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61results about How to "High degree of mineralization" patented technology
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Ozonization water treatment method using manganese dioxide one-dimensional nano material as catalyst
InactiveCN101891297AIncreased degradation rateHigh degree of mineralizationMetal/metal-oxides/metal-hydroxide catalystsWater/sewage treatment by oxidationNano catalystWater treatment system
The invention relates to an ozonization water treatment method using a manganese dioxide one-dimensional nano material as a catalyst. The invention provides a preparation method and a using method of the nano-catalyst, which belong to the technical field of water treatment and environmental catalysis. Manganese dioxide nano rods are obtained by a simple and convenient hydrothermal method and the manganese dioxide nano rods serving as the catalyst are added into a phenol wastewater-containing ozonization water treatment system to contribute to the degradation of phenol organic pollutants, so that a novel ozonization water treatment method is provided on the basis. The obtained manganese dioxide one-dimensional nano material has the characteristics of small dimension, high dispersibility, high separability and wide application prospect in ozonization water treatment.
Owner:JIANGNAN UNIV
Catalytic particle electrode used for removing refractory organics and ammonia nitrogen from wastewater and preparation method and application thereof
ActiveCN104925913AEasy to prepareFast adsorption rateWater/sewage treatment using germicide/oligodynamic-processChemistryActivated carbon
The invention relates to the field of wastewater treatment, in particular to a catalytic particle electrode used for synchronously removing refractory organics and ammonia nitrogen from wastewater and a preparation method and application thereof. The electrode comprises shell activated carbon and metal components loaded on the shell activated carbon, wherein the particle size of the shell activated carbon is 1mm-5 mm, and the content of the metal components is 0.8wt%-2.5wt% the total mass of the activated carbon. Packing of the catalytic particle electrode has the advantages of being high in catalytic activity, low in price, easy to obtain, simple in preparation, high in COD and ammonia nitrogen degradation and removal efficiency, high in produced water mineralization degree, low in unit COD energy consumption and capable of being used continuously. Accordingly, the electrode is suitable for treatment of wastewater which is difficult to degrade biologically and contains high-concentration organic pollutants and high ammonia nitrogen.
Owner:BEIJING FORESTRY UNIVERSITY
Water ozonization treatment method by taking cerium oxide nanomaterial as catalyst
InactiveCN102249395AIncreased degradation rateGood catalytic degradation effectMetal/metal-oxides/metal-hydroxide catalystsWater/sewage treatment by oxidationDispersityPhenol
The invention discloses a water ozonization treatment method by taking a cerium oxide nanomaterial as a catalyst. According to the method, different cerium oxide nanomaterials are prepared by adjusting and controlling the synthesis reaction conditions, and are taken as catalysts for adding into a water ozonization treatment system of phenol containing waste water, so that the degradation of phenol organic pollutants is facilitated. On the basis, a novel water ozonization treatment method is provided. The method belongs to the technical fields of water treatment and environmental catalysis. The prepared cerium oxide nanomaterial has the characteristics of small size, high dispersity in a water solution system, easiness for separation and recovery and the like, and has a wide application prospect in the application of water ozonization treatment.
Owner:JIANGNAN UNIV
Ce-doped Fe-MOF ozone catalyst, and preparation and application thereof
PendingCN111715294AImprove catalytic ozone activityHigh degree of mineralizationOrganic-compounds/hydrides/coordination-complexes catalystsWater contaminantsPtru catalystCatalytic decomposition
The invention discloses a preparation method of a Ce-doped Fe-MOF ozone catalyst. The Ce-doped Fe-MOF ozone catalyst is formed by cerium ion-doped Fe-MOFs through hydrothermal or solvothermal self-assembling, wherein Fe-MOF is an iron-based metal organic framework material. According to the invention, Lewis acid site density of the surface of the Fe-MOF ozone catalyst is effectively adjusted by utilizing hetero-metal Ce, so the catalytic ozonation activity of the Fe-MOF is improved, the ozone adsorption and catalytic decomposition rate of a Fe-MOF catalytic material is promoted, more active oxygen species such as hydroxyl radicals are further generated, oxidative degradation of organic pollutants in water is enhanced, and the mineralization degree of the organic pollutants is remarkably improved.
Owner:ZHEJIANG SCI-TECH UNIV
Preparation method, product and application of ferrous doped Fe-MOFs Fenton-like catalyst
PendingCN112206828AHigh heterogeneous Fenton performanceQuick activationWater treatment compoundsOrganic-compounds/hydrides/coordination-complexes catalystsPtru catalystFerrous salts
The invention provides a preparation method, a product and application of a ferrous doped Fe-MOFs Fenton-like catalyst. The preparation method comprises the following steps: dissolving an organic ligand in a solvent to obtain an organic ligand solution; adding a mixed metal salt of a ferric salt and a ferrous salt into the organic ligand solution, and conducting uniform stirring to obtain a ferrous doped Fe-MOFs Fenton-like catalyst precursor mixed solution; and carrying out a solvothermal reaction on the mixed solution, and then carrying out solid-liquid separation and solid-phase drying to obtain the ferrous doped Fe-MOFs Fenton-like catalyst. The ferrous doped Fe-MOFs Fenton-like catalyst can improve Fenton-like mass transfer adsorption and catalytic decomposition rate and the efficiency of catalyzing Fenton-like oxidative degradation and mineralizing organic pollutants in water. The catalyst is applied to the field of organic wastewater pollution treatment, the catalytic Fenton-like activity of Fe-MOFs can be improved, the decomposition rate of Fenton-like reactions is promoted, and removal of organic pollutants in water is enhanced.
Owner:ZHEJIANG SCI-TECH UNIV
Ozonated water treatment method with nano ceria as catalyst
InactiveCN102491490AIncreased degradation rateHigh degree of mineralizationWater/sewage treatment by oxidationAir atmosphereNano catalyst
The invention provides a preparation method and a use method of a nano catalyst. The preparation method comprises the following steps of: chemically precipitating tervalent cerium ion (Ce<3+>) in the alkaline environment; and calcining at the air atmosphere to obtain a nano ceria sample. Obtained nano ceria shows good catalytic property in phenol degradation with ozonated water, on such a basis, a water treatment method based on nano ceria catalysis ozonization is built. The preparation method of the nano catalyst is simple; the obtained nano catalyst is uniform in structure, large in specific surface area and obvious in effect; a new application field of a rare earth material in ozonization is developed; and the obtained nano catalyst has a wide application prospect in the aspects of water treatment and environment catalysis.
Owner:JIANGNAN UNIV
Mimic polypeptide of non-collagen protein and application of the mimic peptide in biomimetic mineralization
The invention discloses mimic polypeptide of non-collagen protein and application of the mimic polypeptide in biomimetic mineralization. An amino acid sequence of the polypeptide in the invention is represented as SEQ ID NO:1. Function and effect of polypeptide mimic soluble non-collagen protein (BSP and DMP1) in the invention are as follows: controlling deposition and growth of mineral in I type collagen, further simulating formation processes of human body natural hard tissues, promoting mineral nucleation and growth, increasing combination capability of the mineral and collagen fiber, raising mineralization degree of the mineral especially hydroxy apatite in the I type collagen, thereby promoting restoration of bone and dentine.
Owner:TSINGHUA UNIV
Preparation method and application of tetracycline-polluted water body restoring material
ActiveCN107321355AImprove removal efficiencyReduce reunionRare earth metal oxides/hydroxidesMaterial nanotechnologyOxideRestoration method
The invention discloses a preparation method and application of a tetracycline-polluted water body restoring material. A preparation method of nanometer cerium dioxide comprises the following steps of (1) adding cerium nitrate and surfactant into water, mixing and stirring, so as to obtain a mixed solution A; (2) adding an ammonia carbonate solution into the mixed solution A, and stirring, so as to obtain a mixed solution B; (3) filtering the mixed solution B, washing and drying the obtained precipitate, calcining, and grinding into powder, so as to obtain the nanometer cerium dioxide. The invention also discloses a preparation method of the nanometer FeO@CeO2 (ferrous oxide@cerium dioxide) by using the nanometer cerium dioxide, and a restoration method of the tetracycline-polluted water body by using the nanometer FeO@CeO2. A heterogeneous Feton technique using the FeO@CeO2 as a catalyst is proposed to prepare the FeO@CeO2 to be applied into the restoring of the tetracycline pollution in the water body, so that the reaction activity is improved, the mineralizing degree of the tetracycline is improved, and the risk of secondary pollution is reduced.
Owner:广州润方环保科技股份有限公司
Millimeter level mesoporous ozone oxidation catalyst and preparation and application method thereof
ActiveCN106944027AHigh catalytic activityGood long-lasting activitySpecific water treatment objectivesWater contaminantsMicrosphereTitanium zirconium
The invention discloses a millimeter level mesoporous ozone oxidation catalyst and preparation and an application method thereof, belongs to the technical field of water processing, and aims to solve the problems that the hydrodynamic performance of a conventional ozone oxidation catalyst is bad, the catalytic efficiency is low, and the stability is insufficient. The millimeter level mesoporous ozone oxidation catalyst comprises cerium, titanium, zirconium, and oxygen, is a millimeter level mesoporous spherical particle, has a unique crystal structure, at the same time, has the advantages of durable and stable catalytic activity, excellent hydrodynamic characteristics and pore structure, high compression strength, acid / alkali resistance, ligand stability, oxidation resistance, and thermal stability, and can prominently improve the mineralization degree of ozone oxidation. The valence composition of active components is not changed after repeated use. The preparation method comprises the following steps: preparing millimeter level mesoporous titanium-zirconium composite microspheres by a calcium alginate template method, and then combining cerium and the titanium-zirconium compound by an impregnation method. The provided catalyst can be applied to fixed bed reactor / fluidized bed reactor wastewater treatment, and can be thermally regenerated when pollutants are accumulated on the catalyst.
Owner:NANJING UNIV
Method for generating free radicals through activated peroxymonosulfate to treat landfill leachate
ActiveCN107117776AChemically stableEasy to store and transportWater treatment compoundsWater contaminantsFenton reactionSulfate
The invention discloses a method for generating free radicals through activated peroxymonosulfate to treat landfill leachate and relates to a treatment method of the landfill leachate. The treatment method comprises the steps of adding crushed and sieved secondary iron mineral and peroxymonosulfate to the landfill leachate; stirring, reacting and then precipitating; and discharging effluent and then carrying out biological treatment. According to the method, an organic matter and the peroxymonosulfate can be adsorbed on the surface of the secondary iron mineral, the peroxymonosulfate and Fe<3+> on the surface of the mineral are subjected to Fenton-like reaction to generate SO4.<-> and the organic matter adsorbed on the surface of the mineral is degraded. The method has the characteristics that the treatment efficiency is high, a toxic and harmful by-product is not generated, the cost of the secondary iron mineral and the peroxymonosulfate is low, the method is easy to operate and the influences of water body conditions on reaction are small. The method is a landfill leachate treatment method integrating heavy metal removal and organic matter degradation.
Owner:HARBIN UNIV OF SCI & TECH
Method for processing reverse-osmosis concentrated water through catalytic ozone oxidation
ActiveCN104418423AIncreased degradation rateHigh degree of mineralizationCatalyst carriersWater treatment compoundsCooking & bakingReverse osmosis
A related method for processing reverse-osmosis concentrated water through catalytic ozone oxidation: dipping peanut shell powder in a phosphoric acid solution with the concentration of 60% according to the solid-liquid ratio of 1:1-1:3, transferring the material solution to a crucible for activation, cooling, washing with a hydrochloric acid solution with the concentration of 1%, washing with deionized water to get a pH value of 7, putting in a baking oven, baking at 105 DEG C to obtain a constant weight, performing grinding or ball-milling crushing and screening; dipping peanut shell activated carbon in a transition metal ion solution with the mass concentration of 0.1-10% according to a solid-liquid ratio of 1:1-1:10, baking to dry, roasting and grinding; adding into an ozone oxidation sewage processing system containing the reverse-osmosis concentrated water, and controlling the ozone oxidation sewage processing temperature to be 5-35 DEG C; and after processing is finished, separating out the peanut-shell-active-carbon-supported metal ion catalyst for next time of the catalytic process. The catalyst employed in the method is abundant in channel, large in specific surface area and more in surface active group, and has relatively strong adsorption and catalytic effects on organic pollutants in sewage.
Owner:PETROCHINA CO LTD
Preparation method and application for graphene multi-metal composite material
InactiveCN110015746AExcellent organic matter degradation abilityProcessing speedMaterial nanotechnologyWater contaminantsSolventCvd graphene
The invention discloses a preparation method and an application for a graphene multi-metal composite material, belonging to the technical field of graphene multi-metal composite materials. The preparation method provided by the invention comprises the following steps: adding graphene oxide into a solvent, and carrying out ultrasonic dispersion treatment for 1 to 2 h so as to obtain a graphene oxide dispersion; dissolving a reducing agent, alkali and metal salt into the graphene oxide dispersion so as to obtain a mixed solution; and subjecting the mixed solution to a high-temperature hydrothermal reaction for 12 to 24 h, carrying out cooling to a room temperature, carrying out centrifuging treatment, removing a supernatant liquid, washing a solid with deionized water, and carrying out drying so as to obtain the graphene multi-metal composite material. According to the invention, by utilization of adjustment and control of the loading concentration and the particle size of a nano-sized multi-metal compound, nano-sized catalytic sites are loaded onto the surface of graphene, so a polymetallic compound loaded by a material has the advantages of high dispersion, uniform morphology, insusceptibility to agglomeration and reinforced catalytic performance; and activation of peroxides and inhibition of generation of disinfection by-products can be simultaneously realized, and the degradation ability of a disinfectant to organic matters is greatly enhanced.
Owner:SHANGHAI UNIV
Red mud-based heterogeneous catalyst, preparation method and pollutant degradation method
ActiveCN111974395AReduce catalytic activityHigh catalytic activityWater contaminantsMetal/metal-oxides/metal-hydroxide catalystsPtru catalystCarbonization
The invention discloses a red mud-based heterogeneous catalyst, a preparation method and a pollutant degradation method, belongs to the technical field of heterogeneous catalysts, and solves the problems of high cost and low degradation efficiency of a catalyst for organic pollutant degradation in the prior art. The red mud-based heterogeneous catalyst is prepared by carbonization reaction of redmud and biomass, and the mass ratio of the red mud to the biomass is 5: 1-1: 2. The preparation method includes the steps: uniformly mixing the red mud and the biomass; performing heating carbonization reaction on mixture; and sequentially cooling, cleaning and drying reaction products to obtain the red mud-based heterogeneous catalyst. The degradation method includes the steps: mixing the red mud-based heterogeneous catalyst, organic pollutant water solution and oxidizing agents; and performing stirring reaction on the mixture to degrade organic pollutants in the organic pollutant water solution. The red mud-based heterogeneous catalyst, the preparation method and the pollutant degradation method can be used for degrading the organic pollutants.
Owner:ZHENGZHOU UNIV
Flotation column
The invention discloses a flotation column which comprises a flotation column body (5) and a bubble generator (4), wherein one end of a spiral pipeline (3) is connected with a feed opening (1), an air inlet (2) is arranged beside the feed opening (1), the other end of the spiral pipeline (3) is connected with the upper part of the flotation column body (5), the bubble generator (4) is connected with the lower end of the flotation column body (5) by adopting an external inserting mode, and both the air inlet (2) and the bubble generator (4) are connected with an air pump (6). An ore slurry can be fully sheared and mineralized by the flotation column by utilizing the spiral pipeline, the generated bubbles are superfine and have better dispersion effect, and the flotation column has the characteristics of simple structure, stable operation, difficult blockage, good mineralization effect and the like, can be suitable for floating a plurality of metals or nonmetals, is a new generation of high-efficiency flotation column and can be applied to multiple fields of metal mines, coal, environmental protection and the like.
Owner:CENT SOUTH UNIV
Method for degrading naphthalene in soil through combination of microwave induction and catalytic oxidation
ActiveCN110961450AImprove adsorption capacityOxidative decomposition is goodContaminated soil reclamationPolycyclic aromatic hydrocarbonPtru catalyst
The invention discloses a method for degrading naphthalene in soil through the combination of microwave induction and catalytic oxidation. The method is characterized by comprising the following steps: mixing 5g of naphthalene-polluted soil sample, 10-50mg of catalyst and 0.6-1.0 g of distilled water, adding the above materials into a polytetrafluoroethylene reactor, and degrading the materials ina microwave digestion instrument for degradation, wherein the concentration of the soil sample is that 10mg of naphthalene is contained in every 1kg of soil, the microwave frequency is 2450MHz, the output power is 400-700W, the output pressure is 0.2 Mpa, and the microwave induction treatment time is 2-10min. A single microwave induction method and a catalytic oxidation method are combined, and the purpose of degrading polycyclic aromatic hydrocarbon in the soil through the combination of microwave induction and catalytic oxidation. The method is simple and easy to implement and has a good degradation effect on the refractory typical pollutant polycyclic aromatic hydrocarbon naphthalene in the soil.
Owner:上海达恩贝拉环境科技发展有限公司
Cerium-titanium oxide mesoporous millimeter-sphere ozone catalyst and preparation method and application thereof
ActiveCN109663589AHigh degree of mineralizationHigh catalytic activityWater contaminantsMetal/metal-oxides/metal-hydroxide catalystsFluidized bedFixed bed
The invention provides a cerium-titanium oxide mesoporous millimeter-sphere ozone catalyst and a preparation method and an application thereof, and belongs to the technical field of water treatment. The cerium titanium oxide catalyst is a millimeter spherical particle with mesoporous structure, has high catalytic activity, excellent hydrodynamic properties, suitable pore structure, compressive mechanical strength and stability, which can significantly improve the mineralization rate of ozonation degradation of organic pollutants. The preparation method of the cerium-titanium oxide mesoporous millimeter-sphere ozone catalyst refers to an economic preparation method suitable for cheap inorganic metal salts as raw materials, the preparation cost is greatly reduced comparing with the prior artof organometallic alkoxide process, and the preparation method of the cerium-titanium oxide mesoporous millimeter-sphere ozone catalyst is green environmental and economic. The cerium-titanium oxidemesoporous millimeter-sphere ozone catalyst can be used for catalytic ozonation treatment of wastewater in a fixed bed or a fluidized bed reactor.
Owner:NANJING UNIV
Malodorous gas processing system and processing method thereof
InactiveCN101496995ACompletely degradedPromote absorptionDispersed particle separationDeodrantsUltravioletEngineering
The invention in particular relates to a system and a method for treating foul gas. The treating system comprises that: an ultraviolet strip lamp (5) and a rectification photocatalytic plate (4) are arranged inside a treating tank (7); the ultraviolet strip lamp (5) vertically runs through the rectification photocatalytic plate (4); the inner wall of the treating tank (7) and the rectification photocatalytic plate (4) are evenly coated with nanometer level TiO2; the inside of the treating tank (7) is provided with active carbon fibre (2); a humidifier (6) is communicated with the treating tank (7) through a pipeline; and a draught fan (1) is communicated with a wind inlet of the treating tank (7) through a wind feeding pipe. The relative humidity of the treating tank (7) of the treating system is between 50 and 90 percent; the flow speed of the foul gas in the treating tank (7) is between 0.2 and 0.8 m / s; the ultraviolet irradiation strength of the ultraviolet strip lamp (5) is between 50 and 100 W / m; the specific surface area of the active carbon fibre (2) is between 900 and 1,600 m / g; and the active carbon fibre (2) is embedded or is not embedded into nanometer level TiO2 powder. The system and the method have the characteristics of simple process, reliable operation, high efficiency and no secondary pollution.
Owner:WUHAN UNIV OF SCI & TECH
Ozonized water treatment method taking nano zinc oxide as catalyst
InactiveCN101885533AIncreased degradation rateHigh degree of mineralizationMetal/metal-oxides/metal-hydroxide catalystsWater/sewage treatment by oxidationNano catalystWater treatment system
The invention discloses an ozonized water treatment method taking nano zinc oxide as a catalyst, provides a preparation method and a using method for a nano catalyst, and belongs to the technical field of water treatment and environmental catalysis. The novel ozonized water treatment method is provided based on obtaining the nano zinc oxide by a simple and convenient sedimentation method and adding the nano zinc oxide serving as the catalyst into an ozonized water treatment system containing phenolic wastewater to promote the degradation of phenolic organic pollutants. The nano zinc oxide has the characteristics of small dimension, good dispersion and good stability, and has broad application prospect in ozonized water treatment.
Owner:JIANGNAN UNIV
Method for treating washing wastewater of coal chemical industry
ActiveCN110759578AHigh densityIncrease settling velocityWater/sewage treatment by irradiationWater contaminantsOrganic matter mineralizationSulfate radicals
The invention discloses a method for treating washing wastewater of coal chemical industry. The method comprises the following steps: firstly, carrying out partial removal on tar, suspended impuritiesand other macromolecular substances in the wastewater through a magnetic flocculation precipitation strengthening flocculation effect, then carrying out ultraviolet activated persulfate oxidation toexcite generation of sulfate radicals, effectively carrying out ring opening on refractory organic matters such as pyridine and quinoline to be decomposed into easily degradable substances such as allyl alcohol and acetamide, and thus improving the removal rate of the refractory organic matters and improving the biodegradability of the wastewater; reusing an photoelectric-Fenton oxidation method,producing a Fenton reagent by using an electrochemical method to treat the wastewater, and meanwhile, introducing ultraviolet light, wherein the ultraviolet light and Fe<2+> have a synergistic effecton the catalytic decomposition of H2O2, so that the decomposition rate is greatly improved, the refractory organic matters can be effectively treated, the degree of mineralization is high, secondary pollution cannot be generated, the operation is simple, the control parameters are only voltage and current, and the automatic control can be conveniently realized.
Owner:神美科技有限公司
N-doped graphene-cerium oxide composite catalyst and application of N-doped graphene-cerium oxide composite catalyst to treatment of degradation-resistant acid wastewater
ActiveCN108246329AEfficient degradationIncrease profitWater contaminantsCatalyst activation/preparationDoped grapheneStrong acids
The invention discloses an N-doped graphene-cerium oxide composite catalyst. A preparation method of the N-doped graphene-cerium oxide composite catalyst comprises the following steps: (1) adding a CeO2 precursor, a carbon source and a nitrogen source into water, stirring evenly, and drying; (2) grinding a dried solid, roasting under the protection of nitrogen gas, cooling to obtain the N-doped graphene-cerium oxide composite catalyst. The invention further discloses the application of the N-doped graphene-cerium oxide composite catalyst to the treatment of degradation-resistant acid wastewater. The N-doped graphene-cerium oxide composite catalyst can effectively catalyze the oxidation of ozone under the acid or strong acid condition to degrade an organic pollutant.
Owner:HANGZHOU CHENGJIE ENVIRONMENTAL PROTECTION
Split type electro-Fenton device and method for efficiently processing coal chemical industry wastewater through device
ActiveCN109650613AReduce the content of polluting materialsPromote precipitationWater/sewage treatment by centrifugal separationWater treatment parameter controlOrganic matter mineralizationElectrolysis
The invention discloses a split type electro-Fenton device and a method for efficiently processing coal chemical industry wastewater through the device. The split type electro-Fenton device comprisesa preprocessing tank, an electrolytic reaction tank, a precipitation tank and a power unit. The preprocessing tank comprises a filtering tank and an oil and sulphur removal cavity. A hydrocyclone andan annular oil collecting pipe are arranged in the oil and sulphur removal cavity. The electrolytic reaction tank comprises an electrolysis cavity and a Fenton reaction cavity. An electrode plate is arranged in the electrolysis cavity. A pH detecting device and a stirring device are arranged in the Fenton reaction cavity. The power unit provides power for the hydrocyclone, the pH detecting deviceand the stirring device. The split type electro-Fenton device is simple in structure, high in organic matter mineralization degree, low in energy consumption and good in decomposition and removal effect on pyridine and heterocycle type organic pollutants.
Owner:NANJING UNIV +1
Electro-fenton cathode with active hydrogen introduced and preparation method and application thereof
ActiveCN109518234AExtension of timeStable structureWater treatment compoundsWater contaminantsHeterojunctionAntibiotic Y
The invention provides an electro-fenton cathode with active hydrogen introduced and a preparation method and application thereof. The electro-fenton cathode with the active hydrogen introduced comprises a substrate electrode, and a Ni / NiO heterojunction loaded on the surface of the substrate electrode, and the Ni / NiO heterojunction is composed of metal nickel formed in an electroplating mode andan oxidation layer formed by the metal nickel. Compared with the prior art, the structure Ni / NiO heterojunction with the active hydrogen introduced is loaded on the surface of the substrate electrode,the existence time of the active hydrogen on the electro-fenton cathode is prolonged, accordingly, Fe<3+> can be reduced under neutral conditions, reduction of iron ions in homogeneous fenton reaction is improved, and antibiotics and other organic matter can be mineralized more thoroughly; and in addition, the Ni / NiO heterojunction hardly reacts with a solution and does not participate in reaction under neutral conditions, and accordingly, the electro-fenton cathode with the active hydrogen introduced is stable in structure, good in circulation stability and capable of operating for a long time.
Owner:UNIV OF SCI & TECH OF CHINA
Spherical activated carbon ozone catalyst with high alkalinity on surface and application of spherical activated carbon ozone catalyst
ActiveCN110743524AHigh degree of mineralizationHigh catalytic activityPhysical/chemical process catalystsWater contaminantsActivated carbonPtru catalyst
The invention provides a spherical activated carbon ozone catalyst with high alkalinity on the surface. The spherical activated carbon ozone catalyst is prepared by the following steps: mixing asphaltof a low softening point and an oxidation accelerator with a Lewis catalyst, adding a surfactant and a water suspension, performing sphere formation, performing carbonization and activation so as toobtain a mesoporous spherical activated carbon catalyst, further adding an alkali liquid, performing sufficient mixing and modification, uniformly mixing the components through gradient temperature change, performing washing till the pH value is stable, performing vacuum drying, so as to obtain mesoporous spherical activated carbon with high alkalinity on the surface. The material is high in catalytic activity, is capable of significantly improving the efficiency of converting ozone into hydroxyl radicals and promoting mineralization of refractory pollutants, is good in stability and can maintain high catalytic activity in long-term use. The catalyst can be applied to treatment on organic pollutants, and is beneficial to adsorption and intragranular diffusion and mass transfer of pollutants, and the degradation efficiency can be improved.
Owner:EAST CHINA UNIV OF SCI & TECH +2
Pretreatment method of waste emulsion
InactiveCN111470679AHigh degree of mineralizationEfficient removalWater treatment parameter controlWater contaminantsPretreatment methodElectrolysis
Owner:浙江美纳环保科技有限公司
Method for ozonizing phenol wastewater by taking ceramic powder material as catalyst
InactiveCN101870513AIncreased degradation rateHigh degree of mineralizationWater/sewage treatment by oxidationWater treatment systemCeramic molding
The invention relates to a method for ozonizing phenol wastewater by taking a ceramic powder material as a catalyst, and belongs to the technical field of environmental protection and environmental catalysis. The ceramic powder material serving as the catalyst is added into an ozonization water treatment system which contains the phenol wastewater to promote the degradation of phenol organic pollutants. The invention provides a novel ozonization water treatment method. Compared with a ceramic molding material, the ceramic powder material has the characteristics of small scale, high dispersibility, and wide application prospect in ozonization water treatment.
Owner:JIANGNAN UNIV
Special organic fertilizer for breeding seedlings of precious timber species
InactiveCN106892776ALow costVersatileExcrement fertilisersBioloigcal waste fertilisersSoil propertiesInorganic compound
The invention relates to a special organic fertilizer for breeding seedlings of precious timber species. The mixing mass ratio of the organic fertilizer to a compound fertilizer is 0.5%, decomposed bagasse and decomposed sheep manure are respectively ground and bunched after dried in the sun, and then the ground bagasse and sheep manure are uniformly mixed according to a volume ratio of 1:1, an inorganic compound fertilizer with the ratio of N to P to K being 15%:15%:15% is added, and then a special matrix fertilizer is prepared. The novel fertilizer and a formula of the fertilizer belong to an independent innovation product which is a slow-release organic and inorganic compound fertilizer, and the fertilizer has low cost, multiple functions and good effects, and can scientifically regulate the vegetative growth and reproductive growth of the seedlings, improve physical and chemical properties of soil, perfect the soil structure, form micro-aggregates, and have strong cation exchange force and excellent air permeability, water holding capacity and water permeability. The organic fertilizer disclosed by the invention is complete in nutrition and capable of improving soil properties, and has easily adjusted nutrient ratios, high nutrient supply rate, high mineralization degree and long fertilizer supply performance and time.
Owner:YUNNAN ACAD OF FORESTRY
BiOCl/graphite-like phase carbon nitride composite photocatalyst with (010) crystal face exposed and preparation method and application thereof
ActiveCN109622012AEasy to separateImprove photocatalytic activityPhysical/chemical process catalystsWater/sewage treatment by irradiationPhotocatalytic reactionCarbon nitride
The invention provides a BiOCl / graphite-like phase carbon nitride composite photocatalyst with a (010) crystal face exposed and a preparation method and application thereof. A light composite method is adopted, BiOCl is illuminated to generate electrons on the (010) crystal face, and holes are formed in the (100) and (001) crystal faces. The holes attract the layered structures g-C3N4 with negative charge through static electricity, the layered structures g-C3N4 are loaded on the (100) and (001) crystal faces with P4 / nmm (129) BiOCl as tetragonal phases and space point groups, and the BiOCl (010) crystal face is exposed to form the BiOCl / g-C3N4 composite photocatalyst with the (010) crystal face exposed. The formed BiOCl / g-C3N4 composite photocatalyst with the (010) crystal face exposed has relatively high photocatalytic activity.
Owner:SHAANXI UNIV OF SCI & TECH
Ag/BiOCl-OVs composite photocatalyst and preparation method and application thereof
ActiveCN111389422AImprove reducibilityEasy to separatePhysical/chemical process catalystsWater/sewage treatment by irradiationOxygen vacancyPhysical chemistry
The invention provides an Ag / BiOCl-OVs composite photocatalyst and a preparation method and application thereof. The method comprises the steps: step 1, dissovling BiOCl-OVs powder with exposed (001)crystal faces and Ag (NO3) 3 in deionized water according to the mass ratio of 1: (0.05-0.3), and obtaining a mixed system; step 2, carrying out a reduction reaction on the mixed system under a lightsource to obtain a reaction solution; and step 3, separating the product in the reaction solution, and drying to obtain the Ag / BiOCl-OVs composite photocatalyst. According to the preparation method, Ag < + > attached to oxygen vacancies is reduced into Ag by adopting an illumination reduction method, electrons of Ag can be transferred to BiOCl, the Fermi level of BiOCl is increased, and the reduction capability of photo-induced electrons is improved so that the composite photocatalyst can be used for effectively degrading an organic pollutant rhodamine B.
Owner:SHAANXI UNIV OF SCI & TECH
A kind of electric Fenton cathode introducing active hydrogen and its preparation method and application
ActiveCN109518234BExtension of timeStable structureWater treatment compoundsWater contaminantsFenton reactionOrganic matter
Owner:UNIV OF SCI & TECH OF CHINA
Ozone oxidation catalyst for wastewater treatment and application method thereof
ActiveCN114011426AIncrease the areaLarge hole volumeWater contaminantsMetal/metal-oxides/metal-hydroxide catalystsPtru catalystPhosphite salt
The invention relates to an ozone oxidation catalyst for wastewater treatment and an application method thereof, and belongs to the technical field of water treatment. The catalyst provided by the invention has efficient and stable catalytic activity, excellent fluid mechanical properties, rich pore structures, relatively high mechanical strength, proper variable valence activity, adsorption activity, catalytic ozonolysis activity and catalytic ozonolysis degradation activity, is suitable for reactors such as a bubble tower, and can be produced on a large scale. Compared with single ozone oxidation or ceramsite-based catalysts, the catalyst has the advantages that the actual wastewater organic pollutant degradation efficiency is greatly improved, the catalyst can be used for strengthening complex-state heavy metal ozone oxidation complex breaking and free heavy metal release, the efficiency of converting organophosphorus, hypophosphite, phosphite and the like into orthophosphate through ozone oxidation can be improved, the operation effect is stable, and the catalyst is suitable for advanced treatment of industrial wastewater and industrial park wastewater.
Owner:NANJING UNIV
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