187results about How to "Strong physical adsorption capacity" patented technology

A sound absorption structure body has a housing has a front side and a side face raised at at least a part of an outer edge section of the front face, a gas adsorption body placed in the internal space, surrounded by the front face and the side face, of the housing and physically adsorbing gas in the internal space, a sealing means for sealing the gas adsorption body from the outside, and an acoustic connection section provided at at least either the front face or the side face and functioning as an acoustic mass for acoustically connecting the internal space of the housing and the space outside the housing. The sound absorption structure body achieves both sound absorption in a low -pitched sound range and downsizing of the sound absorption structure body itself.

The invention discloses a carbon nanosphere / sulfur composite and a preparation method and application thereof. The carbon nanosphere / sulfur composite comprises a carbon nanosphere and elemental sulfur; the carbon nanosphere is composed of petal-shaped carbon plates which are combined into a sphere shape, gaps exist between the carbon plates, and the carbon plates are arranged in a wrinkled form and provided with through holes; the elemental sulfur and the carbon nanosphere are combined through a fusion permeation method to form the carbon nanosphere / sulfur composite, wherein sulfur accounts for 75-84 wt% of the composite. The gaps and through holes in the carbon nanosphere facilitate fusion loading of sulfur and dispersion and transportation of electrolyte ions, and the carbon nanosphere with a large specific surface area can load more sulfur active substances and effectively inhibit dissolution of polysulfide; the nitrogen element is doped on the carbon nanosphere to improve the electroactivity of a carbon material and enhance physisorption on sulfur; the carbon nanosphere / sulfur composite can serve as a positive electrode of a lithium-sulfur battery to improve the capacity, rate capability, cycling stability and coulombic efficiency of the lithium-sulfur battery.

The invention discloses a preparation method of functionalized tobacco shred bundles for a filter stick and application of the preparation method. The preparation method of the functionalized tobacco shred bundles includes the steps of dissolving polymer raw materials in a solution to prepare a spinning solution, and placing the spinning solution into a solution storage device; adjusting an electrostatic spinning voltage, continuously supplying the spinning solution in the solution storage device to a shred spraying nozzle connected with the solution storage device through a micro-pump; spraying the spinning solution on surfaces of continuously-moving tobacco shred bundles through the shred spraying nozzle to form nanometer fiber membranes, thereby obtaining the functionalized tobacco shred bundles. The preparation method is simple, continuous industrial production can be achieved, and the prepared functionalized shred bundles are used for preparing the cigarette filter stick which effectively reduces the releasing amount of tar, nitrosamine and HCN in cigarette main stream smoke and does not influence the cigarette smoking quality.

The invention discloses a preparation method of nanoscale temperature-controlled slow-release fragrant microcapsules. The nanoscale temperature-controlled slow-release aromatic microcapsules are prepared with the method comprising steps as follows: a co-melt is formed from a phase change material as a carrier and perfume and is taken as a core material, a polymer is taken as a wall material, and mixing, emulsifying and emulsion polymerization processes are performed. The nanoscale temperature-controlled slow-release fragrant microcapsules have two slow-release mechanisms: firstly, the phase change material is used as the carrier to realize temperature-controlled slow release; secondly, the dense polymer wall material is used. The product is environmentally friendly, non-toxic, high in mechanical strength and good in heat resistance, and can be used for fragrance enhancement and retaining of textiles, daily necessities and buildings.

The invention relates to methods for preparing and applying a titanium dioxide-carbon composite photocatalyst. The technical scheme is that the method for preparing the titanium dioxide-carbon composite photocatalyst comprises the following steps of: preparing an ordered macroporous-mesoporous carbon material and TiO2 sol respectively, soaking the aged TiO2 sol on the prepared macroporous-mesoporous carbon material by an impregnation method, drying, raising the temperature and calcicining to obtain a TiO2 / C composite photocatalyst material. The method for applying the titanium dioxide-carbon composite photocatalyst is that photocatalytic reaction conditions are that: the adding amount of the titanium dioxide-carbon composite photocatalyst is 1 to 6g / L; a light source is an ultraviolet or visible light source and directly irradiates a solution, the depth of the solution is 0.4 to 0.6cm, and the exposure dose per unit area on the surface of the solution is 12.5 to 12.8mW / cm<2>; and the temperature of a solution system is kept at 20 to 40 DEG C, and air is continuously introduced to maintain the concentration of dissolved oxygen. Macroporous-mesoporous carbon material supported titanium dioxide is used as a photocatalyst, so that TiO2 has high dispersity and photocatalytic activity, and is easier to recycle.

The invention relates to an oxide-modified flexible composite sulfur positive electrode material and a preparation method thereof, belonging to the field of lithium-sulfur batteries. The material comprises a nanocarbon material, a metallic oxide and active material sulfur, wherein the nanocarbon material serves as a skeleton of a flexible positive electrode material; a mass ratio of the nanocarbonmaterial to the metallic oxide to the active material sulfur is 1:(0.01-5):(0.05-10); and sulfur in the flexible positive electrode material is uniformly dispersed in a pore channel of the metallic oxide modified nanocarbon material skeleton. The nanocarbon material on the surface of which oxides are uniformly compounded serves as the skeleton of the flexible positive electrode material, the sulfur serves as the active positive electrode material, and an oxide / nanocarbon material / sulfur composite material which can be used for the lithium-sulfur battery positive electrode material is compounded. The composite positive electrode material prepared by the invention has high conductivity and excellent flexibility and achieves an inhibiting effect on a shuttle effect of polysulfides, and the specific capacity, cycling stability, rate capability, coulombic efficiency and other electrochemical performances of the lithium-sulfur battery positive electrode are improved.

The present invention relates to the technical field of nanometer selenium hydrosols, particularly to a nanometer selenium hydrosol having antitumor activity, a preparation method, a preservation method and applications thereof, wherein the hydrosol at least contains nanometer selenium with a concentration of 0.5-5.0 mmol / L, and Coriolus versicolor polysaccharide protein with a concentration of 100.0-600.0 mg / L. The preparation method at least comprises: S01, adding a solution containing selenium ions and / or selenous ions to a Coriolus versicolor polysaccharide protein aqueous solution; S02, adding a reducing agent solution to the mixed solution obtained in the step S01 in a dropwise manner, and shaking; and S03, carrying out volume metering on the product obtained after the reducing reaction, and carrying out dialysis treatment. According to the present invention, the hydrosol is stable at a temperature of 2-10 DEG C; and the Coriolus versicolor polysaccharide protein has the hydrophilic hydroxyl and the hydrophilic amino, and the two groups can enhance the affinity between the nanometer selenium and the cancer cells, and can improve the uptake on the nanometer selenium by tumor cells so as to achieve the whole treatment effect of medication dosage reducing, treatment effect improving and less toxic-side effect, such that the effective scheme is provided for the combination chemotherapy of cancers in the clinic.

The invention discloses a synthetic method of a spherical nitrogen-enriched micro-reticular resin for CO2 adsorption, characterized by: mainly using amines and aldehydes as raw materials, carrying out one-step method to synthesize a spherical adsorption material under the conditions of a temperature of 120-300 DEG C and a pressure of 0.1-3 MPa, under the effect of a surfactant, wherein, the spherical adsorption material has a specific surface area of 1500 m<2> / g, a sphere diameter of 0.8-2 mm, and a saturation adsorption capacity of CO2 being 4 mmol / g. The resin has the advantages of easy synthetic method, high adsorption capacity of CO2, good adsorption selectivity, and good spherical structure, and has great significance for promoting the development of CO2 adsorption and gathering technology.

The invention provides a formaldehyde adsorbing decomposing agent which is prepared by the following specific steps of: mixing 180-200 parts by weight of activated carbon powder with 10-30 parts by weight of zeolite molecular sieve powder uniformly, adding 25-40 parts by weight of potassium hydroxide water solution with mass fraction of 5-10% to the mixture and drying the mixture after uniformly stirring; and adding 2-8 parts by weight of microcrystalline cellulose to the dried mixture, then adding 9-20 parts by weight of potassium permanganate powder and mixing the materials uniformly, thus obtaining the formaldehyde adsorbing decomposing agent. The decomposing agent utilizes various mechanisms which adsorb and decompose formaldehyde, is thorough in adsorption, has good decomposition effects and has the advantages of simple preparation method and low cost.

The invention discloses a preparation system of car urea. The preparation system comprises a raw water tank (1), a raw water pump (2), a gravel filter system (3), an active carbon filter system (4), an ion exchange softening device (5), a pressurizing pump (6), a micro filter device (7), an ultra-filtration device (8), a middle water tank (9), a high pressure pump (10), a primary reverse osmosis device (11), a secondary reverse osmosis device (12), an EDI (electronic data interchange) system (13), an urea water barrel (14), a material storage tank (15), a primary filter system (16), a homogenization system (17), a discoloring system (18), a purifying system (19) and a filling device (20) which are connected in sequence by a pipeline. The system is reasonable in structural design, wide in range of application, good in equipment mating performance, high in automation degree, high in operability, small in floor area, capable of removing various ions in water, capable of reaching a salt removing rate of over 99.5%, stable in operation and high in utilization rate.

The invention provides an efficient standard solution production purification system for vehicle urea. The system comprises a gravel filtering system (1), an activated carbon filtering system (2), a pressure pump (3), a micro-filtering device (4), an ultra-filtering device (5), a middle water tank (6), a high-pressure pump (7), a primary reverse osmosis device (8), a secondary reverse osmosis device (9) and an EDI system (10). The efficient standard solution production purification system for the vehicle urea can be used for replacing a crystallization method adopted in traditional urea purification, electric energy can be saved, discharging of waste liquid in the crystallization process can be reduced, the efficient urea standard solution production purification system is a new breakthrough in the technical field of the urea for the vehicle, the content of the impurities of the urea for the vehicle can be controlled below 10-20 ppm, the conversion rate of oxynitride can reach up to 95 percent, the requirement for the diesel vehicle exhaust emission standard of the national level 4 and the national level V can be completely met, and important economic value and social value are achieved.

The invention discloses a method for preparing a porous ceramic material for adsorbing heavy metals. The method comprises the following steps: (1) preparing pug; (2) preparing a phosphorous compound solution: dissolving 20-40 parts (by weight) of phosphorous compound in 30-60 parts (by weight) of water so as to obtain the phosphorous compound solution; (3) carrying out milling: adding the phosphorous compound solution prepared in the step (2) into the pug prepared in the step (1), and carrying out milling for 20 to 30 minutes by using a mixing mill; (4) carrying out ceramic green body forming; (5) carrying out ceramic green body drying; and (6) carrying out ceramic green body burning. The porous ceramic material for adsorbing the heavy metals, prepared by the method, has the advantages of porosity, high specific area, high mechanical strength, high physical adsorptivity, high chemical adsorptivity and wide chemical adsorption adaptability.

The invention provides a filter aid which comprises coal ash or furnace slag. The coal ash or furnace slag is pretreated, wherein the pretreatment comprises the following steps: performing pickling or alkaline washing on the coal ash or furnace slag, and controlling the acid-base mass percent to be 0.1-0.8 percent; or adding lime, and controlling the lime addition amount to be 0.1-0.5 percent of the weight of the coal ash or furnace slag; or adding salt or base, wherein the addition amount of the salt or base is 0.05-1 percent of the mass of the coal ash or furnace slag; or adding the salt, wherein the addition amount of the salt is 1-10 percent of the mass of the coal ash or furnace slag; and stewing the coal ash or furnace slag in which the salt is added at the temperature of 90-200 DEG C for 1-5 hours under sealing conditions, wherein the salt is heated to generate gas. The filter aid disclosed by the invention takes the coal ash and the furnace slag as raw materials and can be widely applied to the industries of coloring, sugaring, beer, chemical industry and the like.

The invention discloses a composite fiber material used in a mixed asphalt material. The composite fiber material is prepared by mixing and uniformly stirring the following raw materials in percentage by weight: 48-53% of cellulose fiber, 30-34% of basalt fiber and 16-20% of sepiolite fiber. The composite fiber material disclosed by the invention is prepared by mixing and uniformly stirring three different fiber materials according to a ratio, the improvement effect on pavement properties of single fiber materials in the mixed asphalt material can be carried into the composite fiber materials, the composite fiber material which can comprehensively improve the pavement property of the mixed asphalt material is developed, and compared with the mixed asphalt material which is modified by using single fiber, the composite fiber material is capable of comprehensively improving various pavement properties of a road asphalt surface layer, and is high in cost performance.

The invention discloses a preparation method of wintersweet longjing tea. The preparation method of the wintersweet longjing tea comprises the following steps: preparing a tea base, blending flavor, scenting, finally scenting, embedding fragrance and re-firing the wet base. According to the preparation method of the wintersweet longjing tea, the longjing tea base is instantly puffed under high pressure to break the wall of the tea base, so that the defect of low adsorption capability caused by a compact structure of pan-fired green tea is overcome, and the physical adsorption capability of efficiently adsorbing wintersweet flower fragrance of the longjing tea base is improved; chloranthus flowers are used as a base by two different manners, the lasting rich fragrance of the chloranthus flowers cooperates and coordinates with the rich fragrance of castanea mollissima fruits in the pan-fired green tea, and thus the fresh and elegant properties of the wintersweet fragrance are well foiled; water of wintersweet flowers is well evaporated while the fragrance is retained to a greatest extent, and the fragrance freshness of the scented tea is improved.

The invention discloses a slow-release repairing material for organochlorine pesticide contaminated farmland soil. A preparation method of the slow-release repairing material comprises the following steps: preparing a biochar carrier; pretreating zero-valence iron powder; and preparing the slow-release repairing material. The slow-release repairing material comprises, by mass, 15-30% of the biochar, 10-20% of an organic carbon source, 5-10% of zero-valence iron, 5-10% of illite and 25-50% of guar gum. The organic carbon source can promote the activity of degrading bacteria as a growth matrix,and the biochar has a strong physical adsorption effect on organochlorine pesticides and provides inorganic nutrient minerals for soil; above effective components are organically combined by an embedding agent to realize the physical-chemical-biological synergistic enhanced repairing of the organochlorine pesticide contaminated farmland soil, so the pollutant removing effect is good, the treatmentlong-acting property of the organochlorine pesticides by the repairing material is improved, and fly-away loss caused by direct application of a powdery raw material is reduced. The slow-release repairing material for organochlorine pesticide contaminated farmland soil is suitable for repairing farmland soil contaminated with low-concentration organochlorine pesticides, and has a very broad application prospect.

The invention discloses a method for preparing a compound water purifying agent for emergency treatment of water pollution of a drinking water source, which comprises the following steps of: grinding concave soil raw ore into fine powder, and sieving by using a sieve with 100 to 300 meshes to obtain concave soil powder; calcining the concave soil powder at the temperature of between 350 and 500 DEG C for 1 to 5 hours, or radiating the concave soil powder by using microwaves with the power of 300 to 600W for 5 to 15 minutes to obtain modified concave soil; and mixing the modified concave soil and an inorganic polymer coagulant accounting for 5 to10 weight percent of the modified concave soil and potassium permanganate accounting for 1 to 5 weight percent of the modified concave soil in aqueous solution, stirring for uniform dispersion, drying, and grinding to obtain the water purifying agent finished product. The compound water purifying agent can obviously reduce the content of organic matters, algae toxins, heavy metals and the like in the water of the polluted drinking water source, the manufacturing cost is low, the operating process is simple, the sedimentation velocity is high, the sludge volume is small, the residues of inorganic reagents are a few, and the compound water purifying agent has chemical and biological safety and is a novel environment-friendly and high-efficiency water purifying agent for emergency treatment of the water pollution of the drinking water source.

The invention discloses a soil activating agent and a preparation method thereof. The soil activating agent is prepared from 8-12 parts of modified zeolite powder, 30-50 parts of biogas residues, 20-30 parts of straw powder, 10-15 parts of rice bran, 5-10 parts of rape seed cakes, 3-8 parts of humic acid mineral powder, 2-6 parts of swelling vermiculite powder, 1-5 parts of shell powder, 2-4 partsof gypsum powder, 0.5-1.5 parts of kieselguhr, 0.4-0.8 part of carboxymethyl chitosan, 0.3-0.7 part of leavening agent, 0.2-0.6 part of microelement additive and 3-7 parts of organic fertilizer. Theprovided soil activating agent can effectively improve soil structure, activate edaphon, enhance soil fertility, improve the soil capacity of preserving moisture and fertility, facilitate forming of soil aggregates, and be long in lasting time of preserving moisture and fertility and aggregating capacity, simple in preparation, low in cost, easy to operate, green and environmentally friendly.

The invention discloses a preparation method of sludge-based activated charcoal, and further discloses application and an application method of the sludge-based activated charcoal. The invention particularly relates to a method which can be used for realizing zero emission and resource recovery of sludge produced by urban sewage plants, preparing a low-cost and efficient sludge-based activated charcoal material and recycling sludge to be reused by membrane bioreactors for strengthening urban sewage treatment performance and membrane fouling control. According to the method, organic substances contained in sludge produced by the membrane bioreactor technology from urban sewage plants are fully utilized, and a certain chemical means is adopted for preparing an adsorbent material with a porous structure from excess sludge; at the same time, the adsorbent material prepared from the sludge can be added to membrane bioreactors for strengthening the decontamination performance and retarding membrane fouling, so that the both the purpose of waste resource utilization and the purpose of dealing with waste by waste are achieved, a far-reaching influence on urban sewage treatment and sludge disposal technology and a quite high utility value are achieved.

The invention discloses a method for preparing and using an electrochemical immunosensor for aflatoxin B1 detection, including preparation of an electrochemical immunosensors and alflatoxin B1 detection of the electrochemical immunosensor. According to the preparation scheme, the preparation method comprises the following steps: preparing a nano-gold solution; preparing an activated glassy carbonelectrode; preparing a graphene oxide / thionine / nano-gold compound material; preparing a modified glassy carbon electrode; sealing the non-specific site with bovine serum albumin; and preparing a detection substrate. The method realizes quick, accurate and low-cost detection on aflatoxin B1.

The present invention relates to an adsorbent including a hierarchically porous silica monolith, and particularly, to an adsorbent for adsorbing or separating carbon dioxide in air or heavy metals in an aqueous solution, in which an amino group is covalently bonded to the silica monolith. Further, the present invention relates to a method for preparing the adsorbent including a hierarchically porous silica monolith, and particularly, to a method for preparing an adsorbent for adsorbing or separating carbon dioxide in air or heavy metals in an aqueous solution, in which an amino group is covalently bonded to the silica monolith.

The invention relates to a method of preparing porous phosphor absorbing ceramic particle from sludge in water supply plant. The preparation method comprises four phases: raw material preprocessing, balling, sintering, and cooling. The preparation method specifically comprises the following steps: picking raw material balls with a particle size of 6 to 8 mm, drying the raw material balls at a temperature of 105 DEG C for two hours, preheating the raw material balls at a temperature of 300 to 400 DEG C for 20 to 30 minutes, burning the raw material balls at a temperature of 1150 DEG C for 8 to 10 minutes, and cooling to obtain the finished product of ceramic particles. Through controlling the material ratio, rotation speed of granulator, the spraying mode of adhesive, burning time, and burning temperature, ceramic particles with a large specific surface area and strong phosphor absorbing performance can be obtained. The ceramic particles can be used as the filling material of a sewage processing system, and the sludge in a water supply plant is converted into valuable resource.

The invention provides a preparation method of a flue gas adsorbent by taking modified coal ash as a main raw material. The coal ash is subjected to supercritical water treatment, and soluble substances in partial coal ash micro particles are dissolved, so that the micropores in the coal ash are expanded and improved; sulfuric vapor treatment is carried out, so that elemental sulfur in particle surfaces of the coal ash and partial micropore ducts can be pre-adsorbed, and sulfur can react with Hg<2+> and Hg<0> in the gas phase to generate mercuric sulfide, so that the adsorption capacity of an adsorbent is reinforced, and other additives are added so as to further improve the performance of the adsorbent. The adsorbent provided by the invention has good adsorption performance and regeneration capacity.

The invention discloses a tire pyrolysis carbon black modification method. The modification method comprises the following steps: a, mixing tire pyrolysis carbon black powder with a dispersing agent to obtain carbon black ore pulp; b, mixing the carbon black ore pulp with hydrogen peroxide, and carrying out aging modification; c, carrying out dehydration treatment on the aged modified product to obtain dehydrated solids; and d, carrying out microwave heating on the dehydrated solids under inert gas purging. The invention also discloses the modified pyrolysis carbon black obtained by the tire pyrolysis carbon black modification method. The invention also discloses a tire comprising the modified cracked carbon black.

The invention discloses a high-embedding essence microcapsule and a preparation method thereof. The preparation method comprises the steps that maltodextrin and porous starch are mixed; distilled water is added, stirring and mixing are carried out to prepare a mixed solution, a crosslinking agent is added, the pH value of the mixed solution is adjusted to 9-11, stirring is carried out at 30-60 DEGC, the reaction time is 4-24 hours, the pH value of the mixed solution is adjusted to 7-8, and washing, drying, smashing and sieving are carried out to obtain an essence wall material; essence is added into a wall material solution, homogenization is carried out, a uniform emulsion solution is formed, spray drying is carried out, and the essence microcapsule is prepared. The high-embedding essence microcapsule and the preparation method thereof have the advantages that the product is green and environmentally friendly, the cost is low, the essence embedding rate of the microcapsule after adsorption is higher than 85%, and the peroxide value after 12 days of oxidation at 60 DEG C is lower than 0.15-100 grams. The essence embedding method can increase the embedding rate of essence, delay the oxidation of the essence, and is conductive to the storage, transport, application and popularization of the essence.

The invention provides a two-dimensional covalent organic framework modified flexible fiber fabric and a preparation method thereof, and belongs to the field of fabrics. The modified flexible fiber fabric prepared by the method can be used for antifriction processing between the inner and outer spherical surfaces of a large self-lubricating rod end joint bearing, and the solid / oil composite lubrication effect is effectively achieved. On the premise that the flexibility and deformability of the PTFE composite fiber fabric is not lost, the surface friction coefficient of the PTFE composite fiberfabric and the swing friction torque between the inner and outer spherical surfaces of the rod end joint bearing are further reduced.

The invention discloses a polyvinylidene fluoride / attapulgite hybrid separation membrane with good adsorption function to heavy metal ions and anti-pollution performance to protein and microorganisms in a water body, and a preparation method thereof, belonging to the technical field of functional polymeric membranes. The heavy-metal-ion adsorption type anti-pollution hybrid flat-sheet separation membrane is prepared by constructing a zwitter-ion MPDSAH gel layer on the surface of a membrane through grafting and crosslinking with a PVDF / attapulgite hybrid membrane as a base membrane, wherein the membrane is best in performances when a mass ratio of PVDF and modified attapulgite in the base membrane is 1: 0.3, the mass of the base membrane is 1.08945 g, the usage amount of a surface grafting monomer MPDSAH is 7.0 g, the content of a crosslinking agent MBAA accounts for 0.6% of the total content of the monomer, the usage amount of an initiator is 0.078 g, membrane alkali treatment time is 20 min, and a reaction temperature is 60 DEG C. The preparation method for the heavy-metal-ion adsorption type anti-pollution hybrid flat-sheet separation membrane provided by the invention has the advantages of no need of special equipment, easy industrial implementation, simple process and low membrane cost.

The invention relates to a water adsorption material, particularly relates to an acid heat treatment attapulgite water quality purifying agent. Attapulgite has a special fibrous structure, unusual colloid and adsorption performance, is wide in application field and has good reputation of earth king. The attapulgite clay has a special chained crystal structure, good colloid properties such as unique dispersion, water absorption and salt and alkali resistance and relatively high adsorption decoloring capacity and has good plasticity and adhesion performance, thereby being widely applied in various industries such as petroleum, chemical industry, building materials, papermaking, medicine, agriculture, environmental protection, printing and articles for daily use. Since the attapulgite crystal fibers are slender, internally porous, large in specific surface area and good in selection adsorption performance, the attapulgite is widely applied to the fields such as chemical industry, agriculture, food, medicine and environmental protection. At present, the attapulgite is widely used for the sewage treatment and particularly used for treating the waste water in printing and dyeing mills and tanneries, and the treated sewage can reach the national emission standard.

The invention provides a red mud-added ecological concrete which comprises a cementing material, aggregate, water and a naphthalene-based superplasticizer, wherein the cementing material includes red mud and slag portland cement. According to the invention, through application of the red mud in ecological concrete, a pollutant purifying effect of the ecological concrete can be improved, the waste is turned into the valuable at the same time, and the red mud can be used to replace cementing materials like cement; thus, production cost of the ecological concrete is substantially reduced, and the ecological concrete has good strength and considerable practical application values.

The invention relates to a preparation method of a chitosan -beta-cyclodextrin adsorbent. The chitosan-beta-cyclodextrin adsorbent comprises the following raw materials: acetic acid, chitosan, beta-cyclodextrin, glutaraldehyde, and deionized water. The preparation method comprises the following steps: firstly, uniformly mixing chitosan and beta-cyclodextrin in an acetic acid solution with a certain concentration, then adding a cross-linking agent to prepare a chitosan-beta-cyclodextrin composite material, and then forming pores in the composite material through a freeze-induced drying method.The three chitosan-beta-cyclodextrin adsorbents with different addition ratios are prepared.