942 results about "Iron chloride" patented technology

This invention discloses a method for leaching lithium iron phosphate mixed powder with iron salts and recovering all components, belonging to the field of battery recycling. The invention uses an iron salt solution to leach the mixed powder, obtaining a lithium-containing leachate and leaching residue. Ferrous ions in the leachate are regenerated into ferric iron through acidification and oxidation, and recycled for leaching the next batch of mixed powder. After reaching a preset number of cycles, the leachate is used for re-leaching multiple batches of leaching residue to improve the lithium leaching rate. Ultimately, a enriched solution containing Li, Fe, Cu, and Al and graphite-containing iron phosphate residue are obtained. Copper is recovered from the enriched solution through iron powder replacement, and a high-purity lithium chloride solution is obtained through extraction and separation, while ferric chloride (recycled) and aluminum chloride crystals are also recovered. The leaching residue is treated with hydrochloric acid to obtain regenerated graphite, and the pH is adjusted with alkali to obtain high-purity iron phosphate. This method achieves full component recovery under mild conditions, reducing separation steps and chemical consumption through a "leaching-regeneration-leaching" cycle mechanism, thus achieving both environmental and economic benefits.

The invention discloses a heavy metal chelating agent for industrial wastewater and a preparation method of the heavy metal chelating agent, and belongs to the technical field of sewage treatment.The preparation method comprises the steps that 2-hydroxyphenylboronic acid is subjected to graft modification through acrylic acid and polymerized on the surface of activated biomass porous carbon powder with acrylic acid, boron-containing polymer modified porous carbon is obtained, and then ferric chloride hexahydrate serves as an iron source; a boron-containing polymer modified porous carbon surface and aminated magnetic adsorption nanospheres are obtained, B-N coordination is formed between the aminated magnetic adsorption nanospheres and the boron-containing polymer modified porous carbon surface, boron element fixation is achieved through modified copolymerization, loss caused by long-time use of the boron element is avoided, lasting and stable chelation is guaranteed, activated biomass porous carbon serves as a carrier, and macromolecular resin serves as a coating layer. The environment-friendly biochar has the advantages of favorable degradability, greenness, degradability, safety and high efficiency, and avoids the problem of secondary pollution caused by the use of a chelating agent.

The invention provides a leakage point pressure difference response high-strength blocking agent based on iron ion dynamic cross-linked latex and a preparation method thereof, and the raw materials comprise the following components in parts: 60-120 parts of latex, 60-120 parts of deionized water, 5-15 parts of an activator, 5-10 parts of a defoamer, 100 parts of a terminator, 100 parts of a stabilizer, 10 parts of a 20% ferric chloride solution, and the balance of water. Rubber particles are dynamically crosslinked through ferric ions, and the plugging strength is remarkably improved. Compared with a traditional differential pressure plugging agent, the plugging strength for small holes with the diameter of 0.5 mm reaches 35.67 MPa and is improved by about 238%, and the plugging strength for large holes with the diameter of 1 mm reaches 9.68 MPa and is improved by about 428%. And the plugging device is suitable for plugging conditions with higher leakage point pressure difference. In addition, the plugging agent can realize rapid and high-strength plugging of an underground pipe column, and provides a more efficient and more reliable solution for well site construction.

The invention provides a material for removing sodium ions in saline-alkali soil and a preparation method, and relates to the field of sodium ion adsorbents, the preparation method comprises the following steps: (1) lignin modification: under a water bath condition, dissolving sulfate lignin in a mixed solution of analytically pure acetic acid and 30% hydrogen peroxide, then adding ferric chloride, reacting for 1.5-2.5 hours, diluting with distilled water by 7-8 times, centrifuging and washing to obtain modified lignin; drying to obtain oxidized lignin; (2) hydrogel synthesis: mixing and stirring the oxidized lignin and analytically pure acrylic acid, adding a cross-linking agent and an initiator, and reacting in a drying oven at 65-75 DEG C for 1.5-2.5 hours to form a sodium ion adsorption material with a porous interpenetrating network structure; by modifying the lignin, particularly introducing more hydroxyl and carboxyl groups, the performance of the lignin in the application of adsorbing ions, preparing hydrogel and the like can be improved.

The invention discloses a high-pressure belt conveyor low-cost sludge dewatering technology, and relates to the technical field of sludge dewatering, the technology comprises the following steps: S1, in a pretreatment stage, adding a ferric chloride agent and destroying a sludge colloid structure; s2, in the conditioning stage, lime powder is added to adjust the pH value, and a porous skeleton structure is constructed; s3, adding a polyacrylamide medicament in a flocculation stage to form a compact floc; s4, a high-pressure belt filter press is used for mechanical dehydration in the dehydration stage; s5, recovering the filtrate for redissolving the medicament; s6, performing dynamic linkage optimization of chemical dosing and filter pressing parameters through a dynamic chemical dosing algorithm of the control system; the dosage of chemicals is effectively reduced, the sludge dewatering effect is improved, the sludge dewatering treatment cost is reduced, and the cyclic utilization of resources is realized; the technical problems that an existing sludge dewatering technology is too high in agent cost, low in agent matching and combination reliability and insufficient in technology adaptability are solved.

The invention discloses a preparation method for selectively oxidizing thioether into sulfoxide through photo-initiation, and belongs to the field of synthesis of medical compounds. The preparation method comprises the following steps that in the air atmosphere, a thioether compound is dissolved in an acetonitrile-water mixed solvent, inorganic metal salt catalysts such as ferric chloride and copper sulfate are added, the mixture reacts for 8-48 h at the temperature of 0-45 DEG C under illumination with the wavelength of 295-405 nm, selective oxidation is carried out, and the sulfoxide product is obtained, and the molar ratio of thioether to the catalysts is 5: 1. The method overcomes the problems of excessive oxidation risk, complicated operation, environmental pollution and the like caused by dependence of a noble metal catalyst and use of a strong oxidant in the existing thioether oxidation method, has the advantages of high catalytic efficiency, high yield and excellent selectivity, can greatly reduce the production cost, is suitable for later industrial synthesis and amplification, and has wide application prospects. The method has the advantages of no expensive metal catalyst or oxidant, simple preparation process, high efficiency, environmental protection, safety and cost saving.

The invention discloses a chlorobenzene wastewater continuous stripping purification recovery device and an implementation method, the chlorobenzene wastewater continuous stripping purification recovery device comprises an aeration tank, an alkali water washing system, an acid water washing system, an acid-base neutralization system and a ferric hydroxide separation system, the aeration tank is connected with the alkali water washing system, the acid water washing system is connected with the alkali water washing system, and the acid water washing system is connected with the ferric hydroxide separation system. The acid-base neutralization system is connected with the alkali-water washing system, the acid-water washing system and the ferric hydroxide separation system, and the alkali-water washing system and the acid-water washing system are both in two-stage steam stripping, and have the following advantages: alkali washing water and acid washing water generated in the chlorobenzene production process are subjected to two-stage nitrogen steam stripping, so that the content of organic matters is greatly reduced; ferric hydroxide is generated through neutralization of acid-alkali wastewater, the total amount of the wastewater is reduced, then the ferric hydroxide reacts with hydrochloric acid in the pickling water to generate ferric trichloride, hydrochloric acid is neutralized, the neutralization product ferric hydroxide is consumed, the wastewater amount is reduced, and recycling of wastewater resources is achieved.

The present invention discloses a method for synthesizing 9-bromoanthracene. Anthracene and potassium bromide are used as raw materials. The final product, 9-bromoanthracene, is obtained by reacting anthracene and potassium bromide in the presence of ferric chloride and 1-acetoxy-1,2-benzidoxyl-3-(1H)-ketone. The method has the advantages of being inexpensive and readily available, easy to produce, and readily purifiable, and can be developed into an industrialized production method.

The invention relates to the technical field of electro-catalysis, in particular to a modified iron monatomic catalyst based on biomass carbon as well as a preparation method and application of the modified iron monatomic catalyst. The preparation method comprises the following steps: mixing and stirring chitosan, an acetic acid solution, thiourea and ferric chloride, adjusting the pH value to 7.5-8.5, and freeze-drying to obtain an aerogel precursor; pre-carbonizing the aerogel precursor to obtain a pre-carbonized product; mixing the pre-carbonized product with an alkali reagent, and calcining to obtain a metal nanoparticle doped monatomic catalyst; and carrying out ultrasonic treatment on the metal nanoparticle doped monatomic catalyst by using a mixed acid solution, washing to be neutral, and drying to obtain the modified iron monatomic catalyst. By adopting the modified iron monatomic catalyst provided by the invention, non-polar CO2 molecules and NO3 <-> are efficiently converted into urea under mild conditions, the yield of the urea is up to 2978.6 mu g h <-1 > mgcat <-1 >, and the maximum Faraday efficiency is up to 30.4%.

The invention provides a wide pH applicable multi-biomolecule detection MOF probe, a preparation method, a detection method and application, the probe is an MIL-53 (Fe) (at) AA (at) EZ probe, and comprises a metal organic framework MIL-53 (Fe), amino acid and enzyme; the preparation method comprises the following steps: weighing terephthalic acid and ferric chloride hexahydrate, adding into N, N-dimethylformamide, mixing and stirring, pouring the mixed solution into a stainless steel autoclave, heating and reacting, naturally cooling to room temperature, centrifugally separating a product, and washing with N, N-dimethylformamide and absolute ethyl alcohol to obtain the metal organic framework MIL-53 (Fe). The preparation method comprises the following steps: mixing a metal organic framework MIL-53 (Fe) with an amino acid solution, and carrying out ultrasonic treatment and stirring to obtain an MIL-53 (Fe) coated AA solution; the method comprises the following steps: dissolving enzyme in an MIL-53 (Fe) (at) AA solution, uniformly mixing, stirring, centrifugally separating a product, taking precipitate, and drying in vacuum to obtain the MIL-53 (Fe) (at) AA (at) EZ probe. The pH application range is wide, one-step detection can be achieved, and the method has the advantages of being rapid in reaction, high in sensitivity, low in detection limit and easy and convenient to operate.

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a manganese ferrite / bismuth tungstate heterojunction photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) dissolving sodium tungstate dihydrate, bismuth nitrate pentahydrate and hexadecyl trimethyl ammonium bromide in deionized water, and obtaining bismuth tungstate by using a hydrothermal method; 2) dissolving ferric chloride hexahydrate and manganese chloride tetrahydrate in water, then adding a sodium hydroxide solution, and obtaining manganese ferrite by using a hydrothermal method; and 3) dissolving bismuth tungstate and manganese ferrite into a sodium hydroxide solution, stirring, and drying to obtain the manganese ferrite / bismuth tungstate heterojunction photocatalyst. The formation of the heterojunction can greatly improve the activity of the manganese ferrite / bismuth tungstate in photocatalytic reduction of carbon dioxide.

The invention discloses an antistatic modified polyamide fiber and a preparation method thereof, and relates to the field of fibers. When the antistatic modified polyamide fiber is prepared, nano-silver is loaded on halloysite powder nanotubes in situ to prepare pre-modified halloysite powder nanotubes; grafting 9H-carbazole-9-formaldehyde to chitosan, and uniformly mixing the chitosan with the pre-modified halloysite powder nanotube and silver nitrate to obtain a modified halloysite powder nanotube; the preparation method comprises the following steps: reacting diethyl (hydroxymethyl) phosphate with carbazole-N-formyl chloride to obtain a functional monomer; reacting hexamethylenediamine, adipic acid, pyromellitic dianhydride and a functional monomer to prepare a modified polyamide slice; uniformly mixing the modified polyamide slices, the modified halloysite powder nanotubes, carbazole and ferric trichloride, spinning, and grafting 4-aminomethyl-2, 2, 6, 6-tetramethylpiperidine to obtain the antistatic modified polyamide fiber. The antistatic modified polyamide fiber prepared by the invention has excellent antistatic property, antibacterial property, flame retardance and aging resistance.

The invention discloses a preparation method of a CoMnFe-PBA hollow superstructure material, which combines seed induced self-assembly with an in-situ ligand / metal ion exchange growth method, and comprises the following steps: dissolving MOF-74 and potassium ferricyanide in deionized water, and carrying out ultrasonic treatment to form a solution A; dissolving polyvinylpyrrolidone, ferric chloride and manganese chloride tetrahydrate in a mixed solvent of ethanol and deionized water, and stirring for a certain time to obtain a solution B; dropwise adding the solution B into the solution A, stirring, carrying out centrifugal collection, ethanol washing and freeze drying on a reaction product, and collecting a sample to obtain the CoMnFe-PBA hollow superstructure material. According to the CoMnFe-PBA hollow superstructure material prepared through the method, a construction unit of a self-assembly superstructure is expanded to PBA nanoparticles, and the synthesis strategy, the construction unit, the structural level and the application range of the self-assembly superstructure can be further expanded.

The invention discloses a method for catalyzing and photo-initiating nitro reduction through ferric trichloride, and belongs to the field of pharmaceutical compound synthesis. According to the method, transition metal salt is mainly used as a catalyst for reaction, inorganic acid and organic acid are used as additives, nitryl is reduced into amino under the condition of air or nitrogen, the catalytic efficiency is high, the yield of reduction products is high, the production cost is greatly reduced, and the method is suitable for synthesis and amplification of later compounds and has good application prospects. The method has the advantages of no expensive metal catalyst or reducing agent, simple preparation process, high efficiency, environmental protection, safety and cost saving.

The invention belongs to the field of organic synthetic chemistry, and relates to a preparation method of melatonin and meerythrine indole derivatives and compounds. Specifically, the indole derivative is efficiently synthesized by taking arylamine and carboxylic acid as raw materials through a one-pot two-step reaction in the presence of catalysis of ferric chloride hexahydrate (FeCl3. 6H2O), a ligand, a diazotization reagent, an additive and a solvent under the conditions of visible light irradiation, inert atmosphere and room temperature. According to the method, visible light induced iron-based LMCT catalysis and iron lewis acid catalysis functions are integrated, and efficient integration of diazotization, decarboxylation, free radical coupling and cyclization reaction is achieved. The method has the advantages that raw materials are cheap and easy to obtain, reaction conditions are mild, substrate applicability is wide, functional group compatibility is good, operation is easy, convenient and safe, and environment friendliness is achieved, gram-level scale preparation can be achieved, and a green and efficient synthesis path is provided for indole compounds with biological activity such as melatonin and meerythrine.

The invention relates to the field of composite coatings, and discloses a wave-absorbing high-entropy alloy composite coating and a preparation method thereof.According to the wave-absorbing high-entropy alloy composite coating, mixed powder is deposited on the surface of a base body in a laser cladding mode to form a pre-coating, then ion nitriding treatment is conducted on the pre-coating, and the wave-absorbing high-entropy alloy composite coating is obtained. The mixed powder comprises high-entropy alloy powder, a functional additive, core-shell antifriction powder and a binder; the functional additive is prepared by taking halloysite, biomass chitosan and ferric chloride hexahydrate as raw materials, adopting a hydrothermal method to obtain an iron modified halloysite / carbon material, and then performing carbon thermal reduction reaction; the core-shell antifriction powder is prepared by uniformly stacking outer-layer aluminum oxide on the surface of nano hexagonal boron nitride by using a non-uniform nucleation method; the ion nitriding treatment process parameters are as follows: nitriding is performed for 58-62 h at the temperature of 540-560 DEG C, flow velocity thermal decomposition ammonia is adopted as a nitrogen source, and the prepared composite coating is high in hardness and good in wear resistance, corrosion resistance and wave absorbing performance.

The invention discloses a high-selectivity pyridine alkylation method which comprises the following steps: taking anhydrous titanium chloride and an anhydrous ferric chloride solution as raw materials, adding a dispersing agent, heating and uniformly stirring, adding ammonia water to adjust the pH value to a fixed value, grinding and sieving to obtain a catalyst carrier; dipping the catalyst carrier into a rare earth metal oxide solution dissolved by dilute sulphuric acid in an equivalent volume manner, aging, grinding and sieving to obtain a rare earth metal modified solid superacid catalyst; the method comprises the following steps: activating a rare earth metal modified solid superacid catalyst, cooling to a reaction temperature, filling a fluidized bed reaction tube with the catalyst, mixing pyridine and dimethyl carbonate, starting feeding, opening an air inlet valve, introducing nitrogen, and carrying out a reaction on the raw material mixed nitrogen in a catalyst layer to realize high-selectivity pyridine alkylation. Pyridine and a green methylation reagent dimethyl carbonate are used as raw materials, and high-selectivity synthesis of 2-methylpyridine can be realized under the action of a rare earth metal modified solid superacid catalyst.

The invention belongs to the technical field of environmental science and resource utilization, and relates to a rapid enteromorpha humification method and application, under the action of a catalyst, enteromorpha is humified by a hydrothermal method to obtain an enteromorpha-based bio-organic fertilizer; the catalyst is more than one of nano ferric oxide, nano ferric chloride, nano cuprous chloride and ammonium sulfite. According to the method, rapid humification of the enteromorpha is realized, the high-activity fertilizer is prepared, the pollution problem of the enteromorpha is effectively solved, and resource utilization of the enteromorpha is promoted.

The invention discloses a preparation method and application of an iron-based metal organic framework material / carbon nitride nitrogen fixation photocatalyst in the field of photocatalytic materials, the iron-based metal organic framework material / carbon nitride nitrogen fixation photocatalyst is prepared by taking ferric chloride, terephthalic acid and graphite phase carbon nitride as raw materials through a hydrothermal reaction, a heterojunction is constructed through a solvothermal method, uniform loading of MIL-53 (Fe) on the surface of b-C3N4 is achieved, and the photocatalytic performance of the photocatalyst is improved. And the formed heterogeneous interface significantly improves the photon-generated carrier separation efficiency. The obtained MIL-53 (Fe) / b-C3N4 photocatalytic composite material has good visible light response characteristic and excellent photocatalytic nitrogen fixation performance, and is safe, non-toxic, green and environment-friendly. The produced ammonia water can be directly absorbed by wheat, so that the chlorophyll content of leaves is increased by 11-13%, the plant height is increased by 19-21%, and a novel photocatalysis scheme is provided for green agriculture.

The present invention discloses a method for separating nickel and iron from a nickel-iron alloy by chlorination roasting: (1) placing the nickel-iron alloy in a roasting furnace; (2) introducing a gaseous chlorinating agent into the roasting furnace for staged roasting to obtain roasting slag and a roasting gas phase; wherein the gaseous chlorinating agent is a mixture of chlorine and gaseous ferric chloride; and (3) condensing the roasting gas phase obtained in step (2) in stages to obtain solid ferric chloride and liquid silicon tetrachloride, respectively. The present invention controls the composition of the chlorinating agent during the chlorination roasting process to achieve selective and directional volatilization of iron into the gas phase while preventing nickel from being chlorinated. Thus, nickel and iron in the nickel-iron alloy can be separated in a single step, and the process flow is short.

The invention relates to the technical field of waste drilling fluid treatment, and discloses a modifier for treating water-based drilling waste and a preparation method thereof.The modifier is prepared from, by weight, 30-40 parts of potassium persulfate, 10-25 parts of ferric trichloride, 20-40 parts of quaternary ammonium cationic polymer and 10-20 parts of magnetized modified attapulgite clay. According to the modifier for treating the water-based drilling waste, through the synergistic effect of all the components, an oxidation-catalysis-flocculation-magnetic separation four-stage synergistic treatment process is formed, the problem that gel breaking is not thorough in the water-based drilling waste treatment process is solved, the content of metal ions in a liquid phase after solid-liquid separation is reduced, and the water-based drilling waste treatment effect is improved. The water distribution requirement of the drilling fluid can be met under the condition that the liquid phase does not need to be further treated, the treatment process is simplified, and the cost is reduced.

The invention relates to the technical field of heavy metal pollution treatment, and particularly discloses a biochar material and method for adsorbing heavy metals in wormcast. The biochar material for adsorbing the heavy metals in the wormcast adopts waste green tea residues as a raw material, and after being soaked in a phosphoric acid solution with the mass concentration of 38-42%, the biochar material is subjected to heat treatment at the temperature of 540-560 DEG C to obtain P-BC powder. The P-BC powder is soaked in a metal salt solution with the total metal ion concentration being 0.8-1.2 mol / L, and under the action of a precipitator, the LDH-coated P-BC material is obtained. The LDH-coated P-BC material is mixed with a ferric chloride hexahydrate solution and a NaBH4 aqueous solution for reaction to obtain the biochar material for adsorbing the heavy metals in the wormcast, so that the fixing and stabilizing effects of the biochar material on the heavy metals in the wormcast are improved.

The invention relates to the technical field of biological materials, in particular to a PDRN porous microsphere as well as a preparation method and application thereof. The PDRN porous microspheres are prepared from the following raw materials: PDRN, an oil phase matrix, a curing agent and metal salt, the curing agent is at least one of polyethylene glycol acrylate and polylysine; the metal salt is at least one of calcium chloride, zinc chloride, magnesium chloride and ferric chloride. The PDRN porous microsphere has the advantages of being controllable in size, excellent in disintegration resistance and excellent in swelling resistance, is high in moist heat sterilization tolerance and strength, can be used as a filling material for medical beauty or an ideal candidate material of a tissue engineering scaffold, and has potential application value.

The invention discloses a natural nitrogenase-like FeMo nano-enzyme and a preparation method and application thereof, and relates to the technical field of nano-enzymes and agriculture, the method comprises the following steps: respectively dissolving 1, 3, 4-thiadiazole-2, 5-diamine, molybdenum pentachloride, ferric chloride and 2, 5-thiophenedicarboxylic acid in absolute ethyl alcohol; the preparation method comprises the following steps: adding a molybdenum pentachloride solution and a ferric chloride solution into a 1, 3, 4-thiadiazole-2, 5-diamine solution, and stirring until the solution is yellowish-brown to obtain a FeMo nano-enzyme mixed solution; and adding a 2, 5-thiophenedicarboxylic acid solution into the FeMo nano-enzyme mixed solution, stirring, and sequentially centrifuging, drying and calcining to obtain the natural nitrogenase-like FeMo nano-enzyme. The FeMo nano-enzyme has nitrogen fixation activity similar to that of natural nitrogenase, nitrogen and water can generate ammonia at normal temperature and normal pressure, and the technical problem that in-situ generation of ammonia in plants at normal temperature and normal pressure is difficult in the prior art is solved.

The invention relates to the field of electrochemical energy conversion, and discloses a method for preparing a metal-nitrogen-carbon composite electrocatalyst through molten salt circulation and application of the metal-nitrogen-carbon composite electrocatalyst, and the method comprises the following steps: step 1, synthesizing a ZIF-8 precursor with a first-level nanometer second-level micrometer structure; 2, the ZIF-8 precursor is subjected to annealing treatment under the protection of inert gas, and a zinc-nitrogen-carbon material is obtained; 3, the zinc-nitrogen-carbon material, ferric chloride hexahydrate and fused salt are mixed and dispersed, and a mixture is obtained; 4, the mixture is dried and then calcined, and a calcined product is obtained; and 5, mixing the calcined product with water. According to the method, the fused salt is recycled, so that the fused salt is efficiently recycled and can be stably recycled, compared with a preparation method of using the fused salt once, the raw material cost is reduced, meanwhile, fused salt recycling is achieved only through water dissolution and centrifugal separation, additional acid and alkali treatment is not needed, and waste liquid discharge is reduced.

The invention relates to a high-toughness anti-crack magnetic decorative film and a preparation method thereof. The decorative film is prepared from the following raw materials in parts by weight: 40 to 60 parts of poly (dihydrothiophene-vinyl ether) copolymer, 10 to 25 parts of shell layer self-assembly modified Fe3O4 nanosheets, 5 to 15 parts of polyether ester block elastomer, 0.5 to 2 parts of sodium dodecyl benzene sulfonate, 0.5 to 1.5 parts of fluorosilane coupling agent, 0.1 to 1.0 part of 2-hydroxybenzotriazole ultraviolet absorbent, 3 to 6 parts of bisphenol A type epoxy curing agent and 0.05 to 0.5 part of imidazole catalyst. The flexible copolymer is synthesized through copolymerization of dihydrothiophene and vinyl ether, the modified Fe3O4 nanosheets form a Fe3O4 structure through coprecipitation of ferric chloride and ferrous chloride and regulation and control of ammonia water, and shell self-assembly coating is carried out through tetraethoxysilane and a block micromolecule interface agent. The material has excellent tensile strength, elongation at break, magnetic adsorption force and cycling stability, and is suitable for the application fields of flexible magnetic films and high-adhesion decorations.

The invention relates to application and a method of phosphorus adsorption resin for selectively adsorbing phosphorus from phosphorus-containing wastewater. The phosphorus adsorption resin comprises weak acid cation exchange resin and Fe < 3 + > loaded on the surface of the weak acid cation exchange resin; the pH value of the phosphorus-containing wastewater is 0.8-3.0, the phosphorus concentration is 0.1-5 g / L, and the wastewater further contains 0.1-1 g / L of Ca; the phosphorus adsorption resin is prepared by the following steps: i) carrying out contact reaction on weak acid cation exchange resin and a ferric salt solution, wherein the ferric salt is selected from one or more of ferric sulfate, ferric chloride, ferric nitrate, ferric citrate and ferric tartrate; and ii) after the reaction is completed, carrying out solid-liquid separation to obtain the Fe < 3 + >-loaded phosphorus adsorption resin. According to the method, high-selectivity adsorption (larger than or equal to 95%) of phosphorus can be achieved, the phosphorus and calcium separation effect is good, the iron-calcium ratio in the phosphorus-enriched strip liquor is larger than or equal to 800, and the method can be used for preparing battery-grade iron phosphate.

The invention relates to a salt-resistant biomass interface evaporation material as well as a preparation method and application thereof, and relates to the technical field of interface evaporation materials. The preparation method comprises the following steps: mixing sunflower fiber dispersion liquid, polyvinyl alcohol and carbon-containing molybdenum disulfide, then adding glutaraldehyde, then carrying out liquid nitrogen freezing and freeze drying, sequentially soaking with a tannic acid solution, a calcium chloride solution and a ferric chloride solution, and then carrying out freeze drying. Natural sunflower fibers are used as a main framework, cotton is used as a supporting material, carbon-containing MoS2 is prepared and crosslinked with polyvinyl alcohol, a hydrophilic functional layer is constructed on the surface of the material through tannic acid, and the tannic acid is coordinated and complexed with Ca and Fe < + >, so that a more stable hydrophilic complexed coating is formed on the surface of the material; the surface wettability and the water conveying capacity of the material are further improved, meanwhile, salt crystal deposition and precipitation in the seawater evaporation process are effectively inhibited, and the oxidation resistance and the seawater corrosion resistance of the material are improved.

An iron-doped flexible supercapacitor electrode comprises a base body and electrode slurry, and the electrode slurry is bonded on the base body. The electrode slurry comprises 40-60 parts by weight of iron-doped graphite and 2-10 parts by weight of adhesive resin; the iron-doped graphite comprises ferric trichloride intercalated graphite with first-order intercalation and ferric trichloride intercalated graphite with second-order intercalation, and the particle size of the iron-doped graphite is 600-5000 meshes; and the electrode slurry forms a film on the substrate and then is treated by hydrogen peroxide. In the invention, ferric trichloride intercalated graphite is used as a main conductive filler, and eigenstate conductive macromolecules are used as a connecting agent; when hydrogen peroxide treatment is carried out, Fe < 3 + > on the graphite is used as a catalyst to catalyze decomposition of hydrogen peroxide, the decomposition of hydrogen peroxide generates water and O2, and the overflow of O2 enables the electrode slurry to form a porous structure; the graphite layer is stripped into wormlike graphite; therefore, the adsorption performance of the electrode slurry layer is improved.

The invention relates to the technical field of adsorption materials, in particular to a preparation method and application of iron-crosslinked sodium alginate modified bagasse biochar, which comprises the following steps: respectively pretreating red mud and bagasse, and then mixing the pretreated product with melamine to obtain a mixed material; the mixed material is placed in a protective atmosphere for pyrolysis treatment, and modified bagasse biochar is obtained; mixing the modified bagasse charcoal with a sodium alginate solution, performing ultrasonic treatment, heating and stirring to obtain a blended solution; the preparation method comprises the following steps: mixing bagasse and sodium alginate in a mixed solution, dropwise adding the mixed solution into a ferric chloride solution for standing and cross-linking, and carrying out washing treatment, freeze drying and grinding to obtain sodium alginate modified bagasse biochar, the method adopts bagasse as a biochar raw material, and introduces a magnetic material, a nitrogen-containing substance and sodium alginate to modify the biochar function; the surface active sites of the prepared material are increased, the adsorption capacity on tetracycline hydrochloride is improved, and the resource high-value utilization of the red mud and bagasse solid waste is realized.