93 results about "Metal leaching" patented technology

The invention relates to a method for recovering tellurium from copper anode slime through cooperation of ultrasound and hydrogen peroxide, and belongs to the field of wet metallurgy of scattered metal. The method comprises the following steps: drying and grinding copper anode slime to obtain copper anode slime powder; the method comprises the following steps: adding copper anode slime powder into a sulfuric acid solution, mixing to obtain copper anode slime slurry, adding hydrogen peroxide into the copper anode slime slurry, carrying out ultrasonic enhanced leaching for 20-160min, and carrying out solid-liquid separation to obtain a leaching solution containing copper and tellurium and high-grade valuable metal leaching residues. According to the method, hydrogen peroxide is effectively promoted to be decomposed by ultrasound to generate hydroxyl radicals, the oxidation potential of a system is regulated and controlled, copper and tellurium are selectively converted into copper ions, tellurate radicals enter a solution, and valuable elements such as gold, silver and selenium are enriched in slag; necessary heat is provided for the reaction by utilizing the heat effect of ultrasonic and heat released by chemical reaction, and extra heating is not needed; strong jet flow generated by ultrasound effectively destroys raw material inclusion and secondary wrapping, reaction mass transfer is enhanced, and the leaching rate of tellurium is increased. The method disclosed by the invention is simple in leaching process operation, low in cost and high in reaction speed.

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 a method for leaching vanadium and molybdenum metal in a failure residual oil hydrogenation catalyst through electrochemical ultrasonic strengthening, the catalyst comprises, by mass, 10-70% of Al2O3, 3-25% of V, 2-15% of Mo and 1-10% of Ni, the method comprises the steps that S1, the failure residual oil hydrogenation catalyst is ground and dried and mixed with a leaching agent according to the preset liquid-solid ratio, and leaching slurry is formed; s2, adding a leaching aid into the leaching slurry, inserting at least one pair of electrode pairs, and meanwhile, applying ultrasonic waves into the leaching slurry to perform electrochemical ultrasonic enhanced leaching; and S3, solid-liquid separation is conducted on the leaching slurry obtained after intensified leaching is completed, and vanadium and molybdenum enriched leaching liquid and leaching residues are obtained. According to the method, an electrochemical field, an ultrasonic field and a leaching aid are synergistically acted on the leaching process of the spent catalyst, so that efficient leaching and recovery of vanadium and molybdenum metals are realized at low temperature and normal pressure, and the technical problems of low leaching efficiency, high energy consumption and serious pollution in the traditional process are solved.

The invention provides a treatment method and device for intelligently and comprehensively utilizing solid waste of a thermal power plant, and relates to the technical field of resource utilization of the solid waste of the thermal power plant, and the method comprises the steps that a multi-mode sensor array detects the particle size, components and magnetic characteristics of the solid waste in real time, and slag, fly ash and desulfurized gypsum are classified through a machine learning model; constructing a virtual model by means of digital twinning, optimizing a melting temperature parameter through deep reinforcement learning, uploading monitoring data to a cloud end through edge calculation, and triggering process adaptive adjustment; iron elements are recycled by a wet high-gradient magnetic separator, copper and aluminum metals are extracted by smelting reduction of non-magnetic slag, and a composite building material is prepared from residues or 5-25mm inert slag is used as a road base; rare metals such as vanadium, titanium and nickel are extracted from residual slag through acid leaching, leaching liquid is subjected to solvent extraction or ion exchange enrichment, processing data are stored through a block chain, and traceability of the whole life cycle is achieved. The comprehensive resource utilization rate of the solid waste of the thermal power plant is remarkably improved, and meanwhile the overall treatment energy consumption is reduced.

A method of refining platinum group metal containing material in a platinum group metal refinery, the method comprising: placing the platinum group metal containing material in a furnace having a flue; thermally processing the platinum group metal containing material in the furnace; capturing flue dust passing through the flue of the furnace during thermal processing of the platinum group metal containing material, said flue dust comprising platinum group metal and base metal; treating the captured flue dust in sulphuric acid to leach the base metal into solution producing a sulphuric acid leach liquor comprising the base metal and a solid residue comprising the platinum group metal; separating the solid residue comprising the platinum group metal from the leach liquor comprising the base metal; and recycling the solid residue comprising the platinum group metal for further processing within the platinum group metal refinery to recover the platinum group metal.

A method for recycling catalytic metals comprising: collecting a plurality of spent catalytic metals, wherein the spent catalytic metals contain cathodes of NMC111, NMC622, NMC811, NCA, LCoO2, LiNi0.5Mn1.5O4, LiMnO4, LiNiO2, LiMn2O4, and / or LiMnO2 compositions; subjecting the plurality of spent catalytic metals to a green mixture, wherein the green mixture includes dihydrogen phosphite and water, phosphoric acid and water, sulfuric acid and water, hydrogen chloride and water, or nitric acid and water, at temperatures of between 80 and 120° C. to form a metal leachate solution; and recovering lithium (Li) from the metal leachate solution.

This invention discloses a method for preparing and applying a class of highly efficient catalytic materials for activating persulfate. The preparation method includes: dispersing g-C3N4 in nitric acid at room temperature, stirring, washing, and drying to obtain g-C3N4-H; placing it in an inert atmosphere and treating it at high temperature to obtain a g-C3N4 substrate; mixing it with iron salt, cobalt salt, water, and 1,10-phenanthroline to obtain a suspension; evaporating to dryness, grinding, drying, treating at high temperature, dispersing in nitric acid, washing, drying again, treating at high temperature in an inert atmosphere, and naturally cooling to obtain FeCo-g-C3N4 catalytic material. The method of this invention constructs structurally stable and highly dispersed FeCo bimetallic-nitrogen-carbon active centers on the g-C3N4 substrate; it can achieve efficient degradation of pollutants with low dosage, while the metal leaching rate is extremely low, avoiding secondary pollution; this catalytic material combines high activity, high stability, environmental friendliness, and operational economy, showing outstanding application potential in the field of advanced oxidation water treatment.

The invention relates to a metal leaching agent and a method for leaching and recovering metal from a retired photovoltaic module step by step. The metal leaching agent comprises an acidophilic thiobacillus ferrooxidans solution, a hidden acidophilic bacteria solution and a thiobacillus thiooxidans solution, the volume ratio of the acidophilic thiobacillus ferrooxidans liquid to the hidden acidophilic bacteria liquid to the thiobacillus thiooxidans liquid is (0.5-1.5): (0.5-1.5): (0.5-1.5); wherein the concentration of the acidophilic thiobacillus ferrooxidans, the acidophilic hidden bacteria and the thiobacillus thiooxidans is (1-9) * 10 < 8 > cells / mL. Furthermore, the invention provides a method for leaching and recovering metal from the retired photovoltaic module step by step. According to the method, the metal leaching agent is utilized, mild and green recovery of aluminum and silver in the decommissioned photovoltaic cell piece and full-process recovery of the decommissioned photovoltaic module can be achieved through step-by-step biological leaching, and the method has the excellent leaching effect on aluminum and silver.

This invention provides a method for recycling waste lithium batteries based on the intrinsic photogenerated electron-hole pair separation of the cathode sheet. The method involves: whole-body crushing of the waste cathode sheet containing the positive electrode active material and aluminum foil current collector to form a mixture; placing the mixture in an acid leaching solution, and then applying an external light field matching the light absorption band of the cathode material. Under illumination, the cathode material is excited to generate electron-hole pairs, where the photogenerated holes are efficiently captured and consumed by the aluminum foil. This allows the photogenerated electrons to efficiently and specifically reduce high-valence metals in the cathode material, achieving enhanced leaching of valuable metals. This invention is the first to utilize the inherent aluminum foil in the waste to construct an "intrinsic hole consumption channel," improving light energy utilization and valuable metal leaching efficiency without the need for external photocatalysts or hole-consuming agents. It achieves efficient and green recycling of valuable metals such as lithium, cobalt, nickel, and manganese under lower acid consumption and milder conditions.

The present application belongs to the technical field of wastewater treatment, and particularly relates to a method for treating organic phosphonic acid wastewater by using a supported copper monatomic catalyst, wherein persulfate and the supported copper monatomic catalyst are added into the organic phosphonic acid wastewater to degrade the organic phosphonic acid; the supported copper monatomic catalyst is a metal oxide loaded with copper monatomic atoms, wherein the loading amount of the copper monatomic atoms is 1-10 wt% of the total weight of the catalyst. Compared with the prior art, the present application solves the problem that metal ions cannot be recovered in the advanced oxidation process of the prior art in the treatment of organic phosphonic acid wastewater. The present application provides an advanced oxidation technology for organic phosphonic acid wastewater, realizes efficient and deep degradation of the organic phosphonic acid in the wastewater, can adapt to wastewater in a wide pH range, and has strong anti-interference and high selectivity after multiple degradation, with a very low metal leaching content (0.0015 mg / L).

The invention relates to the technical field of waste plastic recovery and electrochemical energy storage, and discloses a preparation method and application of a ternary MOF based on waste lithium battery oxide derivation, and the preparation method comprises the following steps: step 1, taking a waste PET plastic bottle as an organic ligand precursor, taking a nickel cobalt manganese oxide obtained by disassembling a waste ternary lithium battery as a metal source, and adding N, N-dimethyl formamide into the organic ligand precursor; adding nitric acid into a N, N-dimethylformamide / water mixed solvent to adjust the acidity and promote the leaching of metal ions; according to the preparation method and application of the ternary MOF based on waste lithium battery oxide derivation, a waste PET plastic bottle is used as an organic ligand precursor to be combined with nickel-cobalt-manganese oxide in a waste ternary lithium battery, the ternary MOF is directly synthesized through a hydrothermal method, high-value utilization of two types of typical solid waste is achieved, and the method is suitable for industrial production. Valuable metals such as nickel, cobalt and manganese in the waste lithium battery are efficiently recycled, and the metal leaching and coordination efficiency is remarkably improved.

The application provides a kind of alkali leaching recovery method of waste oxide battery positive material, comprising: with the mixed aqueous solution of glycine, alkali and oxalate as the alkali leaching bottom solution, adding waste oxide battery positive material, soluble ferrous salt into the alkali leaching bottom solution, and carrying out leaching reaction. The method can realize the reduction of high-valence metal in oxide waste lithium ion battery positive material by using the reducing property of ferrous ion, can effectively improve the leaching efficiency of valuable metal, shorten the time of alkali leaching, and obtain higher metal leaching rate. And the leaching method can effectively avoid the entry of iron ion into liquid phase in the leaching process, causing a series of problems such as difficult separation of valuable metal in subsequent process, the reagent used is simple, the method condition is simple and easy to control, the energy consumption is low, the efficiency is high, and it has considerable industrial application prospect.

This invention discloses a stable nalmefene hydrochloride injection and its preparation method, relating to the field of biomedical technology. The injection consists of nalmefene hydrochloride, sodium chloride, hydrochloric acid, and water for injection, and contains no metal ion chelating agents, with a pH value controlled between 3.5 and 3.6. The method includes: preparing the solution and adjusting the pH under high-purity nitrogen protection in a solution preparation system with low metal ion introduction risk; filtering the solution through a polyethersulfone membrane with low metal leaching, and then filling it into ampoules with a vulcanized inner surface. This invention, through the systematic integration of multiple measures such as source control of the solution preparation system, inert atmosphere protection, precise pH control, surface passivation of packaging materials, and the use of high-purity materials, synergistically inhibits the metal ion catalytic oxidation of the active ingredient, ensuring that the content of the key degradation impurity II (2,2'-bisnalmefene) remains stably below the quality standard during long-term storage, solving the problem of chemical stability control of products in chelator-free formulations, and combining safety and process robustness.

The invention discloses a method for synthesizing mesalazine and application of mesalazine. The method comprises the following steps: introducing p-nitrophenol, formic acid and a Cu-Co-coated MFI-NS molecular sieve catalyst into a continuous flow reaction zone, and sequentially carrying out electrophilic substitution and nitro hydrogenation cascade reaction at normal pressure and 50-70 DEG C; the catalyst has a micropore-mesopore stepped pore channel, and contains a Cu0 metal cluster and a framework Co < 2 + > acid site. And separating, acidifying and crystallizing the reaction liquid to obtain a finished product. According to the invention, the shape-selective selectivity and difunctional synergistic effect of the molecular sieve are utilized, high conversion rate (gt, 98%) and high selectivity (gt, 94%) under mild conditions are realized, the product purity is greater than or equal to 99.5%, and the Cu / Co residue meets the ICHQ3D standard. The catalyst can be recycled for 10 times or more, the yield is reduced by 5% or less, iron mud pollution of a traditional iron powder method and the metal leaching risk of a noble metal catalyst are thoroughly eliminated, and the method has the remarkable advantages of being environmentally friendly, efficient, low in cost, easy to industrially amplify and the like and is suitable for preparing the medicine for treating the inflammatory bowel disease.

This invention discloses a nitrogen-doped carbon-based supported cobalt catalyst and its application in the degradation of hydroxyl-containing aromatic pollutants. Targeting hydroxyl-containing aromatic pollutants, this invention uses specific conditions to prepare a nitrogen-doped carbon-based supported cobalt catalyst for activating persulfate and degrading specific organic pollutant systems. It establishes a coordination anchoring effect between cobalt and nitrogen-containing sites, improving carbon framework defects and electron transport capabilities, while reducing the risk of metal leaching. This effectively improves catalytic performance and selectivity, achieving efficient activation of persulfate under near-neutral conditions to achieve efficient degradation of hydroxyl-containing aromatic pollutants.

The invention provides a photoresponsive deep-eutectic solvent, a preparation method thereof, a leaching agent and application of the leaching agent. The photoresponsive deep-eutectic solvent comprises choline chloride, ethylene glycol, a photoresponsive additive, electrolyte salt and a low-viscosity solvent. The photo-responsive deep eutectic solvent provided by the invention not only has photo-responsiveness, but also has higher conductivity and lower viscosity; dynamic aggregation and dynamic flow characteristics under light driving can be synergistically enhanced, light-operated enhancement and dynamic regulation and control of solvent performance in the three-rare-metal leaching process can be achieved, the interfacial ion migration rate and diffusion efficiency can be improved, the mass transfer efficiency and leaching efficiency can be synergistically improved, and the separation difficulty after leaching is reduced.

The invention provides a method for strengthening leaching of valuable metal in a high-nickel lithium battery through mechanochemical coupling transient heat treatment, and particularly provides a method for recycling the valuable metal in a waste high-nickel ternary lithium ion battery. And then transient heat treatment is carried out in a Joule heat high-temperature heat field, so that the lithium component in the high-nickel positive electrode material can be transformed into lithium silicate, and meanwhile, the transition metal oxide is transformed into low-valence or simple substances.

The invention discloses a harmless and resourceful treatment process for household garbage incineration fly ash, and relates to the technical field of fly ash resourceful utilization. The process comprises the following steps: efficiently removing soluble chlorine salt in fly ash through a circulating thickening washing system to obtain dechlorinated fly ash and salt-containing wastewater; the method comprises the following steps: carrying out thickening circulation reuse on salt-containing wastewater, carrying out quality-divided crystallization evaporation on a thickening mother solution to recover salt, dehydrating a precipitate / filter-press solid, and then doping the dehydrated precipitate / filter-press solid into a dechlorinated fly ash system to realize closed-loop circulation; adding a chelating agent with a specific formula into the dechlorinated fly ash, and curing to stably cure heavy metals; the cured fly ash is subjected to heat treatment in a rotary kiln at the temperature of 600-900 DEG C for 10-30 min so as to decompose solid-phase dioxin and promote mineralization; after dioxin and semi-volatile organic compounds enter the flue gas pipeline, the dioxin and the semi-volatile organic compounds are quenched to 200 DEG C or below so as to inhibit regeneration. According to the method, the synergistic effects of heavy metal leaching standard reaching, dioxin control and fly ash resource utilization are achieved.

The present invention relates to a method for reducing the moisture content of Fe / Al residues generated in a waste lithium secondary battery recycling process and to Fe / Al residues produced thereby. More specifically, the invention relates to a method for producing Fe / Al residues with a moisture content of 50% by weight or less by applying a caustic soda slurry, prepared by diluting caustic soda with a solution containing a metal salt, to a valuable metal leaching solution to neutralize, precipitate, and wash away Fe and Al components.

The invention discloses a method for extracting metal salts and metals from polymetallic ores or polymetallic materials. The method comprises the following steps: 1) raw material pretreatment: crushing and grinding raw materials into particles; 2) full-wet dissolution extraction: leaching corresponding acid, a corresponding oxidant, a corresponding catalyst and water from the product obtained in the step 1) by using the required metal, stirring and heating to boiling until the required metal in the raw materials is dissolved in the liquid; (3) carrying out solid-liquid separation on the leached product in the previous step, and carrying out mother liquor cooling on the mother liquor subjected to the solid-liquid separation to separate metal elements which can be subjected to alum formation and metal elements which cannot be subjected to alum formation; and (4) sequentially separating out salts of metal elements capable of forming vitriol from the metals capable of forming vitriol according to a sequence from strong vitriol forming capability to weak vitriol forming capability of the metals. The problems that in the prior art, cost is high, and pollution to the environment is large are solved.

A method for recycling catalytic metals comprising: collecting a plurality of spent catalytic metals, wherein the spent catalytic metals contain cathodes of NMC111, NMC622, NMC811, NCA, LCoO2, LiNiO.5Mnl.5O4, LiMnO4, LiNiO2, LiMn2O4, and / or LiMnO2 compositions; subjecting the plurality of spent catalytic metals to a green mixture, wherein the green mixture includes dihydrogen phosphite and water, phosphoric acid and water, sulfuric acid and water, hydrogen chloride and water, or nitric acid and water, at temperatures of between 80 and 120°C to form a metal leachate solution; and recovering lithium (Li) from the metal leachate solution.

This invention provides a process and equipment for the synergistic recovery of metals from waste lithium-ion batteries through mechanical activation and photolysis extraction, relating to the field of metal material recycling technology. The process includes the following steps: Step S1, mixing ternary cathode material and lithium iron phosphate cathode material, washing and drying to remove surface dirt and residual electrolyte, obtaining a mixed cathode material; Step S2, homogenizing the mixed cathode material and ball milling to obtain a pretreated cathode material. This scheme ultimately achieves the destruction of the cathode material's crystal structure through mechanical force, increasing reactivity and metal leaching rate, reducing the amount of chemical reagents used, and utilizing the photosensitivity of ferric oxalate complexes to achieve efficient separation and recovery of iron under light conditions, avoiding the use of additional precipitants, reducing secondary pollution, and featuring advantages such as simple operation, low energy consumption, and no secondary pollution. It effectively achieves efficient separation and purification of multiple metal elements in waste lithium-ion batteries, realizing high-value recovery of valuable metals.

This invention discloses a method for the resource recovery of battery powder, belonging to the field of resource recycling technology. The method includes the following steps: adding a phosphorus-containing mixed acid solution and hydrogen peroxide to the battery powder for acid dissolution, filtering to obtain a metal leachate; adding a first pH adjuster to the metal leachate to adjust the pH to 1.5–2.7, filtering to obtain an iron-removed leachate and crude iron phosphate; adding a second pH adjuster to the iron-removed leachate to adjust the pH to 3.5–5.5, filtering to obtain a qualified leachate and hazardous iron-aluminum slag; mixing the hazardous iron-aluminum slag with a reducing agent, and then carrying out a solid-phase oxidation reaction under heating conditions to obtain a precursor; washing the precursor with hot water, filtering to obtain a metal sulfate solution and directly discardable iron-aluminum oxide slag; the method described has high recycling efficiency and can convert hazardous solid waste into general solid waste.

The invention discloses a method for treating antibiotic wastewater by activating persulfate by using carbon nanotube sealed iron-based nanoparticles, which is characterized in that peroxymonosulfate is activated by using a carbon nanotube sealed S-doped iron-based nanoparticle catalyst to degrade the antibiotic wastewater. Wherein the carbon nanotube sealed S-doped iron-based nanoparticle catalyst S-Fe-coated NCNTs is prepared by taking L-cysteine as a sulfur source, melamine as a nitrogen source and ferric nitrate as an iron source through stirring and high-temperature calcination reaction. The method has the advantages of being good in degradation effect, high in treatment rate, good in stability, low in metal leaching concentration, high in anti-interference performance, excellent in environment friendliness and the like; the catalyst shows high catalytic activity in a wide pH range, different types of antibiotics and different actual water environments, and has strong environmental adaptability.

The invention discloses a method for leaching zinc, indium, gallium and germanium from neutralized gypsum residues, and belongs to the technical field of metallurgy and chemical engineering. Comprising the following steps that neutralized gypsum residues and sulfuric acid are mixed and subjected to size mixing, the mixture is added into a reaction kettle, sulfur dioxide is introduced for reduction leaching, and reduction leaching residues and leaching liquid containing zinc, indium, gallium and germanium are obtained. Then the reduction leaching residues and a sulfuric acid solution are mixed and subjected to size mixing, the mixture is added into a reaction kettle, oxygen is introduced for oxidation crystallization, a stirring reaction is conducted, and an oxidation crystallization product and crystallization filtrate are obtained; and carrying out multi-stage countercurrent washing on the oxidized and crystallized product to obtain the byproduct gypsum. According to the method, valuable components such as zinc, indium, gallium and germanium in the neutralized gypsum residues are deeply leached in a reduction leaching and oxidation crystallization mode, meanwhile, residual calcium sulfite in the leaching residues is oxidized and crystallized into dihydrate gypsum, leaching of valuable metal is achieved, the quality of the byproduct gypsum is improved, and the method has the advantages of being short in technological process, high in multi-metal leaching rate, low in cost and the like. The grade of gypsum is high.

The invention relates to a heterogeneous asymmetric synthesis method of a chiral benzoaromatic heterocyclic compound, which comprises the following steps: under the catalysis of a heterogeneous catalyst SL-n or SL / M-n, dissolving a reaction substrate in a solvent for reaction to obtain a target product, the invention develops the heterogeneous asymmetric synthesis method of the chiral benzo aromatic heterocyclic compound, the target product can be obtained only by simple distillation after the reaction is completed by using the heterogeneous catalyst, the product separation process is greatly simplified, the ICP-OES result shows that the catalyst is not subjected to metal leaching in the reaction process, and the method is suitable for industrial production. Good stability is shown. The method shows good selectivity and catalytic activity on asymmetric hydrogenation of a series of benzoxazinone and quinoxalinone compounds, and has great industrial application potential.

The invention discloses a high-valued treatment method for a metal leaching solution of a waste ternary power lithium battery. Belongs to the technical field of lithium battery recovery and resource utilization. The method is technically characterized by comprising the following steps: (A1) taking the metal leachate of the waste ternary power lithium battery, and adjusting the pH value of a system to an alkaline range to generate a suspension A containing various metal hydroxides; (A2) centrifuging and rinsing the turbid liquid A to remove residual alkali liquor, and drying to obtain metal precursor solid powder B; (A3) calcining the powder B to obtain multi-metal oxide powder C; (A4) dispersing the multi-metal oxide powder C in a polar solvent to form uniform slurry D; and (A5) dispensing the slurry D on the surface of an iron-nickel alloy substrate, and drying to obtain the efficient catalytic electrode. The invention aims to provide a simple and efficient high-valued treatment method for the metal leachate of the waste ternary power lithium battery. The method is used for treating the power battery leachate.

The invention relates to a nitrogen-sulfur co-doped metal-free carbon material catalyst as well as a preparation method and application thereof. The preparation method comprises the following specific steps: firstly, adding dopamine hydrochloride into an alkali modified ethanol solution, magnetically stirring, dropwise adding acetone, standing and settling, centrifugally collecting a precipitate, and carrying out vacuum drying and freeze drying to obtain PDA; carrying out high-temperature calcination on PDA in an inert atmosphere, cooling, washing, and drying to obtain PDAC; and mixing and stirring the PDAC and a sulfate compound, carrying out vacuum drying, grinding, carrying out secondary high-temperature calcination in an inert atmosphere, cooling, washing, and drying to obtain the novel catalyst (PDACS). The catalyst can efficiently activate peroxymonosulfate (PMS) and selectively degrade ofloxacin (OFX) in water through a non-free radical reaction path, and is low in cost, high in stability, free of metal leaching risk and high in repeated utilization rate.

The application provides a valuable metal recovery method, which comprises the following steps: a leaching process, in which a metal-containing recovery material is contacted with an acid solution, so that the metal in the recovery material is leached into the acid solution to obtain an acid leaching solution; a removal process, in which the acid leaching solution is removed by using a first solvent to obtain a removed solution containing valuable metals, wherein the valuable metals include a first valuable metal element and a second valuable metal element, the first valuable metal element includes at least one of nickel, cobalt and manganese, and the second valuable metal element includes lithium; and an extraction process, in which the removed solution is extracted by using a second solvent to obtain an extraction solution containing the first valuable metal element and a raffinate containing the second valuable metal element, wherein the second solvent includes a pyridine-based extractant and a phosphate-based extractant. The recovery method can not only reduce the recovery cost of valuable metals, but also improve the recovery rate and utilization value.