413 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 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 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 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 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 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.

The invention discloses a method for producing hydrogen by gasifying plastic biomass, which comprises the following steps of: physically grading waste plastics according to different types (such as polyethylene, polypropylene, polyvinyl chloride and the like), sorting and treating the waste plastics by adopting an infrared component analyzer, a pyrolysis experiment, laser cutting and other technical means, adjusting the particle size of the waste plastics to be 1-3cm, and carrying out extrusion molding on the waste plastics. And a proper treatment mode is adopted according to pyrolysis characteristics of different plastics, so that the gasification reaction efficiency is improved. Therefore, through fine temperature and atmosphere regulation and control, the hydrogen generation efficiency is improved, the emission of byproducts is reduced, the catalytic efficiency is improved by introducing the composite catalyst, the service life of the catalyst is prolonged, the hydrogen purification process adopts the combination of membrane separation and a temperature swing adsorption method, so that the hydrogen purity reaches 99.99% or above, and the production cost is reduced. According to the technology, the hydrogen yield and purity are remarkably improved, the service life of the catalyst is prolonged, meanwhile, emission of greenhouse gas and harmful by-products is effectively reduced, and remarkable economic and environmental benefits are achieved.

The invention relates to the technical field of medical instruments, and discloses a medical X-ray protection device which comprises a base, a frame arranged at the top of the base, two sliding rods arranged on the front face of the frame, two shielding plates arranged on the outer sides of the sliding rods and fixing assemblies arranged on the back faces of the shielding plates. The fixing assembly specifically comprises a sliding base arranged on the back face of the shielding plate and a sliding block arranged in the sliding base. According to the medical X-ray protection device, by arranging the adjusting assembly, when the position of the shielding plate needs to be adjusted, the control plate is pressed downwards, so that the shielding plate can be freely moved to slide on the sliding rod, the control plate is loosened after the shielding plate moves to the corresponding position, the adsorption pad is tightly adsorbed to the outer side of the sliding rod, the shielding plate cannot move any more, and positioning is completed; according to the method, control is convenient, rapid adjustment can be achieved, one-hand operation can be achieved, meanwhile, a negative pressure adsorption method is adopted, and the effective fixing effect can be maintained all the time before the communicating groove is aged.

The invention relates to a micropore-mesopore X molecular sieve, which is measured by a nitrogen physical adsorption method, the micropore specific surface area is 450-640m < 2 > / g, the mesopore specific surface area is 20-50m < 2 > / g, the pore size distribution curve shows at least two mesopore distribution peaks, the most probable pore size corresponding to one mesopore distribution peak is in the range of 3.0-7.0 nm, and the most probable pore size corresponding to the other mesopore distribution peak is in the range of 3.0-7.0 nm. And the most probable pore diameter corresponding to the other mesoporous distribution peak is in the range of 10.0-19.0 nm. The molecular sieve has good mass transfer performance and high aromatic hydrocarbon adsorption selectivity.

The invention discloses a bio-trickling filter filler based on a metal organic framework. The bio-trickling filter filler comprises soluble metal salt, an organic ligand and an adhesive. The preparation method comprises the following steps: mixing a soluble metal salt and an organic ligand in a solvent, and carrying out a heating reaction to obtain the metal organic framework material, mixing and granulating the metal organic framework material and an adhesive to obtain the bio-trickling filter filler based on the metal organic framework. The bio-trickling filter filler is simple in preparation method, stable in structural performance, extremely large in specific surface area and high in biological adsorption capacity, has a good adsorption effect on sulfur-containing foul waste gas, is relatively high in degradation efficiency, can effectively combine an adsorption method and a biological method, and can play the advantages of the adsorption method and the biological method; the removal rate of hydrogen sulfide, organic sulfide and benzene series in the sulfur-containing foul waste gas can reach 99.5%.

The invention discloses a uranium adsorption method. The uranium adsorption method comprises the following steps: (1) mixing paraffin containing 6-10 carbon atoms with a span emulsifier to obtain a continuous phase; the preparation method comprises the following steps: mixing 1-vinyl imidazole, N, N-methylene bisacrylamide and azodiisobutyronitrile to obtain a dispersed phase; wherein on the basis of 45 mL of 1-vinyl imidazole, the use amount of the N, N-methylene bisacrylamide is 3 to 7 g, and the use amount of the span emulsifier is 10 to 30 mL; adding the dispersed phase into the continuous phase, heating to T1, and then heating to T2 to obtain the uranium adsorption material, wherein T1 ranges from 85 DEG C to 95 DEG C, the time from the initial temperature to T1 ranges from 1.5 h to 2.5 h, and T2 ranges from 95 DEG C to 110 DEG C; (2) placing the uranium adsorption material in a uranium solution for adsorption; the pH value of the uranium solution is 4.5-6. By adopting the uranium adsorption method, the uranium adsorption capacity of the uranium adsorption material can be improved.

The invention relates to the technical field of agricultural biological prevention and control, and discloses a biological prevention and control complex microbial inoculant and application thereof.The biological prevention and control complex microbial inoculant is prepared by the steps that natural bio-based compounds vanillin and vanillic acid serve as main raw materials, and a biodegradable trialdehyde monomer is designed and synthesized; a biodegradable trialdehyde monomer and p-phenylenediamine are used as organic building units to assemble and form an ordered porous crystal structure, and the biodegradable COF material is obtained; the preparation method comprises the following steps: loading a basic complex microbial inoculant consisting of bacillus thuringiensis, bacillus subtilis and streptomyces willerigensis on a biodegradable COF material by adopting an impregnation adsorption method, and coating the surface of the biodegradable COF material with tetraethylenepentamine and tannic acid through copolymerization to form a degradable polytannic acid layer, so as to prepare the slow-release complex microbial inoculant, and the effective active components of the slow-release complex microbial inoculant can be slowly released; the lasting period and the utilization rate of the composite microbial agent can be remarkably improved, and the composite microbial agent shows an obvious inhibition effect on pathogenic bacteria such as fusarium oxysporum and botrytis cinerea and can be applied to prevention and treatment of plant diseases.

The invention discloses self-healing microorganism full-recycled concrete and a preparation method thereof, and belongs to the technical field of concrete materials. Modified microorganism-loaded ceramsite is adopted to load different microorganisms through a vacuum adsorption method and a soaking method; the concrete is composed of the high-alumina fly ash-slag cement, the microbe reinforced recycled fine aggregate, the microbe reinforced recycled coarse aggregate, water and the modified supported microbe ceramsite. When tiny damage is generated in the concrete, metabolism can be carried out through microorganisms attached to the recycled aggregate, then calcium carbonate is generated for damage repair, and when the concrete is greatly damaged, the modified microorganism-loaded ceramsite is damaged, and the microorganisms loaded in the ceramsite play a role to repair the concrete damage. Therefore, full-stage self-repairing of concrete damage is realized. Meanwhile, the materials adopt high-alumina fly ash, slag and recycled aggregate, so that the comprehensive utilization rate of industrial solid wastes and building solid wastes can be increased, and the environmental problems caused by the industrial solid wastes and the building solid wastes are relieved.

The application provides a preparation method of a zeolite adsorbent, comprising the following steps: a) treating a zeolite in an oxalic acid solution, and drying to obtain a zeolite precursor; b) treating the zeolite precursor obtained in the step a) in an ammonium fluoride solution, and drying to obtain a zeolite adsorbent. The application also provides a zeolite adsorbent and an ammonia adsorption method. The preparation method provided by the application is mild and controllable in structure adjustment, and the zeolite is post-treated to make the zeolite framework selectively rearrange or slightly adjust in local areas, so that mesoporous channels with appropriate sizes and good connectivity are generated. The preparation method provided by the application can introduce mesopores while maintaining the integrity of the microporous framework structure as much as possible, avoids damage to the micropores or collapse of the framework, and has the characteristics of simple process route, wide range of control parameters, good repeatability and suitability for large-scale preparation.

The invention discloses a nitrate-containing waste liquid treatment method, which comprises: (1) waste acid treatment: diluting waste acid in a neutralization reaction kettle, adding ammonia water while stirring, controlling the temperature to be 70-95 DEG C, continuously adding ammonia water to adjust the pH value of the solution to be 7.5-10.0 after the neutralization is completed, and carrying out stirring distillation to obtain an ammonium sulfate nitrate aqueous solution or an ammonium sulfate nitrate crystal; (2) wastewater treatment: 1) wastewater steam stripping: transferring nitrate wastewater into a steam stripping kettle, adding a pH regulator to regulate the pH value to be 10-13, heating the steam stripping kettle to a boiling state by using steam, distilling, condensing and recovering nitrate in the wastewater; and 2) oxidation treatment: after steam stripping is finished, hydrogen peroxide is added into the steam stripping kettle in a boiling state, stirring reaction is performed, and the reacted wastewater can be discharged after reaching the standard. Compared with a traditional Fenton method and an activated carbon adsorption method, the method has the advantages that secondary pollutants Fe (OH) 3 generated by treatment and saturated activated carbon after adsorption can be avoided, harsh reaction conditions such as light, electricity and microwaves can be avoided, the operation cost is reduced, the method is safe, environment-friendly and free of secondary pollution, the nitrate removal rate can reach 100%, and the method is suitable for industrial production. The COD (Chemical Oxygen Demand) of the treated wastewater is less than 100mg / L, and the wastewater can reach the direct discharge standard.

The application belongs to the technical field of solid waste resource utilization, and specifically discloses a method and device for preparing silicon-calcium aggregate, sulfuric acid and CO2 by phosphogypsum oxygen-rich high-temperature decomposition. The method uses the adsorption method to obtain pure nitrogen products and oxygen-rich combustion-supporting gas, and provides different reaction temperatures and reaction atmospheres for different reaction stages of the rotary kiln reactor through the multi-point combustion mode, thereby ensuring the controllable high-temperature environment and atmosphere in the kiln. The method improves the combustion efficiency, greatly reduces the amount of flue gas after decomposition, effectively improves the concentration of SO2 in the flue gas and the efficiency of the subsequent sulfuric acid preparation system, and realizes CO2 emission reduction and resource utilization by using the CO2-rich tail gas of the sulfuric acid preparation system for adsorption recovery. The application also provides a device for realizing the method, which combines gas adsorption, oxygen-rich combustion and rotary kiln multi-point combustion equipment, thereby ensuring the effective realization of the process.