1477results about How to "Fast separation" patented technology

The invention discloses a super-hydrophilic and underwater super-oleophobic oil-water separation mesh membrane, and its preparation method. The method comprises the following steps: 1, cleaning a copper mesh, and airing; 2, dissolving an alkaline medium and an oxidant in water, and uniformly stirring to obtain a mixed solution; and 3, dipping the aired copper mesh in the mixed solution, and carrying out an oxidation reaction to obtain the oil-water separation mesh membrane. The oil-water separation mesh membrane has the advantages of easily available raw material, low cost, simple equipment and making technology, realization of large-scale preparation, large water flux, fast water-water separation speed, good oil-water separation effect, suitableness for the treatment of sewage containing a large amount of water, very good separation effect on n-hexane, petroleum ether, dichloroethane, benzene, gasoline, diesel oil, kerosene, machine oil, crude oil, animal and plant oil, and the like, easy cleaning, repeatable use, and good stability.

The invention discloses an extraction and separation method of cannabidiol. According to the method disclosed by the invention, the water solubility of the cannabidiol is enhanced through adopting analkaline solution and the cannabidiol is extracted and enriched by utilizing an organic solvent; then the cannabidiol is purified and enriched through a polyamide resin column, neutral aluminum oxideand a bonded silica gel column; then the cannabidiol is crystallized to obtain high-purity cannabidiol. The method disclosed by the invention is easy to operate, strong in practicability and suitablefor industrial popularization and application.

The invention discloses an amino complex compound and a preparation method and application thereof. The components of the amino complex compound are MX (NH3)n, wherein, M is one or a plurality of Li, Mg, Al, Ca, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sr, Ba, Sn; X is one or a plurality of F, Cl, Br, NO3, SO4; m is determined according to chemical valence, which is less than or equal to 5 and more than or equal to 1; n is determined according to coordination number, which is less than or equal to 15 and more than or equal to 1. The amino complex compound is used as an absorbent of amino after deamination and realizes separation, purification, storage and transporting of ammonia gas through low-temperature ammonia absorption and high-temperature ammonia discharge. The ammonia in circulating gas used in a synthetic ammonia technique of the invention has fast separation speed and the ammonia content entering into a tower can be reduced below 0.1 percent, thus remarkably promoting the ammonia net value and improving the transformation efficiency of the synthetic ammonia technique; furthermore, the invention can be suitable for different ammonia synthesis systems, in particular to a low-pressure ammonia synthesis system and realize the solidification of the ammonia gas during storage and transporting processes; the ammonia storage quantity can reach 40 to 70wt percent with safety and high efficiency.

The invention relates to the technical field of separation membranes and discloses a preparation method of a polymer porous membrane for removing water pollutants. The preparation method comprises the following steps of blending cyclodextrin and a membrane preparation material, and adding a cross-linking agent into the mixture to fix the cyclodextrin to the membrane material so that repeated use is avoided, cyclodextrin is lost from the polymer porous membrane, a selective separation function of the polymer porous membrane is lost and polymer porous membrane hydrophility is changed. The polymer porous membrane has a substantial capability of adsorption and removal of organic pollutants such as phenols and aromatic amines (aromatic substances) in water, has good heavy metal ion removal effects, has high separation efficiency and low pressure drop, is convenient for regeneration, can be massively produced and used easily, and can be widely used in an ecological protection water purification treatment system and a water treatment system.

Disclosed are a substrate and base plate separation process for a flexible display device and the flexible display device and a production process thereof. The substrate and base plate separation process comprises the following steps of step 1, producing a sacrificial layer on a base plate, wherein the sacrificial layer is a carbon elementary substance film; step 2, producing a flexible film substrate on the sacrificial layer; step 3, producing an electronic element on the flexible film substrate; step 4, dissociating the flexible film substrate from the base plate to obtain the flexible display device. The sacrificial layer is the carbon elementary substance film, particularly any one or more than one of an amorphous carbon film, a carbon nanotube film, a graphene thin film, a fullerene thin film or a diamond film. The thickness of the sacrificial layer is 1 to 100 nm. According to the substrate and base plate separation process, the sacrificial layer and the flexible display device and the production process thereof, the carbon elementary substance film serves as the sacrificial layer and accordingly the separation of the substrate and the base plate can be simple, low in cost and rapid and the device performance cannot be affected.

The invention mainly discloses a middle-set type high density sediment water purification tank and a purification technology thereof. The middle-set type high density sediment water purification tank comprises a reaction region, a clarification region and a sludge transfer tank. The reaction region comprises a mixing tank and a flocculation tank; the clarification region comprises a pre-sedimentation region, a sludge concentration region, an inclined pipe sedimentation region and a clear water canal, wherein the sludge concentration region is arranged at the bottom of the clarification region, the inclined pipe sedimentation region is arranged above the clarification region, and the clear water canal is connected with a water outlet pipe through a finger type water collecting tank positioned above the inclined pipe sedimentation region. A plurality of conical sludge collecting pits are arranged at one side of the bottom surface of the clarification region, and a sludge scraper is arranged on the bottom surface of the clarification region; a gas stripping device which lifts sludge in the sludge collecting pit to a sludge discharging groove at the upper part of the clarification region is arranged in each sludge collecting pit; the gas stripping sludge discharging groove is connected to the sludge transfer tank; the sludge transfer tank is connected with a water inlet pipe through a reflux pump; and simultaneously, the sludge transfer tank is connected with a sludge pump. The middle-set type high density sediment water purification tank has the advantages of having simple tank shape, compact structure and water outlet quality, being beneficial to the control on a sedimentation tank and the concentration and number of returned sludge, ensuring the stability of operation conditions and being low in operating cost.

The invention discloses an oil-water separation mesh film with an acid-base salt stabilizing function and with an underwater super-oleophobic property and a preparation method thereof. The method for preparing the oil-water separation mesh film comprises the following steps: 1) cleaning a 100-400-mesh fabric mesh, and drying; 2) impregnating the dried fabric mesh in an acidic solution of a chitosan-based polymer; 3) impregnating the fabric mesh in a base solution, so as to enable the chitosan-based polymer to be cured, drying the cured chitosan-based polymer, and cross-linking the dried cured chitosan-based polymer in a dialdehyde cross-linking agent solution, so as to obtain a cross-linked coating fabric mesh; and 4) impregnating the cross-linked fabric mesh in a base solution of a reducing agent for reducing Schiff base formed by cross-linking, washing the reduced fabric mesh by using deionized water, and drying to obtain the oil-water separation mesh film. The oil-water separation mesh film has biological affinity, is environment-friendly and easy to clean, can be repeatedly utilized and has high stability in strict acid-base salt environments.

The invention discloses a method for extracting high-purity fucoxanthin from seaweeds. The method is characterized by comprising the following steps: cleaning the seaweeds by using the distilled water so as to remove saline ions on the surfaces of the seaweeds, and then removing moisture on the surfaces of the seaweeds; then adding an organic reagent to the seaweeds, digesting in the dark for 8-24 hours, and carrying out suction filtration so as to obtain a leaching liquid; repeatedly digesting the leaching liquid till the leaching liquid is colorless, and combining each leaching liquid into a brown bottle; finally carrying out rotary evaporation for a period of time till black green precipitates occur in a liquid, and filtering so as to remove pigment and impurities; and continuously carrying out rotary evaporation till red solids are separated out in the liquid, and filtering so as to obtain the red solids which are the high-purity fucoxanthin. The method has the advantages that the safely healthy high-purity fucoxanthin raw material is obtained for the first time under the condition that no chromatographic techniques are used for separation, and the preparation process is safe, harmfulless, economic and environment-friendly.

The invention relates to a centrifugal microfluidic serum separation chip and a preparation method thereof. The centrifugal microfluidic serum separation chip is a wafer-shaped microfluidic chip with a micro-structure and a micro-channel, and consists of a chip engraved with a micro-structure and a micro-channel and a blank chip. The centrifugal microfluidic serum separation chip is fixed on a rotation platform of a centrifugal machine, the separation operation of serum and erythrocyte in a micro-upgraded blood sample can be realized by the synergetic process of the micro-structure and the micro-channel on the chip, and the serum for analysis and detection can be acquired. The centrifugal microfluidic serum separation chip is applicable in related application fields, such as biomedicine, clinical diagnosis, health quarantine and the like.

The invention relates to an electrostatic coalescer with high efficiency, which is a piece of compact equipment for the electrostatic dehydration of crude oil emulsion with high efficiency, and is applied for the crude oil dehydration in the production process of oil fields. The invention is characterized in that: the invention comprises a housing, which comprises a coalescence part arranged vertically and a sedimentation and separation part arranged horizontally; the coalescence part is a vertical cylinder shaped structure with a cylinder shaped electrode assembly arranged inside; the sedimentation and separation part is a horizontal tank structure arranged below a dehydrator, with an emulsion distribution device, a spoiler and a staggered corrugated coalescing plate arranged inside. A high voltage transformer is arranged on the sedimentation and separation part and is connected with the cylinder shaped electrodes by a high voltage insulated cable. The cylinder shaped electrodes are covered by a compact insulation layer which can reduce leakage current and prevent the short circuit among the electrodes. The distance among the cylinder shaped electrodes is small, so a narrow runner is formed, and high strength electric field is formed in the narrow runner. The invention has the advantages that: the crude oil emulsion successively experiences the effects of electrostatic coalescence, staggered corrugated coalescing plate coalescence and the eddy current coalescence of the spoiler; the contained water drops grow bigger; the settling velocity is accelerated, and the rapid separation between crude oil and water is realized.

The invention relates to a preparation method of human plasma protein, in particular a method for producing intravenous injection human immune globulin by using filter press technique for separation in combination with chromatograph for purification. The method is characterized in that a filter press is adopted as a main separation device to replace a centrifugal machine for producing intravenous injection human immune globulin, so that the temperature and other conditions for separation are easy to control, the separation speed is quick, and the safety is high without a high-speed operating device. Meanwhile, ion-exchange column chromatography is adopted to further purify the product and acquire the intravenous injection human immune globulin with the purity as high as 98.5-100%. The sum of monomer and dipolymer reaches 99-99.5%. PKA (proteinkinase A) is no more than 3IU / ml and ACA (Anti Cardiolipin Antibodies) is no more than 9%. Besides, the process is high in recovery rate, and for each ton of blood plasma, 5600-6300g of intravenous injection human immune globulin can be harvested.

The invention discloses a making method of high-purity tanshinone, which comprises the following steps: (1) heating and refluxing to extract salvia miltiorrhizae root and stalk through 0.1-6.0mol / L acid water / alcohol solution; (2) adsorbing extract through adsorbing column with large-hole resin adsorbent; (3) eluting through water until pH value is 7 first and hydrophilic solvent then; collecting 3-5 column bulks to elute tanshinone completely; (4) evaporating; adding organic solvent; heating; dissolving; crystallizing; or adopting polyamide, gluglucosan gel Sephadex LH-20, MCI GEL CHP20P, C4, C8 or C18 bond phase; obtaining the product.

The invention discloses a preparation method of an oil-water separation mesh film with super-hydrophilicity and super-lipophobicity. The method comprises the steps that a metal net with the mesh size being 400-2,000 is adopted as a substrate, a cold spraying method is adopted, net wires of the metal net are coated with hydrophilic materials in a spraying mode, the hydrophilic materials are one or more of zinc oxide, silicon dioxide, calcium carbonate and titanium dioxide, and the grain size range is 5-200 nanometers; finally sintering is performed under the temperature of 300-750 DEG C for 60-240 min, and the oil-water separation mesh film with super-hydrophilicity and super-lipophobicity is obtained. The metal net does not need to be modified, the binding force is improved with no adhesive, no secondary pollution is generated, cleaning is easy, and the mesh film can be repeatedly used.

The invention discloses a multiple-magnetron type large-capacity microwave-assisted extraction machine and a microwave-assisted extraction method thereof, belonging to the field of biological raw material extraction equipment and an extraction method. The multiple-magnetron type large-capacity microwave-assisted extraction machine comprises a rack, a transmission device, a microwave tank, a microwave device, an air-entrapping device, a rotor device, a discharging device and a control device, wherein a plurality of magnetron installing holes uniformly and equidistantly distributed are formed in the wall of the microwave tank; the microwave device comprises a plurality of high-frequency magnetrons which are uniformly and equidistantly arranged on the wall of the microwave tank, and the high-frequency magnetrons are connected with an external power source; the air-entrapping device comprises a plurality of compressed air inlets formed in the wall of the microwave tank, a compressed air input pipeline and a plurality of electromagnetic valves; the rotor device comprises a rotating shaft and a plurality of stirring wings which are fixed on the rotating shaft and form certain crossing angles with the rotating shaft. The multiple-magnetron type large-capacity microwave-assisted extraction machine has the advantages that feed liquid in the microwave tank continuously runs and interchanges, an extractive is uniformly subjected to the action of an electromagnetic field to be heated, the extraction rate is increased, and the extraction time is shortened.

The invention provides a composite superfine fibre membrane material of a biologic compatible shell core structure and a preparation method thereof. The composite superfine fibre of the biologic compatible shell core structure, which comprises 20-95% of shell layer biomacromolecule by mass percent and 5-80% of core layer colloid by mass percent, is mainly prepared by utilizing an electrostatic spinning method with simple and easy operation. The composite superfine fibre membrane material of the biologic compatible shell core structure has light and flexible quality, good air permeability and favorable biologic compatibility, biologic degradability and biologic absorptivity, can be used as an active medicine carrier material, can completely package various active medicines, realize the independent controlled release of various medicines and has extensive application prospect in the aspects of tissue engineering bracket materials, wound coating materials, artificial dressings, multi-functional composite membranes and the like.

The invention belongs to the technical field of electric power tools, in particular to a waste power cable recycling device convenient for peeling. For the problem that a cable is inconvenient for being clamped and fixed when the existing cable recycling device is used, and the splicing knife is easy to slip, the following solution is proposed that the waste power cable recycling device comprisesa base, wherein the top and bottom of the outer wall at one side of the base are respectively provided with a driven shaft mounting hole and a driving shaft mounting hole, the inner wall of the drivenshaft mounting hole and the inner wall of the driving shaft mounting hole are respectively connected with a driven shaft and a driving shaft through the bearings, and a push rod screw on the outer wall at one side of the base is fixed with a recovery motor. The device facilitates quick replacement of the pay-off roller, helps to improve the separation speed of the wire and the jacket, helps to improve the working efficiency, can effectively improve the phenomenon that the cable roller is loosened by the rotation of the pay-off roller, can clamp and fix cables of different sizes, and helps toreduce the probability that the cutting is not complete as the splicing knife slides, resulting in rework.

The invention relates to a rapid clutching device for wire straightening shearing machines, which comprises a fixed saw-shaped gear, a movable saw-shaped gear, a hanger which has a shape like the part of the hand between the thumb and the index finger, a returning device, an angle-iron cover plate, a movable shaft, a spring, a baffle, a sleeve shaft, a pulling connecting piece, an electromagnet frame, a fixed shaft, wherein the fixed saw-shaped gear is fixedly connected with the fixed shaft; the movable saw-shaped gear is fixedly connected with the movable shaft; the movable shaft is arranged in the sleeve shaft and is movably connected with the sleeve shaft; and the fixed saw-shaped gear movably meshes with the movable saw-shaped gear. The device has the advantages of high separation speed, small recoil force, stable positioning and locking and especially long life span, and can not be subjected to clutching failure caused by that too strong impact inertia force causes the returning device to skid and be unhooked.

The invention belongs to the field of extraction equipment for pretreatment of samples, and discloses automatic solid phase extraction equipment. The automatic solid phase extraction equipment comprises a stand, a sample injection device, a sample turntable, an extraction column turntable, a liquid feeding device, a pressure device, an extraction liquid turntable and a control device, wherein the sample turntable, the extraction column turntable and the extraction liquid turntable are successively mounted on the stand from high to low in a horizontal rotation manner; multiple extraction column support holes are formed in the circumference of the outer edge of the extraction column turntable; multiple sample support holes and one liquid injection through holes are formed in the circumference of the outer edge of the sample turntable; multiple extraction liquid pipe support holes are formed in the circumference of the outer edge of the extraction liquid turntable; the sample injection device is used for extracting samples from a sample tube and injecting samples into the solid phase extraction column through a liquid injection through hole; the pressure device is used for feeding solvent into the solid phase extraction column; the control device is used for controlling operation of the whole extraction equipment. By adopting the equipment, the difficulty of labor operation can be lowered, and the testing effect can be improved.

The invention discloses an oil-water separation screen membrane with lead ion responsiveness and a preparation method of the membrane. The oil-water separation screen membrane comprises the following steps: (1) mixing 3-Hydroxytyramine hydrochloride and a buffering solution with the pH valve being 8.0-12.0 to obtain a mixed solution; (2) soaking the screen membrane with the mixed solution; and (3) dissolving a mercaptan compound and an alkaline medium in water to obtain turbid liquid, and soaking the screen membrane taken in the step (2) with the turbid liquid, thus obtaining the oil-water separation screen membrane with super hydrophilicity / hydrophobicity and lead ion responsiveness. The oil-water separation screen membrane disclosed by the invention can be used for treating sewage containing oil and lead ions. Because of lead ion responsiveness, the oil-water separation screen membrane can realize high oil-water separation efficiency and speed, and can also be used for monitoring lead ions, thus enhancing the performance of a separation device, and simplifying a sewage treating device; the screen membrane is non-toxic and harmless, environmentally friendly, high in stability, and can be used for wide-range preparation.

The invention relates to a preparation method of an oil-water separation omentum with underwater ultra oleophobicity. The method comprises the steps that by using a woven fiber net of 400-2000 mesh as the substrate, and combining the inorganic nano particles with hydrogel, the surface roughness of the hydrogel is improved to enhance the surface hydrophilicity of the omentum; by using the method of photo polymerization, the meshes of the woven fiber net are coated with a hydrogel coating layer which has a nanocomposite structure and is formed with cross-linked polymer and inorganic nanoparticles, and then the oil-water separation omentum with underwater ultra oleophobicity is obtained. The oil-water separation omentum prepared by the method has the advantages of a large water flux, a fast speed of oil-water separation, and no need to modify the woven fiber net.

The invention relates to a mechanical automatic speed changer clutch actuating mechanism. The mechanism comprises a clutch driving device and a clutch master cylinder assembly, wherein the clutch driving device comprises a clutch electric motor (8), a clutch electric motor worm (9), a clutch electric motor worm wheel (10) and a clutch gear (15) engaged with the clutch electric motor worm wheel (10); and the clutch master cylinder assembly comprises a master cylinder piston (12). The mechanical automatic speed changer clutch actuating mechanism is characterized in that the inside of a clutch casing (7) is provided with a clutch rack assembly; and the clutch driving device is connected with the clutch master cylinder assembly through the clutch rack assembly. Due to the adoption of the technical proposal, the mechanical automatic speed changer clutch actuating mechanism has the advantages of simple structure and smooth transmission.

The invention discloses a net membrane with oily sewage purification capability and a preparation method and application thereof. The oily sewage purification net membrane is an A / B double-layer composite net membrane, wherein the A layer of net membrane is formed by depositing a TiO2 coating on the net wire surface of a fabric net; and the B layer of net membrane is arranged on the surface of the A layer of net membrane and provided with a photodegradable hydrophobic modifier layer. The oily sewage purification net membrane can be used for simultaneously implementing oil-water separation of oily sewage and degradation of soluble pollutants. The net membrane has super-hydrophobic and super-oleophyllic properties in air, the contact angle between the net membrane and water in the air is more than 150 degrees, and the net membrane has good photo-catalytic property under ultraviolet. The net membrane can be applied to purification, chemical separation, environmental protection and the like of the oily sewage. The net membrane for sewage purification has the advantages of good separation effect, high purification efficiency, low cost, low energy consumption, convenience and the like.

The invention discloses a biochemical sewage separation, stirring, filtration and purification treatment system. The system comprises a support frame, wherein the top of the support frame is providedwith a coagulation device. Through a flocculant injection device, a flocculant can be automatically injected into sewage without manual operation of workers, so that the workload of the workers is reduced; meanwhile, the flocculant injection device can control the injection amount of the flocculant according to the purification degree of the sewage, so that it is ensured that the injection amountof the flocculant is matched with the amount of the sewage, the situation of excessive or insufficient flocculant addition is avoided, the consumption of the flocculant is reduced, and the sewage treatment effect is improved. Through a water discharging device, the sewage which reaches the standard can be discharged immediately, and therefore the defect of manually controlling the coagulation timeis effectively avoided, so that the sewage treatment effect and the sewage treatment efficiency are improved. Through a sludge-sewage separation device, the work of separating sewage from sludge andthe coagulation process are synchronously carried out, so that the sewage treatment time is shortened, and the sewage treatment efficiency is improved.

The invention relates to a solid phase enzyme mold-spores segregator, which comprises a feed hopper with feed inlet and feed outlet, a motor, a stirring machine, a centrifugal blower with adjusting valve, a speed pipe, an inertia separator and a cyclone separator. It is characterized in that it arranges the screen cloth on the top part of the inertia separator and the conical disk on the bottom, it is connected with the feed inlet by the return pipe; the top of the inertia separator is connected with the cyclone separator by pipe; the gas outlet of the cyclone separator is connected with the gas cleaning unit by pipe.

The invention discloses a preparation method of a molecular engram composite film for separating a tryptophane isomer, which comprises the following steps: by using a polyvinylidene fluoride / polyvinyl alcohol blended film as the base film, coating chitosan used as a functional polymer molecular engram coating liquid on the surface of the base film in a crosslinking manner; and after the solvent is volatilized to dryness, eluting to remove template molecules, thus obtaining the molecular engram composite film capable of performing specific recognition on the template molecules. The composite film prepared by the method can continuously and fast realize the separation of a tryptophane isomer, has the advantages of simple separation operation, high efficiency and energy saving, and can be easily industrialized.

The present invention discloses an oil-in-water type emulsion demulsifying agent and a preparation method thereof. Firstly, bisamide is prepared, then chlorinated polyether is prepared, and finally cationic polyether is obtained, namely the oil-in-water emulsion demulsifying agent. The preparation method has readily available raw materials, is simple in operation, and has low equipment requirements. The prepared demulsifying agent is a cationic polymer with a network structure formed by the reaction of bisamide and epichlorohydrin, has a special network structure and a very strong surface activity, has a good demulsification function, is a reverse demulsifying agent suitable for chemical flooding produced liquid, can be used in oilfield produced wastewater treatment, can break the emulsion interfacial energy, and has an oil removal rate of more than 98% in a use amount of 20-30 mg / L. The prepared demulsifying agent is not layered, has no caking and no mechanical impurities, and has characteristics of being fast in oil and water separating speed and being low in oil content of water, and a good demulsifying effect for a three compound combination flooding O / W emulsion and high oil removal efficiency.

The invention relates to a dense oil sewage treatment reverse-phase demulsifying agent, wherein the invention is characterized in that: it uses methyl glycol as initial agent, via catalyst, to process oxypropylation reaction, and process aggregation with epoxyethane, to generate methyl glycol polyether; uses nonyl phenol as initial agent, via catalyst, to react with epoxyethane to generate nonyl phenol ethoxy compound, then to be aggregated with epoxypropane, to generate alkyl phenol polyvinyl ether; then mixing two products, to process esterification with acroleic acid under acid condition, via initiator to process free group aggregation, to generate esterified product, then uses maleic acid to seal end, to generate acroleic acid modified macromolecule demulsifying agent. The invention has simple process, warm reaction, and high efficiency.

The invention provides a method for quickly detecting lead in liquid biological samples based on magnetic separation and quantum dots (QDs) marks. The method comprises the steps of (1), preparing a lead-resisting monoclonal antibody; (2), coupling the lead-resisting monoclonal antibody with nano magnetic beads through covalent bonds to prepare lead-resisting immune nano magnetic beads; and (3), adding bifunctional chelating agents, BSA (Bovine Serum Albumin) and triethylamine (TEA) into the liquid biological samples, performing incubation and adding the lead-resisting immune nano magnetic beads to mix fully, then performing magnetic separation, adding biotinylation BSA antibodies and streptavidin quantum dots (QDs) into sediments obtained by magnetic separation, and performing fluorescence detection by using a fluorescence microplate. The invention also provides a kit for quickly detecting lead in liquid biological samples.

The invention provides a preparation method of a magnetic nanometer iron oxide adsorbent for removing arsenic from water and belongs to the technical field of synthesis of a magnetic nanometer adsorbing material for water pollution control. The preparation method comprises the following steps of: step one, mixing a ferric salt aqueous solution and an alkaline aqueous solution to prepare ferric hydroxide, centrifugally separating ferric hydroxide, adding glacial acetic acid, and stirring till forming a hydration ferric oxide colloidal solution; and step two, adding an organic solvent to the colloidal solution, so that hydration ferric oxide reacts with the organic solvent to form a compound precipitate, separating, drying and baking to obtain the magnetic nanometer iron oxide adsorbent. The prepared magnetic nanometer iron oxide adsorbent is not required to be compounded with other materials; the preparation method is simple; the cost of raw materials is low; and the magnetic nanometer iron oxide adsorbent has a good absorption effect on arsenic in water and can be used for purifying water.