572 results about "Catalytic degradation" patented technology

The invention relates to the technical field of industrial wastewater deep purification, and discloses an industrial wastewater deep purification system based on nano catalytic membrane separation, which comprises a pretreatment module, a catalytic degradation module, a membrane separation module, an intelligent control module and a regeneration maintenance module which are sequentially connected according to a treatment flow, the pretreatment module adjusts the water quality of inlet water to a range suitable for subsequent treatment through pH adjustment and suspended matter interception, that is, the pH is 2-11, and the turbidity is less than or equal to 50NTU; the catalytic degradation module is used for decomposing organic pollutants and mineralizing refractory substances under the excitation of ultraviolet / visible light by utilizing the photocatalytic characteristic of a nano catalytic membrane. The TiO2 / WO3 heterojunction nano catalytic membrane is adopted, so that deep oxidation of refractory pollutants such as phenol and sulfonamide antibiotics is realized, finally, the COD removal rate of 98.7% is achieved, and compared with a traditional photocatalytic process, the energy consumption is reduced by 54%.

The invention provides a wastewater advanced oxidation catalyst and a preparation method and application thereof, the wastewater advanced oxidation catalyst is of a core-shell structure, the core is activated carbon containing copper oxide and optional ferrous sulfide, and the shell is a silicon oxide-aluminum oxide compound containing nano ferrous sulfide. The invention further provides a preparation method of the wastewater advanced oxidation catalyst and application of the wastewater advanced oxidation catalyst in organic wastewater treatment. The wastewater advanced oxidation catalyst has the characteristics of high catalytic degradation capability on organic pollutants and the like, solves the problem of copper dissolution, and improves the long-term effectiveness of the catalyst.

The invention provides a method for promoting acquisition of clean fuel by light / sound concerted catalytic degradation of waste plastics and upgrading and conversion thereof, which comprises the following steps: uniformly mixing g-C3N4, cadmium acetate and thioacetamide according to a predetermined proportion, pouring into a reaction kettle, placing in a high-temperature oven for a predetermined time, centrifuging, cleaning and drying to obtain a catalyst, the method comprises the following steps: loading a catalyst on the surface of aerogel, hydrogel or non-woven fabric to obtain an MTSJA-loaded catalyst, treating waste plastic with NaOH, adding the MTSJA-loaded catalyst, stirring under irradiation of a xenon lamp, starting ultrasound for reaction, and carrying out light / sound synergistic catalytic degradation on the waste plastic. According to the method, energy consumption is not needed, toxic and harmful gas is not generated, the purposes of energy conservation and environmental protection can be achieved, meanwhile, carbon dioxide in water can be catalytically reduced to generate clean energy such as methane in the process of degrading the waste plastic, and further obtaining of the energy is promoted.

The invention relates to a method for catalytically degrading a polyester material by using an ionic liquid and application of the polyester material, and mainly solves the technical problems of high energy consumption, environment unfriendliness and complex process in polyester material recovery research in the prior art. According to the technical scheme, the novel method for catalytically degrading the polyester material through the ionic liquid comprises the steps that the ionic liquid is used as a catalyst, diol is used as an alcoholysis agent, polyester is catalytically degraded, and the ionic liquid has the following general formula: A + B-(I); in the formula, A < + > is an organic alkali cation, and B <-> is an alkoxy anion, the problem is well solved, and the method can be applied to polyester recovery industry.

The invention belongs to the field of wastewater treatment, and particularly relates to a method for co-treating high-salt degradation-resistant organic wastewater based on electro-polymerization of in-situ activated chlorine free radicals of a penetrating electrode. The method comprises the following steps: by taking a penetrating electrode as an anode, sequentially and alternately arranging the anode and the cathode to form an electrode group, placing the electrode group in a reaction tank, connecting the cathode and the anode of the electrode group with a direct-current power supply, and carrying out electrocatalytic degradation on the high-salt degradation-resistant organic wastewater to be treated in the reaction tank; the transmission type electrode comprises a porous conductive substrate and a metal oxide catalytic layer loaded on the surface of the porous conductive substrate. Under the action of low current, the metal oxide catalytic layer of the anode activates chloride ions in the wastewater in situ to generate chlorine free radicals, and refractory pollutants are degraded through the action of electrocatalytic oxidation; meanwhile, a low-current polymerization reaction is initiated to generate a polymer to adsorb pollutants, so that electrocatalytic oxidation and polymerization synchronous synergistic decontamination is realized.

The invention provides a double-defect-modified porous carbon nitride photocatalyst prepared by one step from ferromolybdic acid as well as a preparation method and application of the double-defect-modified porous carbon nitride photocatalyst. The catalyst is of a thin-layer porous structure, so that the specific surface area of the catalyst is increased, and more surface active sites are provided for adsorption and reaction; compared with pure g-C3N4, the visible light absorption intensity of the catalyst is obviously enhanced, due to the existence of surface N vacancies and defects formed by doping of metal oxides, effective charge separation is enhanced, the photon-generated carrier separation and transfer capacity is higher under visible light irradiation, and the catalytic activity is remarkably improved. When the photocatalyst is applied to degradation of tetracycline antibiotic pollutants, photocatalytic degradation of tetracycline can be realized only under the condition of low-power 5W LED visible light, the preparation process is simple, and the cost is lower.

The invention relates to a method and a device for preparing piezoelectric catalytic degradation PFAS nano barium titanate from sludge graded extracts, and belongs to the technical field of sludge utilization environments. The method comprises the following steps: uniformly mixing fresh sludge and modified cation resin, and extracting a cation resin extracting solution to obtain the cation resin extracting solution and cation sludge; uniformly mixing the cation mud and the modified anion resin, and extracting an anion resin extracting solution to obtain the anion resin extracting solution and the cation mud; mixing the sludge and alkali for reaction to obtain an alkali extracting solution and extraction residues; mixing barium salt with the cation resin extracting solution to obtain a barium complexing solution, and mixing titanium salt with the anion resin extracting solution to obtain a titanium complexing solution; and mixing the barium complexing solution with the same volume of the alkali extracting solution, then adding the titanium complexing solution with the same molar ratio, heating, drying and calcining to obtain the piezoelectric catalytic degradation PFAS nano barium titanate. According to the method, multi-stage extraction can be carried out according to application property requirements, extraction is sufficient, the comprehensive utilization rate of sludge is high, dispersity is good, the particle size is small, piezoelectric catalysis performance is high, and synthesis cost is low.

The invention relates to a preparation method and application of a composite piezoelectric catalytic material NaNbO3-coated BiFeO3 for rapidly degrading antibiotics, NaNbO3 is flaky crystal grains with [001] crystallographic orientation prepared by a two-step molten salt method, and BiFeO3 is micro-nano particles prepared by a coprecipitation method. Composite micro-nano BiFeO3 powder and [001] oriented NaNbO3 flaky grains form a heterojunction, conversion of mechanical energy and electric energy of the material is achieved under the ultrasonic vibration condition, inductive charges are generated on the surface of the material, and photon-generated carriers move reversely under driving of a built-in electric field. According to the invention, the piezoelectric catalytic degradation capability of the BiFeO3 and NaNbO3 composite piezoelectric catalytic materials with different proportions on four antibiotics, namely oxytetracycline, levofloxacin, carbamazepine and paracetamol in different time periods is researched. When the mass ratio of the BiFeO3 to the NaNbO3 composite material is 1: 3, the oxytetracycline degradation rate within 30 min can reach 78.2%, the oxytetracycline degradation rate within 120 min can reach 91.8%, and the piezoelectric electro-catalysis characteristic is rapid and efficient. The method disclosed by the invention has important significance in developing a high-efficiency piezoelectric catalyst for degrading antibiotics.

The invention relates to an application of an imine bond orientation regulation monatomic coordination environment to enhance removal of organic pollutants, and relates to an application of catalytic degradation of organic pollutants. The preparation method comprises the following main steps: preparing two covalent organic framework substrates by using Knoevenagel condensation reaction through simple regulation and control of organic ligand functional group pairing; uniformly dispersing the obtained covalent organic framework material in an organic solvent, stirring and mixing with an organic solvent dissolved with metal ions, and separating and drying to obtain two monatomic catalysts. The regulated monatomic catalyst obtained by the invention shows a better removal effect on organic pollutants, is simple and convenient to operate and high in feasibility, and has good environmental and social benefits.

The invention discloses a tetracycline hydrochloride-containing wastewater treatment method in the field of wastewater treatment, which comprises the following steps: introducing tetracycline hydrochloride-containing wastewater into a reactor, adding a multilevel structure iron and iron sulfide composite carbon material, and adjusting the system to a nearly neutral condition; then adding potassium peroxymonosulfate composite salt, starting a direct current system, and carrying out catalytic degradation reaction under specific current density; and finally recovering the catalyst through magnetic field separation. The preparation method comprises the following steps: grinding pyrite and hematite, ball-milling and mixing the ground pyrite and hematite with orange peel powder and sodium hydroxide, and carrying out microwave pyrolysis, acid washing and drying, hydrogen peroxide surface treatment and the like to obtain a final product. According to the method, efficient degradation of tetracycline hydrochloride under the neutral condition is achieved, the catalyst can be magnetically recycled, secondary pollution is avoided, and the method has the advantages of being low in cost, easy and convenient to operate, environmentally friendly and the like.

The invention discloses a high-entropy metal oxide with efficient toluene photo-thermal catalytic efficiency and a synthesis method thereof. The high-entropy metal oxide is composed of oxides of Co, Mn, Ni, Zn and Fe, the metal molar ratio of Co to Mn to Ni to Zn to Fe is equal to (3.0-4.0): (3.0-4.0): (0.5-1.0): (0.5-1.0): (0.5-1.0), the high-entropy metal oxide is synthesized through an ethanol-water solvent coprecipitation combined hydrothermal crystallization and programmed calcination process, and the high-entropy metal oxide has excellent light absorption and heat transfer capacity, high toluene catalytic degradation activity and excellent catalytic stability, so that the high-entropy metal oxide can be used for photo-thermal catalytic oxidation of toluene.

The invention discloses a method for preparing a piezoelectric catalytic ceramic membrane at low temperature based on nano-particle modified rod-like barium titanate powder, which comprises the following steps: preparing nano-particle modified rod-like BaTiO3 powder from Bi4Ti3O12, BaCl. 8H2O, sodium oleate, deionized water and a NaOH solution, granulating, pressing and calcining to obtain a ceramic membrane product, and further carrying out electric polarization to obtain the piezoelectric catalytic ceramic membrane. The rod-like BaTiO3 powder of the nanoparticles with high surface activity not only ensures the mechanical strength of the ceramic membrane, but also effectively reduces the firing temperature. Meanwhile, the surface of the prepared ceramic membrane is of a wormlike curved surface structure, the pore size distribution is uniform, the stable separation performance is achieved, and the catalytic degradation function is achieved after electric polarization. The method is green and energy-saving, and the product can be applied to the fields of solid / gas and liquid separation, water environment restoration and the like, and has good application value.

The invention belongs to the technical field of advanced oxidation and membrane separation, and particularly relates to a PES / CP / CoCo-PBA composite catalytic membrane and a preparation method and application thereof.The PES / CP / CoCo-PBA composite catalytic membrane comprises a PES basement membrane and a catalytic activity layer combined on the PES basement membrane in situ through a phase inversion method, the catalytic activity layer is made of a CP / CoCo-PBA composite material, and the preparation method of the composite catalytic membrane comprises the steps that the PES basement membrane and the catalytic activity layer are combined in situ through a phase inversion method; the CP / CoCo-PBA composite material is formed by enabling catalytic particles CoCo-PBA to grow on a carbon material in situ through a hydrothermal method. The PES / CP / CoCo-PBA composite catalytic membrane provided by the invention has excellent catalytic degradation performance and good stability, not only has conductivity to realize the effect of electrochemically activating PMS, but also can keep higher mechanical strength and pollution resistance to meet the requirements of long-term operation and large-scale industrial application.

The invention discloses a method for efficient photo-thermal catalytic degradation of sulfur-containing organic gas. A preparation method of a sulfur-resistant catalyst comprises the following steps: (1) salt containing sulfur-resistant active metal A and an accelerant are added into water to obtain a salt solution of the active metal A, and the active metal A is selected from more than one of Fe, Co, Cu, Mn, Ni, Pt and Sr; (2) adding a salt solution containing an active phase metal B into the carbon dioxide nanotube, carrying out vacuum-assisted confinement, drying and reducing to obtain an active phase material for degrading the sulfur-containing organic gas in the confinement of the titanium dioxide nanotube, the active phase metal B being selected from more than one of Fe, Co, Cu, Mn, Ni, Pt and Sr; and (3) adding the active phase material of the titanium dioxide nanotube for confinement degradation of the sulfur-containing organic gas into the salt solution of the active metal A for coupling to obtain the sulfur-resistant catalyst. According to the method provided by the invention, the catalyst shows excellent catalytic performance in light and heat catalytic systems.

The invention discloses a MoO3 / TiO2 heterojunction material with a photocatalytic memory effect and application of the MoO3 / TiO2 heterojunction material in degradation of quinolone antibiotics, and belongs to the technical field of inorganic non-metallic material preparation, solar energy utilization and environmental protection. A molybdenum source precursor solution and a titanium source precursor solution are adopted to react, polyvinylpyrrolidone is used for modifying the surface of the material, the MoO3 / TiO2 heterojunction material is obtained, and the material can generate photochromic and photocatalytic memory effects under the pre-illumination effect. The memory effect provides continuous driving force for the catalytic reaction, and the activity of the material in the dark-state catalytic process is remarkably enhanced. The MoO3 / TiO2 heterojunction material disclosed by the invention shows excellent catalytic degradation performance in practical application, and particularly shows extremely high catalytic efficiency in the aspect of water pollution control.

The invention discloses a composite membrane with adsorption separation and catalytic degradation functions as well as a preparation method and application of the composite membrane. The composite membrane is supported by a porous base membrane, a polyamide separation layer formed by reaction of a 3, 4-dihydroxyphenylethylamine and 2, 3-diaminophenol comonomer and acyl chloride is constructed on the surface of the porous base membrane through interfacial polymerization, and FeCo-g-C3N4 nanosheets are anchored in situ; the membrane can efficiently activate peroxymonosulfate (PMS) to generate free radicals under the nearly neutral condition, efficient interception and catalytic degradation of organic pollutants (such as antibiotics) are synchronously achieved, and heavy metal ions (such as Pb < 2 + > and Cd < 2 + >) are adsorbed through a functional monomer structure; the invention provides an interfacial polymerization preparation method of the membrane. The composite membrane breaks through the limitation of'only interception but not degradation 'of a traditional membrane, realizes integration of'separation-adsorption-degradation', can remarkably reduce the volume of concentrated water and reduce the toxicity of the concentrated water, and is suitable for advanced treatment of wastewater containing composite pollutants in the industries of pharmacy, printing and dyeing and the like.

The invention belongs to the technical field of degradation and recovery of high polymer materials, and discloses a subcritical hydrothermal catalytic degradation and recovery method of acid anhydride / glycidyl ether epoxy resin, which comprises the following steps: placing an anhydride / glycidyl ether epoxy resin sample and a nitric acid solution in a hydrothermal reaction kettle; raising the temperature through a program temperature control device and maintaining a constant-temperature reaction. The degradation rate of 80.6%-100% of the epoxy resin can be achieved through the hydrothermal degradation reaction. Compared with a traditional thermal cracking and supercritical fluid degradation process, the method has the advantages that an acidic degradation system without organic solvent addition and transition metal catalysis is innovatively constructed, and efficient degradation of an epoxy resin network structure is realized under the subcritical hydrothermal condition. The process has the characteristics of mild reaction conditions, relatively low energy consumption, environmental friendliness and the like, and provides a feasible chemical technical path for resourceful treatment of the anhydride cured glycidyl ether type epoxy resin waste.

The invention relates to the field of water environment pollution treatment, in particular to a bimetal MOF modified cellulose derived carbon aerogel catalyst as well as a preparation method and application thereof. The method comprises the following steps: 1) dissolving a transition metal salt and an organic ligand in an organic solvent to prepare a bimetallic MOF precursor solution; 2) dissolving a cellulose derivative in water, and treating to prepare cellulose aerogel; (3) immersing cellulose aerogel into the precursor solution, and carrying out in-situ growth to prepare MOF modified cellulose gel; and 4) carrying out carbonization treatment on the modified cellulose gel to prepare the bimetallic MOF modified cellulose-derived carbon aerogel catalyst. The catalyst has extremely high physical and chemical stability, meanwhile, the catalytic performance of the catalyst is effectively improved by means of mechanisms such as bi-metal synergism, graded electron transfer and high-dispersion active sites, and the catalyst can be effectively used for effective and efficient catalytic degradation of organic pollutants in a water body and is beneficial to separation and recovery.

The invention discloses application of nitrogen-doped bamboo activated carbon in room-temperature oxidation of methyl mercaptan, and belongs to the technical field of sulfur-containing foul pollutant treatment. According to the catalyst, bamboo charcoal is used as a carbon source, 1, 10-phenanthroline or ammonia gas and 1, 10-phenanthroline are used as nitrogen sources, and the nitrogen-doped bamboo activated carbon catalyst is prepared through mixed grinding and high-temperature calcination. The nitrogen-doped bamboo activated carbon prepared by the method has abundant topological defects and structural alkaline sites, and has remarkable advantages in the aspect of oxidative degradation of methyl mercaptan at room temperature. The catalyst can realize catalytic degradation of methyl mercaptan at room temperature, can still keep the degradation rate of 85% or above after continuous reaction for 150 hours, and shows excellent catalytic activity and stability.

The invention belongs to the technical field of metal organic framework materials and catalytic oxidation, and particularly relates to a bimetallic MOF catalyst based on waste plastics and a preparation method and application thereof. Adding the PET plastic bottle fragments and metal salt into a solvent, heating to a specified temperature, reacting for a preset time, then cooling to room temperature, centrifugally separating, cleaning and drying to obtain the bimetallic MOF catalyst. The preparation method is simple in step, and a large amount of time can be saved. The bimetallic MOF catalyst can effectively catalyze and degrade various dyes, antibiotics and phenol pollutants, and has a good cyclic catalysis effect, a good cyclic catalysis effect and excellent stability. The bimetallic MOF catalyst is prepared from the waste plastics, so that the raw material cost in the MOF synthesis process can be reduced, and the environmental problem of the waste plastics is effectively solved.

The invention discloses a method for deep catalytic degradation of trace odor pollutants in a water environment by a piezoelectric field, and belongs to the technical field of water treatment.The method comprises the following steps that a purifying agent is added into the water environment to be treated, the active ingredient of the purifying agent is a piezoelectric material ZnO-Bi2O2 (OH) NO3, then mechanical excitation is applied by utilizing ultrasonic vibration or fluid pulse power, and the water environment to be treated is subjected to deep catalytic degradation; enabling the piezoelectric material ZnO-Bi2O2 (OH) NO3 to generate a local piezoelectric field to attract the odor pollutants in the water environment and catalytically degrade the odor pollutants, so as to remove the odor pollutants in the water environment; the odor pollutants comprise dimethyl isoborneol and / or geosmin. The method disclosed by the invention is green and environment-friendly, high in removal rate of odor pollutants and good in economical efficiency, and has a good application prospect in the field of water treatment, especially in front-end treatment of drinking water plants.

The invention discloses a multi-stage leaching purification method of a targeted therapeutic drug. The multi-stage leaching purification method comprises the following steps: sequentially filling an adsorption column with a porous organic polymer layer and an adsorption ball layer; controlling the flow rate of the leacheate and the column temperature for leaching, and setting an adsorption saturation threshold value; carrier gas is adopted to heat and desorb the porous polymer layer, and carrier gas components are switched to heat and desorb the adsorption ball layer; the method comprises the following steps: introducing carrier gas carrying iodine vapor into an alkaline absorption tower to treat waste gas, eluting impurities of adsorption balls by adopting an acidic mixed solution, and performing catalytic degradation by combining ultraviolet light; a chelating agent solution is used for regenerating adsorption balls, a silver salt solution is used for heavily loading silver ions, an organic solvent is used for eluting and regenerating a porous polymer, regular calibration and part replacement are conducted on a system, and organic pollutants and radionuclides in a matrix are difficult to treat synchronously through a traditional single-layer adsorption material; according to the leaching purification method, the generation amount of radioactive waste liquid is remarkably reduced, and meanwhile the shielding protection requirement of the follow-up purification step is reduced.

The invention relates to a method for treating printing and dyeing wastewater. The method comprises the following steps: neutralization regulation, primary filtration for removing scum, decoloration and flocculation, secondary filtration, pH regulation, catalytic degradation under visible light, MBR membrane treatment and discharge. The printing and dyeing wastewater treatment process provided by the invention is compact in link, the first-stage filtration, decoloration flocculation and second-stage filtration in the treatment process all adopt conventional technical means in the field, the operation is simple and convenient, the cost is low, and a special bismuth-based aerogel composite material is used as a catalyst for photocatalytic degradation at the rear end; the aerogel is prepared by cross-linking a modified graphene oxide / BiOCOOH composite photocatalyst with an acrylic polymer matrix and then carrying out supercritical drying, so that macroscopic immobilization of a nano catalyst is realized. According to the method, the technological process is compact, the cationic dye which is difficult to biologically treat can be efficiently degraded, the industrial problems that a powder catalyst is easy to lose and difficult to recycle are solved, key indexes such as COD and chromaticity of the treated wastewater are remarkably reduced, and the treated wastewater can be discharged after reaching the standard.

The invention provides a ganoderma lucidum AD256 strain, a ganoderma lucidum fermentation product prepared from the ganoderma lucidum AD256 strain and application of the ganoderma lucidum fermentation product, and belongs to the technical field of microbial fermentation. The invention provides a strain of ganoderma lucidum AD256, the preservation number of which is CCTCC NO: M 20252522, the ganoderma lucidum AD256 is fermented in a ganoderma lucidum fermentation culture medium containing plant powder to prepare a ganoderma lucidum fermented product, efficient fermentation of ganoderma lucidum and increase of the content of active substances are synchronously realized through the promotion effect of the plant powder on ganoderma lucidum fermentation and the catalytic degradation effect of ganoderma lucidum on the plant powder, and the ganoderma lucidum has a good application prospect. The preparation method of the ganoderma lucidum fermentation product provided by the invention is green, environment-friendly, simple and feasible, and suitable for large-scale production. The prepared ganoderma lucidum fermentation product with high active substance content has good antioxidant activity and an anti-aging effect, and has a wide market application prospect in the field of anti-aging cosmetics.

The invention discloses a method for catalytically degrading dye wastewater based on tetrahedrite. The method comprises the steps that tetrahedrite is subjected to mechanical activation and then mixed with peroxymonosulfate, the mixture is added into dye wastewater, the initial pH of a system is adjusted, a catalytic degradation reaction is carried out, tetrahedrite is recovered after the reaction is finished, and tetrahedrite is obtained. The mass molar ratio of tetrahedrite to peroxymonosulfate is (0.33-6): 1g / mmol; the mass ratio of tetrahedrite to organic residues in the dye wastewater is (10-80): 1. According to the method, active sites on the surface of tetrahedrite are used for adsorbing PMS molecules, PMS is activated through electron transfer to generate active free radicals, singlet oxygen in the active free radicals plays a main role, superoxide free radicals and sulfate free radicals play auxiliary roles, and therefore the catalytic activity and the degradation rate of organic matter in dye wastewater are greatly improved.

The invention discloses a preparation method and application of a heterojunction catalyst based on a two-dimensional zinc porphyrin metal organic framework, and belongs to the field of photochemical energy conversion and photocatalytic degradation. The invention aims to solve the technical problems of high-quality preparation of the artificial photosynthetic photocatalytic composite material and how to effectively improve the photochemical energy conversion efficiency. The method comprises the following steps: 1, dissolving bismuth nitrate pentahydrate, sodium tungstate dihydrate and sodium dodecyl dimethyl benzene sulfonate in deionized water, fully stirring, and transferring the solution to a reaction kettle for hydrothermal reaction; cooling to room temperature, washing and drying to obtain bismuth tungstate solid powder; 2, adding bismuth tungstate and meso-tetra (4-carboxyl phenyl) porphin into a mixed solution of N, N-dimethylformamide and ethanol, carrying out ultrasonic treatment, and fully stirring to obtain a solution A; dissolving zinc nitrate hexahydrate, pyrazine and polyvinylpyrrolidone in a mixed solution of N, N-dimethylformamide and ethanol, and fully stirring to obtain a solution B; after the solution is fully dissolved, dropwise adding the solution B into the solution A under ultrasonic and stirring conditions, and then putting the beaker into an oil bath pan for heating; and cooling to room temperature, washing, and storing in an ethanol solution to obtain the Zn-MOF / Bi2WO6 heterojunction composite material.

The application provides a bifunctional composite film of multi-guest molecule synchronous gas phase coordination deposition, metal precursors and organic ligands are dissolved in an organic solvent, a porous inorganic substrate is immersed in the organic solvent, and a substrate loaded with a MOF layer is obtained through a hydrothermal reaction; the substrate loaded with the MOF layer, nitrogen-containing organic ligands and an organic metal compound are placed in a closed container, a MOF composite film with metal nanoparticles is obtained through gas phase deposition, and the MOF composite film is calcined at 160-240 DEG C for 1-4 hours to obtain the bifunctional composite film of multi-guest molecule synchronous gas phase coordination deposition; through molecular level design, the catalytic active center is firmly anchored in the separation matrix, and the problem that the active component is prone to loss is solved. The prepared composite film has excellent oil-water separation performance and efficient photo-Fenton catalytic degradation capacity, and provides an innovative material solution for advanced water treatment.

The application discloses a method for preparing Fe-CaTiO3 heterogeneous visible light Fenton catalyst from vanadium-titanium magnetite, and comprises the following steps: (1) vanadium-titanium magnetite powder, bentonite, slaked lime and water are mixed according to a proportion, and then enter a disc balling machine to be balling to prepare green balls; (2) the green balls prepared in the step (1) are dried and roasted to prepare oxidized pellets; (3) the oxidized pellets are reduced in a hydrogen-rich reducing atmosphere to obtain direct reduced iron (DRI) containing CaTiO3; (4) the DRI is cooled to below 50 DEG C under the protection of inert gas; and (5) the cooled DRI is crushed and ball milled, and thus Fe-CaTiO3 is obtained. The prepared Fe-CaTiO3, H2O2 and visible light constitute a photo-assisted heterogeneous Fenton reaction system, which can efficiently catalyze degradation of organic pollutants in wastewater; and the method has the advantages of low preparation cost, high catalytic activity, easy recovery and reusability.

The application provides a carbon dioxide absorption system and an absorption method. The absorption system comprises: an absorption tower, which is used for absorbing carbon dioxide in flue gas to obtain rich amine solution; a lean-rich solution heat exchanger, which is used for heat exchanging the rich amine solution and the lean amine solution to obtain hot rich amine solution and cold lean amine solution; a regeneration tower, which is used for removing carbon dioxide in the hot rich amine solution to obtain lean amine solution; an iron ion detector, which is used for detecting the content of iron ions in the cold lean amine solution; and an iron ion adsorber, which is used for adsorbing the iron ions in the cold lean amine solution. The application is helpful to reduce the catalytic degradation degree in the operation process of the two-phase amine absorbent, thereby being helpful to improve the stability and the length of the operation of the absorption system, and further being helpful to improve the absorption efficiency of the carbon dioxide.

The application discloses a method for treating organic pollutant wastewater by using manganese monoxide-graphite diacetylene nano-confined catalytic material to activate persulfate, the method is to degrade and treat organic pollutant wastewater by using manganese monoxide-graphite diacetylene nano-confined catalytic material as a catalyst for activating persulfate, and the nano-confined catalytic material comprises graphite diacetylene nanosheets, and manganese monoxide nanoparticles are confined between the layered structures of the graphite diacetylene nanosheets.The method has the advantages of rich active sites, fast electron transfer and stable structure, so that the catalytic degradation system is not only high in efficiency, but also strong in adaptability, and shows good degradation effect on various organic pollutants, and has the advantages of simple process, convenient operation, high treatment efficiency, good removal effect, strong adaptability, green environmental protection and the like, and has important promoting significance for deep purification of organic pollutant wastewater.