the electrolyte is effectively reduced and the capacity and the energy density of the battery are effectively improved through the redox targeting reaction between the ferrovanadium electrolyte double-medium and the solid active substance; the battery keeps stable circulation and coulombic efficiency under relatively high current density, so that large-scale application of the vanadium-based flow battery becomes possible.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a pretreatment method for improving the leaching rate and the carbon adsorption rate of high-sulfur-arsenic gold ore. Comprising the following steps that the high-sulfur-arsenic gold ore is ground and then prepared into ore pulp; a green oxygen activating agent and hydrogen peroxide are sequentially added into the ore pulp, oxidation pretreatment is conducted on the high-sulfur-arsenic gold ore, ore pulp activating liquid is formed, and the green oxygen activating agent is a mixture of calcium oxide, sodium persulfate and soluble bivalent iron salt; and adding a gold leaching agent into the ore pulp activation solution, adjusting the pH value of the ore pulp to 9-12, carrying out stirring gold leaching treatment, filtering to obtain a leaching solution, and then adding activated carbon to adsorb and extract gold. According to the method, a stronger oxidation environment is provided, meanwhile, the residual concentration of arsenate radicals in the solution is effectively reduced, the leaching rate of gold and the adsorption rate of activated carbon are greatly increased, excellent oxidation performance and environment friendliness are shown, and a more sustainable high-sulfur-arsenic gold ore pretreatment process is provided.

The invention discloses a metal element doped MnO2 and MnFe oxide composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of flue gas desulfurization and denitrification. The preparation method comprises the following steps: dissolving potassium permanganate, divalent manganese salt and doped metal salt in water for reaction to prepare metal element doped MnO2; and mixing and reacting with a template agent, ferric salt and sodium salt, drying and roasting to obtain the final catalyst. The MnO2 electronic structure is modulated by doping metal elements, and the three-dimensional porous structure of the MnFe oxide is constructed by using the template agent, so that the catalyst has efficient adsorption and strong catalytic oxidation capacity, NO and SO2 can be synergistically removed at the same time, and the catalyst has desulfurization and denitrification activity in a wide temperature range of 30-300 DEG C, and is suitable for industrial production. And liquid ammonia does not need to be used in the purification process, so that the purification agent is high in safety and is particularly suitable for purification treatment under complex flue gas conditions in the non-electric industry.

The invention provides a remediation method for hexavalent chromium polluted underground water, and relates to the technical field of water treatment. According to the preparation method, rice hulls are adopted as raw materials and treated through an oxygen-limited pyrolysis-ferric salt dipping composite technology, and the rice hull-based iron-rich biochar material is obtained; loading microorganisms with the rice hull-based iron-rich biochar material to obtain an adsorption material; the adsorption material is used for carrying out adsorption treatment on the hexavalent chromium-containing polluted underground water. Aiming at Cr (VI) polluted underground water, a prepared rice husk-based iron-rich biomass material is adopted to load domesticated soil indigenous microorganisms, and the domesticated soil indigenous microorganisms are added into a nearly neutral Cr (VI) polluted soil / underground water reaction system, so that efficient reductive degradation of Cr (VI) is realized, and the influence mechanism of Fe < 3 + > is explored.

The invention provides a processing method and application of seaweed mud-based biochar. The method comprises the following steps: (1) cleaning and deodorizing treatment: adding water into seaweed mud, stirring, precipitating and separating impurities, adding a sodium hydroxide solution, carrying out alkali washing and swelling, removing impurities and fishy smell, and forming a porous structure; (2) adding an iron salt solution for pretreatment to enable the seaweed mud to adsorb iron ions, filtering after adsorption is completed, and performing ball milling on a filtered product to obtain ball-milled seaweed mud particles; (3) pre-oxidizing in an air atmosphere, raising the temperature to 160-180 DEG C, and keeping the temperature for 2-5 hours; and (4) performing pyrolysis under the protection of nitrogen, heating to 900-1300 DEG C, and keeping the temperature for 8-16 hours to obtain the seaweed mud-based biochar. Through the steps of cleaning, alkali washing, ferric salt adsorption, pre-oxidation, pyrolysis and the like, impurities are effectively removed, the structure of the seaweed mud is improved, the mechanical property and conductivity of the seaweed mud are improved, and the seaweed mud can serve as an adsorption material or a fiber additive.

The invention relates to the technical field of battery material recovery, and particularly discloses a method for efficiently recovering lithium and ferrous sulfate heptahydrate in retired lithium iron phosphate through total leaching and green impurity removal. Comprising the following steps: 1, adding strong base and a carbon source into black powder, and calcining at high temperature in an inert atmosphere; step 2, dissolving in pure water after calcining, and carrying out suction filtration to obtain a lithium salt solution and ferrous hydroxide; 3, sulfuric acid is added into ferrous hydroxide for suction filtration, and graphite and a ferric salt solution are obtained; drying the ferric salt solution to obtain ferrous sulfate heptahydrate; step 4, adding alkali into the lithium salt solution to obtain a purified lithium salt solution; 5, introducing carbon dioxide into the purified lithium salt solution, and adding alkali to generate lithium carbonate precipitate; and 6, finally carrying out heat preservation, suction filtration, washing and drying to obtain a lithium carbonate finished product. The technical problems that in the prior art, a traditional decommissioned lithium iron phosphate battery grading recycling technology is complex in production process, more waste liquid pollution is generated, and the production cost is relatively high are solved.

The invention provides a lithium iron phosphate material and a preparation method thereof, a positive pole piece and a lithium ion battery, the preparation method comprises the following steps: dissolving a soluble iron salt and a ligand in water to form an iron-based complex so as to obtain a first solution; placing the carboxylated cellulose material in a first solution to form an iron-cellulose complex, so as to obtain a first mixed material; carrying out first separation and drying on the first mixed material to obtain an iron-cellulose complex; and mixing a lithium source, an iron source, a phosphorus source, a carbon source and the iron-cellulose complex in a solvent, heating, carrying out second separation on the obtained reaction mixture, and sintering the obtained solid to obtain the lithium iron phosphate material. According to the method, an iron-cellulose complex is used as a one-dimensional structure template, the lithium iron phosphate material with a one-to-many electron transport mechanism is successfully constructed, the conductivity, the rate capability and the working voltage of the material are improved, and the problem of capacity fading of the lithium iron phosphate material under high current density is further solved.

The invention provides a nitrogen modified iron-cobalt bimetallic catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The catalyst takes iron and cobalt as active components, and is prepared by adopting a coprecipitation-hydrothermal-step atmosphere heat treatment process: firstly, carrying out coprecipitation reaction on iron salt and cobalt salt, controlling the pH value to be 11 + / -0.5, carrying out aging and hydrothermal treatment, filtering, washing, drying and grinding to obtain a precursor; and calcining the precursor in a hydrogen-containing mixed atmosphere at 400-500 DEG C, and then calcining the precursor in an ammonia-containing mixed atmosphere at 450-600 DEG C to obtain the nitrogen surface modified iron-cobalt bimetallic catalyst. The catalyst is of a carrier-free iron-cobalt bimetallic structure, nitrogen atoms are embedded into alloy lattices or adsorbed on the surface in the form of pyridine nitrogen, pyrrole nitrogen or graphite nitrogen, and a Fe / Co-N high-activity interface is formed.

The invention discloses a preparation method and application of an iron-zirconium double-metal modified chitosan alkaline lignin aerogel material, and belongs to the technical field of aerogel material preparation. The method comprises the following steps: firstly dissolving chitosan to obtain a chitosan solution, adding alkaline lignin into the chitosan solution, then adding ferric salt and zircon salt to obtain an iron / zirconium / chitosan alkaline lignin mixed solution, and cross-linking the iron / zirconium / chitosan alkaline lignin mixed solution through a cross-linking agent to obtain the iron / zirconium / chitosan alkaline lignin composite material. And finally, freeze-drying to obtain the iron-zirconium double-metal modified chitosan alkaline lignin aerogel material. The method is simple and convenient in process, low in cost, green, environment-friendly and easy for large-scale production. The prepared aerogel material has the characteristics of a mesoporous material, is good in stability and mechanical property, has excellent performance in the aspect of adsorbing heavy metal and metalloid ions, can be regenerated and reused through desorption after adsorption, and can be applied to the fields of environmental governance and the like.

The invention provides a probiotic composition for improving immunity and a preparation method thereof, and belongs to the technical field of probiotics. The preparation method comprises the following steps: fermenting selenium-enriched nostoc sphaeroides through selenium-enriched saccharomycetes to extract selenium-enriched nostoc sphaeroides polysaccharide and selenium-enriched nostoc sphaeroides protein peptide, mixing with traditional Chinese medicine polysaccharide obtained by extracting astragalus membranaceus, rhodiola rosea, codonopsis pilosula and pseudo-ginseng, and reacting with ferric salt to prepare a polysaccharide-Fe / selenium compound; solid residues are mixed and fermented, and active protein peptide is prepared from the solid residues and selenium-rich nostoc sphaeroides protein peptide; the probiotic composition capable of improving immunity is prepared by extracting a polysaccharide-Fe / selenium compound and a polysaccharide-Fe / selenium compound through an organic solvent, extracting a permeate through an organic solvent to obtain an active component, collecting a bacterial liquid, mixing and embedding the bacterial liquid in the polysaccharide-Fe / selenium compound and sodium alginate, and uniformly mixing the bacterial liquid with the active protein peptide, the active component, taurine and ginsenoside Rg3, so that the probiotic composition capable of improving immunity can play good anti-inflammatory, anti-oxidation, immunoregulation, anti-tumor, anti-virus and other roles, and has a good application prospect. Wide application prospects are realized.

The invention discloses a flux-based preparation method of metal organic gel, which is characterized in that a series of metal organic gel materials are prepared by controlling proportion and temperature by taking ferric salt and any other mixed metal salts and organic ligands as raw materials, and the metal organic gel materials are directly used as an anode catalyst of a methanol fuel cell. The synthesis method is simple, the reproducibility is good, batch production can be achieved, and the prepared metal organic gel has the excellent methanol fuel cell anodic oxidation performance.

The invention relates to a porous nickel-iron alloy integrated electrode and a preparation method and application thereof, and belongs to the technical field of electrochemistry. The preparation method comprises the following steps: carrying out cleaning pretreatment on a stainless steel mesh substrate; then electro-deposition is carried out in a solution containing ferric salt and nickel salt, and a nickel-iron alloy layer is formed; carrying out secondary electro-deposition in a solution containing zinc salt, and carrying out high-temperature calcination treatment to obtain a nickel-iron-zinc alloy; and finally, the zinc component is removed through selective corrosion of an alkaline solution, and the nickel-iron alloy integrated electrode with the porous structure is formed on the stainless steel mesh. The method is controllable in process, and a porous structure which is high in specific surface area and beneficial to mass transfer is effectively constructed through step-by-step electro-deposition, calcination and corrosion treatment. The obtained integrated electrode can be directly used as an alkaline water electrolysis oxygen evolution reaction (OER) anode, shows high electrocatalytic activity and stability, and is suitable for the fields of water electrolysis hydrogen production and the like.

This invention belongs to the field of organic synthesis, specifically relating to an iron-catalyzed method for the disilylation of unactivated gem-difluoroallene compounds. This invention uses gem-difluoroallene compounds as reaction substrates, triethylsilyloborate as a silicon source, and an iron salt as a catalyst. In the presence of a base, ligands, and an organic solvent, the disilylation of activated gem-difluoroallene compounds is catalyzed. This invention achieves selective disilylation of activated gem-difluoroallene compounds via iron catalysis, and is simple, safe, reliable, and broad-spectrum.

The invention belongs to the technical field of photo-thermal evaporation materials, and discloses a composite photo-thermal material Fe / PANI / GF and a preparation method and application thereof. The preparation method of the composite photo-thermal material Fe / PANI / GF comprises the following steps: taking graphite felt (GF), and activating at high temperature to obtain activated graphite felt; uniformly depositing polyaniline on the surface of the activated graphite felt by adopting a constant current method or a cyclic voltammetry to obtain acid-doped polyaniline (PANIES / GF); and dipping the acid-doped polyaniline in a ferric salt solution or a ferrous salt solution, and dispersing and loading Fe on the PANI nano-particle layer through Fe-N coordination to obtain the composite photo-thermal material Fe / PANI / GF. The method shows wide application prospects in the fields of seawater desalination, high-salinity wastewater treatment, heat-assisted power generation, photo-thermal driven sterilization, soil remediation and the like, and an innovative scheme is provided for solving the problems that a traditional photo-thermal material is low in efficiency, poor in stability, high in cost and the like.

The invention provides a potassium-dissolving bacteria-iron-based potassium-containing nano material and a preparation method thereof, and belongs to a bio-fertilizer technology, and the preparation method comprises the following steps: dispersing soluble iron salt in water to obtain a solution A; dispersing a soluble phosphoric acid source and potassium salt in water to obtain a solution B; dispersing a stabilizer in water to obtain a solution C; simultaneously dropwise adding the solution A and the solution B into the solution C at the same speed, controlling the pH value to be 2.5-4.0 through alkali liquor, stirring for reaction, standing and aging to obtain the iron-based potassium-containing nano material; inoculating potassium-dissolving bacteria into a liquid culture medium, and carrying out enlarged culture to obtain a bacterial suspension; and mixing the bacterial suspension with the iron-based potassium-containing nano-material to obtain the potassium-dissolving bacteria-iron-based potassium-containing nano-material. The iron-based potassium-containing nano-material contains potassium, the iron-based potassium-containing nano-material and the potassium-dissolving bacteria act together to form a dual potassium supply mechanism that the potassium-dissolving bacteria decompose soil potassium and the iron-based potassium-containing nano-material releases potassium, and the effect is far better than that of single use of a microbial inoculum or a common potash fertilizer.

The invention discloses a preparation method and application of a FeCo-MOF derived CoFe2O4 / biochar composite material, and belongs to the technical field of antibiotic wastewater treatment. The method comprises the following steps: (1) dissolving terephthalic acid in DMF (Dimethyl Formamide) to form a solution A, dissolving ferric salt and cobalt salt in DMF to form a solution B, mixing the two solutions, reacting, centrifuging, washing, drying and grinding to obtain a FeCo-MOF material; and (2) mixing the FeCo-MOF material with peanut shells, grinding, calcining the obtained mixed powder in an N2 atmosphere, and then grinding to obtain the FeCo-MOF derived CoFe2O4 / biochar composite material. When the prepared composite material is used as a catalyst to degrade OFL in a PMS system, the degradation efficiency reaches 79.78%-89.89%, and the degradation rate constant reaches 0.094 min <-1 >-0.139 min <-1 >.

The invention discloses a preparation method and application of a Fe2O3 catalyst, and the preparation method of the Fe2O3 catalyst comprises the following steps: (1) dissolving a first ferric salt and a second ferric salt in water to form a solution, adding an organic solvent, adding alkali to adjust the pH value to 8-10, and placing at 150-170 DEG C for hydrothermal reaction; and (2) separating the solid in the step (1), and calcining the solid intermediate at 490-510 DEG C to obtain the Fe2O3 catalyst. According to the invention, two iron salts are adopted to form a precursor with a specific structure in a high-temperature and high-pressure water-organic solvent environment, and then the precursor is calcined at a specific temperature to obtain the Fe2O3 catalyst with high medium and low temperature activity and a wider active temperature window, and the Fe2O3 catalyst is suitable for flue gas denitration of glass furnaces, cement furnaces and the like.

The invention discloses a high-thermal-conductivity self-adhesion thermal interface material and a preparation method thereof, and is characterized in that polylipoic acid (polyTA) formed by high-temperature ring opening polymerization of lipoic acid (LA) is used as a dynamic reversible polymer matrix, the dynamic reversible polymer matrix has the characteristics of recoverability, self-healing and adhesion due to the inherent dynamic property of disulfide bonds, a spherical thermal conductive filler is modified by a polyphenol compound, and the high-thermal-conductivity self-adhesion thermal interface material is prepared. Polyhydroxy functional groups are given, the surface energy is reduced, meanwhile, certain viscosity is achieved, polyethylene glycol diacrylate is added to serve as a stabilizer, ferric iron salt is evenly stirred and mixed, the reaction time is controlled, and a stable cross-linked network system is constructed. Hydroxyl groups on the surface of the polyphenol-decorated heat-conducting filler and carboxyl groups in polylipoic acid are subjected to esterification reaction, and meanwhile, Fe < 3 + > and the carboxyl groups in the polylipoic acid form supramolecular coordination, so that uniform dispersion and stable bonding of the filler in a matrix are realized, the interface thermal resistance is remarkably reduced, and a continuous heat-conducting passage is formed. The preparation method of the thermal interface material is simple in process, and the thermal interface material has high thermal conductivity and self-adhesion, has soft elasticity and is suitable for various application fields needing efficient thermal conduction and interface thermal management.

The utility model discloses a mineral synergetic hypoxia biological reaction device which comprises a rack, a reactor fixed on the rack, a mineral feeding hopper fixed above an opening part of the reactor, a stirring mechanism arranged in the reactor, and a DO probe arranged in the middle of the reactor, an aeration device is arranged at the bottom of the reactor; an overflow port is formed in the upper part of the reactor and is communicated with the interior of the secondary sedimentation tank through an overflow pipe; the device further comprises a wastewater pool, supernate of the wastewater pool is pumped into the bottom of the reactor through a first peristaltic pump, and sludge on the lower portion of the reactor flows back to the secondary sedimentation pool through a second peristaltic pump. The utility model designs a mineral synergistic low-oxygen biological reaction device, a micro-aerobic biological system in the mineral synergistic low-oxygen biological reaction device can be used for removing high-concentration wastewater, and can maintain very high COD (Chemical Oxygen Demand) and ammonia nitrogen removal rate, the average COD removal rate is 97.1%, the average ammonia nitrogen removal rate is 87.3%, and the micro-aerobic biological reaction device can be used for treating the wastewater with high concentration. After iron salt, aluminum salt and other minerals are added, the phosphorus removal capacity of the micro-aerobic biological system can be enhanced.

The application provides a wastewater grading gradient arsenic removal device and a use method thereof, and belongs to the technical field of wastewater arsenic removal. The application solves the problem of unstable wastewater arsenic removal efficiency in the prior art. In the application, an iron salt feeding tank is connected with a premixing reaction device, a wastewater storage tank is connected with the premixing reaction device, the premixing reaction device is sequentially connected with a first-stage arsenic removal device and a second-stage arsenic removal device, the second-stage arsenic removal device is connected with the iron salt feeding tank, and the second-stage arsenic removal device is connected with an arsenic-removed liquid storage tank. The application comprises the following steps: adding iron salt and fresh water into an iron salt preparation tank, and mixing and reacting arsenic-containing wastewater in the wastewater storage tank with the iron salt solution in the premixing reaction device; controlling the addition amount of the iron salt solution in the second-stage arsenic removal device to perform a second-stage reaction; and storing the clear liquid after the reaction into the arsenic-removed liquid storage tank. The application achieves the purpose of grading and gradient wastewater arsenic removal, ensures that the effluent is environmentally friendly and meets the standard, and solves the problem of unstable wastewater arsenic removal efficiency.

The application discloses a fluorine removal agent and a preparation method thereof, and relates to the technical field of fluorine removal agents, and comprises the following components in parts by weight: 5-10 parts of an aluminum salt, 5-10 parts of an iron salt, 15-20 parts of a rare earth material, sodium citrate and beta-cyclodextrin; the addition amount of the sodium citrate is 5%-10% of the total mass of the aluminum salt, the iron salt and the rare earth material; and the addition amount of the beta-cyclodextrin is 30%-50% of the mass of the sodium citrate. Through the introduction of the synergistic system of sodium citrate and beta-cyclodextrin, the metal ion precipitation sequence is regulated, meanwhile, the beta-cyclodextrin captures competitive anions through molecular recognition and constructs a hydrogen bond network to block interference, and the combination of the microsphere type and the porous particle type further realizes dynamic directional transmission of pollutants and nuclear pore limited crystallization, and the active site distribution is reconstructed at the molecular level, so that a technical scheme with universality, economy and reliability is provided for the treatment of complex fluorine-containing wastewater.

The present application relates to a kind of iron salt reinforced heat-activated persulfate treatment organic wastewater method, the method includes the following steps: adding iron salt to wastewater, adjust the pH of solution to acidic, subsequently control the reaction temperature to be above 60 DEG C, and add persulfate to reaction solution to carry out reaction, after reaction, solid-liquid separation is carried out to reaction system, realize the complete removal of organic pollutants.The present application is based on heat-activated persulfate polymerization removal organic pollutants, introduce iron salt to strengthen the polymerization removal process of organic matter.Compared with prior art, by the synergistic effect of iron salt and persulfate, the utilization efficiency of oxidant and the removal rate of organic pollutants are greatly improved, while the generation of toxic intermediates is reduced, the application range of polymerization removal organic pollutants in water is widened, and the carbon emission problem caused by CO2 is avoided.

The application relates to a ternary metal nanocatalyst and a preparation method and application thereof, and relates to the field of catalytic chemistry. The specific steps of the method are as follows: soluble iron salt, soluble nickel salt and soluble aluminum salt are added into deionized water, and a carbon carrier is added as a substrate and is subjected to ultrasonic treatment. An alkaline solution containing sodium carbonate and sodium hydroxide is added dropwise into the prepared metal salt solution under vigorous stirring. The metal salt suspension is aged; the obtained solution is centrifuged, the solid is collected and vacuum dried and ground. The activated carbon loaded iron-nickel-aluminum ternary metal nanocatalyst can realize the complementary advantages among multiple components, and the synergistic mechanism makes the iron-nickel-aluminum catalyst exhibit better ammonia production rate and selectivity than single metal components in a neutral environment, and can be used for electrocatalytic nitrate reduction to prepare ammonia.

The present invention relates to a method for reducing emissions from manure, the method comprising adding 5.0-11.5 g of iron salt per 1 kg manure and adding 1.7-3.5 g of hydrogen peroxide (H2O2) per 1 kg manure. The invention also relates to a method for improving plant growth. Furthermore, the invention relates to a manure additive for reducing emissions from manure and improving plant growth comprising H2O2 and biochar. Furthermore, the invention relates to an organic fertilizer comprising manure and the manure additive.

The application relates to the technical field of organic synthesis, and discloses a preparation method of a hydrocarbyl carboxylic acid, which comprises the following steps: mixing a hydrocarbyl aldehyde, an oxidizing agent and a first metal salt to perform pre-reaction, and then mixing the reaction system obtained through the pre-reaction with a second metal salt to perform reaction; wherein the first metal salt is selected from at least one of a sodium salt, a potassium salt, a calcium salt, a lithium salt, an iron salt and a copper salt; and the second metal salt is selected from at least one of a zinc salt, a manganese salt, a cobalt salt, a palladium salt and a silver salt. The preparation method of the hydrocarbyl carboxylic acid can greatly shorten the reaction time, and improve the raw material conversion rate, the target product selectivity and the target product purity of the aldehyde oxidation acid reaction.