32results about How to "Has the ability to restore" patented technology

The invention discloses a method and system for advanced treatment of leachate. The method comprises the following steps: passing the leachate to be treated into an electrolytic cell (100) for electrochemical treatment; Liquid separation, discharge the flocculated sediment / suspended matter; the effluent after solid-liquid separation is passed into the wetland purification device (200), and the leachate pollutants are degraded or removed through the laid packing layer, and finally the water is effluent; preferably , the method also includes the step of removing volatile organic compounds and malodorous gas in the leachate. In the method and system of the present invention, the pollutant content in the leachate can be effectively reduced or removed through electro-oxidation, electro-flocculation, and wetland advanced treatment, and even the air pollution caused by the leachate can be eliminated through the deodorization system, and the effective treatment of the leachate is realized. Management and disposal to ensure that leachate does not affect human health during human activities.

The invention provides a CO-SCR denitration catalyst and a preparation method and application thereof.The preparation method comprises the steps that a precipitant is added into a solution of mixed metal salt to obtain precipitate, ball-milling treatment is conducted on the precipitate to obtain powder, and the powder is heated to 450-850 DEG C to be calcined; wherein the mixed metal salt is a manganese salt and other metal salts, and the other metal salts are one or more of a copper salt, an iron salt, a cerium salt, a cobalt salt and a nickel salt. The catalyst provided by the invention hasgood water resistance, effectively solves the problem of CO + O2 competition in the CO-SCR catalytic process, and overcomes the defect of low catalytic NOx removal efficiency of an existing material under the double interference conditions of water vapor and oxygen.

The invention provides an alginate fiber functional dressing, application of the alginate fiber functional dressing and an alginate fiber functional dressing plaster and relates to the field of medical materials. The alginate fiber functional dressing is prepared from the flowing raw materials in percentage by mass, 0.5 to 2 percent of oligocarrageenan, 1.5 to 3 percent of alginate-derived oligosaccharide, 0.5 to 1.5 percent of algae polyphenol, 0.5 to 2.5 percent of procyanidine, 0.05 to 0.2 percent of sodium chloride, 0.5 to 1.5 percent of Carbomer, 0.01 to 0.1 percent of PH conditioning agent, 0.5 to 2 percent of skin adhesive, 0.01 to 0.2 percent of skin-moistening moisturizer, and the balance of water for injection. The alginate fiber functional dressing plaster comprises a dressing surface layer onto which the alginate fiber functional dressing is absorbed. The alginate fiber functional dressing can be used to effectively repair and heal a skin injury, and the wound healing time is shortened. Furthermore, the invention provides the application of the alginate fiber functional dressing to repairing and healing the skin injury.

The invention provides a Pd / NiAl metal oxide film electrode as well as a preparation method and application thereof. According to the Pd / NiAl metal oxide film electrode provided by the invention, the mass of Pd accounts for 1 percent to 10 percent of the mass of the Pd / NiAl metal oxide film electrode. According to the Pd / NiAl metal oxide film electrode provided by the invention, Ni, Al and Pd are deposited on foam nickel through in-situ hydrothermal reaction to obtain Pd / NiAl-LMO membrane electrode materials with different Pd deposition amounts. According to the Pd / NiAl metal oxide film electrode, the prepared Pd / NiAl-LMO membrane electrode can be used as a capacitive deionization electrode; when being used as a positive electrode, the Pd / NiAl-LMO membrane electrode can be used for adsorbing acid group ions in water in a charging process; when the Pd / NiAl-LMO membrane electrode is used as a negative electrode, the acid group ions are converted into a harmless product under the catalysis effect of Pd atoms in a discharging process; meanwhile, the electrode is regenerated and concentrated wastewater of acid salt is not generated in a capacitive deionization process.

The invention belongs to the technical field of natural product preparation and especially relates to a method for adsorbing and recovering a precious metal palladium by a persimmon tannin-containing metal adsorbent. The method can be widely used for adsorbing and recovering a palladium element in a secondary resource and has the advantages of low cost, large adsorption capacity, good environmental benefits and convenient operation. The method is characterized by comprising the following steps of 1, weighing a certain amount of a persimmon tannin-containing adsorbent, and adding the weighed persimmon tannin-containing adsorbent into a triangular flask, 2, adding a palladium ion-containing solution having a pH value in an appropriate range into the triangular flask, wherein the volume of the used palladium ion-containing solution is less than or equal to half of the volume of the triangular flask, 3, sealing an opening of the triangular flask by a sealing film, putting the sealed triangular flask into a shaking table, and carrying out shaking-table shaking adsorption at a shaking-table rotation rate of 100 to 200rpm at a temperature of 25 to 50 DEG C for 12 to 24h or carrying out chromatographic column adsorption at a chromatographic column mobile phase flow rate of 6 to 10mL / h for 12 to 24h, and 4, carrying out filtration so that the palladium ions in the palladium ion-containing solution are adsorbed by the persimmon tannin-containing adsorbent. The method also can be used for adsorbing and recovering a precious metal palladium by a chromatographic column.

The invention provides a visible light catalytic material and its preparation method and application, belonging to the technical field of catalysts. The visible light catalytic material provided by the present invention includes a carrier and an active component loaded on the surface of the carrier; the carrier is a conductive ceramic; the active component is P-C 3 N 4 , graphene oxide and bismuth vanadate; the raw materials for the preparation of the conductive ceramics include graphene, aluminum oxide and zinc oxide. P-C in the visible photocatalytic material provided by the invention 3 N 4 and BiVO 4 Both can be excited by visible light to generate photogenerated electrons and holes, BiVO 4 The reducing electrons on the P‑C will be transferred to the 3 N 4 On, and recombining with its oxidative holes, RGO can act as an electron transport medium to enhance the above process. The present invention adopts active components of a specific composition and a carrier to be used together, and the provided visible light catalytic material has excellent visible light catalytic efficiency and recovery efficiency.

An adsorption material for Hangjin 2# soil loaded with nanometer zero-valent iron, wherein the mass ratio of nanometer zerovalent iron to Hangjin 2# soil is 1:4‑5. The preparation method uses Hangjin 2# soil as the carrier to load nanometer zero-valent iron. The steps are as follows: 1) dissolving iron-containing oxides in ethanol solution to obtain a mixed solution; 2) adding Hangjin 2 to the mixed solution in step 1 #soil, nanometer zero valent iron and Hang Jin 2# soil mass ratio are 1:4-5; 3) pass into nitrogen in the product of step 2, stir and remove oxygen; 4) add reducing agent to the product of step 3, will Iron-containing oxides are reduced to nanometer zero-valent iron, and evenly dispersed on the surface of the carrier material Hangjin 2# soil; 5) The product obtained in step 4 is subjected to solid-liquid separation, and the solid is vacuum-dried to obtain Hangjin soil 2# soil-loaded nanometer zero-valent iron Adsorbent material for iron. The adsorption material of the invention has higher reactivity and reduction effectiveness, and has good application value in actual water pollution control and repair projects.

The invention relates to green rust-polydimethyldiallylammonium chloride in-situ composite coagulant and its preparation method and application, comprising the following steps: under stirring, Fe(II)-containing solution and dimethyl diene After the propylammonium chloride is mixed evenly, flush into nitrogen, then heat, adjust the pH value to 7, add the initiator solution, keep warm and continue the reaction. Add lye, seal and age at room temperature to get the green rust-polydimethyldiallylammonium chloride in-situ composite coagulant; dimethyldiallylammonium chloride contains Fe(II) The mass concentration in the solution is 100-300g / L; the addition amount of the initiator is 0.2-0.8% of the mass of dimethyl diallyl ammonium chloride. The in-situ composite coagulant prepared by controlling the partial oxidation of Fe(II) to Fe(III) in the in-situ synthesis process of the present invention is used for sewage treatment with a turbidity reduction rate of 95% or more, and the coagulation effect is good.

The invention belongs to the technical field of natural product extraction and utilization, and especially relates to a method for adsorbing and recovering a precious metal gold by a persimmon tannin-containing metal adsorbent. The method can be used for selectively adsorbing and recovering a gold element in a secondary resource and has the characteristics of low cost, large adsorption capacity, good environmental benefits and convenient operation. The method comprises the following steps of 1, weighing a certain amount of a persimmon tannin-containing adsorbent, and adding the weighed persimmon tannin-containing adsorbent into a triangular flask, 2, adding an alloy ion-containing mixed solution having a pH value of 2 to 4 into the triangular flask, wherein the volume of the used alloy ion-containing mixed solution is less than or equal to half of the volume of the triangular flask, 3, sealing an opening of the triangular flask by a sealing film, putting the sealed triangular flask into a shaking table, and carrying out adsorption at a shaking-table rotation rate of 100 to 200rpm at a temperature of 25 to 50 DEG C for 12 to 24h, and 4, carrying out filtration so that gold ions in the alloy ion-containing mixed solution are adsorbed by the persimmon tannin-containing adsorbent. The method also can be used for adsorbing and recovering a precious metal gold by a chromatographic column.

The present invention provides a flue gas SNCR denitrification agent and a preparation method thereof, which, calculated in parts by mass, include 80-95 parts of a reducing agent, 1-5 parts of activated carbon and 0.01-0.2 parts of a hydrogen storage metal, and the hydrogen storage metal is Pre-hydrogenation treatment, the preparation method includes: mixing hydrogen storage metal with activated carbon and then mixing with reducing agent, thereby obtaining flue gas SNCR denitration agent. The flue gas SNCR denitrification agent of the invention has a wider effective reaction temperature range, and at the same time produces less solid particles after the reaction, has stronger reducing ability to nitrogen oxides, and has a good application prospect.