222 results about "Peracetic acid" patented technology

The invention relates to the technical field of environmental pollution control, in particular to application of grass acidified zero-valent iron in in-situ remediation of organic polluted underground water. According to the preparation method, oxalic acid and micron zero-valent iron are evenly mixed and then subjected to ball milling treatment, oxalic acid zero-valent iron of a core-shell structure is obtained through post-treatment, the oxalic acid zero-valent iron has high electron transfer efficiency, Fe < 2 + > / Fe < 3 + > circulation is further regulated and controlled through oxalic acid coordination in the oxalic acid zero-valent iron, interface electron transfer is enhanced, and the preparation method is suitable for industrial production. Peroxyacetic acid is promoted to be activated to generate various active oxygen species, and efficient degradation of organic pollutants is achieved. The invention solves the problems of low zero-valent iron electron transfer efficiency, single active oxygen species, secondary pollution of iron sludge and the like in the process of degrading organic pollutants by using the existing zero-valent iron advanced oxidation technology.

The invention discloses a composite catalyst in a Fe3O4 nanoparticle confined carbon nanotube and application of the composite catalyst in degradation of bisphenol pollutants in water, and belongs to the technical field of environmental protection and water treatment. According to the catalyst, Fe3O4 nano-particles with the particle size of 1-5 nm are confined in inner channels of multi-walled carbon nanotubes (CNTs), stable Fe-C bonds are formed between Fe atoms and carbon atoms on the inner walls of the CNTs, a nano confinement structure is constructed, and the stability and electron transfer efficiency of the catalyst are improved. When the catalyst is used for activating peracetic acid (PAA), bisphenol pollutants in water can be quickly and efficiently removed. The catalyst can keep high-efficiency degradation performance in a wide range of pH value of 4-12, the degradation efficiency is still kept at 95% or above after the catalyst is recycled for 10 times, and the catalyst shows remarkable stability and practicability. The invention provides a novel catalyst which is excellent in performance, economical and environment-friendly and a process method for the field of actual water treatment.

The invention discloses a composite catalyst for a peracetic acid activation system and a preparation method and application thereof, and relates to the technical field of advanced oxidation water treatment. The preparation method of the catalyst comprises the following steps: preparing an aqueous solution of a cobalt source as a precursor solution; adding a manganese source into the precursor solution to obtain a Co-Mn mixed salt solution; adding a complexing agent into the Co-Mn mixed salt solution to form a stable sol system; heating the sol system at constant temperature to obtain wet gel; drying the wet gel to obtain a porous dry gel precursor; calcining the porous xerogel precursor, and then cooling and grinding to obtain the composite catalyst for the peracetic acid activation system. The composite structure in the catalyst greatly improves the rate of generating hydroxyl radicals and organic oxygen radicals by decomposing peracetic acid by promoting electron transfer circulation of a metal active center, shows good structural stability and recyclability, and is especially suitable for degradation of an organic pollutant sulfamethoxazole in a water body.

The invention discloses a preparation method of a catalytic oxidation peroxyacetic acid self-release oxygen membrane and application thereof in the field of water treatment, and belongs to the technical field of water pollution control. The invention aims to solve the problems of unbalanced release rate and oxidation activity, self-decomposition loss of an oxidant, secondary pollution risk, and insufficient dynamic cleaning and long-acting anti-pollution capability in the traditional oxygen release technology. According to the invention, peroxyacetic acid is taken as an oxidizing agent, and a self-oxygen-release membrane for catalytic oxidation of peroxyacetic acid is taken as a catalyst, so that an oxygen-release membrane system is constructed, the water treatment efficiency and membrane performance are remarkably improved, the operation energy consumption of the system is greatly reduced, and an innovative solution is provided for development of an intelligent water treatment technology. The method has wide application scenarios, and is suitable for different water quality and treatment requirements. The high-efficiency degradation capability on pollutants such as antibiotics and endocrine pollutants is realized, the high-efficiency interception on complex pollutants such as humic acid, protein and colloid is realized, and the high-efficiency degradation capability is suitable for water supply sources, municipal sewage, industrial wastewater and reclaimed water treatment scenes.

The invention discloses a copper-cobalt bimetallic catalyst and a preparation method and application thereof. The preparation method comprises the following steps: mixing ZIF-67, a copper source and a solvent, adjusting the pH value to 7.0, stirring, standing, centrifuging, washing and drying to obtain ZIF-67 adsorbed with copper ions, and calcining to obtain the copper-cobalt bimetallic catalyst. Compared with a conventional cobalt-based bimetallic catalyst, the copper-cobalt bimetallic catalyst prepared by the invention has the advantages of large specific surface area, multiple catalytic active sites, high catalytic activity, good structural stability and the like, is a novel catalyst with a novel structure and excellent performance, can efficiently activate peracetic acid and is used for degrading antibiotics; the method can realize deep oxidative degradation of various antibiotics in different water bodies, has the advantages of high reaction system activation rate, high degradation efficiency, wide pH application range, good reusability, low metal leaching amount, no secondary pollution and the like, and is high in use value and good in application prospect.

The invention discloses an electro-catalysis device for promoting peracetic acid synthesis by using anode oxygen and a process method, and relates to the technical field of peracetic acid synthesis. Comprising a cathode cover plate, a gas runner chamber, a cathode chamber, an anode chamber and an anode cover plate which are arranged in sequence, a gas diffusion electrode is adopted as a cathode, a rhombic titanium mesh coated with IrO2 is adopted as an anode electrode, the gas diffusion electrode is located between the gas runner chamber and the cathode chamber, the anode electrode is located between the cathode chamber and the anode chamber, and the anode cover plate is located between the cathode chamber and the anode chamber. A proton exchange membrane is arranged between the anode electrode and the cathode chamber, an anion exchange membrane is arranged between the gas diffusion electrode and the cathode chamber, and the gas diffusion electrode and the anode electrode extend to the outside through a copper adhesive tape. According to the method, the electro-catalysis device is constructed, high-concentration hydrogen peroxide on a catalyst interface is utilized, and oxygen generated by excavating the anode is used as a source of cathode oxygen, so that the yield of the peracetic acid is greatly increased, and in-situ generation of the peracetic acid and excavation of the oxygen generated by the anode are realized.

There is provided a peracetic acid concentration meter that inhibits contamination of a working electrode surface by organic material, and makes it possible to measure a peracetic acid concentration more accurately than is possible conventionally. The present invention is a diaphragm-type peracetic acid concentration meter that measures a peracetic acid concentration in a test solution and is characterized in being provided with a diaphragm that is permeable to peracetic acid, an internal solution in which peracetic acid that has permeated through the diaphragm is dissolved, a working electrode and a counter electrode that are immersed in the internal solution, and a permeation-inhibiting layer that is laminated onto a surface of the diaphragm on a side thereof that is in contact with the test solution, and that inhibits permeation of organic material.

The invention discloses a preparation method and application of an iron carbide nanoparticle modified carbon-based Fe monatomic catalyst, in the preparation process, Fe < 3 + > is complexed with oxalic acid in advance to realize coordination self-assembly and effectively inhibit hydrolysis of Fe < 3 + >, and glucose is used as a carbon-based carrier precursor and a reducing agent to prepare a carbon-based Fe monatomic catalyst. According to the preparation method, the self-assembled iron species are converted into Fe3C nanoparticles at a high temperature, melamine and cyanuric acid are used as N sources to realize N-doped carbon and anchor part of the iron species to form Fe monatomic atoms, and in addition, oxalic acid, melamine and cyanuric acid are easy to decompose at the high temperature to generate small-molecule gas, so that glucose forms a porous carbon structure during high-temperature carbonization, and the porous carbon structure is formed. Finally, Fe3C and Fe monatomic synergistic coexistence hierarchical porous N-doped composite carbon-based catalyst is achieved, the obtained catalyst can efficiently activate peracetic acid and degrade phenol organic pollutants, and the catalyst is simple in preparation process, good in catalytic effect and high in stability and has wide application potential.

The invention discloses a modified PVC (polyvinyl chloride) particle and a preparation method thereof in the field of high polymer material modification, the modified PVC particle takes PVC resin as a matrix, and two brand new modifiers, namely a silicon-boron-nitrogen hybrid epoxy nanosphere and epoxidized soybean oil-maleic anhydride-2-ethylhexyl acrylate random copolymer, and other auxiliaries are added. The silicon-boron-nitrogen hybrid epoxy nanospheres are prepared by the following steps: hydrolyzing tetraethoxysilane and triethyl borate in absolute ethyl alcohol to generate a silicon-boron alcohol intermediate, then carrying out sol-gel reaction on the silicon-boron alcohol intermediate and glycidyl methacrylate to form a hybrid network containing an epoxy group, and finally carrying out ultrasonic dispersion. The epoxidized soybean oil-maleic anhydride-2-ethylhexyl acrylate random copolymer is prepared by carrying out ring opening on epoxidized soybean oil and peracetic acid to generate epoxidized soybean oil acrylate, and then carrying out free radical copolymerization reaction on the epoxidized soybean oil acrylate, maleic anhydride and 2-ethylhexyl acrylate. The method is suitable for the fields of high-end building materials, automotive interiors and the like.

A transition metal-doped copper oxide (CuO) nanoparticle film synthesis system (100) for the photoelectrochemical production of hydrogen, wherein the system (100) comprises: a heating vessel (102) configured for heating and mixing an ethanolamine-stabilized solution of copper acetate monohydrate in 2-methoxyethanol at 50-70 °C for 1-3 hours; an additive dispenser (104) connected to the heating vessel (102) and configured to introduce concentrated iron(III) chloride and cobalt nitrate into the heating vessel (102) to form a solution; a storage unit (106) connected to the additive dispenser (104), which is configured to age the prepared solutions at ambient temperature for 22-26 hours; a spin coater unit (108) connected to the storage unit (106) and configured to apply the prepared solutions to well-cleaned and dried glass substrates, i.e., CuO thin films, to form the CuO thin films doped with iron(III) chloride and cobalt nitrate; a drying unit (110) integrated with a heating plate (110a) and connected to the spin coater unit (108) configured to dry the coated layers at 130-170 °C, the coating and drying of the solution being repeated for six cycles to obtain a film of defined thickness using a multilayer deposition control unit; and a calcination chamber (112) connected to the drying unit (110) and configured to heat the obtained films to 350-450 °C in air for 1-3 hours to crystallize the CuO thin films doped with iron chloride and cobalt nitrate for the production of photoelectrochemical hydrogen.

The invention provides a method for degrading organic pollutants by catalyzing peracetic acid with trace cobalt based on bicarbonate radical coordination reinforcement, and belongs to the technical field of organic pollutant wastewater treatment. The method comprises the following steps: sequentially adding a cobalt salt, a ligand and peracetic acid into the organic wastewater, and reacting to complete degradation of organic pollutants, the ligand is a soluble inorganic salt carrying bicarbonate radicals. A novel peracetic acid activation method is constructed, a special cobalt complex structure is formed by introducing a synergistic effect mechanism of trace cobalt ions and bicarbonate ions, Co (III) / Co (II) valence cycle is effectively promoted, the generation amount of organic free radicals and high-valence cobalt active substances is increased, and the degradation efficiency of organic pollutants is remarkably improved. The method provided by the invention has the advantages of small addition amount of cobalt ions, strong degradation capability and the like, is strong in environmental interference resistance, and is suitable for a weak acid environment.

The invention relates to a cultivation method of morchella esculenta, and belongs to the technical field of industrialized production of edible mushrooms. The method comprises the steps of culture medium preparation and laying, sowing, exogenous nutrient supplement, mycelium culture, primordium induction, primordium differentiation, young mushroom and maturity management, second flush mushroom management and the like. Mountain immature soil, rice hull powder, chestnut sawdust and the like are selected as main materials of a used culture medium, peracetic acid fermentation treatment is combined, and traditional formaldehyde treatment which is high in cost and harmful to the environment is replaced. Fermentation type nutrition bricks are adopted as exogenous nutrition materials, and on-site preparation and sterilization operation are replaced. Natural light is combined with LED light supplement, temperature and humidity environments are regulated and controlled in a partitioned mode, energy consumption is reduced, and the thallus development stability is improved. Unified management and batch harvesting are achieved through a multi-layer frame and standard box modular structure. The method has the advantages of low production cost, simplicity in technical implementation, stable yield, suitability for large-scale popularization and the like.

The invention discloses a preparation method of a metal organic framework catalyst and application of the metal organic framework catalyst in biomass furfural hydrogenation, and belongs to the technical field of catalytic hydrogenation. The preparation method of the metal organic framework catalyst comprises the following steps: S1, dissolving cobaltous acetate, L-glutamic acid and phosphomolybdic acid in distilled water to obtain a solution marked as a solution A; dissolving 1, 3, 5-benzenetricarboxylic acid (BTC) in ethanol to obtain a solution B, pouring the solution B into the solution A, stirring, and centrifuging to collect a precipitate; and S2, calcining the precipitate in an inert atmosphere to obtain the metal organic framework catalyst. The specific steps of applying the catalyst to the furfural hydrogenation reaction are as follows: adding the prepared catalyst and furfural into deionized water, performing heating and pressurizing reaction through a hydrogenation reaction kettle to obtain a solution, extracting the solution with ethyl acetate, and performing GC quantitative detection on the product after the extraction reaction. The method is mild in reaction condition, has an efficient furfural hydrogenation effect, and can completely convert FFA within 2 hours under the condition that 50 mg of catalyst is added.

The invention discloses a chlorine-free environment-friendly bleaching agent for refined cotton. Comprising the following raw materials in parts by weight: 5-18 parts of peracetic acid, 10-30 parts of hydrogen peroxide, 5-8 parts of a sodium alginate / PEG4000 / modified cellulose nanowhisker compound, 1-5 parts of an organic acid catalyst, 0.05-0.5 part of a dipicolinic acid stabilizer, 0.01-0.1 part of a magnesium salt stabilizer, 2-10 parts of a pH buffer solution and 40-60 parts of deionized water. According to the chlorine-free environment-friendly refined cotton bleaching agent disclosed by the invention, efficient bleaching under mild conditions is realized through precise matching of a composite oxidation system and a multi-element synergistic protection system; meanwhile, the invention provides a preparation method and an application process of the bleaching agent, the bleaching agent is adaptive to the existing production line, and enterprise upgrading cost is reduced.

A method for controlling microbial growth in a sugar processing system is disclosed, wherein the method comprises adding a peroxy acid into water of a flume system used for transporting a sugar-containing plant material from a delivery or storage location to a wash system. In one non-limiting example embodiment, the sugar-containing plant material comprises sugar beets, and the peroxy acid comprises peracetic acid.

Various formulations of a high-level disinfectant and liquid chemical sterilant are provided. The formulations include a peracetic acid solution which has achieved equilibrium and is catalyzed by an amount of sulfuric acid in the solution. The inclusion of sulfuric acid greatly reduces the amount of time to achieve equilibrium, and despite the inclusion of a mineral acid the resulting solution has enhanced reuse stability and equivalent toxicity, improved sterilization properties, and material compatibility to non-catalyzed peracetic acid solutions.

The invention relates to a method for enhancing collaborative risk factor control in a sludge recycling process, in particular to a method for enhancing collaborative resistance gene risk control in anaerobic fermentation acid production of excess sludge through combined pretreatment of nano zero-valent iron and peracetic acid. The invention aims to solve the problem of resistance gene transfer in the sludge resource recycling process. The method comprises the following steps: naturally settling residual sludge, removing supernate to obtain concentrated sludge, and adding nano zero-valent iron and peracetic acid for combined pretreatment. And placing the treated sludge in a reaction container, aerating with nitrogen, sealing the reactor, and carrying out anaerobic fermentation in a constant-temperature oscillator. According to the invention, organic matters in the sludge can be converted into short-chain fatty acid, the structure of a resistance gene can be destroyed, and the abundance of the resistance gene in the sludge is reduced. Meanwhile, horizontal transfer of resistance genes in the sludge is inhibited, and the environmental risk is controlled. The method is applied to the field of organic solid waste resource utilization.

The invention discloses a method for enhancing compost humification synergistic gas emission reduction and tetracycline degradation through thermal activation peroxide, and relates to the technical field of compost. The method comprises the following steps: mixing livestock and poultry manure and 1-3cm crop straws according to a dry weight ratio of (1-3): 1, and adjusting the carbon-nitrogen ratio to (20-30): 1 to complete raw material pretreatment; when the temperature of the pile body is 25-35 DEG C, peroxide (hydrogen peroxide, peracetic acid or potassium persulfate) is sprayed and mixed uniformly in the form of an aqueous solution, the addition amount is 0.125-1.25% of the dry weight of the raw materials, the moisture content of the pile body is controlled to be 55-75%, and continuous or intermittent ventilation composting is carried out at the speed of 0.2-1.0 m < 3 > h <-1 >. According to the method, the peroxide is activated by utilizing self-produced heat of compost, external energy sources and chemical activators are not needed, triple effects of compost humification improvement, ammonia gas and greenhouse gas emission reduction and tetracycline degradation are realized, and the method is green, environment-friendly, low in cost and suitable for organic solid waste treatment.

The application discloses a sludge-based activated carbon loaded monatomic catalyst, a preparation method thereof and application thereof in activating peracetic acid to degrade organic pollutants in water. The catalyst comprises a nitrogen-doped sludge activated carbon porous carrier in a graphene appearance and Fe monatomic atoms loaded on the nitrogen-doped sludge activated carbon porous carrier, wherein the Fe monatomic atoms have 2Fe-N4 and Fe2N6 double coordination structures. The preparation method comprises the following steps: S1, after wastewater sludge is dried, crushed, sieved, mixed with a ZnCl2 solution, and then solid-liquid separation is performed to obtain the solid, the solid is dried, first pyrolysis is performed in an inert atmosphere, acid washing purification is performed, and water washing is performed, a sludge-based porous activated carbon is obtained; S2, the sludge-based porous activated carbon, melamine and Fe(NO3)3.9H2O are uniformly mixed in a solvent, and then dried to obtain a precursor solid; and S3, the precursor solid is subjected to second pyrolysis in an inert atmosphere, acid etching, water washing and drying.

The invention provides a synthetic method of 2-(2-amino-5-bromo-benzoyl) pyridine, and belongs to the technical field of medicine synthesis. A one-pot boiling method is adopted, 2-cyanopyridine and 4-bromaniline are used as raw materials, BCl3 is used as a catalyst, dichloromethane is used as a solvent, a heat preservation reaction is performed for 5-25 hours at the temperature of-10 DEG C to 40 DEG C, and the product 2-(2-amino-5-bromo-benzoyl) pyridine is obtained through ethyl acetate extraction, anhydrous sodium sulfate drying and dichloromethane and petroleum ether recrystallization. According to the preparation method of the 2-(2-amino-5-bromo-benzoyl) pyridine, provided by the invention, butyl lithium with extremely high dangerousness does not need to be used, the reaction steps are simple, the yield is stable, the treatment is easy, and the yield is high.

The invention provides a preparation method of unsaturated fatty acid, which obviously reduces the residual amount of dioxin in grease through tromethamine treatment, effectively separates EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) through magnesium acetate precipitation, and improves the cycle use frequency of silver nitrate cycle use liquid through stannous chloride treatment and alkaline alumina treatment. And the unsaturated fatty acid separation capability of the silver nitrate recycling liquid is maintained.

The application discloses a method for degrading organic matter by activating peracetic acid by using electrochemically generated atomic hydrogen, and degrading antibiotics, and can realize mineralization effect, improve degradation effect, improve degradation efficiency, and does not need other catalysts, thus avoiding other energy input, reducing cost, avoiding secondary pollution, realizing directional degradation effect, having strong anti-interference capability in degradation, and being good in use effect and beneficial to promotion.

The application discloses a preparation method of a deodorant product, and comprises the following steps: step one, preparing a cross-linked hydroxypropyl methyl cellulose and chitosan water solution: hydroxypropyl methyl cellulose and chitosan are dispersed in water in a mass ratio of 1:1 to form a uniform and stable water dispersion a; peracetic acid and a copper ion catalyst are added to the water solution a, and the water solution a is heated and treated at 80-100 DEG C for 3-5 hours to obtain a water solution b; glucose is added to the water solution b to remove excess peracetic acid, and the water solution b is heated and treated for 1 hour again; and the cross-linked hydroxypropyl methyl cellulose and chitosan water solution is obtained after cooling; step two, preparing a stable hydrogen peroxide solution: urea is added to a hydrogen peroxide solution, and the solution is stirred at 40-50 DEG C for 1 hour; cyclodextrin is added to the above solution, and the solution is continuously stirred at 40-50 DEG C for 1 hour; and the stable hydrogen peroxide solution is obtained after cooling to room temperature; and step three, preparing the deodorant product: the cross-linked hydroxypropyl methyl cellulose and chitosan water solution obtained in step one and the stable hydrogen peroxide solution obtained in step two are mixed in a ratio of 1:5 to 1:1, and sodium chlorite is added, so that the deodorant product is obtained after stirring.

The application discloses a method for removing trace sulfonamidochrysoidine in water by activating peracetic acid through complexation of manganese sulfate and 2-picolinic acid, wherein, (1) a homogeneous Mn(II)-PICA complex solution is prepared by mixing and stirring a manganese sulfate solution and a 2-picolinic acid solution; (2) peracetic acid solution and the homogeneous Mn(II)-PICA complex solution are added into water containing sulfonamidochrysoidine, and the mixture is fully stirred, and in the reaction process, high-valence manganese active species Mn(V)=O is generated; the system mainly adopts a non-radical oxidation path, has high selectivity to sulfonamidochrysoidine, and realizes degradation of the sulfonamidochrysoidine. The method has high activation efficiency and fast degradation speed, and the complex system significantly improves the activation efficiency of PAA, and the removal rate of sulfonamidochrysoidine can reach more than 90 % within 10 min, which is much higher than that of a single activation system.

This application discloses a cobalt-supported peanut shell biochar / peracetic acid synergistic system for water treatment and its application. The synergistic system includes cobalt-supported peanut shell biochar, peracetic acid, and water. The cobalt-supported peanut shell biochar comprises a peanut shell biochar matrix and cobalt-containing substances supported on the matrix. The cobalt-containing substances include metallic cobalt and / or cobalt oxides. The mass ratio of cobalt-supported peanut shell biochar to peracetic acid is (2-132):1. The atomic ratio of cobalt to carbon in the matrix is ​​(0.2-0.3):1. The cobalt-supported peanut shell biochar has a mesoporous structure with a total pore volume of not less than 0.07 cm³ / g and a specific surface area of ​​not less than 100 m². 2 / g. When this synergistic system is used to treat water containing organic pollutants, especially sulfamethoxazole, it can achieve a removal rate of over 90% within 3-5 minutes. The system maintains high activity and good stability over a wide pH range and in the presence of common anions, exhibiting excellent continuous operation performance. The degradation pathway of this synergistic system is environmentally friendly and can effectively reduce the toxicity of the products.

The invention discloses a preparation method of a medical radiopharmaceutical aseptic packaging material, which comprises the following steps: firstly, blending graphene enhanced PET (Polyethylene Terephthalate) and radiation crosslinked polyethylene through a melt extrusion process to form a three-layer composite structure with antibacterial property, mechanical support property and high barrier property; secondly, forming by adopting a laser heat sealing technology, embedding a photochromic microbial indicator, and simultaneously integrating a PTFE (Polytetrafluoroethylene) membrane filter layer and an iodine adsorption pad; then, electron beam irradiation is used for body sterilization, and ultrasonic atomization peracetic acid is used for disinfection; finally, a PVDF-HFP / zinc oxide composite nanofiber membrane is prepared through an electrostatic spinning technology, a PLA buffer layer is sleeved, a temperature-sensitive radiation protection material is pre-buried, and seamless sealing is completed; experimental results show that the novel packaging material not only has excellent antibacterial performance, mechanical strength and chemical stability, but also can effectively improve the shielding efficiency on beta / gamma rays, and ensures the safety and stability of radiopharmaceuticals in the storage and transportation processes.

The invention relates to the technical field of disinfectants, in particular to a disinfectant production process for improving stability by utilizing a synergistic effect. The method comprises the following steps: preparing raw materials, preparing and premixing a stabilizer solution, adding acetic acid and hydrogen peroxide, reacting, aging, filtering and treating a product. In the disinfectant production process for improving the stability by utilizing the synergistic effect, four stabilizers are prepared into dilute solutions and mixed in proportion, the dilute solutions and peracetic acid can generate the synergistic effect, decomposition of peracetic acid is inhibited from the molecular level, catalytic decomposition of hydrogen peroxide by metal ions is avoided through nonmetal material equipment with a light shielding system, and the stability of the disinfectant is improved. Decomposition reaction caused by illumination is prevented, and product stability is improved; meanwhile, in the aspect of safety, the explosion risk of a container during hydrogen peroxide storage and the injury to operators during mixing are avoided; and in the aspects of cost and convenience, the production cost is reduced, a consumer does not need to mix by himself, and the use convenience of the product is improved.

The application provides a Mo and K co-doped MnO2 catalyst, which is obtained by doping Mo and K in alpha-MnO2 nanowires, and Mo and K are uniformly distributed on the surface and tunnel structure of the alpha-MnO2 nanowires, and the catalyst has a hydroxyl functional group. The application also provides a preparation method of the catalyst, and a method for degrading pollutants by activating peracetic acid with the catalyst, wherein peracetic acid and the catalyst are added into wastewater containing organic pollutants under stirring, and the pH value of the wastewater is controlled to be 5-9; in the wastewater treatment process, the catalyst activates the peracetic acid to generate organic free radicals and singlet oxygen to degrade the organic pollutants in the wastewater. The application can improve the ability of the MnO2-based catalyst to activate peracetic acid to generate active species to degrade organic pollutants, and solves the problems that the existing MnO2-based catalyst has low ability to activate peracetic acid and poor degradation ability for organic pollutants.

The invention discloses application of a cobalt sulfide composite material containing sulfur defects in catalyzing PAA to degrade organic pollutants, and belongs to the field of water treatment. The cobalt sulfide composite material is of a hollow microsphere structure, a spherical shell of a hollow microsphere is composed of two-dimensional thin nanosheets, and the two-dimensional thin nanosheets have two groups of different continuous lattice stripes and show high crystallinity; the cobalt sulfide composite material comprises a sulfur element and a cobalt element; the cobalt sulfide composite material contains sulfur defects. According to the material, a sulfur defect is introduced on the basis of cobalt sulfide, so that the catalytic activation capability on peracetic acid is enhanced, and the treatment efficiency on organic pollutants and heavy metals in water is improved. The raw materials are low in price, the preparation process is simple and easy to implement, the application process is clean and free of pollution, and the method is suitable for large-scale pharmaceutical wastewater, industrial wastewater, hospital sewage treatment and the like.

The invention belongs to the technical field of sewage treatment, and particularly relates to a method for degrading cyanide-containing wastewater. When the cyanogen-containing wastewater is cyanogen-containing complex wastewater, the method for degrading the cyanogen-containing wastewater comprises the following steps: sequentially carrying out photolysis reaction and first oxidation reaction on the cyanogen-containing wastewater under the condition that the pH value is 9.5-13.0; when the cyanide-containing wastewater is free cyanide-containing wastewater, the method for degrading the cyanide-containing wastewater comprises the following steps: sequentially carrying out a second oxidation reaction on the cyanide-containing wastewater under the condition that the pH value is 9.5-13.0; oxidizing agents for the first oxidation reaction and the second oxidation reaction are solutions of peracetic acid; the second oxidation reaction is carried out under the condition of ultraviolet irradiation. The method provided by the invention can destroy stable coordinate bonds (Fe-CN) of ferricyanide, improves the degradation efficiency, and does not generate secondary pollution.