98 results about "Ferric ion" patented technology

The invention relates to the technical field of wastewater treatment and resource recovery, and discloses an organophosphorus degradation and recovery system based on double-cathode electro-Fenton reaction, comprising: an electrolytic tank for accommodating organophosphorus wastewater to be treated; the anode is arranged in the electrolytic tank and is electrically connected with an anode of a power supply; the oxidizing agent generating cathode is arranged in the electrolytic tank and is used for generating hydrogen peroxide in situ under a power-on condition; the metal reduction cathode is arranged in the electrolytic tank and is used for adsorbing and reducing ferric ions; the metal source is composed of zero-valent iron or iron alloy, is not directly and electrically connected with the power source, and is arranged in an electric field acting area established by the anode and the at least one cathode. Through the design of inductive slow-release iron supply and double-cathode collaborative circulation, a series of problems of uncontrollable iron ion release, high iron sludge yield, low catalyst utilization efficiency, difficulty in resource recovery and the like in the traditional electro-Fenton technology are effectively solved.

The invention discloses a method for separating vanadium and iron in a high-iron-vanadium electrolyte. The method comprises the steps of pH regulation and control, iron removal, vanadium extraction and vanadium reverse extraction. In the step of iron removal, an iron ion targeted complexing agent and a solid phase adsorbent are added into the high-iron vanadium electrolyte with the pH adjusted, reaction is conducted for 10-15 min under stirring, then direct filtering is conducted, and low-iron vanadium electrolyte and a solid phase are obtained; in the vanadium extraction step, vanadium in the low-iron vanadium electrolyte is extracted by adopting a mixed solvent of pretreated P204, TBP and sulfonated kerosene, and a vanadium-containing organic solution is obtained; and the vanadium reverse extraction comprises the step of carrying out reverse extraction on the vanadium-containing organic solution through a sulfuric acid solution with the concentration of 2.0-5.0 mol / L to obtain a vanadium electrolyte. The method can be used for treating iron ions in all valence states, particularly ferric ions which are easier to extract than vanadium ions, qualified vanadium electrolyte with the iron ion concentration meeting the industrial standard can be directly obtained after reverse extraction, and a complexing agent and an adsorbent can be recycled.

The invention discloses a method for reducing the content of iron in rare earth chloride, which comprises the following steps: step 1, adding alkali slurry into heavy sand slurry containing ferrous ions to adjust the pH value to 1-2, then adding an oxidizing agent, and reacting for 2-3 hours at the temperature of 30-45 DEG C to oxidize the ferrous ions into ferric ions to obtain first rare earth slurry, the concentration of ferrous ions is 0.1-0.2 g / L; 2, the pH value of the first rare earth slurry is adjusted to 3.8-4.2, a reaction is conducted for 1.5-2.5 h at the temperature of 62-68 DEG C, so that ferric ions form precipitates, and second rare earth slurry is obtained; 3, carrying out solid-liquid separation on the second rare earth slurry to obtain an optimal solution filtrate and a filter cake; and step 4, performing removal, solid-liquid separation, evaporation and concentration on the optimal solution filtrate to obtain a rare earth chloride product with the iron content lower than 0.05%. The invention aims to introduce hydrogen peroxide in the thorium neutralization and deposition stage to reduce the accumulation of iron impurities in the circulation process.

The invention discloses a fluorescent probe for targeting mitochondrial ferric ions as well as preparation and application of the fluorescent probe. The fluorescent probe is prepared by reacting cucurbit [7] uril with (E)-4-(4-(dimethylamino) styryl)-1-(3-(triphenylphosphonium) propyl) pyridine-1-onium bromide according to a molar ratio of 1: 1. The fluorescent probe can be used for detecting Fe < 3 + > ions, and has the characteristics of simple preparation method, convenience in operation, high sensitivity, high selectivity, low cost and rapidness in detection.

The invention discloses a method for precipitating iron through ultrasonic enhanced oxidation, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: performing ultrasonic treatment on a mixed system of an iron-containing zinc sulfate solution and an oxidizing agent under an acidic condition, efficiently catalyzing ferrous ions (Fe < 2 + >) to be oxidized into ferric ions (Fe < 3 + >) by utilizing an ultrasonic cavitation effect, and promoting the ferric ions to be stably precipitated in a goethite (alpha-FeOOH) form; after the reaction is completed, carrying out solid-liquid separation to obtain a low-iron zinc sulfate solution and goethite slag; compared with a traditional jarosite method and a hematite method, the method has the advantages that exogenous cations such as potassium and sodium do not need to be introduced, a high-temperature and high-pressure environment is not needed, and the oxidation efficiency can be remarkably improved and the goethite crystal form conversion can be regulated and controlled only based on the ultrasonic cavitation effect, so that the consumption of an oxidizing agent and the zinc content in the slag are effectively reduced; meanwhile, the iron grade and the filtering performance of an iron precipitation product are improved; the method is suitable for various oxidants, is high in process adaptability, has the advantages of high efficiency, greenness and economy, and has wide popularization and application prospects in the field of zinc smelting.

A method for making an iron-based oxide magnetic powder includes adding raw material solution containing trivalent iron ions, or trivalent iron ions and ions of a metal element that partially substitutes Fe sites, and an alkaline aqueous solution for neutralizing the raw material solution to a reaction system to adjust the pH of the reaction system to 1.0 or higher and 3.0 or lower. Hydroxycarboxylic acid is added to the obtained reaction solution and thereafter the pH of the reaction system is neutralized to 7.0 or higher and 10.0 or lower. The obtained precipitate of a substituent metal element-containing iron oxyhydroxide is coated with silicon oxide and then heated, whereby an iron-based oxide magnetic powder is obtained with a reduced content of fine and coarse particles, a particle shape close to a perfect sphere, and particles of ε-iron oxide in which Fe sites are partially substituted by other metal elements.

The invention provides a red foamed ceramic wall body material. The red foamed ceramic wall body material is prepared from the following raw material components in parts by weight: 50 to 78 parts of waste glass powder, 0 to 20 parts of fly ash, 10 to 20 parts of magnesium-iron hydrotalcite, 10 to 20 parts of limestone and 2 to 5 parts of borax. According to the invention, magnesium iron hydrotalcite is subjected to in-situ decomposition to generate pleonaste, the red color of ferric ions is retained, the red foamed ceramic is prepared, and black ferrous oxide or ferroferric oxide is prevented from being generated.

The invention provides a ferronickel-based oxygen evolution electrode and a preparation method thereof based on interface confinement. The preparation method of the ferronickel-based oxygen evolution electrode comprises the following steps: preparing a precursor solution containing ferrous ions and ferric ions; the foamed nickel substrate is cleaned; the cleaned foamed nickel is tightly attached to the surface of the bottom of the reaction container, the foamed nickel is immersed in the precursor solution, under the room-temperature standing condition, divalent and trivalent iron ions are induced to be subjected to a synergistic hydrolysis and coprecipitation reaction through a physical interface confinement space formed by an attached interface, and the nickel-based composite material is obtained. Therefore, a high-activity and high-uniformity nickel-iron-based (oxygen) hydroxide catalyst layer (DIC-NiFeOOH / NF) is grown on the surface of the foamed nickel in situ. The method is simple in process, green and energy-saving, and the prepared nickel-iron-based oxygen evolution electrode shows excellent performance in oxygen evolution reaction and anion exchange membrane water electrolysis.

The present invention addresses the problem of providing an acidic cleaning solution for an aluminum-based metallic material, the acidic cleaning solution being capable of suppressing foaming while achieving favorable cleaning properties. One embodiment for solving the aforementioned problem is an acidic cleaning solution for an aluminum-based metallic material that comprises 0.01-25 g / L of at least one inorganic acid selected from the group consisting of sulfuric acid, nitric acid, nitrous acid, and phosphoric acid; 0.05-4.0 g / L of trivalent iron ions; and 0.1-10 g / L of a surfactant, wherein the surfactant includes a surfactant A: a polyoxyalkylene alkyl ether having a cloud point of 80°C or more, a surfactant B: a polyoxyalkylene alkyl ether having a cloud point of 50-60°C, and a surfactant C: a polyoxyalkylene alkyl ether having a cloud point of 40°C or less, and wherein the cloud point is measured in accordance with JIS K 3211: 1990.

To provide an acidic cleaning solution for aluminum-based metal materials that can achieve desirable cleaning properties while suppressing foaming. [Solution] An acidic cleaning solution for aluminum-based metal materials comprising: 0.01 g / L to 25 g / L of at least one inorganic acid selected from the group consisting of sulfuric acid, nitric acid, nitrite, and phosphoric acid; 0.05 g / L to 4.0 g / L of trivalent iron ions; and 0.1 g / L to 10 g / L of a surfactant, wherein the surfactant comprises: surfactant A: a polyoxyalkylene alkyl ether with a cloud point of 80°C or higher; surfactant B: a polyoxyalkylene alkyl ether with a cloud point of 50°C to 60°C; and surfactant C: a polyoxyalkylene alkyl ether with a cloud point of 40°C or lower.

The invention relates to a ferrate-calcium salt enhanced turbidity removal and water purification method based on ferrous ion activation, and aims to solve the technical problems that the effluent quality is difficult to guarantee when a traditional coagulant is used for treating low-temperature low-turbidity water or algae-laden water, and particularly the turbidity is easy to exceed the standard. The invention discloses a ferrate-calcium salt enhanced turbidity removal and water purification method, which comprises the following steps of: adding a ferrous compound, a calcium salt and ferrate into low-turbidity or high-algae raw water, uniformly stirring, controlling the molar ratio of the ferrous compound to the ferrate to the calcium salt to be (0.5-1.5): 1: (2-10), and standing and precipitating to complete the enhanced turbidity removal and water purification method of the low-turbidity or high-algae raw water. Calcium ions are introduced through calcium salt so as to effectively compress double electric layers on the surface of colloid and promote destabilization and coagulation, multiple synergistic effects of oxidation, coagulation, adsorption and coprecipitation are constructed through directional activation of ferrous ions on ferrate and synergistic interaction of the calcium ions, and therefore when complex water with low temperature, low turbidity, high algae and the like is treated, the treatment effect is good, and the treatment cost is low. The deep and efficient removal of turbidity and organic matters can be synchronously realized.

This invention discloses an apparatus and process for removing sulfur dioxide from flue gas using siderite slurry, relating to the field of environmental protection technology. The apparatus comprises six major components: desulfurization, slurry circulation, slurry replenishment, oxidation, defoaming emission, and spent slurry treatment. The components are interconnected by pipelines. The process includes siderite pretreatment slurry preparation, slurry replenishment, flue gas desulfurization, sulfite oxidation, flue gas defoaming emission, and spent slurry treatment. Siderite is crushed and ground into a slurry with a specific particle size and solids content, which is then contacted countercurrently with sulfur-containing flue gas. Utilizing ferric carbonate, magnesium carbonate, and calcium carbonate in the slurry as desulfurizing agents, combined with the oxidation effect of air and ferric ions, sulfur dioxide is converted into ferric sulfate and calcium sulfate, achieving desulfurization. This invention has high desulfurization efficiency, with the sulfur dioxide content in the purified flue gas below 50 mg / Nm³. 3 It makes full use of low-grade siderite resources, and the desulfurization by-products can be utilized as resources. The process is simple and has no secondary pollution, resulting in significant economic and environmental benefits.

The invention relates to the field of lithium battery processing, and discloses high-compaction iron phosphate, a preparation method thereof and lithium iron phosphate. The preparation method comprises the following steps: 1) mixing and reacting a phosphoric acid-pyrophosphoric acid mixed solution with iron powder, and then mixing with a ferric iron source to obtain a solution containing ferric ions; wherein in the phosphoric acid-pyrophosphoric acid mixed solution, the concentration of phosphate radical is 7 to 12 mol / L, and the concentration of pyrophosphate radical is 0.01 to 0.1 mol / L; the molar ratio of the iron powder to the pyrophosphate radical is (2-8): 1; and 2) carrying out first filter pressing on the solution containing the ferric ions, reacting the obtained filtrate at 80-120 DEG C for 0.5-6 hours, then reacting at 30-60 DEG C for 0.5-2 hours, and sequentially carrying out second filter pressing, water washing, flash drying and sintering. The preparation method adopts an iron phosphate one-step synthesis route, and is short in flow and simple in process.

A luminescent material is a complex with the following structural formula: wherein R and R' are independently selected from oxygen, amino, C1-C18 straight-chain or branched alkyl-substituted amino, phosphin, C1-C18 straight-chain or branched alkyl-substituted phosphin, sulfur, and selenium; R1, R2, R3, R4, R5, and R6 are independently selected from hydrogen, C1-C18 straight-chain or branched alkyl or halogen-substituted C1-C18 straight-chain or branched alkyl, aromatic... Aromatic groups such as benzene, thiophene, and furan, n = 1–3, are used to construct cyclic ligand skeletons with different half-ring numbers. Ln is one of the following: cerium trivalent ion, europium divalent ion, ytterbium divalent ion, and samarium divalent ion. M is one of the following: manganese divalent ion, cobalt trivalent ion, chromium trivalent ion, vanadium trivalent ion, and ferric trivalent ion. X is a monovalent ion, such as halogen, cyanide, thiocyanate, isothiocyanate, etc., m = 0–3, l = 3–6. X acts as a monodentate ligand or as a bridging bidentate ligand.

The utility model discloses a phosgenation product byproduct hydrochloric acid filtering device, and aims to solve the problems of high cost, high pollution risk, non-ideal treatment effect and the like in the traditional treatment method. The device comprises a first resin column and a second resin column, a specific resin combination technology is adopted, sulfate radicals, ferric ions and organic pollutants in the byproduct hydrochloric acid are synergistically removed through the physical adsorption effect of resin, and the chromaticity and purity of the hydrochloric acid are remarkably improved. A PLC automatic control system is adopted in the device, starting and stopping of a valve and a pump are automatically adjusted according to the liquid level and hydrochloric acid transparency, and the stability and high efficiency of the purification process are guaranteed. Besides, through COD (Chemical Oxygen Demand) on-line monitoring of backwashing water, environmental protection and high efficiency of the backwashing process are ensured, the backwashing water can be recycled after being treated, and zero discharge of wastewater is realized. The device is simple in structure, convenient to operate and high in energy efficiency, and is an effective solution for treating the byproduct hydrochloric acid in the phosgenation reaction process.

This invention discloses a highly efficient method for reducing ferric ions in zinc leaching solution, belonging to the field of hydrometallurgical technology. The zinc leaching solution and zinc sulfide concentrate are placed in a closed reactor and subjected to a pressure-enhanced reduction reaction at a temperature of 100-120℃ and a pressure of 0.2-0.3 MPa to reduce the ferric ions in the leaching solution. Simultaneously, compressed air is introduced into the reaction system to prevent the generation of hydrogen sulfide gas. The reaction time is 0.5-2.0 h. The reduced reaction system is then settled and filtered to obtain the reduced solution and reduced sulfur residue. This technical solution innovatively proposes the use of compressed air for pressure-enhanced reduction of Fe in zinc leaching solution. 3+ This achieves the suppression of H2S gas generation while avoiding the reduction of Fe. 2+ It is oxidized again to Fe by a high concentration of O2. 3+ The pressurized reduction process within a closed container significantly improves reduction efficiency while enhancing the production environment. It achieves the cascade separation and enrichment of multiple metals, closed-loop circulation of the medium, and the reduction, resource recovery, and harmless treatment of slag.

The utility model relates to a decarburization biological filter which comprises a filter body and an aeration pipeline, and an aerobic filler layer and a hydrolytic acidification filler layer which are layered up and down are arranged in the filter body and are both filled with iron-carbon-based biological carrier filler. Wastewater enters from a water inlet at the bottom of the tank and flows through the hydrolytic acidification layer, iron-carbon filler releases ferrous ions and reducing active substances through a micro-electrolysis reaction in an anaerobic environment, macromolecular organic matters are decomposed into micromolecular fatty acids in cooperation with hydrolytic acidification florae, and water flows into the aerobic layer and flows into the aerobic layer. Aerobic microorganisms attached to the surface of the filler mineralize small-molecular organic matters into carbon dioxide and water under aeration oxygen supply, ferrous ions are oxidized into iron ions and flocculate and adsorb pollutants, hydroxyl radicals generated by micro-electrolysis oxidize refractory substances, the iron ions precipitate and flow back to the lower layer to form circulation, and the pollutants are recycled. A symbiotic reaction system is constructed through electron transfer between filler layers and the synergistic effect of microorganisms, deep coupling of physicochemical and biochemical reactions is achieved, the removal efficiency of refractory pollutants is remarkably improved, and the technological process is simplified.

The utility model discloses a reaction kettle for preparing an aluminum ferric chloride water purifying agent, which belongs to the technical field of reaction kettles and comprises a reaction kettle barrel, a transmission component and wall scraping components, aluminum ferric ions are contained in the reaction kettle barrel to be hydrolyzed and polymerized to form high-molecular polymers, and a plurality of wall scraping components are arranged on two first driving rods. The wall scraping assemblies on the two first driving rods are arranged in a staggered mode, the first driving rods drive the wall scraping assemblies to scrape the inner wall of the reaction kettle barrel through rotation of the transmission assemblies, materials adhering to the inner wall are hung down, and meanwhile a scraping plate is installed at the outer end of a fixing plate through a connecting block. A fixing bolt mounted on a connecting block is in sliding connection with a sliding groove in a fixing plate, and centrifugal force can be generated when a driving rod I rotates, so that the connecting block moves towards the outer side in the sliding groove through the fixing bolt, and a scraper always abuts against the inner wall of the reaction kettle barrel, and can be always clung to the inner wall of the reaction kettle barrel.

The application discloses a kind of nickel-iron layered double hydroxide / iron oxide composite material and preparation method thereof, main preparation steps are respectively configured ferric salt and triethanolamine solution;The complex solution of ferric ion and triethanolamine is obtained after triethanolamine solution is added dropwise into ferric salt solution, and then the solution is treated using microwave hydrothermal to obtain iron oxide precursor dispersion;After the mixed solution of nickel salt and triethanolamine is configured, it is added into iron oxide precursor dispersion and is mixed uniformly by ultrasonic treatment;The mixture is transferred to microwave hydrothermal reaction bottle, and then microwave hydrothermal treatment is carried out, after treatment is completed, precipitated product is washed by centrifugation using deionized water and ethanol, and finally vacuum drying obtains nickel-iron layered double hydroxide / iron oxide composite material.The nickel-iron layered double hydroxide / iron oxide composite material prepared by the microwave hydrothermal method of the application has simple preparation process and shows good electrochemical oxygen evolution activity.

The invention belongs to the technical field of coatings, and particularly relates to an anticorrosive coating based on a ferric ion fluorescent probe as well as a preparation method and application of the anticorrosive coating. The ferric ion-based fluorescent probe takes mesoporous CeO2 microspheres as a core, rhodamine-ethylenediamine fluorescent molecules are loaded in mesopores of the CeO2 microspheres, and the surfaces of the mesoporous CeO2 microspheres are sequentially coated with a chitosan layer, a sodium alginate layer and a chitosan layer. The fluorescent probe based on the ferric ions not only has corrosion resistance, but also has monitoring and early warning functions on the corrosion process. The anti-corrosion coating prepared by applying the anti-corrosion coating material synchronously integrates the three functions of corrosion early warning, damage self-repairing and long-acting corrosion prevention, breaks through the bottleneck that in the prior art, only single or partial functions can be achieved, and multi-function collaborative integration cannot be achieved, and overcomes the key defects that a traditional intelligent coating is single in function, lagged in response and short in protection service life.

The invention discloses a preparation method and application of Zr-MOF modified magnetic straw biochar filler, and belongs to the technical field of water pollution treatment and ecological remediation, the method comprises the following steps: adding powdery straw into a solution of ferrous ions and ferric ions, stirring and performing ultrasonic treatment, and performing high-temperature pyrolysis on the dried powdery straw to prepare magnetic biochar; zirconium salt, the magnetic straw biochar and terephthalic acid are added into an N, N-dimethylformamide solution, the mixture is stirred and subjected to ultrasonic treatment, then the mixture is put into a polytetrafluoroethylene reaction kettle for a reaction, after the reaction is finished, N, N-dimethylformamide and absolute ethyl alcohol are used for cleaning, and after drying, the Zr-MOF modified magnetic straw biochar filler is obtained. Plant straw is used as a biochar raw material, biochar is modified through Zr-MOF and ferric salt, the porous structure and the specific surface area of the Zr-MOF modified magnetic straw biochar filler can be remarkably improved, the structural stability and the adsorption activity of the filler can be enhanced, refractory organic pollutants in a water body are efficiently removed, and soil pollutants are adsorbed and fixed.

The application discloses a preparation method and application of a flexible disulfide bond modified hyperbranched polymer-based carbonized polymer dot, and belongs to the technical field of nano fluorescent materials, and aims to solve the problems of complicated operation, expensive equipment and low fluorescent quantum yield and insufficient sensitivity of existing carbonized polymer dots caused by difficulty in main chain flexibility regulation in traditional iron ion detection methods. The method controls the molar ratio of 1,6-hexanediamine and bisacryloyl cystamine to regulate the number of disulfide bonds of the hyperbranched polyamide-amine precursor, and then performs nitrogen hetero-Michael addition reaction with tris(2-aminoethyl)amine to form a flexible main chain structure, and then performs acid treatment, citric acid hydrothermal carbonization and ion exchange purification steps to obtain the carbonized polymer dot with high fluorescent quantum yield and main chain flexibility. The obtained material can be used for high-sensitivity quantitative detection of ferric ions in meat by-products (liver, blood and the like) and the field of microbial antibacterial.

The invention belongs to the technical field of sludge treatment, and provides a method for strengthening anaerobic fermentation of sludge by activated sodium pyrosulfite, which comprises the following steps: pretreating sludge to obtain a sludge system; adding ferric salt and sodium pyrosulfite into the sludge system to obtain an activation system; and performing anaerobic fermentation on the active system to finish the treatment. By constructing a Fe < 3 + > / sodium pyrosulfite free radical system, the dissolution of organic matters in the sludge is improved, so that the generation of short-chain fatty acid (SCFAs) in the anaerobic fermentation process is promoted. Sodium pyrosulfite is dissolved in water to form sulfite species, under the action of ferric ions, the sulfite species can generate various active free radicals through electron transfer, and the free radicals have high oxidation capacity and can destroy sludge floc structures and extracellular polymeric substances, so that cell lysis is promoted, intracellular organic substances are released, and the sludge can be degraded. The concentration of a substrate available for anaerobic fermentation is improved, and the yield of short-chain acid is substantially improved.

The embodiment of the invention provides a method for preparing benzil by oxidizing benzoin, which comprises the following steps: S1, adding benzoin and a ferric ion solution into a reaction kettle, stirring and heating for reaction; s2, sampling and layering in the reaction process, observing the color of a water phase, introducing chlorine gas into the reaction kettle when the water phase is changed from brown yellow to green, and introducing the chlorine gas below the liquid level of the reaction liquid; s3, when yellow green gas overflows from tail gas, liquid phase detection is carried out, benzoin reaction is completed, and the reaction is stopped; s4, after standing, separating liquid to obtain a lower-layer water phase and an upper-layer organic phase; wherein the lower-layer water phase is an aqueous solution rich in ferric ions, and the upper-layer organic phase is the product benzil. According to the embodiment of the invention, at least the metabolite of the ferric ions, namely the ferrous ions, is changed into the ferric ions which can be recycled.

A flow battery system with a cathode cell including a first electrode, an anode cell includes a second electrode, and a membrane between the two cells. A first electrolyte tank includes a catholyte. A second electrolyte tank includes an anolyte. The system includes two rebalancing cells. A first rebalancing cell is in fluid communication between the cathode cell and the first electrolyte tank and is configured to reduce active species from the catholyte. The second rebalancing cell is in fluid communication with the first electrolyte tank and the second electrolyte tank such that the first electrolyte tank and the second electrolyte tank are in direct fluid communication. The second rebalancing cell is configured to reduce active species from the catholyte and the reduced catholyte may be combined directly with the anolyte. The second rebalancing cell may be a chemical reactor, a catalytic reactor, or an electrochemical reactor.

The invention relates to a process for reduction leaching of zinc leaching residues, and belongs to the technical field of metallurgical engineering. The method comprises the following steps: by taking zinc leaching residues produced by zinc hydrometallurgy as objects, sequentially carrying out high-acid pre-leaching of the zinc leaching residues, pre-reduction of zinc sulfide concentrate and deep reduction of sulfur dioxide to obtain deep reduction leaching residues; and the deep reduction leaching residues are subjected to high-acid oxidation leaching, and final leaching residues and high-acid oxidation leaching liquid are obtained. Under the synergistic effect of the process steps and all parameters, the reaction characteristic difference of the fine-grain zinc sulfide concentrate and sulfur dioxide is fully utilized, the consumption of a sulfur dioxide reagent is reduced and the cost is reduced while excessive zinc sulfide concentrate is avoided and the content of zinc and iron in the final leaching slag is reduced; the technical problem that a large amount of gypsum slag is produced due to sulfate radical balancing of a zinc hydrometallurgy system is solved from the source. The method has the advantages that the zinc and iron leaching rate is high, the reagent consumption is low, the reduction degree of ferric ions in the leachate is high, and hydrogen sulfide output is avoided from the source.

The application provides a TA-Fe 3+ The application provides a composite separation membrane, a preparation method and application thereof, and a TA-Fe 3+ The preparation method of the composite separation membrane comprises the following steps: applying a polyphenolic compound, a non-ionic surfactant and trivalent iron ions to at least one side of a porous base film in a solution state to obtain a to-be-processed membrane; and performing rinsing and drying on the to-be-processed membrane to obtain a TA-Fe 3+ The application provides a composite separation membrane, a preparation method and application thereof, and a TA-Fe 3+ The composite separation membrane comprises a porous base film and a separation layer arranged on at least one side of the porous base film, the separation layer comprises a polyphenolic compound and trivalent iron ions chelated in the polyphenolic compound, and the separation layer comprises a plurality of pore structures. The preparation method is low in cost, environmentally friendly, simple in process flow and especially suitable for industrial production. The TA-Fe 3+ The composite separation membrane has good anti-pollution capacity, good dye interception rate and high salt permeation rate.

The invention relates to the technical field of environmental protection treatment, and provides a complex iron desulfurization system and a complex iron desulfurization process. The complex iron desulfurization system comprises an absorption tower, a filtrate clarifying barrel and a fiber bundle membrane reactor, a reaction cavity is formed in the absorption tower, the reaction cavity is filled with a solution dissolved with ferric ions, a first inlet is used for introducing sulfur-containing raw material gas, elemental sulfur is discharged through a fourth outlet, a fifth inlet is used for introducing air or oxygen, and a second inlet is used for introducing sulfur. The ferrous ions in the fiber bundle membrane reactor are oxidized into ferric ions, and a solution dissolved with the ferric ions enters the absorption tower through a fifth outlet. According to the complex iron desulfurization system provided by the invention, the fiber bundle membrane reactor ensures a relatively large reaction area, the structure is compact, and the occupied area is small; meanwhile, a closed and clean regeneration environment can be provided, the stability and activity of the iron ion solution are effectively maintained, and the stability of long-term continuous operation of the system is guaranteed.

This invention relates to a pH-responsive multifunctional nanoplatform M@FNPs, a drug-loaded composition MP@FNPs, its preparation method, and its applications, belonging to the fields of nanomaterials and biomedical materials technology. The preparation method of the pH-responsive multifunctional nanoplatform M@FNPs includes the following steps: in-situ doping of ZIF-8 with ferric ions during synthesis to obtain iron-doped ZIF-8; dissolving magnesium peroxide nanoparticles and iron-doped ZIF-8 in a solvent; ultrasonicating to load the magnesium peroxide nanoparticles onto the iron-doped ZIF-8; and drying to obtain the final product. The MP@FNPs of this invention, by integrating pH-responsive release, self-supply of hydrogen peroxide and oxygen, and continuous GSH depletion functions, can specifically activate a self-maintaining cascade reaction in the tumor microenvironment, disrupting the redox homeostasis of tumor cells and inducing ferroptosis, thereby effectively overcoming the resistance of tumor cells to platinum-based drugs and synergistically enhancing the efficacy of chemotherapy-immunotherapy.

The invention relates to the field of ferric ion detection, and particularly provides a fluorescent probe for detecting ferric ions as well as a preparation method and application of the fluorescent probe. The fluorescent probe shows good performance, and is low in detection limit, high in selectivity and sensitivity and strong in anti-interference capability. The preparation method comprises the following steps: dissolving 3, 6-carbazole methyl dicarboxylate and sodium hydride in an organic solvent, stirring and heating at normal temperature, slowly dropwise adding a bis (4-fluorophenyl) sulfone solution until the bis (4-fluorophenyl) sulfone solution is completely added, reacting for a certain period of time, adding an obtained product into water, stirring, filtering to obtain a brown solid, and sequentially carrying out Soxhlet extraction, column chromatography purification, stirring reflux and vacuum drying to obtain the target product. The fluorescent probe is obtained. The powdery fluorescent probe material is dissolved in water and mixed with a solution to be detected, the fluorescence emission spectrum of the mixed solution is detected, and ferric ions in the solution are detected through the change of fluorescence intensity.