67results about How to "Improve oxidation capacity" patented technology

The utility model discloses a novel advanced oxidation device which comprises an outer shell, a gas-liquid mixing chamber, an ultrasonic atomization disc, a gas inlet hole, a water inlet hole, a connecting ozone generator, a UV reaction coil pipe and the like. Through ultrasonic wave catalysis and ultraviolet light catalysis, H2O is excited by O3 and a large amount of. OH with higher oxidability is generated, the mixing degree and turbulent fluctuation intensity of ozone and sewage are improved, the mass transfer coefficient is increased, the mass transfer rate of ozone is increased, and four-section oxidation reaction is carried out in one reactor, so that the ozone oxidation efficiency and effect are greatly improved; and a reinforced oxidation effect is generated on pollutants in the wastewater, so that the pollutants in the wastewater are degraded and removed.

The invention provides a method for deeply extracting vanadium from vanadium-containing steel slag, which comprises the following steps: mixing the vanadium-containing steel slag and an oxygen-containing microbubble ammonium bicarbonate solution, and carrying out mechanochemical ball milling activation to carry out leaching reaction to obtain a vanadium extracting solution. According to the method, advanced oxidation is cooperated with mechanochemical ball milling to activate and strengthen deep extraction of vanadium in the vanadium-containing steel slag, wrapping of substances such as calcium silicate and calcium titanium oxide on a vanadium-containing solid solution phase is destroyed through mechanical activation, and O2 microbubbles in an ammonium bicarbonate medium are promoted to generate active oxygen under excitation of mechanical activation energy; exposure reaction and deep oxidation extraction of a vanadium-containing phase under mild conditions are achieved, the content of V2O5 in tailings after vanadium extraction is smaller than or equal to 0.5%, and the vanadium extraction rate is 83% or above.

The invention discloses an oxidation reaction device for an isotope analysis system, and belongs to the technical field of carbon isotope analysis systems.The gas inlet end of the oxidation reaction device is communicated with a gas chromatography, and the gas outlet end of the oxidation reaction device is communicated with an isotope ratio mass spectrometry. A gas inlet end of the heating furnace is communicated with a gas outlet of the gas chromatography, and a gas outlet end of the heating furnace is communicated with the isotope ratio mass spectrum; the oxidizing agent spraying structure is at least partially arranged at the upper end of the inner cavity so as to uniformly spray an oxidizing agent into the inner cavity; the oxidizing agent circulating structure is communicated with the oxidizing agent spraying structure through a first pipeline, and the oxidizing agent circulating structure conveys the oxidizing agent sprayed by the oxidizing agent spraying structure and collected at the bottom of the inner cavity to the oxidizing agent spraying structure again, so that repeated utilization of the oxidizing agent is achieved. According to the invention, by arranging the oxidant spraying structure, an oxidant is uniformly scattered in the heating furnace, so that the oxidation reaction is more sufficient, and the oxidation effect is enhanced.

The invention belongs to the technical field of water treatment, and relates to a method for removing new pollutants in water by using a far ultraviolet assisted sodium hypochlorite system. The method comprises the following steps: S1, adjusting the pH value of a to-be-treated aqueous solution containing new pollutants to 4-10; s2, adding a sodium hypochlorite oxidizing agent into the aqueous solution to be treated and continuously stirring; and S3, carrying out a reaction under the ultraviolet wavelength of 200 to 230 nm. Compared with the prior art, the method has the advantages that the far ultraviolet light source and the sodium hypochlorite are jointly applied, so that the oxidation capacity of the sodium hypochlorite is improved, meanwhile, the high-energy characteristic of far ultraviolet light is fully played, efficient photocatalytic degradation of new pollutants difficult to degrade is realized, and the overall water treatment efficiency is remarkably improved.

The invention belongs to the technical field of photocatalysts, and particularly discloses a CoMo6 / Fe3O4 (at) ZnO composite material and a preparation method and application thereof.The photocatalytic mechanism of the prepared CoMo6 / Fe3O4 (at) ZnO composite material is as follows: after the composite material CoMo6 / Fe3O4 (at) CeO2 is excited by light, photo-induced electrons on CoMo6 are transferred to the surface of Fe3O4 (at) ZnO, meanwhile, photo-induced holes absorb an electron donor H2O on the surface of POM polyanions to react to generate. OH, and the CoMo6 / Fe3O4 (at) ZnO composite material is obtained. The. OH free radical with strong oxidation capability oxidizes eosin B to generate oxidation products such as CO2 and the like. In the experiment, a small amount of electrons absorb an electron acceptor O2 and reduce the electron acceptor O2 to generate. O2 <->, and the two free radicals act at the same time to promote the photocatalytic reaction. When a magnetic field is added outside, the oxidation capacity and rate of. OH are also accelerated, so that the degradation rate of eosin B is improved; the highest degradation rate on an eosin B dye can reach 92.21%; after an external magnetic field is applied, the degradation rate is obviously accelerated, and the reaction is almost complete 40 minutes after illumination is started.

The invention relates to the technical field of carbon fiber spinning composite material production, and discloses a special production device for a carbon fiber spinning composite material, the special production device comprises a pre-oxidation furnace and a carbonization furnace, the pre-oxidation furnace is located on the horizontal left side of the carbonization furnace, and an unwinding roller is installed on the horizontal left side of the pre-oxidation furnace; a plurality of groups of polyacrylonitrile tows on the unwinding roller penetrate through the inner rotary drum seat to enter an oxidation chamber of the pre-oxidation furnace; and an inlet and an outlet are respectively formed in the middle positions of the left end surface and the right end surface of the carbonization furnace. According to the special production equipment for the carbon fiber spinning composite material, the pressure wheel on the anti-shrinkage structure makes contact with the lower end face of the polyacrylonitrile tow, the tension spring sequentially acts on the pressure wheel, the polyacrylonitrile tow is expanded, and therefore the shrinkage amount of the polyacrylonitrile tow is counteracted; meanwhile, the air outlet short pipes are evenly distributed on the two sides of the anti-shrinkage structure, direct air blown upwards directly acts on the lower end face of the polyacrylonitrile tow, and stretching and expansion of the linear polyacrylonitrile tow are assisted.

The utility model relates to a system for treating sludge drying flue gas based on hydrodynamic cavitation. The system comprises cyclone dust removal equipment, a centrifugal fan, spray washing equipment, hydrodynamic cavitation equipment, a gas-liquid separator and an activated carbon adsorber which are connected in sequence, one end, far away from the spraying and washing equipment, of the liquid discharging pipeline is connected with the water tank, an inlet of the filtering equipment is provided with a first pipeline connected with the water tank, an outlet of the filtering equipment is provided with a second pipeline connected with the reaction liquid storage tank, and an outlet of the reaction liquid storage tank is provided with a third pipeline; a delivery pump is arranged at one end, far away from the reaction liquid storage tank, of the third pipeline, a fourth pipeline connected with the hydrodynamic cavitation equipment is arranged at an outlet of the delivery pump, and the ozone generator is connected with the fourth pipeline through a fifth pipeline. The ozone is coupled in the hydrodynamic cavitation section, so that the mass transfer effect of the ozone can be enhanced, the oxidation effect of the ozone is further enhanced, and the effects of short reaction period, high stability, low cost and high efficiency are achieved.

The invention relates to a method for extracting vanadium and chromium through self-catalysis of vanadium-containing and chromium-containing mud reinforced by micro-nano bubbles in an alkaline solution, which comprises the following steps: introducing micro-nano oxygen-containing bubbles into mixed slurry of the alkaline solution and the vanadium-containing and chromium-containing mud to carry out synchronous reaction which comprises a Fenton-like reaction and an alkaline leaching reaction which are synchronously carried out, and in the synchronous reaction process, an alkali solution and vanadium-containing and chromium-containing sludge are intermittently supplemented, and a vanadium-containing and chromium-containing leaching solution is obtained. According to the method, active oxygen generated by strengthening of the microbubbles and hydroxyl free radicals generated by Fenton-like reaction are used for jointly strengthening damage of phase structures containing vanadium and chromium in the sludge containing vanadium and chromium, and oxidation dissolution of vanadium and chromium is promoted. And efficient leaching of vanadium and chromium in the vanadium-containing chromium mud is achieved under the conditions of low alkali concentration and low temperature, and industrial large-scale production is easy to achieve.

The application discloses a nuclide synthesis hot chamber convenient to clean and a cleaning method thereof, which comprises a synthesis chamber, an exhaust mechanism arranged on the top of the synthesis chamber, and a cleaning mechanism arranged on the inner side of the synthesis chamber. The synthesis chamber comprises a synthesis cavity, a partition plate arranged in the synthesis cavity, and an ultrasonic cleaner arranged at the bottom of the partition plate. The ultrasonic cleaner is arranged in a plurality of pieces and is fixedly connected to the bottom of the partition plate uniformly. A laser three-dimensional scanner is fixedly connected to the top of the synthesis cavity. The exhaust mechanism comprises a gas storage cavity, a main pipeline arranged on one side of the gas storage cavity, and a gas conveying assembly arranged in the gas storage cavity. The main pipeline is used for conveying the gas in the gas storage cavity to the synthesis chamber and exhausting the residual gas in the synthesis chamber. The cleaning mechanism is mainly used for conveying cleaning liquid to the synthesis chamber to clean the synthesis chamber. The combination of nitrogen and ultrasonic waves improves the cleaning degree of the synthesis chamber and reduces the residual toxic gas.

The invention relates to a method for adjusting the norfloxacin removal performance of ferrate based on buffer salts, and belongs to the technical field of novel pollutant environmental protection, and the method mainly comprises the following steps: preparing different types of buffer salts, and calculating the norfloxacin removal rate to evaluate the norfloxacin removal performance of ferrate in different buffer systems.

The invention relates to a halogen-doped delta-MnO2 catalyst and an application thereof. The halogen-doped delta-MnO2 catalyst is prepared from raw materials containing potassium permanganate and ammonium halide, the application of the halogen-doped delta-MnO2 catalyst in activation of peroxymonosulfate comprises the following steps: firstly, adding the halogen-doped delta-MnO2 catalyst into bisphenol A raw water, uniformly stirring and mixing, then adding a peroxymonosulfate solution, and stirring and reacting to obtain a bisphenol A-removed water body. The halogen-doped delta-MnO2 catalyst has the advantages of being high in catalytic activity, capable of being recycled and beneficial to improving the water treatment efficiency of a PMS advanced oxidation technology, peroxymonosulfate can be efficiently activated so as to remove bisphenol A in water, operation is easy, energy is saved, and environment friendliness is achieved.

The present invention belongs to the technical field of sewage treatment, especially to an oxidation-reduction device and method for treating high-concentration toxic and harmful industrial sewage. In view of the poor contact effect between ozone and sewage at the bottom during oxidation, which results in the inability to effectively oxidize pollutants inside the sewage at the bottom, and thus is not conducive to subsequent reduction operations, the following scheme is proposed, including a mounting base, the top of which is fixedly connected to two support frames. The oxidation-reduction device and method for treating high-concentration toxic and harmful industrial sewage disclosed in the present invention have the function of increasing the sewage treatment effect. During the oxidation operation, the device can extract and lift the sewage at the bottom, and discharge it after lifting, so that the sewage at the bottom contacts with the ozone in the rising process, thereby increasing the contact effect between the sewage and the ozone during oxidation, thereby increasing the oxidation effect, and improving the subsequent reduction effect, and increasing the use effect of the device.

The application relates to a method for controlling edge grain defect of oriented silicon steel, characterized in that the method comprises the following steps: coating a set amount of grain defect control slurry in a set range of the inner ring and / or the outer ring of the upper end face and / or the lower end face of an oriented silicon steel coil to reduce the edge grain defect occurrence rate of the oriented silicon steel; and covering the whole end face of the upper end of the steel coil with a metal cover plate on the upper end cover of the steel coil. The method coats the grain defect control slurry in a certain area of the upper and / or lower end face of the steel coil, so that the grain defect control slurry can increase the local interlayer oxidation of the strip steel at high temperature, and then increase the bottom layer reaction, so as to control the width and length of the edge grain defect.

The utility model discloses a wine decanter. The wine decanter comprises a pot body, a flow diffusing plate and a negative ion generator, the pot body is provided with a wine decanting cavity and a liquid inlet, the liquid inlet is communicated with the wine decanting cavity, the flow diffusing plate is arranged at the liquid inlet and provided with a plurality of flow diffusing holes formed at intervals, the negative ion generator is arranged on the pot body, and a release terminal of the negative ion generator extends into the wine decanting cavity. According to the decanter, the oxidation effect of wine in the decanter can be improved, and the decanting time can be shortened.

The invention discloses a lubricating oil high-temperature antioxidant additive package and application thereof, and belongs to the technical field of lubricating oil, the antioxidant additive package is composed of an amine antioxidant, a phenol antioxidant, a heterocyclic antioxidant, a self-made high-temperature antioxidant, a metal deactivator and a solvent. The self-made high-temperature antioxidant has excellent high-temperature oxidation resistance, is better than a phenol antioxidant in high-temperature oxidation resistance, is better than a traditional amine antioxidant in dispersity and less in oil sludge, is smaller than a heterocyclic antioxidant in corrosion to equipment, and has higher oxidation performance and less oil sludge compared with thiophenazine; through reasonable compounding of various antioxidants, the oil product has better high-temperature oxidation resistance, extreme pressure wear resistance and corrosion resistance, lower high-temperature evaporation loss and longer service life.

The invention relates to the technical field of oil and gas fracturing flow-back fluid treatment, and particularly discloses a boron-doped diamond electrode electrooxidation system and method for treating fracturing flow-back fluid. According to the method for treating the fracturing flow-back fluid, before the fracturing flow-back fluid enters an electrooxidation unit, sulfide is efficiently removed, poison and competitive oxidation of the fracturing flow-back fluid to an electrode are eliminated, a BDD electrode is protected, a foaming agent is synchronously removed through aeration enrichment, the problem of foam interference in the flow-back fluid treatment process is fundamentally solved, and continuous and stable operation of a system is guaranteed; after the electro-oxidation unit, active chlorine (pypocholoride / chlorine) is effectively removed and recycled, so that waste is treated by waste, the oxidation efficiency is improved, and the dosage of chemicals is reduced. Through the collaborative design, the interference and foam problems of sulfide with high chloride ion content and strong reducibility are collaboratively optimized, and the treatment efficiency, economical efficiency and stability of the system are integrally improved.

The invention relates to the technical field of solid hydrogen storage, and discloses an iron-based / graphene catalyst and a preparation method and application thereof, and the iron-based / graphene catalyst comprises a graphene carrier and a FeF2 / FeOX heterojunction loaded on the graphene carrier. The preparation method comprises the following steps: uniformly mixing FeF3. 3H2O, small molecular alcohol and graphene to obtain a precursor solution; the precursor solution is subjected to a hydrothermal reaction at 190-240 DEG C for 20-36 h, and the iron-based / graphene catalyst is obtained. The iron-based / graphene catalyst provided by the invention is a graphene-loaded FeF2 / FeOX heterojunction, has a rich interface, and can provide relatively high catalytic activity. According to the prepared composite hydrogen storage material, various uniform and stable catalysts including FeB, Fe2B and Li3BO3 are formed in situ in the first hydrogen desorption process, all the catalysts have a synergistic effect, the hydrogen desorption temperature of LiBH4 is reduced, the hydrogen desorption speed is increased, and good low-temperature dehydrogenation performance is shown; meanwhile, the reversible hydrogen storage performance of LiBH4 is effectively improved.

The application discloses a kind of hollow plate carbon membrane water treatment device and water treatment method thereof.Hollow plate carbon membrane is parallelly assembled in the order of anode and cathode, and membrane assembly is immersed in water tank when operating.Anode carbon membrane is connected with water pump through permeate pipe, and cathode carbon membrane is connected with aeration device through aeration pipeline.Water treatment method is as follows: wastewater to be treated is added into reaction tank through water inlet, power supply is started, and aeration device is opened to carry out cathode carbon membrane aeration.Cathode generates electrofenton reaction, generates ·OH to degrade organic pollutants in water.Then water pump is started, and wastewater is permeated from anode carbon membrane surface to channel, and further oxidizes and degrades pollutants under the action of anode electrocatalytic oxidation.Processed water reaches water outlet through filtration from anode carbon membrane channel.The water treatment device is suitable for advanced treatment of organic wastewater, and has the characteristics of easy assembly, easy cleaning and easy scale use.

The invention relates to the technical field of sludge anaerobic digestion, and discloses a sludge reduction anaerobic digestion method, which comprises: (1) adding calcium peroxide into dewatered sludge, and carrying out a hydrolytic acidification reaction to obtain pretreated sludge; (2) carrying out anaerobic digestion on the pretreated sludge, taking 24 hours as a cycle, and carrying out heat exchange treatment on the obtained inoculated sludge 3-5 cycles after sludge feeding; (3) adding sodium persulfate into the inoculated sludge, stirring and then carrying out ultrasonic treatment to obtain mixed sludge; and (4) carrying out anaerobic digestion on the mixed sludge. According to the invention, calcium peroxide is added to pretreat dewatered sludge, and sodium persulfate is added after anaerobic digestion is carried out for a period of time, so that the oxidability of refractory organic matters can be enhanced, the influence of generated free radicals on sludge floccules is enhanced, interaction is promoted, and the treatment effect is improved. Organic matters in the sludge particles are further degraded, and the biogas yield is obviously increased in the subsequent anaerobic digestion process.

The invention discloses a microfiller for culturing sewage treatment aerobic granular sludge and a preparation method of the microfiller, belongs to the technical field of sewage treatment, and relates to the microfiller for culturing the sewage treatment aerobic granular sludge. The invention aims to solve the problems of long granulation time and poor stability in the prior art. The microfiller for culturing the aerobic granular sludge for sewage treatment is prepared by uniformly mixing one or more of straw powder, beneficial metal salt and red mud with plastic particles, heating, melting and granulating to obtain fine particles rich in organic matters, and aging the fine particles rich in organic matters by ultraviolet light. According to the microfiller disclosed by the invention, an internal core of the aerobic granular sludge is formed in a form of rapid colonization of microorganisms, and a novel aerobic granular sludge system with a stable core is formed through induction, so that the bottleneck problems of long granulation time (2-5 months) and poor stability existing in an aerobic granular sludge technology at present are solved.

The present invention provides a plant lactobacillus IOB602 for improving the protection mechanism of retinal cells under blue light and its application, which relates to the technical field of microorganisms. Lactiplantibacillus plantarum , the deposit number is CGMCC No.16021. The bacteria increased the activity of retinal epithelial cells, reduced the content of proinflammatory factors IL-6, IL-1β and TNF-α, relieved inflammation, helped to restore the expression of antioxidant enzymes, and effectively improved macular edema by reducing the content of vascular endothelial growth factor; increased the activity of catalase, superoxide dismutase and glutathione peroxidase; reduced the content of proinflammatory factors IL-6, IL-1β and TNF-α in mouse serum, and regulated the body's immune system, thereby enhancing the protection mechanism of retinal cells in a blue light environment.

The invention discloses a modification method for increasing the content of calcium sulfate in semi-dry flue gas desulfurization gypsum, and belongs to the technical field of resource utilization of flue gas desulfurization gypsum. The modification method comprises the following steps: (1) dipping and calcining the electrolytic manganese leaching residues to obtain a modified catalyst; (2) mixing the semi-dry flue gas desulfurization gypsum with water to prepare slurry; (3) introducing electrolytic flue gas into the slurry, adding glacial acetic acid and a modified catalyst at the same time until the pH value of the slurry is 6, continuously introducing air for 12 hours, and stopping introducing gas; and (4) standing and precipitating the slurry, then carrying out solid-liquid separation on the slurry to obtain a precipitate and a supernatant, and drying the precipitate to complete modification. According to the method, the semi-dry method FGD gypsum solid waste is modified through synergism of various wastes, the content of available effective components in the FGD gypsum is effectively increased in a manner of treating wastes with wastes, and a good foundation is laid for resource utilization of the FGD gypsum.

The invention relates to the technical field of roasting devices, in particular to a gasification filter residue roasting device which comprises a roasting furnace body, a feeding pipe is fixedly inserted into the upper end of the roasting furnace body, a discharging seat is fixedly mounted at the lower end of an inner cavity of the roasting furnace body, and a discharging pipe is fixedly inserted into the bottom of the discharging seat. The lower end of the discharging pipe downwards penetrates through the bottom of the roasting furnace body and extends to the outside, a Z-shaped chain bucket conveyor is installed near the roasting furnace body, a feeding port of the Z-shaped chain bucket conveyor is connected with a discharging port of the stock bin, and the side face of the roasting furnace body is connected with a cyclone separator through a pipeline; the gasification furnace has the beneficial effects that the output shaft of the variable frequency motor firstly drives the center shaft to rotate clockwise or anticlockwise, and the center shaft drives the material spreading mechanism to rotate clockwise or anticlockwise along the upper end of the furnace hearth, so that a material spreading push plate in the material spreading mechanism can uniformly spread and turn over gasification filter residues, and the gasification filter residues can be uniformly heated; and the roasting and oxidizing efficiency and effect of the gasified filter residues are improved.

The invention relates to the technical field of automobile exhaust purification and discloses a catalytic oxidation catalyst as well as a preparation method and application thereof. The invention relates to a catalytic oxidation catalyst, which comprises a carrier, a first coating and a second coating, the carrier is a regular structure carrier; the first coating comprises first cerium-zirconium composite oxide and / or first modified aluminum oxide and first precious metal, and the first precious metal is Pd and / or Pt; the second coating comprises at least one of a transition metal oxide, a second cerium-zirconium composite oxide and a second modified alumina, and a second noble metal, the second noble metal is Pd or Pt, the total amount of the first noble metal and the second noble metal is not higher than 20g / cft by element on the basis of the total amount of the catalyst, and the catalyst does not contain a molecular sieve. According to the catalyst, coating distribution is optimized based on reaction chemical characteristics in the tail gas treatment process, the effect of reducing the total content of precious metal is achieved, and wide application prospects are achieved.

This invention discloses a method for improving the bioleaching efficiency of heavy metal contaminated soil using a carbon rod electrode system modified with graphene oxide (GO). The invention involves preparing a carbon nanomaterial, GN-GO, from traditional graphene rod electrodes using a GO suspension through a multiple soaking and drying process. The GN-GO material is then used as the anode, and the unmodified graphene rod electrode as the cathode. The anode and cathode, connected to an external power source via wires, are placed in a container containing a culture medium and a heavy metal contaminated soil sample. An acclimatized bacterial strain is then introduced, and leaching is performed at 25–30°C and 120–150 r / min. This invention improves the conductivity and specific surface area of ​​the electrode by altering the electrode surface structure of the bioelectrochemical system, while simultaneously optimizing the biocompatibility of the electrode material. The method combines electrochemical and biological approaches, resulting in high remediation efficiency and good remediation effects for heavy metal contaminated soil.

The invention relates to the technical field of catalyst preparation, and discloses a preparation method of a manganese-based catalyst, the prepared catalyst and application, the method comprises the following steps: (1) mixing a mixed solution containing MnO2 and a noble metal precursor hydrolysis auxiliary agent with a noble metal precursor, and separating to obtain a solid product; and (2) washing and calcining the solid product in the step (1) to obtain the manganese-based catalyst, in the step (1), the mass ratio of the noble metal precursor to MnO2 (metered by metal elements) is (0.0005-0.03): 1. According to the method, monatomic dispersion of noble metal is realized on the surface of a MnO2 carrier by regulating and controlling the hydrolysis process of a noble metal precursor, the manganese-based catalyst is obtained through calcination treatment, and the prepared catalyst effectively reduces the CO catalytic oxidation reaction temperature.

The application discloses a kind of adjustable defect sub-nanometer gold load nickel iron composite photoanode catalyst, preparation method and application, deionized water is introduced into nitrogen and is deoxidized, multi-walled carbon nanotube treated by strong acid is placed in deionized water after deoxidation, after ultrasonic dispersion is uniform, together with FeCl2, NiCl2, HMT and ammonium fluoride is added into reaction kettle, reaction is carried out at 120 DEG C for 6 hours, after cooling, it is taken out, using deionized water is filtered, washed after, HAuCl4 is quickly added, sealed and is stirred in dark room, after reaction is finished, it is filtered, washed, nitrogen is dried at room temperature and is preserved in oxygen-free atmosphere.The application is synthesized Au / NiFe (hydroxyl) oxide / CNT composite catalyst by in-situ oxidation technology one step.The method can be simultaneously controlled on the basis of heterojunction Defects, the synergistic effect of both makes the catalyst performance be further optimized.Synthesis method is simple and direct, and catalytic effect is obviously improved.

According to the material with the photoelectric coupling catalytic performance and the preparation method thereof, raw materials used in the process are low in price and easy to obtain, carbonized alginate aerogel is used as a material substrate, the material substrate is of a porous structure, rich functional groups exist on the surface, and adsorption and degradation of pollutants are facilitated; and the good conductivity is beneficial to transfer of photon-generated carriers and conduction of electrons in electrochemistry. Meanwhile, excessive zinc nitrate and ferric nitrate on the surface are decomposed at high temperature to generate P-type semiconductor zinc oxide and ferric oxide, P-N heterojunction is formed by the P-type semiconductor zinc oxide and ferric oxide and TiO2, and the number and oxidability of photo-generated holes on the surface of titanium dioxide are greatly improved. And secondly, due to the existence of an electric field in the reactor, anions such as Cl <-> are enriched at the anode and are oxidized into active substances such as Cl <-> by photo-generated holes on the surface of the anode, the active substances are used for oxidizing organic pollutants, and the electrochemical oxidation potential is controlled by changing the voltage, so that byproducts of salt ion free radical oxidation are reduced, and effective circulation of Cl <-> / Cl <-> is promoted.

The invention relates to the field of waste gas purification, and discloses a composite metal oxide catalyst, a preparation method and application thereof, and a method for synergistically purifying carbon monoxide and volatile organic compounds. The invention relates to a composite metal oxide catalyst, the catalyst comprises manganese oxide and M metal oxide, the M metal is selected from at least one of Fe, Co, Ni, Cu, Zn, Ag, Zr and Mo; wherein in the catalyst, the defect oxygen accounts for not less than 15% of the oxygen species in the catalyst. The composite metal oxide catalyst provided by the invention is applied to synergistic purification of carbon monoxide and volatile organic compounds, and has the advantage of good removal effect of carbon monoxide and volatile organic compounds.

The invention relates to the technical field of wastewater treatment, and specifically discloses a method for treating refractory organic wastewater. The method comprises the following steps: pumping wastewater into an anaerobic tank with a residence time of 0.5-2.0h; pumping effluent from the anaerobic tank into an anoxic tank with a residence time of 0.5-3.5h; pumping effluent from the anoxic tank into an aerobic tank with a residence time of 4-12.0h, and refluxing a mixed solution to an anoxic reaction tank with a reflux ratio of 100-500%; pumping effluent from the aerobic tank into a secondary sedimentation tank with a residence time of 1.0-4.0h; pumping precipitated effluent from the secondary sedimentation tank into an ozone ultrasonic reaction tank with a reaction time of 0.2-1.0h; pumping oxidized effluent into a pH adjustment tank to adjust the pH to 3.0-5.0; and pumping oxidized effluent into an ultraviolet oxidation tank for oxidation treatment. In this invention, part of the organic pollutants are removed through the anaerobic-anoxic-aerobic combined process, and then the purpose of harmless treatment is achieved through two treatment processes: ozone-ultrasound synergistic process and ultraviolet-persulfate-hydrogen peroxide composite process.