35 results about "Sodium reduction" patented technology

The invention provides a preparation method of low-sodium hollow salt capable of dietary supplement of astaxanthin, which comprises the following steps: dissolving haematococcus pluvialis protein and food-grade polysaccharide in water, adjusting pH and stirring to obtain a compound solution; adding NaCl and oil into the compound solution, carrying out high-speed dispersion, and carrying out high-pressure homogenization treatment, so as to obtain an oil-in-water Pickering emulsion; the oil-in-water Pickering emulsion is subjected to spray drying, and the low-sodium hollow salt loaded with the astaxanthin is obtained. The low-sodium hollow salt capable of dietary supplement of astaxanthin does not contain any surfactant, and the sodium reduction effect of 30-50% can be achieved; the astaxanthin is encapsulated in the oil phase, so that the problems of poor water solubility, low bioavailability and the like of the astaxanthin are solved, and daily dietary supplement of the astaxanthin is increased; under long-term storage, the low-sodium hollow salt has good astaxanthin retention rate and lipid oxidation stability; the oil oxidation of the fried steak can be effectively prevented, and the food quality can be maintained.

The invention discloses a preparation method of a sodium ferric sulfate composite positive electrode material of a sodium ion battery, which comprises the following steps: S1, precursor solution mixing: mixing and dissolving an iron source, sulfuric acid and a non-metal-based oxidant, and reacting to generate a uniform precursor solution; the precursor solution is subjected to evaporative crystallization, Fe2 (SO4) 3 * xH2O crystals are generated, and x is larger than or equal to 0; s3, performing low-temperature calcination: performing low-temperature calcination on the Fe2 (SO4) 3. XH2O crystal to form a high-crystalline-state anhydrous Fe2 (SO4) 3 crystal; s4, preparing a Na2Fe2 (SO4) 3 / C mixture: uniformly mixing the Fe2 (SO4) 3 crystals, a sodium-containing reducing agent, an organic liquid carbon source and an inorganic solid carbon source, and filtering to obtain the Na2Fe2 (SO4) 3 / C mixture; and S5, performing high-temperature calcination: performing high-temperature calcination on the Na2Fe2 (SO4) 3 / C mixture in a protective atmosphere to form the Na2Fe2 (SO4) 3 / C composite positive electrode material. The preparation method of the sodium ferric sulfate composite positive electrode material of the sodium ion battery has the characteristics of high crystallinity and phase purity, high compaction density and good interface stability.

The invention discloses nano-engineered microalgae for photoimmunotherapy of melanoma and a preparation method of the nano-engineered microalgae. The preparation method comprises the following steps: S1, respectively putting tannic acid, potassium carbonate, sodium citrate and HAuCl4. 3H2O into water to prepare a tannic acid solution with the concentration of 4.3 mg / mL, a potassium carbonate solution with the concentration of 20.7 mg / mL, a sodium citrate reduction solution with the concentration of 0.7 mg / mL and a HAuCl4 solution with the concentration of 10.0 mg / mL; s2, dissolving a tannic acid solution and a potassium carbonate solution in the sodium citrate reduction solution to obtain a mixed solution; s3, the mixed solution is heated under stirring, a HAuCl4 solution is dropwise added, stirring continues, and AuNP is obtained; and S4, mixing the AuNP obtained in the step S3 with the microalgae PCC 7942, standing, incubating, and centrifugally washing, so as to obtain the nano-engineered microalgae PCC-coated AuNP. The functionalized microalgae drug delivery system (PCC-coated AuNP) prepared by the invention has the performance of respectively generating O2 and H2 through photosynthesis and photocatalytic reaction under the irradiation of 635 nm red light.

The present invention discloses a rapid detection method for sodium polydisulfide (PDPS). The method comprises preparing a buffer solution and an Elma color developer; preparing multiple sets of sodium polydisulfide (PDPS) solutions of different concentrations; pretreating the sodium polydisulfide (PDPS) solutions with an excess of a boron hydride compound as a reducing agent to reduce the sodium polydisulfide to a thiol-containing compound; and removing the excess reducing agent. An absorbance test is performed to establish a standard curve for the concentration and absorbance of the brightener, and the concentration of the sodium polydisulfide (PDPS) in the electrolyte to be tested is measured using the established standard curve. The method uses a boron hydride compound as a reducing agent and utilizes ultraviolet-visible spectroscopy to rapidly detect the content of the brightener, sodium polydisulfide (PDPS). The method is convenient and simple to operate, provides highly accurate test data, and is applicable to the detection of electroplating bath additives in various systems.

A sodium purification device for sodium reduction of tantalum powder and its process, relating to the field of metal smelting; comprising a heating furnace, a purification tank, an oil removal device, an air pressure device and a refined sodium storage tank; the purification tank is placed in the heating furnace, and the purification tank is respectively connected to the oil removal device, the air pressure device and the refined sodium storage tank; the purification tank comprises a tank body, a sealing cover, a sodium ingot placement barrel, a primary filtering structure, a secondary filtering tube and a tertiary filtering tube, the top of the tank body is detachably connected to the sealing cover, the sealing cover is provided with a sodium ingot feeding port, the tank body is provided with a sodium ingot placement barrel, and the sodium ingot feeding port corresponds to the position of the sodium ingot placement barrel. The sodium purification device of the present invention is an integrated device for the oil removal process and the sodium oxide removal process, which can remove oil in the purification tank and effectively intercept sodium slag through multiple filtering structures, has simple equipment, short process flow, easy disassembly and cleaning, low safety hazards, and has the characteristics of good purification effect and high efficiency.

The application discloses a kind of Tibetan pig low-salt sausage of compound low-sodium salt and preparation method thereof, it is related to low-sodium salt preparation technical field, including the following raw materials: sodium chloride, modified potassium chloride, stabilizer, modified potassium lactate and composite powder.In the application, modified potassium chloride and modified potassium lactate are mutually synergistic and matched, in the production of Tibetan pig low-salt sausage, modified potassium chloride can replace part of sodium salt to supplement saltiness, completely avoid the bitter taste and metallic off-flavor of ordinary potassium salt, ensure that sausage taste is pure and natural, does not cover up the fresh and fragrant of meat itself;Modified potassium lactate can lock the moisture of meat product, improve the compact texture of sausage, avoid dry meat, and also play a role in mild bacteriostatic preservation, but also avoid the moisture of ingredients to be clumpy, convenient production and deployment.Two-way cooperation, perfect support low-salt formula seasoning demand, improve overall edible palatability, optimize sausage texture quality and storage stability, so that low-salt sausage is healthy in sodium reduction, taste and quality are comprehensively improved.

The invention relates to the technical field of chemical gold plating, in particular to environment-friendly chemical nanogold liquid and application thereof. An environment-friendly chemical nanogold solution comprises the following preparation raw materials including, by mass concentration, 1-3 g / L of sodium gold sulfite, 12-20 g / L of a reducing agent, 48-62 g / L of a composite coordination agent, 25-32 g / L of a pH buffering agent, 20-50 mg / L of a stabilizer, 0.10-0.20 mg / L of a crystal nucleus refiner, 4-7 g / L of a corrosion inhibitor and 0.08-0.12 g / L of a water-soluble ruthenium compound, and the reducing agent is composed of sodium hypophosphite and thiosemicarbazone according to the mass ratio of 5: (2-3). Through synergistic innovation of the components, the environmental protection property, the plating speed, the plating layer quality and the process cost are balanced, the industrial pain points that a traditional chemical gold plating system is high in toxicity, the plating layer is easy to strip, welding is poor and the like are solved, and the industrial application value is remarkable.

The application discloses a kind of implant piezoelectric nano coating and its preparation method and application.The nano coating is composed of nano-flower-shaped barium titanate and gold nanoparticles loaded on its surface.In this application, gold nanoparticles are deposited on nano-barium titanate at high temperature by using the method of sodium citrate reducing tetrachloroauric acid. The nBTO@Au prepared by this method has obvious osteogenesis and antibacterial properties. The application provides a high reactivity, catalytic and non-invasive immediate treatment mode for peri-implantitis, which has wide application potential in implant post-disinfection, peri-implantitis treatment and improving implant survival rate.

The invention discloses a method for preparing 3 beta-hydroxy-androstane-5-ene-17-ketone-D6 (abbreviated as dehydroepiandrostene-D6) from androstane-4-ene-3, 17-diketone-D8 (abbreviated as androstenediketone-D8), and the dehydroepiandrostene-D6 is prepared from the androstenediketone-D8 as a raw material through five steps of enol esterification, upper protection, reduction, deprotection and deuterium hydrogen replacement. According to the preparation method, androstenedione-D8 is taken as a raw material, enol esterification is firstly carried out, then 17-carbonyl is subjected to ethylene glycol protection, 3-carbonyl is reduced through sodium borodeuteride under the condition of a deuterated solvent, deuterium atoms are introduced to the 3-position and the 4-position respectively, then ethylene glycol protection is removed, finally deuterium hydrogen replacement is carried out, the deuterium atom at the 16-position is replaced with a hydrogen atom, and the androstenedione-D8 is obtained. And the dehydroepiandrosterone D6 is prepared and obtained. The method disclosed by the invention is mild in reaction condition and simple to operate, can realize efficient preparation of dehydroepiandrosterone D6, and has an important application prospect.

The application provides a method for preparing low-oxygen titanium powder by controllable sodium reduction, which comprises the following steps: filtering and purifying metal sodium through a molten sodium system to obtain purified sodium; placing molten salt containing TiCl2 in a reactor, vacuumizing and heating, then slowly adding the purified sodium to perform sodium reduction, and obtaining a mixture containing titanium powder after the reaction; crushing the mixture containing titanium powder into fine-grained material with a particle size of no more than 10 mm, washing the molten salt in the fine-grained material with deionized water and dilute hydrochloric acid solution, then washing with water until neutral, vacuum drying, and obtaining fine titanium powder; reducing the oxygen of the fine titanium powder in a hydrogen atmosphere by using magnesium and magnesium chloride, washing with dilute hydrochloric acid solution and deionized water, and finally vacuum drying to obtain low-oxygen titanium powder. 50 The particle size of the prepared low-oxygen titanium powder is 10-50 μm, D 50 is 20-30 μm, and the oxygen content is ≤1000 ppm.

The invention belongs to the technical field of food processing, and particularly relates to a low-sodium composite seasoning salt capable of regulating and controlling salty taste perception and a preparation method and application thereof.The preparation method comprises the following steps that sodium chloride and potassium chloride are co-crystallized to obtain a sodium potassium salt matrix, the sodium potassium salt matrix and a sodium alginate solution are subjected to spray crystallization, and hollow microsphere sodium potassium-sodium alginate is prepared; boiling and granulating the hollow microsphere sodium potassium-sodium alginate and the granulating feed liquid to obtain hollow granulated salt; a pH response material and a high-temperature-resistant wall material are used as double-layer wall materials, an acidulant is used as a core material, and the core material is wrapped by the wall material to obtain the microencapsulated acidulant. And adding a functional additive. The low-sodium composite seasoning salt disclosed by the invention is a precise integration of a multi-component functional system; a sodium potassium salt matrix provides a sodium reduction basis; the microencapsulated acidulant realizes dynamic regulation and control of the salty taste; the natural flavor enhancer optimizes flavor balance, realizes accurate control of the salty taste intensity in time, space and scene, and further promotes functional, personalized and sustainable upgrading of the food industry.

The invention provides a procaterol hydrochloride liquid preparation and a preparation method thereof, and relates to the technical field of medicine preparation. The procaterol hydrochloride liquid preparation provided by the invention comprises 0.001 to 0.05 mg / ml of a main drug procaterol hydrochloride, and auxiliary materials with the following concentrations: 0.0020.001 to 0.02 mg / ml of edetate disodium, 100 to 400 mg / ml of a reducing sweetening agent, and water as a solvent. According to the invention, the disodium edetate and the reducing sweetening agent are combined for use, so that the generation rate of procaterol hydrochloride related substances is synergistically reduced, the quality stability of the product is effectively ensured, meanwhile, the dosage of the disodium edetate and the reducing sweetening agent is also respectively reduced, and the clinical medication safety is further improved.

A method for preparing tantalum powder by reduction of potassium fluorotantalate with sodium, comprising: using metallic sodium as a reducing agent for reduction. Preferably, the temperature of the metallic sodium is above 180°C, more preferably 200-350°C, still more preferably 200-260°C, and most preferably 210-240°C. The present invention also relates to tantalum powder prepared by the method and a use thereof in a capacitor. By increasing the temperature of liquid metallic sodium, the morphology of tantalum powder is improved, and ultimately the specific capacitance and breakdown voltage of the tantalum powder are improved.

The invention discloses an implant piezoelectric nano coating as well as a preparation method and application thereof. The nanometer coating is composed of nanometer flower-shaped barium titanate and gold nanoparticles loaded on the surface of the nanometer flower-shaped barium titanate. According to the invention, gold nanoparticles are deposited on nano barium titanate at a high temperature by using a method of reducing tetrachloroauric acid by using sodium citrate, and nBTOatAu prepared by using the method has obvious osteogenesis and antibacterial properties. The invention provides a high-reactivity, catalytic and non-invasive immediate treatment mode for the peri-implantitis, and has wide application potential in the aspects of post-implant disinfection, peri-implantitis treatment and implant survival rate improvement.

Disclosed is a combined treatment method for laterite nickel ore hydrometallurgical slag and phosphating slag, the combined treatment method includes uniformly mixing a laterite nickel ore hydrometallurgical slag, a phosphating slag, and a sodium alkaline salt to obtain a mixed material; subjecting the mixed material to sodium reduction roasting to obtain a roasted material; leaching the roasted material with water and filtering to obtain a water leaching solution and a water leaching slag; subjecting the water leaching slag to magnetic separation to obtain an iron concentrate. In the disclosure, by mixing a laterite nickel ore hydrometallurgical slag and a phosphating slag and then performing sodium reduction roasting, the iron exists in the form of Fe3O4 and elements such as manganese and zinc exist in the slag in the form of oxides, and during the roasting process, aluminum oxides react with alkali to be converted into sodium aluminate.

The present invention relates to a potassium fluotantalate powder, a method for reducing same with sodium to produce tantalum powder, a tantalum powder obtained thereby, and the use thereof. The potassium fluotantalate powder is used as a raw material during the process of producing the tantalum powder by reducing potassium fluotantalate with sodium. The potassium fluotantalate powder comprises 5-1000 ppm (preferably 50-800 ppm, more preferably 100-850 ppm, more preferably 100-500 ppm, and more preferably 50-150 ppm and / or 300-500 ppm) of a halide salt of an alkaline earth metal, with the balance being potassium fluotantalate. The halide salt of the alkaline earth metal is selected from a halide salt of magnesium and / or a halide salt of calcium, e.g. magnesium chloride. The present invention also relates to a method for reducing the potassium fluotantalate powder with sodium to produce tantalum powder, the tantalum powder obtained thereby, and the use of the tantalum powder in capacitors.

The invention discloses a method for screening odorant substances with sodium reduction potential in edible mushroom Maillard products. The method comprises the following steps: firstly, preparing a coprinus comatus protein peptide Maillard reaction product; the method comprises the following steps: extracting volatile components of the salty and fragrant flavor compounds, respectively carrying out vacuum concentration, preliminarily establishing the association between the flavor and the basic taste by adopting a GC-MS / O-TA combined technology, and screening the potential salty and fragrant flavor compounds. Carrying out gradient dilution on the concentrated solution to obtain diluents with a series of concentrations, analyzing the odor active compounds in the system by adopting a GC-MS / O technology, and recording dilution factors (FD) of the odor active compounds; selecting potential salty and fragrant compounds, and calculating an odor activity value (OAVs); the key salty and fragrant compounds in the system are determined by integrating the FD and OAVs of the potential salty and fragrant compounds, and the salty increasing action mechanism of the salty and fragrant compounds is verified from the molecular level. The problems that in the prior art, the false positive of a screening result is high, key flavor perception characteristics are difficult to capture, and the analysis process is opaque are solved, and a more reliable salty taste enhancing substance screening strategy with a clear mechanism is provided.

The application discloses a combined treatment method for laterite nickel ore smelting slag and phosphating slag, and belongs to the technical field of hydrometallurgy. The combined treatment method comprises the following steps: uniformly mixing the laterite nickel ore smelting slag, the phosphating slag and a sodium alkaline salt to obtain a mixture; performing sodium reduction roasting on the mixture to obtain a roasted material; performing water leaching on the roasted material to obtain a water leaching solution and a water leaching residue through filtration; and performing magnetic separation on the water leaching residue to obtain an iron concentrate. The laterite nickel ore smelting slag and the phosphating slag are mixed and then subjected to sodium reduction roasting, so that iron exists in the form of Fe3O4, manganese and zinc exist in the form of oxides in the slag, and aluminum oxide is converted into sodium aluminate which is easy to dissolve in water by reacting with the alkali in the roasting process, and then the aluminum in the roasted material can be efficiently separated through subsequent water leaching; meanwhile, the reaction of phosphating zinc and phosphating manganese with the alkali also promotes the transformation of iron oxide from non-magnetic to magnetic, and then the iron can be efficiently recovered through subsequent magnetic separation.

The application provides a low-temperature preservation diluent for sperm of Epinephelus lanceolatus and a use method and application thereof. The diluent is prepared from the following raw materials: glucose, calcium chloride, potassium chloride, sodium chloride, sodium bicarbonate, reduced glutathione, sodium dihydrogen phosphate and fetal bovine serum. The diluent contains the following mass of raw materials per liter: 0.4-0.5 g of glucose, 0.03-0.08 g of calcium chloride, 0.15-0.25 g of potassium chloride, 3-4 g of sodium chloride, 1.5-2.0 g of sodium bicarbonate, 1.5-2.5 g of reduced glutathione, 0.008-0.012 g of sodium dihydrogen phosphate, and 8-12% of the fetal bovine serum in terms of the volume percentage of the diluent. The prepared diluent can better maintain the in-vitro activity of sperm, prolong the sperm preservation time, meet the low-temperature preservation requirements of the sperm of Epinephelus lanceolatus, and especially meet the low-temperature preservation requirements of the sperm of Epinephelus lanceolatus.

The present invention provides a method for preparing a low-sodium hollow salt capable of dietary supplementation with astaxanthin, comprising the following steps: dissolving Haematococcus pluvialis protein and food-grade polysaccharide in water, adjusting the pH and stirring to obtain a complex solution; adding NaCl and oil to the complex solution, dispersing at high speed and performing high-pressure homogenization treatment to obtain an oil-in-water Pickering emulsion; spray-drying the oil-in-water Pickering emulsion to obtain a low-sodium hollow salt loaded with astaxanthin. The low-sodium hollow salt capable of dietary supplementation with astaxanthin according to the present invention does not contain any surfactants, and can achieve a sodium reduction effect of 30-50%; astaxanthin is encapsulated in the oil phase, solving problems such as poor water solubility and low bioavailability of astaxanthin, and increasing the daily dietary supplementation of astaxanthin; under long-term storage, the low-sodium hollow salt has good astaxanthin retention rate and lipid oxidation stability; it can effectively prevent the oxidation of the grease in fried steak and is beneficial to maintaining its food quality.

The invention relates to a method for enriching low-content rare earth in neodymium-iron-boron waste acid-soluble slag through low-temperature sodium modification reduction, which comprises the following steps: (1) mixing neodymium-iron-boron waste acid-soluble slag, a carbonaceous reducing agent and a sodium carbonate aid, and carrying out low-temperature sodium modification reduction roasting treatment to obtain a reduction product; and (2) the reduction product is sequentially subjected to mechanical crushing treatment and magnetic separation, and iron ore powder and rare earth enriched slag are obtained. By adding the sodium carbonate additive, the melting point of the system is reduced, the reaction process is accelerated, the solubility of a rare earth element enrichment phase is improved, efficient separation and enrichment of rare earth and iron elements are achieved, and subsequent extraction and utilization of rare earth elements are facilitated.

A process to reduce sodium content in a hydrocarbon stream, the process including contacting the hydrocarbon stream and a diluent to form a mixed stream; contacting the mixed stream and a macroporous cation exchange resin to form a processed stream; and collecting the processed stream, wherein the hydrocarbon stream includes a stream from phenol production and a stream from bisphenol-A production, and greater than 450 parts per million by weight of sodium, based on a total weight of the hydrocarbon stream; the diluent includes a C8-14 hydrocarbon and has a specific gravity of 0.8 to 1.0; the macroporous cation exchange resin has an average particle size of less than 1.5 millimeters, and an adsorption exchange capacity of greater than 2 H+ milliequivalents per milliliter; and the processed stream includes less than 50 parts per million by weight of sodium, based on a total weight of the processed stream.

The present application relates to the technical field of waste salt treatment in waste treatment, and specifically discloses a harmless treatment method for waste salt containing metallic sodium. The method specifically includes the following steps: pretreatment: crushing and grinding the waste salt containing metallic sodium to obtain the ground waste salt; the particle size of the ground waste salt is not more than 50 meshes; static oxidation: placing the ground waste salt in a dry environment for static oxidation; the static oxidation time is 8-16h; the stacking thickness is not more than 2mm, and the waste salt after static oxidation is obtained; the dry environment is: the humidity is less than 30%, and the temperature is 10-30℃. The method provided in the present application is used to safely dispose of hazardous wastes containing metallic sodium waste salts, which are byproducts of the sodium reduction method for preparing tantalum powder, to remove the reactivity of metallic sodium in such hazardous wastes, and to achieve harmless treatment.

The invention discloses a reducing peptide self-assembled fiber-ferrous nano-composite and a preparation method and application thereof.The method comprises the steps that EV-10 fibers and FeCl3. 6H2O are mixed according to the mass ratio of 1: 1, reaction is conducted for 5-8 hours at the temperature of 60-65 DEG C under the condition that the pH value is 1.5-2.0, and the reducing peptide self-assembled fiber-ferrous nano-composite is prepared; and the amino acid sequence of the EV-10 is EQSLVCQCLV. The reducing peptide self-assembled fiber-ferrous nano-composite disclosed by the invention is high in bioavailability, can resist degradation of gastric juice and is degraded in intestinal tracts, so that absorption of the intestinal tracts is improved; no sodium borohydride reducing agent raw material is contained, so that the safety to cells and tissues is good; the compound is good in stability, and the reducing peptide self-assembled fiber can protect reduced iron and is not easy to oxidize; the iron supplement agent has a good iron supplement effect and can be used as a safe and effective iron supplement agent. The process disclosed by the invention meets the requirements of green foods and has a wide industrial popularization prospect.

The invention relates to a treatment device, system and method for sodium reduction and quality improvement of coal, and the treatment device comprises a gas inlet pipeline which is used for conveying gasification waste gas generated by a coal chemical industry unit; the coal washing unit comprises a coal washing container, a coal supply container and a water storage container, the coal washing container is respectively connected with the gas inlet pipeline, the coal supply container and the water storage container, the coal supply container provides coal, the water storage container provides solvent water, and the coal washing container can receive second-metering gasified waste gas entering from the gas inlet pipeline; and the coal washing container can be used for washing coal by utilizing a mixture of gasified waste gas and water. According to the method, the acid mixture generated by carbon dioxide and water is used for cleaning the coal, the gasified waste gas generated by coal gasification is used as a continuous, sufficient and stable carbon dioxide source, and the coal chemical industry waste gas is used for washing the coal, so that the sodium-reducing and quality-improving effects of the coal can be improved, and the coal utilization is cleaner and more efficient; meanwhile, resource utilization of waste gas in the coal chemical industry is achieved, and multi-aspect environmental protection is achieved.

The present invention relates to a method for preparing tantalum powder by reducing potassium heptafluorotantalate with sodium, which is characterized in that pre-heated metallic sodium is used as a reducing agent for reduction. Preferably, the temperature of the metallic sodium exceeds 180 °C, more preferably 200 - 350 °C, more preferably 200 - 260 °C, more preferably 160 - 190 °C and / or 210 - 240 °C. The present invention also relates to the tantalum powder thus produced and its use in capacitors.

The invention relates to the technical field of medical preparations for injection and medicine packaging, and discloses sterile water containing sodium chloride and a preparation method thereof.The sterile water is composed of a basic osmotic pressure adjusting system, a buffer anti-oxidation system and a bacteriostatic system, and the sterile water comprises, by volume, 0.85-0.95% of sodium chloride, 0.35-0.95% of sodium chloride, 0.35-0.95% of sodium chloride and the balance water. 0.01%-0.05% of sodium dihydrogen phosphate; 0.02% to 0.1% of disodium hydrogen phosphate; 0.001%-0.01% of reduced glutathione, 0.001%-0.01% of a surfactant; 0.795% to 0.805% of benzyl alcohol; by optimizing the prescription ratio and adopting a specific process for preparation, the obtained sterile water finished product has excellent physical and chemical stability in long-term storage, and also has good antibacterial performance after unsealing, so that the safety and convenience of clinical use are greatly improved; therefore, the problems that traditional sterile water is insufficient in stability, prone to secondary pollution and complex in repeated administration operation are effectively solved.

Disclosed is a combined treatment method for laterite nickel ore hydrometallurgical slag and phosphating slag, the combined treatment method includes uniformly mixing a laterite nickel ore hydrometallurgical slag, a phosphating slag, and a sodium alkaline salt to obtain a mixed material; subjecting the mixed material to sodium reduction roasting to obtain a roasted material; leaching the roasted material with water and filtering to obtain a water leaching solution and a water leaching slag; subjecting the water leaching slag to magnetic separation to obtain an iron concentrate. In the disclosure, by mixing a laterite nickel ore hydrometallurgical slag and a phosphating slag and then performing sodium reduction roasting, the iron exists in the form of Fe3O4 and elements such as manganese and zinc exist in the slag in the form of oxides, and during the roasting process, aluminum oxides react with alkali to be converted into sodium aluminate.

The present invention relates to a composite antibacterial nanomaterial, a preparation method and an application. The composite antibacterial nanomaterial includes gold nanoparticles, and the surface of the gold nanoparticles is modified with a monomer containing amino and carboxyl groups. The structural formula of the monomer containing amino and carboxyl groups is shown as follows: The present invention also provides a preparation method of the composite antibacterial nanomaterial, which includes preparing gold nanoparticles by using sodium citrate reduction method; mixing the gold nanoparticles with polyacryloyl amino acid to obtain gold nanoparticles modified with polyacryloyl amino acid; under the action of a catalyst, covalently cross-linking ethylenediamine on the gold nanoparticles modified with polyacryloyl amino acid to obtain an intermediate product; under the action of a catalyst, covalently cross-linking azodicarbonamide-hydroxyisobutylamidine hydrate on the intermediate product to obtain the composite antibacterial nanomaterial. The composite antibacterial nanomaterial of the present invention does not rely on oxygen and only releases free radicals at the site of bacterial infection, thus effectively avoiding damage to normal tissues.