53results about How to "Good magnetic separation performance" patented technology

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 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 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 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 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 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 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.

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.