54results about How to "Good magnetic separation performance" patented technology

The invention discloses carbon-coated ferroferric oxide core-shell nano particles and a preparation method thereof and belongs to the technical field of preparation of nano material. Deionized water is employed as a solvent; ammonia water is employed as a co-precipitation agent; and a soluble ferric salt and a soluble monosaccharide, or soluble polysaccharide, are employed as raw materials. The deionized water, the ammonia water, the soluble ferric salt and the soluble monosaccharide, or the soluble polysaccharide, are mixed together to form a homogeneous suspension liquid. The homogeneous suspension liquid, which is a mixture system, is transferred into a polytetrafluoroethylene inner liner having a stainless steel substrate. The mixture system is subjected to a reaction in a drying oven at 120-220 DEG C for 5-15 hours after the inner liner being sealed to obtain the carbon-coated ferroferric oxide core-shell particles. Particle sizes of the nano particles are 5-7 nm. The preparation method is easy, is low in cost and is free of environmental pollution. The nano particles prepared through the method have a good effect of adsorbing an organic dye and can be used in the technical fields of biological technology, medicine and anode materials of lithium ion batteries, and especially in the technical field of sewage treatment.

The invention discloses a full-automatic chemiluminiscence tester and belongs to the field of chemiluminiscence testing.The full-automatic chemiluminiscence tester comprises a mechanical arm module, a refrigeration module, a power module, a reagent sample disk, a sampling needle component, a stirring component, a reaction cup frame, an incubation device, a magnetic separation component, a washing station component and a measuring room.Full-automatic management is achieved for mixing, reacting, incubating, magnetic separating, detecting and other procedures of a sample to be tested, the detection efficiency is improved, and operation errors are reduced.

The present invention relates to a composite photocatalyst which can utilize sunlight and has good magnetic separating property and its preparation method. Said preparation method includes the following several steps: firstly, utilizing hydrothermal method to synthesize NiFeO4 nano granules, then utilizing homogeneous precipitation method to directly cover NiFeO4 magnetic nuclear surface by using TiO2 so as to form TiO2 external shell. Said composite photocatalyst can be used for making water supply treatment and waste water treatment.

A magnetic separation unit can prevent any magnetic flocs deposited on an inner wall of a water passing pipe from closing a water channel for stabilizing a magnetic separation performance and reduce cost by a small-diameter portion of the water passing pipe. The magnetic separation unit has an air-core solenoid type magnet provided around the water passing pipe guiding, from a lower side, treated water including magnetic flocs in which contaminants and magnetic particles are flocculated, a rotating disc type magnetic filter case provided above the air-core solenoid type magnet for attracting the magnetic flocs in the treated water supplied from the water passing pipe and flushing means for flushing the matrixes to which the magnetic flocs are attracted. The water passing pipe has a small-diameter pipe positioned in the air-core solenoid type magnet, and an enlarged pipe enlarged from the small-diameter pipe toward a water passing part of the rotating disc type magnetic filter case.

The invention discloses application of activating mono-persulfate based on copper ferrite nano-powder. Nanometer copper ferrite particles are put into a solution containing persistent organic pollutants, then, mono-persulfate is put to perform a reaction, after the reaction is ended, and a magnetic separation method is performed for recycling an activating agent. Compared with other activating systems, such as metal ions (Fe2+ / Cu2+) or nanometer copper oxide, the adopted nanometer copper ferrite is higher in activating efficiency, the mono-persulfate can be efficiently and continuously activated for generating sulfate radials and hydroxyl radicals, and the purpose of degrading the persistent organic pollutants is achieved.

The invention provides visible-light responding type magnetic compound photocatalyst carbon microspheres-zinc ferrite and silver phosphate (CMSs-ZnFe2O4 and Ag3PO4) with core-shell structures and a preparation method and application of the visible-light responding type magnetic compound photocatalyst carbon microspheres. The CMSs are used as cores, zinc ferrite and silver phosphate are sequentially loaded on the surface of the CMS by a solvothermal method and an in-situ precipitation method, therefore, the compound photocatalyst carbon microspheres-zinc ferrite and silver phosphate with the double core-shell structures is prepared. Compared with pure Ag3PO4, the prepared compound photocatalyst has the advantages of high visible light absorption strength, good magnetic separation property, strong photo corrosion resistance and the like, is applied to treatment of 2,4-dichlorophen non-biodegradable organic wastewater, has high removal rate of 96.56% for 20mg / L of 2,4-dichlorophen solution within 150min, and still has the removal rate up to 86.21% for the 2,4-dichlorophen solution after used repeatedly for four times.

The invention relates to a palladium-based dopamine-coated magnetic carbon nano-tube catalyst and application thereof. A preparation method comprises the following steps: (1) oxidizing carbon nano-tubes to obtain carboxylic carbon nano-tubes; (2) dissolving a nickel salt in a mixed solution of ethyl alcohol and water, adding the carboxylic carbon nano-tubes, performing ultrasonic treatment, drying and roasting to obtain nickel-filled carboxylic carbon nano-tubes; (3) dispersing the nickel-filled carboxylic carbon nano-tubes in Tris buffering liquid, adding dopamine, stirring, and performing centrifugal drying to obtain poly-dopamine-coated magnetic carbon nano-tubes; and (4) dispersing the poly-dopamine-coated magnetic carbon nano-tubes in an aqueous solution of a palladium salt, performing ultrasonic treatment, heating, stirring, evaporating, drying, and reducing to obtain the palladium-based dopamine-coated magnetic carbon nano-tube catalyst. The palladium-based dopamine-coated magnetic carbon nano-tube catalyst has excellent magnetic separating performance and can be effectively separated from a liquid phase after the completion of a reaction; and the recycling rate of the catalyst is effectively improved.

The invention discloses a method for removing contaminated-soil heavy mental with magnetic-modified biochar. The method includes the specific steps that the prepared magnetic-modified biochar serves as a soil remediation agent, water serves as a dispersion medium, heavy metal contaminated soil and the magnetic-modified biochar are mixed and make contact with each other, the steps such as high pressure washing sieving, continuous strong mixing, magnetic separating and solid-liquid separating are carried out, and standard soil for agricultural production and construction is obtained. According to the method, the magnetic-modified biochar is applied to heavy metal contaminated soil remediation, the treatment process of leaching waste liquid is fundamentally eliminated, engineering construction and cost are reduced, heavy metal contaminants in soil are thoroughly removed, and the environmental risk is eliminated. Meanwhile, a large amount agricultural waste can be consumed through resourceutilization of the biochar, and contamination caused by waste incineration and landfill and land occupancy are reduced.

The invention provides a preparation method for a magnetic ZnO@ZnFe2O4 compound optical catalyst. The preparation method comprises the following steps: S1, preparing ZnFe2O4; S2, weighing and dissolving ZnFe2O4 in the step S1 in anhydrous ethanol and then adding zinc acetate and stirring the mixture in a water bath at 80 DEG C to boil to obtain a solution A; S3: weighing LiOH.H2O added to anhydrous alcohol solution, sonication mixed evenly, the resulting solution b;S3, weighing and adding LiOh.H2O into the anhydrous ethanol solution, and carrying out ultrasonic treatment and uniformly mixing to obtain a solution B; and S4, dropwise adding the solution B in the S3 into the solution A in the S2, continuously stirring the mixture to react for 4-6 hours at 80 DEG C after dropwise addition, and then carrying out magnetic separation, washing by deionized water and anhydrous ethanol and vacuum drying to obtain the magnetic ZnO@ZnFe2O4 compound optical catalyst. The preparation method does not cause resource waste and formation of additional pollution, and is simple to operate and relatively low in cost, so that the preparation method is a green and environmental-friendly efficient treatment technology. The prepared compound optical catalyst has the characteristics of being high in chemical stability, good in degradation efficiency, good in magnetic separation effect and the like.

The invention discloses an incubation and magnetic separation device applied to chemiluminescence determination and belongs to the field of chemical luminescence determination. The incubation and magnetic separation device applied to the chemiluminescence determination comprises an incubation device and a magnetic separation device, wherein the magnetic separation device is arranged at one side of the incubation device, so that a magnet on a magnet frame corresponds to a bottom side face of a reaction cup on a reaction cup hole. The incubation magnetic separation device integrates an incubation function and a magnetic separation function; a temperature range and magnetic selection time are accurate and adjustable; the device is stable in properties and simple to operate. The incubation device adopts contact type direct heating and has a good incubation effect; the magnetic separation device has the advantages of good buffering effect and reduction of loss of magnetic beads and the like.

The invention provides a surface spouting photocatalytic material enrichment method based on magnetic attraction. The method comprises the following steps: (1) preparing a hydrophilic magnetic composite nanometer photocatalyst with high-efficiency photocatalytic degradation performance; (2) preparing building surface spouting liquid containing the magnetic composite nanometer photocatalyst; (3) performing building surface pretreatment; (4) building surface slurry spraying; (5) performing magnetic attraction enrichment on a photocatalytic material in the surface spraying slurry; (6) spouting liquid curing. The hydrophilic magnetic composite nanometer photocatalyst is enriched on the coating surface under the effect of magnetic attraction of an applied magnetic field, a photocatalytic surface with high density, high abundance and high exposure area is formed, the material has strong adsorption and photocatalytic degradation performance on toxic pollutants, and environmental pollutants are efficiently removed at low consumption.

The invention relates to a method for modifying magnetic bentonite by a biosurfactant. The method comprises the steps of firstly burying straws and rice husks in farmland soil for composting, performing enrichment culture on compost and domesticating a biosurfactant to generate a bacterial strain, continuously performing fermental cultivation, re-suspending fermentation liquor by using dichloromethane, filtering, extracting, centrifuging, and collecting sediment, thus obtaining a purified biosurfactant. The purified biosurfactant is used for replacing a conventional chemical surfactant, modifying the magnetic bentonite, and preparing to obtain a novel adsorber; the novel adsorber is applied to removal of uranium in low-concentration uranium-containing wastewater. The adsorber has good adsorptive property, needs main raw materials of agricultural waste biomass and natural minerals, is pollution-free to environment, and truly realizes resource conservation and environment friendliness. The method is simple, mild in reaction condition, and easy in magnetism control, and the uranium content in the low-concentration uranium-containing wastewater with the concentration of 0.45-0.55 mg / L can be reduced by 95 percent or more.

The invention provides a preparation method and an application of a magnetic hydrotalcite / bismuth oxybromide compound, and belongs to the field of inorganic photocatalysis. The compound comprises magnetic hydrotalcite and bismuth oxybromide. The preparation method comprises the following steps: synthesizing hydrotalcite by a coprecipitation technology, synthesizing magnetic hydrotalcite by a solvothermal technology, and finally synthesizing the magnetic hydrotalcite / bismuth oxybromide compound by the solvothermal technology and a calcining technology. The magnetic hydrotalcite / bismuth oxybromide compound of the invention overcomes the defects of bismuth oxybromide and magnetic zinc-aluminum hydrotalcite, has a high electron-hole separation efficiency and high transfer speed, reduces the recombination of electron hole pairs, improves the catalytic reduction activity of visible light to Cr(VI), has the advantages of low cost, convenience in preparation and easiness in separation, can bewidely used in photocatalytic reduction of heavy metal chromium in wastewater to achieve a catalytic effect of 98%, also has a magnetic separation effect, a good stability and a good recyclability, and also has a good catalytic reduction activity in actual wastewater treatment.

The invention provides a surface enhanced raman spectrum based quick tetrodotoxin (TTX)detection method of tetrodotoxin (TTX). A nano Fe3O4 particle is adopted as a magnetic substrate; Fe3O4 is modified in sequence by using tetraethoxysilane (TEOS), 3-aminopropyltriethoxysilane and 3-mercaptopropyltriethoxysilane in sequence; a gold nano particle is adsorbed on a modified magnetic nano particle through the electrostatic adsorption of -NH2 and the action of a Au-S bond; a well assembled gold magnetic nano particle is integrally modified by using the TEOS and the 3-aminopropyltriethoxysilane; an immunocompetent gold magnetic nano particle is used as a raman substrate; RhB-ITC (Rhodamine B-Isothiocyanate) / anti-TTX is used as a raman signaling molecule; the quick detection is carried out on the TTX by utilizing a surface enhanced raman spectrometer; the detection limit can reach 0.01[mu]g / ml in under the condition that the gold magnetic nano particle is concentrated by an outer magnet; the detection linear range is 0.01[mu]g / mL to 0.5[mu]g / mL; the recovery rate of a detected sample is 82.64 to 92.60 percent; the relative standard deviation is 2.6 to 11.1 percent. The detection of the TTX has important significance in the aspects of food safety and medical science.

The invention discloses a diethylenetriamine-modified magnetic graphene oxide adsorbent as well as a preparation method and application of the diethylenetriamine-modified magnetic graphene oxide adsorbent. The preparation method comprises the steps: firstly, introducing ferroferric oxide prepared by using a coprecipitation method to graphene oxide; then, reacting an amino group on diethylenetriamine with an epoxy group or carboxyl on the surface of graphene oxide; and carrying out graft modification on graphene oxide by using the amino group on diethylenetriamine to prepare the diethylenetriamine-modified magnetic graphene oxide adsorbent. The diethylenetriamine-modified magnetic graphene oxide adsorbent disclosed by the invention is a composite capable of adsorbing a large number of heavymetal ions and easy to separate and recover from wastewater and has a good application prospect on adsorbing and removing the heavy metal ions during wastewater treatment.

The invention discloses a magnetic cyclodextrin-based chelated decolorization adsorption material and a preparation method thereof. According to the material, cyclodextrin, epichlorohydrin and polyethylene polyamine are used as raw materials, dialdehyde is used as a crosslinking agent, core-shell type polymer microspheres which are coated with active polymer layers with abundant hydroxyl groups, amino groups and imino groups are synthesized online in the presence of ferroferric oxide microspheres through a reversed-phase microemulsion method, and then the core-shell type polymer microspheres react with carbon disulfide in the presence of an alkali to modify the surfaces of the polymer microspheres with dithioformyl-CSS-. The obtained adsorption material has an excellent capability of removing heavy metal ions and organic pollutants, a great decolorizing capability and good magnetic separation performance and overcomes the defects that traditional adsorbents are poor in heavy metal-organic matter composite pollutant disposal effect, low in efficiency and high in cost, disposal water is colored, it is difficult to separate materials after adsorption, and the operation is tedious. Heavy metal and organic pollutants in wastewater can be efficiently removed synchronously, and automatic control over a decolorizing and adsorption process and operation continuity are realized.

The invention discloses a magnetic putamen MOFs compound drug-loading system of pillararene nano-valve controlled-release, a preparation method and an application thereof, and belongs to the technicalfield of the compound drug-loading system. The preparation method comprises the following steps: using Fe3O4 as a nuclear matrix, enabling MOFs reaction mother solution to directly react with the nuclear matrix through an in-situ growth mode to form the magnetic putamen MOFs, and modifying 'connecting shaft' molecules on the magnetic putamen MOFs material loaded with the drug through a post-modification mode and performing the follow-up installation of the pillararene nano-valve mediated by a subjective and objective acting force, and realizing the controlled-release under the stimulation oflesion environment factors. Through changing the types of the pillararene nano-valve and the 'connecting shaft' molecules, the slow release of the drugs under the stimulation response can be realized.The whole compound material diagnosis and treatment system is capable of realizing the targeting drug release and the controllable drug release behavior by using the controllability of the nano-valveas the opportunity. The multi-functional point-fixing, timing and positioning treatment can be realized by organically combining the molecular chemistry and the material chemistry, so the disease treatment efficiency is improved.

The invention discloses a preparation method, a use method and applications of magnetic carbon nano-tubes. The preparation method comprises: preparing a certain amount of an aqueous solution containing manganese chloride and ferric chloride in a conical flask; adding an appropriate amount of carbon nano-tubes, and stirring uniformly; under a certain stirring speed, carrying out water bath heatingto a temperature of 50-70 DEG C, adding a sodium hydroxide solution, and adjusting the pH value to 9-11; carrying out thermal insulation for 4 h in a water bath pot; cooling, repeatedly rinsing with deionized water, carrying out magnetic separation from the aqueous solution, and drying so as to be spare; metering a certain volume of solutions respectively containing humic acid, methylene blue, methyl orange, phosphate radical, tetracycline and copper ions, and determining the concentrations of the six solutions; respectively weighing a certain amount of the magnetic carbon nano-tubes, adding to the six solutions respectively containing humic acid, methylene blue, methyl orange, phosphate radical, tetracycline and copper ions, adsorbing for 24 h in a 25 DEG C 140 rpm shaking table, respectively sampling, filtering the samples with a filtration membrane, and respectively detecting the concentrations. According to the present invention, the product is suitable for the removal of various pollutants in a water body.

The invention provides a method for preparing magnetic meso-porous silica composite microspheres via a weak hydrolysis system, relates to the technical field of advance nanocomposite materials, and solves the problems that traditional meso-porous silica microspheres are relatively small in the meso-porous size, limited in the loading object and hard to bear micro-molecule protein as enzyme. The method comprises the following steps that magnetic nanoparticle, a surfactant, a hole reaming agent and a hydrolysis catalyst are uniformly dispersed in a hydrosolvent, a silicon source precursor is added, reaction is carried out for 12-48h at 10-80 DEG C, and a product is burned for 1-9 h at 200-500 DEG C in the air atmosphere to obtain the magnetic meso-porous silica composite microspheres. The preparation method is simple in steps, raw materials are easy to obtain, and a synthesis method is suitable and suitable for large-scale industrial production; and the prepared magnetic meso-porous silica composite microspheres includes the meso-structure in the aperture of 5-30nm, substances as enzyme and DNA can be born, the center of the magnetic meso-porous silica composite microsphere includesa relatively large magnetic nanoparticle magnetic core, and a good magnetic separation effect is realized.

The invention relates to a method for activating persulfate to degrade an odor compound in water by virtue of a magnetic nanoparticle. The method comprises the following steps: adding the persulfate as an oxidant into the water containing the odor compound, then adding an Fe3O4 nanoparticle as a catalyst, and performing system oscillation reaction, so as to realize activation of the persulfate for degradation of the odor compound in the water by the magnetic Fe3O4 nanoparticle. According to the method, the catalyst Fe3O4 nanoparticle has high performance, and can be used for rapidly and efficiently catalyzing the persulfate to generate a sulfate free radical and oxidatively degrading the odor compound in the water, and the removal rate is detected to reach 95 percent or more. Compared with the prior art, the method has the advantages of low energy consumption, extensive reactant sources, low cost, easiness for magnetic separation of the catalyst and the like, and is environment-friendly.

The invention discloses a heteropolyacid ionic liquid supported aminated magnetic composite of a date cake structure, a preparation method and an application. The composite is prepared from raw materials including a heteropolyacid ionic liquid and an aminated magnetic composite by supporting the heteropolyacid ionic liquid on an aminated nano magnetic material with an ultrasonic immersing method.The preparation steps are shown as follows: firstly, the heteropolyacid ionic liquid is prepared through a substitution reaction, the aminated magnetic composite is prepared with a solvothermal method, and the heteropolyacid ionic liquid supported aminated magnetic composite is prepared with an ultrasonic supporting method. The product obtained with the method is powdery and brown, has uniform particle size distribution and has the date cake structure and stable properties. The defect of high probability of agglomeration of the magnetic materials is overcome, and the obtained material has gooddispersity, high magnetism and high yield, and raw materials are easy to obtain; the composite has magnetism and catalytic activity and can be effectively used for a catalyst for desulfuration of petroleum samples, and the catalyst can be separately recycled.

The invention discloses a preparation method of a magnetic separable heterogeneous Fenotn catalyst CeO2 / MZFS. The preparation method comprises the following steps that (1) cerium nitrate is dissolvedin water, a magnetic carrier MZFS is added to be stirred uniformly, and then the mixture is dipped for 10-180 minutes; (2) the mixture is heated at the temperature of 50-90 DEG C and stirred and rolled continuously till the water is evaporated completely; and (3) the evaporated sample is calcinated for 20-100 minutes at the temperature of 175-350 DEG C under the air atmosphere and then naturally cooled and ground, and the magnetic separable Fenotn catalyst CeO2 / MZFS is obtained. CeO2 and MZFS in the magnetic heterogeneous Fenotn catalyst CeO2 / MZFS have the synergic catalysis effect, and CeO2 / MZFS have the good catalysis degradation and mineralization effects on OFLX (ofloxacin).

The invention discloses a magnetic iron-based composite oxide adsorbent for removing polymorphic arsenic and a preparation method thereof, and relates to a composite oxide adsorbent for removing arsenic and a preparation method of the composite oxide adsorbent. The invention aims to solve the technical problems that the existing arsenic removal composite oxide adsorbent is difficult to separate, easy to harden and low in removal efficiency. The magnetic iron-based composite oxide adsorbent for removing polymorphic arsenic is of a coated core-shell structure, magnetic ferroferric oxide is used as a core, and copper-lanthanum composite oxide is used as a shell. The preparation process is simple, the materials are environment-friendly, and the raw materials are economical and low in cost; the adsorbent has the advantages of easy magnetic separation of ferroferric oxide and good arsenic adsorption effect of copper-lanthanum composite oxide, and makes up for the deficiency of independent use of each component; the adsorbent is used for removing arsenic in water, has a wide application range and good magnetic separation performance while keeping high arsenic removal efficiency, and can be magnetically separated in three minutes, so that the treatment cost of adsorbing and removing arsenic in water is reduced.

The invention discloses a method for preparing a super paramagnetic carrier of a cross-linking immobilized lipase. The preparation of the super paramagnetic carrier is realized by preparing a nano-magnetic microsphere Fe3O4, coating the nano-magnetic microsphere Fe3O4, functionally modifying the coated nano-magnetic microsphere Fe3O4. A thermo-sensitive material, namely N-isopropylacrylamide, is introduced into the super paramagnetic carrier prepared according to the method, and the structural performance of the carrier can be changed through temperature control, so that the lipase which is immobilized through the super paramagnetic carrier can get out of the interface performance control to realize direct reactions among alcohols, acids and lipids, and separation of the reaction products is facilitated; moreover, lipase activity control through alpha coverage is facilitated. The super paramagnetic carrier is a super paramagnetic polymer microsphere based on the mode of lipase interface activity action; the lipase can be immobilized through the super paramagnetic polymer microsphere; the immobilized lipase is high in magnetic separation performance; 90% or higher of the lipase activity is kept; the detect that the lipase activity in an enzymatic reaction depends on the interface effect is overcome.

A preparation method of a Fe3O4@SiO2@ZnO magnetic nano photocatalyst includes the steps of: 1) weighing 2.24 g of Zn(CH3COO)2.2H2O and adding the Zn(CH3COO)2.2H2O to 100 ml of a DEG solution with supersonic assistance for dissolution, and microwave-heating the solution to prepare a first intermediate reaction solution; 2) weighing 0.2 g of Fe3O4@SiO2 and adding the Fe3O4@SiO2 to 20 ml of a DEG solution with supersonic assistance for dissolution, and microwave-heating the solution to prepare a second intermediate reaction solution; 3) mixing the two intermediate reaction solutions and microwave-heating the solution to obtain a mixture reaction solution; and 4) cooling the mixture reaction solution to room temperature, performing centrifugal separation, and cleaning and drying the product. Compared with a photocatalyst in the prior art, the Fe3O4@SiO2@ZnO has stronger photocatalytic activity, better stability, and wider application range, and has advantage on reduction of secondary pollution due to excellent magnetic separation performance.

The invention provides a magnetic separation-membrane distillation device for purifying sewage and recycling useful components and application of the magnetic separation-membrane distillation device,and belongs to the technical field of sewage resource utilization. The device comprises a high gradient magnetic separator, a liquid storage tank, a magnetic pump a, a constant temperature heating water bath kettle, a rotor flow meter a, a membrane component, a rotor flow meter b, a low-temperature constant temperature water tank, a magnetic pump b, a produced water collecting device and a membrane distillation water discharge tank. Flocculants and magnetic seeds are put in sewage, then the sewage is pretreated by adopting a high-gradient magnetic separation technology, and then, the sewage isdelivered into the membrane component to be subjected to membrane distillation treatment. The magnetic separation-membrane distillation device and the application thereof provided by the invention can solve the problem of environmental pollution caused by sewage discharge and can realize recycling of the useful components, and the magnetic separation-membrane distillation device has the advantages of low energy consumption, high efficiency, simple equipment, big processing capacity and the like.

The invention relates to a solid magnetic heavy metal ion separation material and a preparation method of the separation material. Epoxy chloropropane and triethylene tetramine perform a polymerization reaction in the presence of a ferroferric oxide microsphere to generate linear high polymer chains; the surface of the ferroferric oxide microsphere absorbs and is wound with the linear high polymerchains in situ; the high polymer chains are further cross-linked by using glutaric dialdehyde in methylbenzene, so that the surface of the ferroferric oxide microsphere is coated with the high polymer chains stably; an iminodiacetic acid group is connected to a high polymer chain net on the surface of the ferroferric oxide microsphere via a dialdehyde substance, so that the surface of the ferroferric oxide microsphere is coated with the high polymer chain net containing rich active groups such as -N(CH2COO-)2, -NH2, -NH- and -OH; the trapping and absorbing capacity on heavy metals is greatlyimproved; the material has excellent magnetic separation performance; the subsequent separation is simple; continuous absorption and separation operation can be achieved; and the material is convenient in industrial application and popularization.

The invention provides a preparation method of magnetic activated carbon based on black liquor lignin and Fenton sludge, comprising the following steps of: (1) acidifying, flocculating, cleaning and concentrating black liquor to obtain a black liquor lignin concentrated sample; (2) cleaning and concentrating the Fenton sludge to obtain a Fenton sludge concentrated sample; (3) fully mixing the black liquor lignin concentrated sample, the Fenton sludge concentrated sample and an activating agent according to a certain ratio, dipping for a period of time, and drying and grinding the dipped sampleto obtain a ground sample; (4) putting the ground sample into nitrogen for pyrolysis activation, activating for a period of time at a set activation temperature, and then naturally cooling to room temperature to obtain a pyrolysis sample; and (5) taking out the pyrolysis sample, respectively cleaning with dilute acid and water, and then carrying out low-temperature vacuum drying to obtain the magnetic activated carbon. The magnetic activated carbon prepared by the invention has the characteristics of strong adsorption performance, high magnetic separation effect and high strength.

A preparation method of an egg yolk-eggshell structure composite material, relating to the field of nanomaterial technology, assembling 15nm Fe3O4 particles onto the surface of Au@SiO2 core-shell materials, using hexadecyltrimethylammonium bromide as a template agent, orthosilicon Au@SiO2@Fe3O4 is coated with SiO2 on the surface of Au@SiO2@Fe3O4, and Na2CO3 is used to selectively etch the material to remove CTAB to obtain Au@Fe3O4@m-SiO2 egg yolk-eggshell structure composite material. The invention has the advantages that the thickness of the prepared composite material mesoporous SiO2 shell layer is controllable, has good magnetic separation effect, is beneficial to recovery and recycling, and can be applied in fields such as catalysis.

The invention discloses a full-automatic chemiluminiscence tester and belongs to the field of chemiluminiscence testing.The full-automatic chemiluminiscence tester comprises a mechanical arm module, a refrigeration module, a power module, a reagent sample disk, a sampling needle component, a stirring component, a reaction cup frame, an incubation device, a magnetic separation component, a washing station component and a measuring room.Full-automatic management is achieved for mixing, reacting, incubating, magnetic separating, detecting and other procedures of a sample to be tested, the detection efficiency is improved, and operation errors are reduced.