555 results about "Adsorption method" patented technology

The invention discloses a vacuum adsorption device and an adsorption method, the device comprises a carrying table and a driving device, vacuum holes and sealing holes which are distributed in a staggered manner are formed in the surface of the carrying table, and a plurality of independently controlled vacuum areas are formed. Each area is provided with an independent vacuum pipeline, a pressure controller and a switch, and precise negative pressure regulation and control are achieved. The lifting sealing ring is arranged in the sealing hole, the height is adjusted through the driving device, and the position of the sealing ring and the warping state of the wafer are monitored in real time through the detection device. In the adsorption process, if warping exists, the height of the sealing ring is automatically adjusted, the wafer is flattened step by step in a subsection adsorption mode of subarea control, and global adsorption is started after the heights of all the sealing rings are consistent. According to the method, the problem that a traditional adsorption mode is poor in adaptability to large-warping wafers is effectively solved through the partition control and dynamic adjustment technology, the method has the advantages of being stable in adsorption, uniform in stress, low in breakage rate and the like, and the process compatibility and the production yield are remarkably improved.

The invention provides a method for detecting the porosity of in-situ dump-leached ore, and belongs to the technical field of ore porosity detection. The method comprises the following steps: taking an ore body on site, preparing a filling agent, performing vacuum gradient impregnation, curing, dissolving and separating the ore to obtain a pore model; melting and softening the pore model to obtain the pore volume in the ore, and finally obtaining the porosity of the ore; wherein nano SiO2 is added into the filler resin, and permeation of tiny pores is guaranteed based on the size effect and the interface optimization effect of a nano material; and through vacuum gradient impregnation, sufficient permeation of tiny pores is further ensured. According to the detection method, the limitation of a drainage method on ore pores containing water-soluble minerals is avoided; the problems that ore samples need to be collected and taken back to a laboratory to be detected in a mercury injection method, a gas adsorption method and the like, the ore body structure is damaged, and consumed time is long are solved. Detection can be carried out on site, ore permeability parameters are provided for the in-situ dump leaching process, and a real-time basis is provided for flow selection.

The unstacker comprises a feeding assembly, a lifting assembly, a positioning assembly and a discharging assembly, the feeding assembly is composed of a plurality of feeding supports distributed side by side, the lifting assembly is fixedly installed on one side of the feeding assembly, a motor frame is fixedly installed on one side of the top of the lifting assembly, the positioning assembly is fixedly installed on the top of the lifting assembly, and the discharging assembly is fixedly installed on the motor frame. The discharging assembly is fixedly installed on one side of the top of the lifting assembly. Stacked bagged materials can be driven to achieve feeding through lifting and stable traction of the supporting plate, conveying of each layer of materials during unstacking is facilitated, movement in the horizontal direction is achieved through the positioning assembly, accurate positioning can be achieved when the bagged materials are grabbed, bagged material suction is achieved through a negative pressure suction mode of a suction cup, and the bagged materials can be conveniently conveyed. The bagged materials are grabbed through the feeding assembly, heavy materials are lifted through the rotatable suction cup, meanwhile, the grabbed bagged materials are conveyed through the discharging assembly, meanwhile, it can be ensured that the conveying direction of the bagged materials is adjusted, and continuous unstacking of the bagged materials can be achieved.

The invention relates to the technical field of intelligent manufacturing, in particular to a stamping production line mechanical arm which comprises a mounting pipe, a connecting frame arranged on one side of the mounting pipe, a fixing frame fixedly connected to one side of the connecting frame, and a rotating shaft arranged on one side of the fixing frame and rotationally connected in a penetrating mode. Rotary feeding and discharging of the multiple suction cups are driven through rotation of the rotating frame, the feeding process of raw materials and the discharging process of products are completed by rotating by 180 degrees, the efficiency of the feeding process of the raw materials and the efficiency of the discharging process of the products can be improved, and meanwhile through the mode that the multiple suction cups rotate, make contact and adsorb, the efficiency is improved. Products in different shapes can be adaptively adsorbed and fixed, the products in different shapes can be conveniently adsorbed in the feeding and discharging process, the overall stamping production efficiency is improved, the automatic feeding and discharging process of stamping production can be conveniently achieved in cooperation with program control and program adjustment of a controller, and the production efficiency is improved. Therefore, the automatic driving and the automatic up-and-down material taking process in the stamping production process are achieved.

The invention provides an amidoxime functionalized MXene / CoZn-MOF heterostructure flowing electrode, a preparation method thereof and application of the amidoxime functionalized MXene / CoZn-MOF heterostructure flowing electrode to efficient adsorption of uranium in wastewater, and belongs to the technical field of sewage treatment. The flow electrode with the amidoxime functionalized MXene / CoZn-MOF heterostructure is prepared by taking MXene nanosheets, polyvinylpyrrolidone, zinc nitrate, cobalt nitrate, imidazole-2-formaldehyde and amidoxime functionalized diaminomaleonitrile as raw materials, and is further applied to a flow electrode capacitive deionization system for efficient adsorption of uranyl ions. The flow electrode prepared by the invention has the advantages of multiple micropores, high specific capacitance, high conductivity, outstanding rheological property and the like, can still keep relatively high adsorption capacity under a seawater condition, can be used for treating wastewater containing hexavalent uranium, is easy to recycle and recycle, and is environment-friendly.

To provide an adsorption system and an adsorption method which can improve adsorption efficiency of a gas component.SOLUTION: An adsorption system 1 adsorbs a predetermined gas component, from a gas containing a predetermined gas component serving as an adsorption target, and water vapor. The adsorption system 1 includes: an adsorption part 13 for adsorbing the predetermined gas component from the gas; a measurement part 11 for measuring humidity of the gas; and a flow rate control part 12 for controlling the flow rate of the gas supplied to the adsorption part 13, on the basis of the humidity measured by the measurement part 11.SELECTED DRAWING: Figure 1

The invention relates to a preparation process and method for coating tungsten-doped vanadium dioxide nano-particles on the surface of silicon dioxide in a self-adsorption mode and application of the tungsten-doped vanadium dioxide nano-particles. The process sequentially comprises the steps of pretreatment of silicon dioxide and tungsten-doped vanadium dioxide particles and preparation of a core-shell structure formed by self-adsorption of the silicon dioxide and the tungsten-doped vanadium dioxide particles. The method comprises the basic operation procedures of grinding silicon dioxide microspheres, treating tungsten-doped vanadium dioxide particles with deionized water, setting stirring parameters and centrifugal parameters and the like. The invention also relates to application of the tungsten-doped vanadium dioxide and silicon dioxide core-shell structure prepared by using the self-adsorption method in adjustable transmittance and adjustable radiation capability in the fields of intelligent window energy-saving glass and radiation refrigeration. The problems that a traditional vanadium dioxide nanoparticle film is low in visible light transmittance, poor in near-infrared modulation capacity, adjustable in infrared radiance and the like are solved.

The invention discloses a pesticide slow-release granule suitable for simultaneous sowing of pesticide and plant seeds. The pesticide sustained-release granule has double coating layers, the first coating layer takes a pesticide effective component A as a core and a nano calcium carbonate carrier material as a shell, and nano calcium carbonate is used for carrying out first-layer coating on a bactericide effective component through a physical adsorption method; the second coating layer is formed by mixing the first coating layer and the pesticide active ingredient B as a core and taking materials such as attapulgite as a shell. The sustained-release granule has good sustained-release performance, can stably release effective components in a long time, prolongs the pesticide effect period, reduces frequent pesticide application operation, and further improves the pesticide utilization rate.

The invention provides a cyanide breaking agent and method for treating alkaline cyanide-containing wastewater. The cyanide breaking agent is a combination of an oxidizing agent, a Fe3O4 ZIF-8 core-shell magnetic catalyst and PDMS-hydrophobic silicon dioxide composite liquid. Through a catalytic oxidation-adsorption integrated method, the reaction path is shortened, efficient removal of cyanide is realized, the effluent is far lower than 0.5 mg / L specified by the national standard, a recyclable product is obtained, and the risk of secondary pollution caused by HCN or heavy metal precipitation is reduced; non-photocatalytic nanoscale Fe3O4-ZIF-8 core-shell magnetic catalyst particles are combined with PDMS-hydrophobic silicon dioxide composite liquid to cooperate with an oxidizing agent, the process that cyanide is converted into non-toxic products through integrated two-stage oxidation is promoted, and meanwhile the content of ammonia nitrogen in wastewater is further reduced by combining modified activated carbon.

The invention belongs to the technical field of pyrolytic carbon black quality detection methods, and particularly relates to a method for determining the specific surface area of carbon black. The method for measuring the specific surface area of the carbon black comprises the following steps: firstly, adding an additive into the carbon black, stirring, centrifuging and filtering; the auxiliary agent is prepared by compounding polyacrylamide, dipolyglycerol dioleate and water; adding water for cleaning, centrifuging, filtering and drying; and finally calculating the specific surface area of the carbon black through a gas adsorption method. According to the method, the carbon black is pretreated, so that the influence of surface oxygen-containing functional groups, aromatic ring impurities and the like on nitrogen adsorption is effectively eliminated, and the problem that the pore structure of the carbon black is damaged by high-temperature degassing in a traditional method is solved through proper microwave irradiation, so that the measured specific surface area result is closer to a true value; methodologies such as precision and repeatability are more stable.

The invention relates to the technical field of tail gas treatment, in particular to a hydrogen fluoride preparation tailing acid gas adsorption device and an adsorption method.The hydrogen fluoride preparation tailing acid gas adsorption device comprises a treatment box, a reaction cavity and an adsorption cavity are formed in the treatment box, and a reaction barrel is fixedly installed in the reaction cavity; a stirring shaft is rotatably mounted on the inner wall of the top of the adsorption cavity, a driving motor is arranged at the top of the treatment box, an output shaft of the driving motor extends into the treatment box and is connected with the top end of the stirring shaft, and the bottom end of the stirring shaft extends into the reaction barrel and is fixedly provided with a rotating plate; a rectangular cavity is formed in the rotating plate, an L-shaped hole is formed in the inner wall of the side portion of the rectangular cavity, and a first L-shaped connecting pipe is fixedly arranged in the L-shaped hole. Waste gas can be uniformly guided into all positions in the reaction barrel, the uniform gas guiding function is achieved, a neutralizing agent can make full contact with the waste gas conveniently, and the waste gas treatment function is achieved.

The invention relates to the technical field of heavy metal recovery, in particular to a method for recovering heavy metal from metal waste. Comprising the following steps: preparing silicon-tungsten composite acid salt; preparing heteropolyacid powder; preparing a resin heteropolyacid composite material; heavy metals are recovered from metal wastes by a resin adsorption method. The silicon-tungsten composite acid salt is prepared under mild conditions through reaction of sodium metasilicate, sodium tungstate and potassium chloride, the operation is simple, the conditions are easy to control, the silicon-tungsten composite acid salt has rich active sites and a large specific surface area, the surface of the silicon-tungsten composite acid salt carries negative charges, and the surface of the silicon-tungsten composite acid salt is not prone to damage. Compared with a traditional chemical precipitation method, the method for extracting the heavy metal by using the silicon-tungsten composite acid salt does not need to add a large number of chemical reagents, and secondary pollution is reduced.

The invention discloses a metal polyphenol network modified drug-loaded radioactive microsphere as well as a preparation method and application thereof, radionuclides are labeled on different microspheres by a precipitation method or an adsorption method, and the metal polyphenol network is modified on the surface of the radioactive microsphere to improve the nuclide labeling stability and the synchronous drug loading capability of the radioactive microsphere. Subsequently, medicine molecules can be adsorbed to the modified radioactive microspheres to obtain the metal polyphenol network modified medicine-carrying radioactive microspheres. The metal polyphenol network modified drug-loaded radioactive microspheres prepared by the invention can solve the problems of radionuclide non-target shedding and DNA damage repair caused by nuclear drugs, avoid secondary drug administration, ensure that drugs directly and accurately reach tumor targets, and improve the drug delivery efficiency. And the selective internal irradiation therapy based on radioactive microsphere mediation is further promoted to play a more effective tumor treatment effect.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method of a palladium catalyst for hydrogen peroxide production by an anthraquinone process, which comprises the following steps: at a certain temperature, alumina powder is impregnated in a palladium salt solution for equivalent-volume impregnation for a certain time, and alumina comprises gamma-Al2O3 and alpha-Al2O3; after impregnation is completed, deionized water is added into the solid, chloride ions are removed through electro-adsorption after ultrasonic treatment, and then a filter cake is obtained through filtering; according to the preparation method of the palladium catalyst, the aluminum oxide with the crystal phase in the specific proportion is matched with the ultrasonic treatment and the electro-adsorption method, the prepared catalyst has the advantages of being high in selectivity, good in catalytic activity and mechanical property and stable in product quality, chloride ions are easy to remove, and waste of a large number of water resources is avoided.

The invention provides a wafer adsorption system and a wafer adsorption method. The wafer adsorption system comprises a wafer bearing module, an adsorption module and a control module. The wafer bearing module comprises a transparent bearing platform, a center detector and a plurality of edge detectors; the transparent bearing platform is used for bearing a wafer; the center detector is used for detecting the distance between the center detector and the wafer center; the plurality of edge detectors are used for detecting the warping degree of the edge position of the wafer; the adsorption module comprises an adsorption main body, a suction cup and a plurality of first adsorption channels; multiple suckers are evenly distributed at the bottom of the adsorption body. A plurality of uniformly distributed suction holes are formed in the bottom of the sucker; the multiple first adsorption channels are located in the adsorption main body, and adsorption force is transmitted to the suction cup through the threaded connector; the control module is used for controlling operation of the adsorption module. The wafer adsorption system can realize front adsorption of wafers with different warping degrees, can avoid damage to the surfaces of the wafers, and improves the working efficiency.

The invention relates to a salt lake lithium extraction titanium adsorption material and a preparation method thereof, and relates to the technical field of adsorption materials.The preparation method of the salt lake lithium extraction titanium adsorption material comprises the following steps that a titanium source and a lithium source are mixed and then subjected to first magnetic field sintering, and a first precursor is obtained; performing second magnetic field sintering on the first precursor to obtain a second precursor; performing third magnetic field sintering on the second precursor to obtain a third precursor; adding the third precursor into an acid solution for acidification, and then filtering and drying to obtain the titanium adsorption material for extracting lithium from the salt lake. According to the method, a three-section magnetic field sintering mode is adopted, the lithium element adsorption capacity and desorption rate of the obtained titanium system adsorption material are remarkably improved by controlling condition parameters of all stages, the efficient and stable titanium system adsorption material is provided for the field of salt lake lithium extraction, and the defects in the prior art are overcome.

The invention discloses a coal reservoir full-aperture pore structure characterization method based on a hole connection method. The method comprises the following steps: taking the same sample, carrying out a low-temperature carbon dioxide experiment, a low-temperature liquid nitrogen adsorption experiment and a mercury injection experiment, and obtaining experiment data; after carrying out compressibility correction on the mercury injection experiment data, selecting a connection aperture with the low-temperature liquid nitrogen adsorption experiment data; selecting the connection aperture of the low-temperature carbon dioxide experiment data and the low-temperature liquid nitrogen adsorption experiment data; and representing the full-aperture pore structure of the coal reservoir based on the joint aperture combined with the low-temperature carbon dioxide experimental data, the low-temperature liquid nitrogen adsorption experimental number and the mercury injection experimental data after compressibility correction. According to the characterization method, a mercury injection method, a low-temperature liquid nitrogen adsorption method and a carbon dioxide adsorption method are combined to characterize the pore structure of the full pore diameter of the coal reservoir, the accuracy of the pore diameter distribution test result in the coal can be remarkably improved after pore connection, and the nano-scale to micron-scale pore structure characteristics of the coal reservoir can be effectively characterized from different scales.

The invention provides a self-adaptive adsorption platform and a negative pressure adsorption method, and the self-adaptive adsorption platform comprises a product bearing module which comprises at least one adsorption area which can be independently controlled, the adsorption area is provided with a plurality of adsorption units, and the adsorption units are switched between a conduction state and a closed state according to air pressure changes; the negative pressure generation module comprises negative pressure cavities and negative pressure sources which correspond to the adsorption areas, the negative pressure cavities are connected with the negative pressure sources through first gas paths, and first control valves are arranged on the first gas paths; when the first control valve is opened, the adsorption unit covered by the product is in a conducting state under the action of negative pressure and adsorbs the product; and the adsorption unit which is not covered by the product is switched to a closed state under the action of negative pressure to block the communication with the outside. Effective adsorption areas can be dynamically divided according to the product size, and ineffective energy consumption caused by traditional global adsorption is avoided; the adsorption units which are not covered with the products are rapidly closed under the action of negative pressure, external air path communication is blocked, and negative pressure leakage is reduced.

The invention provides a preparation method of dendrobium huoshanense polysaccharide, which comprises the following steps: firstly, pretreating dendrobium huoshanense through steam explosion, then extracting water-soluble polysaccharide by using a hot water extraction method, then separating out the polysaccharide by using a low-temperature alcohol precipitation method, removing protein and pigment by using a Sevag method and a macroporous resin adsorption method, and then separating out the dendrobium huoshanense polysaccharide. Dialyzing the polysaccharide solution through a regenerated cellulose dialysis bag to remove substances with the molecular weight less than 2000Da, finally freeze-drying to obtain a dendrobium polysaccharide crude product, and further separating and purifying to obtain the refined dendrobium polysaccharide. In-vitro experiments show that the refined dendrobium polysaccharide has remarkable antioxidant activity and antitumor activity, and has a better application prospect in the fields of skin care and medicines.

The invention relates to the technical field of biological detection, and provides a kit and a method for rapidly detecting a platelet antibody by utilizing a phytolectin solid-phase adsorption method. The detection kit provided by the invention comprises a reaction plate which is coated with phytolectin and adsorbs platelets. According to the method, the platelet of multiple persons is adsorbed by utilizing the non-specific adsorption capacity of the phytolectin, and the adsorbed platelet is directly freeze-dried to the bottom of a microwell plate. During use, a detection result can be obtained only by adding detected plasma / serum into the reaction plate for incubation and then adding an anti-human globule reagent and indicating red blood cells, so that intermediate links of detection are reduced, and standardization and automation of detection are facilitated.

The invention discloses a detachable soft gasket and method for thin plate grinding deformation control. The soft gasket structurally comprises a friction adsorption enhancement layer, a micropore vibration reduction layer and an elastic supporting layer which are detachably connected in sequence from top to bottom. In the soft gasket, the elastic supporting layer provides flexible buffering, the micropore vibration reduction layer absorbs machining vibration through a closed-cell micropore structure, the friction adsorption enhancement layer enhances the adsorption force and stability through non-uniform waveform raised grains and conical grooves, the bottom of the friction adsorption enhancement layer is designed in a sealed mode, grinding fluid permeation is effectively prevented, and all the layers cooperate with one another to improve the machining precision. The soft gasket is designed to be of a multi-layer structure, machining deformation is effectively reduced by providing a positioning reference, and the problems of initial deformation, end face jumping and planeness out-of-tolerance of the thin plate caused by a traditional rigid fixing or adsorption mode can be remarkably solved.

The invention relates to a carbon dioxide trapping device and method. The device comprises a first membrane separation unit, an adsorption unit, a desorption unit and a second membrane separation unit, wherein the first membrane separation unit is used for performing membrane separation treatment on flue gas to be treated; the adsorption unit is used for carrying out carbon dioxide adsorption treatment on the intercepted gas; the desorption unit is used for carrying out carbon dioxide removal treatment on the adsorbent adsorbed with carbon dioxide in the adsorption unit; and the second membrane separation unit is used for carrying out membrane separation treatment on the permeation desorption gas. The carbon dioxide trapping device / method provided by the embodiment of the invention has the characteristics of low energy consumption and high trapping rate, and can overcome the defects of high energy consumption and low trapping rate in the existing carbon dioxide trapping technologies of an adsorption method and a membrane separation method.

The invention discloses an evanescent mode casting positioning device capable of controlling the size A. The evanescent mode casting positioning device comprises a mounting seat, the top of the mounting seat is provided with an adaptive mechanism for assisting mounting, and the mounting seat is internally provided with a positioning mechanism for positioning the die body; through cooperative arrangement of the adaptation mechanism, the positioning mechanism and the inner clamping mechanism, positioning is not limited by the density of foam any more, clamping jaws on the two sides of the A-size tool are opened to make contact with a white mold, negative pressure is generated through a vacuum pump, the white mold is adsorbed to the clamping jaws, then the A-size white mold is pulled back to a standard position, and positioning is achieved. The device is more accurate and stable, operation is more convenient, time is saved, according to cooperation between the adaptation mechanism and the positioning mechanism, positioning work of the placed white mold can be achieved, the inner clamping mechanism can clamp the white mold inwards from the inner side wall, the white mold can be driven to be pulled back to the preset position in a pneumatic negative pressure adsorption mode, and the labor intensity of workers is lowered. Therefore, the accuracy is ensured.

The present invention provides a metal nanomaterial which has a higher specific surface area than conventional metal nanomaterials. The present invention relates to a metal nanomaterial which has a specific surface area of 60 m2 / g or more as determined by a nitrogen gas adsorption method.

The utility model provides a BOG (Boil Off Gas) dehydrogenation system, which belongs to the technical field of gas separation and comprises a dehydrogenation device, the dehydrogenation device is connected with a mixed gas source unit and a circulating heat exchange medium unit, and one end, far away from the mixed gas source unit, of the dehydrogenation device is connected with a dehydrogenation mixed gas unit; the dehydrogenation device comprises a heat exchange box body, a plurality of hydrogen storage alloy tank bodies are arranged in the heat exchange box body, each hydrogen storage alloy tank body is connected with a mixed gas inlet and a mixed gas outlet, the mixed gas inlet is connected with a mixed gas source unit, and the mixed gas outlet is connected with a dehydrogenation mixed gas unit; the BOG gas dehydrogenation system further comprises a control system, and the control system is connected with the dehydrogenation device. According to the BOG dehydrogenation system disclosed by the utility model, the purpose of hydrogen separation is achieved by adopting reversible reaction of hydrogen storage alloy and hydrogen adsorption, the process is carried out under the conditions of normal temperature and low pressure, and compared with the existing methods of low-temperature separation, high-pressure adsorption and the like, the energy consumption is greatly reduced, and energy conservation and emission reduction are facilitated.

The invention discloses a purging method which is applied to a pressure swing / temperature swing adsorption method, and the purging method comprises the following steps: at least blowing high-purity gas into an adsorption tower from one end of the adsorption tower, so that when the pressure swing / temperature swing adsorption reaches a stable state, the gas distribution in the adsorption tower is changed from a first state to a second state; in the first state, the concentration of target gas adsorbed in the molecular sieve is not less than a first threshold value; in the second state, the concentration of the target gas adsorbed in the molecular sieve is not less than a first threshold value, the concentration of the target gas in the mixed gas outside the molecular sieve is not less than a target gas concentration expected value in the desorption gas, and the desorption gas in the mixed gas at the two ends of the molecular sieve bed layer is not less than a second threshold value; the target gas concentration in the mixed gas at at most one end is not greater than a first preset value. According to the invention, the concentration of the target gas in the desorption gas can be effectively improved.

The invention provides a phospholipid type DHA (Docosahexaenoic Acid) synthesis method based on immobilized phospholipase A1 of a magnetic composite material MnFe2O4-SiO2. The method comprises the following steps: (1) preparing MnFe2O4 magnetic nanoparticles by adopting a hydrothermal method; (2) coating the surface of the MnFe2O4 with SiO2 through a chemical precipitation method, so as to prepare a MnFe2O4-SiO2 composite material; (3) by using phospholipase A1 (PLA1) as a catalytic enzyme, immobilizing PLA1 on the surface of the MnFe2O4-SiO2 composite material through a chemical crosslinking or physical adsorption method; (4) under optimized reaction conditions, catalyzing free fatty acid to react with phospholipid by the immobilized enzyme to synthesize phospholipid type DHA; and (5) separating and recovering the immobilized enzyme through an external magnetic field, and after the immobilized enzyme is repeatedly used for 5-10 times, keeping the catalytic activity of 65-75%. According to the method, the stability and reusability of the enzyme can be remarkably improved, the production cost is reduced, and meanwhile, the method is applied to catalytic synthesis of the phospholipid DHA and has a wide industrial application prospect.

[Problem] To provide: a coating composition that uses silica particles in which aluminum atoms are bonded to the surfaces of the silica particles at a specific ratio in terms of Al2O3; a laminated substrate that uses the coating composition; and a method for producing the laminated substrate. [Solution] Silica particles to be added to a coating composition contain aluminum atoms forming aluminosilicate sites on the silica particles, wherein the aluminum atoms, which are present in the whole silica particles measured by a dissolution method using a hydrofluoric acid aqueous solution, are bonded to the silica particles at a ratio of 120-50,000 ppm / SiO2 to 1 g of SiO2 of the silica particles in terms of Al2O3. In the silica particles, the ratio of the [specific surface area (C) obtained through the BET method (nitrogen gas adsorption method)] to the [specific surface area (D) converted using a transmission electron microscope] is 1.00-5.00.

The present invention discloses a method for adsorbing radioactive iodide ions in radioactive wastewater, which includes the following process: adding silver copper oxide to the radioactive wastewater, and the iodide ions in the radioactive wastewater react with the silver copper oxide, so that the concentration of iodide ions in the radioactive wastewater is reduced. The adsorption of radioactive iodide ions in radioactive wastewater by the silver copper oxide of the present invention belongs to chemical adsorption, which has the characteristics of fast adsorption speed, high adsorption efficiency and adsorption capacity, the adsorbed product is not easy to desorb, is easy to solidify and dispose, is convenient for recycling, is convenient to use and is not easily affected by interfering ions and pH. The silver copper oxide has a strong selective adsorption effect on iodide ions in the wastewater environment of long half-life radioactive element iodine, and can effectively improve the radioactive pollution of iodine in the water environment, and solve the main problems of spent fuel reprocessing and radioactive water pollution.

The invention provides an efficient and recyclable electro-adsorption method for removing perfluorinated compounds in water and an electrode material by taking the most widely distributed perfluorinated butanesulfonic acid in the perfluorinated compounds as a target. Chitosan and magnetic nano ferroferric oxide are selected as raw materials for modifying activated carbon to prepare a nano Fe3O4 / chitosan / activated carbon composite electrode, the nano Fe3O4 / chitosan / activated carbon composite electrode is used as an anode, activated carbon is used as a cathode, 0.8-5V working voltage is applied, and the composite electrode is used for electro-adsorption and desorption of perfluorinated compounds in water. Therefore, on-line adsorption, desorption and concentration of the perfluorinated compounds are realized, and the purposes of controllable and efficient removal, enrichment and recovery of the perfluorinated compounds are achieved.