54results about How to "Fast adsorption rate" patented technology

The invention belongs to the technical field of water treatment, and particularly relates to an iron-carbon composite material, a preparation method of the iron-carbon composite material and application of the iron-carbon composite material to synchronous removal of perfluoro and polyfluoroalkyl compounds. According to the iron-carbon composite material provided by the invention, the iron metal element is anchored on the carbon carrier material in a nanocluster form, so that the problem of new pollution caused by iron dissolution is avoided, and the iron-carbon composite material is high in adsorption rate, large in adsorption capacity, recyclable and good in long-term stability. According to the invention, the PFAS is captured through hydrophobic interaction and electrostatic attraction by utilizing the coding characteristics, excellent adsorption performance is shown in treatment of various pollutants, rapid, efficient and synchronous removal of the PFAS is realized, and meanwhile, the high utilization rate of the iron-carbon composite material is ensured. As an adsorbent, the iron-carbon composite material provided by the invention is particularly suitable for repairing a perfluorooctanoic acid and / or perfluorooctane sulfonic acid combined polluted water body, the repairing is efficient, the cost is low, the removal condition of pollutants can be accurately judged, and the iron-carbon composite material is suitable for underground water or surface water.

The invention discloses a preparation method of a rapid adsorption conductive lithium ion sieve membrane, and relates to the field of preparation of lithium ion sieve membranes. The invention aims to solve the problems that the traditional lithium ion sieve is too slow in adsorption rate, easy to dissolve and damage in the regeneration process and incapable of meeting industrial requirements. According to the invention, SP-PDA-coated PVDF is used as a base membrane to prepare a PTH-coated HMO conductive polymer, and the PTH-coated HMO conductive polymer is applied to an ESIX process to develop a conductive lithium ion sieve membrane which is good in conductivity, low in manganese dissolution loss and capable of rapidly adsorbing. The method comprises the following steps: 1, preparing an SP-PDA coated PVDF membrane; 2, preparing a PTH-HMO conductive polymer; and 3, preparing the PTH-HMO-SP-PDA-PVDF conductive polymer. The prepared rapid adsorption conductive lithium ion sieve membrane has longer service life, and the replacement frequency and the maintenance cost are reduced. According to the invention, the rapid adsorption conductive lithium ion sieve membrane can be obtained.

The invention relates to the technical field of adsorbent preparation, in particular to an imidazolium salt polymer adsorbent as well as a preparation method and application thereof. The preparation method of the imidazolium salt polymer adsorbent comprises the following steps: mixing a polybromophenyl organic compound, imidazole, alkali and a catalyst, and carrying out nucleophilic substitution reaction under the action of the catalyst and the alkali to obtain a triimidazolyl organic monomer; the preparation method comprises the following steps: dissolving a triimidazolyl organic monomer and 1, 4-di (bromomethyl) benzene in an organic solvent, and carrying out quaternization reaction to obtain the imidazolium salt polymer adsorbent. The imidazolium salt polymer adsorbent prepared by the method disclosed by the invention not only can accurately identify and adsorb Cr2O7 < 2-> and remarkably improve the removal efficiency of Cr2O7 < 2->, but also can keep an efficient working state in a wide pH value range. Meanwhile, the material can be easily separated from wastewater and can be repeatedly used after being subjected to simple regeneration treatment, so that cyclic utilization of resources is realized.

The invention belongs to the field of gas technical purification, and particularly relates to a honeycomb-shaped high-concentration NO2 adsorption trapping material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing adsorbent slurry by taking high-silicon molecular sieve raw powder as a raw material; (2) putting a honeycomb carrier into the adsorbent slurry for dipping and coating; and (3) naturally airing, drying and roasting the impregnated carrier to obtain the integral honeycomb-shaped high-concentration NO2 adsorbing and trapping material. On the basis of the honeycomb-shaped high-concentration NO2 adsorption trapping material (the molecular sieve silica-alumina ratio is 1000-5000), NO2 is efficiently trapped through a pressure swing adsorption technology, meanwhile, the adsorbent subjected to adsorption saturation is reversibly regenerated, high-concentration NO2 desorbed gas is obtained, NO2 recycling is achieved, NOx tail gas of a nuclear industry post-treatment plant is recycled, and the purpose of recycling the NOx tail gas of the nuclear industry post-treatment plant is achieved. A stable NO2 gas source is provided for a spent fuel post-treatment main process, the dual requirements of NO2 raw material preparation and tail gas denitration of a post-treatment plant are met, and purification and recycling of NO2 are achieved.

The present invention belongs to the field of lithium extraction, and specifically relates to a H 1.6 Mn 1.6 O4@H2TiO3 composite lithium ion sieve, comprising H 1.6 Mn 1.6 O4 with a porous structure, and H2TiO3 embedded in the pore structure and surface-coated in H 1.6 Mn 1.6 O4. The present invention also includes the preparation of the material and its application in lithium extraction. The material described in the present invention has excellent lithium extraction capacity and cycle stability.

This invention belongs to the field of wet electronic chemicals technology, specifically relating to a method for preparing electronic-grade hydrogen peroxide. The method includes the following steps: adjusting the concentration of raw hydrogen peroxide, and then filtering it sequentially through a reverse osmosis membrane, a modified cation exchange resin, an anion exchange resin, and a mixed ion exchange resin to obtain electronic-grade hydrogen peroxide. The modified cation exchange resin used is modified based on conventional cation exchange resin through pore expansion and grafting, optimizing the spatial matching of pore structure and functional sites. This achieves passivation of metal ions, enhanced adsorption capacity, and improved oxidation resistance, as well as a deep synergistic effect of these three effects. Ultimately, it achieves the dual goals of efficient purification and stable operation of the resin in the hydrogen peroxide system. The resulting electronic-grade hydrogen peroxide can reduce the content of single impurity metal ions to below 5 ppt, meeting the requirements of SEMI G5 standards, and can be directly applied to high-end manufacturing fields such as semiconductor wafer cleaning.

The invention relates to an iron ion silicon-based adsorbing material as well as a preparation method and application thereof. The iron ion silicon-based adsorption material is prepared by the following steps: S1, coupling vinyl silane to the surface of a silicon ball to obtain a modified silicon ball; and S2, copolymerizing the modified silicon balls with an acrylic monomer and a cross-linking agent to obtain the iron ion silicon-based adsorption material. The iron ion silicon-based adsorbing material disclosed by the invention has relatively high adsorption capacity and excellent adsorption selectivity on iron ions, the adsorption capacity of the iron ions is obviously improved, directional adsorption removal of iron impurities in a rare earth solution is realized, and a simple, convenient and efficient method is provided for removing trace iron ions in the rare earth solution.

The invention discloses a magnesium-doped calcium carbonate adsorbent and a preparation method and application thereof, the chemical formula of magnesium-doped calcium carbonate is as shown in the following formula (1): MgxCa1-x (CO3), x represents the molar ratio of magnesium to calcium, 0 lt; xlt; and 0.200%. Compared with pure calcium carbonate, the adsorption rate of the adsorbent based on the magnesium-doped calcium carbonate material provided by the invention is greatly improved, so that passivation of the pure calcium carbonate in the early stage of adsorption is relieved. Under the condition of the same phosphorus adsorption amount, the adsorption rate of the adsorbent is obviously improved. Alternatively, under the same adsorption time, the phosphorus adsorption amount of the adsorbent provided by the invention is obviously improved. The adsorbent provided by the invention has good adsorption selectivity (competitive ion interference resistance), so that the adsorbent has high practical application value. In addition, as the preparation is simple and convenient and the cost is low, the compound can be used as an agricultural fertilizer slow-release agent, can maintain the phosphorus content in farmland for a long time, and is more beneficial to the growth of crops.

The invention provides a preparation method of a granular manganese lithium ion adsorbent, and belongs to the technical field of lithium extraction adsorbents, the preparation method comprises the following steps: dissolving a lithium salt and a manganese salt in water together to obtain a lithium-manganese solution, and adding a carrier molecular sieve into the lithium-manganese solution to obtain a mixed solution; adding a precipitant and a complexing agent into the mixed solution, and stirring to react for a certain time to obtain a reaction solution; aging the reaction liquid, then carrying out solid-liquid separation, and drying the obtained precipitate to obtain a coprecipitation carrier; and carrying out high-temperature roasting on the coprecipitation carrier to obtain the manganese-based lithium ion adsorbent. The lithium ion adsorbent prepared by the method is granular and high in flowability, solves the problem of poor flowability of a powdery adsorbent in industrial application, and has excellent stability and adsorption capacity. The invention also provides the granular manganese lithium ion adsorbent.

The application discloses a method for preparing hierarchical porous graphene-like biochar by synchronous graphitization-activation and application thereof, and relates to the technical field of biochar material preparation, and comprises the following steps: performing pre-carbonization treatment on girl fruit shells to obtain pre-carbonized materials; mixing the pre-carbonized materials with potassium carbonate to obtain mixed materials; performing high-temperature synchronous graphitization-activation treatment on the mixed materials under an inert atmosphere to obtain a crude product; performing acid pickling and water washing on the crude product to obtain a neutral product; and performing drying on the neutral product to obtain hierarchical porous graphene-like biochar HGB-2-9. The HGB-2-9 prepared by the method has high adsorption capacity, a fast adsorption rate, wide pH adaptability (pH=3-10), good ion strength tolerance (0.01-0.5 M sodium chloride), excellent recyclability and high removal efficiency in actual water bodies, and provides a green way for converting waste biomass into high-efficiency adsorption materials.

The application discloses a coke oven gas deaminating agent and a preparation method thereof. The deaminating agent takes zinc and copper metal salts as active components, nickel and cobalt metal salts as auxiliary component, and takes magnesium aluminate spinel prepared from aluminum oxide and magnesium oxide as a carrier. The deaminating agent has the characteristics of high deaminating activity, high ammonia content penetration, and renewable utilization, is used for gas phase deamination, and is particularly suitable for a coke oven gas purification process, and can reduce the ammonia content to 0.1 ppm.

The invention provides a multifunctional nodular cast iron straight pipe special coating production line, and belongs to the technical field of waste gas treatment. Comprising a preheating device, a spraying device, a curing device and a waste gas treatment device, the preheating device is connected with the spraying device, the spraying device is connected with the curing device, the spraying device is connected with the waste gas treatment device, and the waste gas treatment device comprises supporting legs. By arranging the gear motor, the filter cylinder and the cylinder body, when the waste gas treatment device runs, the gear motor drives the filter cylinder to rotate, so that activated carbon is turned over, waste gas turbulence is promoted, the gas-solid relative speed is increased, the mass transfer process is enhanced, pollutants are more quickly diffused to the surface of the activated carbon to be adsorbed, the adsorption rate is increased, and the waste gas retention time is shortened; the activated carbon is fully overturned to be in contact with the waste gas, local premature saturation can be avoided, the adsorption capacity of the activated carbon is fully utilized, more waste gas can be treated under the condition of the same use amount of the activated carbon, and the operation economy and the waste gas treatment effect are improved.

The invention discloses a method for preparing a fluoride ion adsorbent: (1) ferric oxide, ferric disulfide and calcium chloride are uniformly mixed to obtain a mixture; wherein the mass ratio of ferric oxide, ferric disulfide and calcium chloride is (10-12): (1-2): (0.08-0.1); (2) the mixture is subjected to one-stage roasting in an atmosphere containing tin tetrafluoride gas to obtain a one-stage roasting slag; (3) the one-stage roasting slag is subjected to two-stage roasting in a water vapor atmosphere to obtain a two-stage roasting slag; (4) the two-stage roasting slag is water-soaked, filtered after the water-soaking is completed, and the fluoride ion adsorbent is obtained. The present invention selects ferric oxide, ferric disulfide and calcium chloride as raw materials, and combines the process control of two-stage roasting, and the adsorbent obtained by water-soaking finally has the characteristics of stable structure, large fluorine adsorption capacity, fast fluorine adsorption rate, etc., and the adsorbent can be separated from the solution without liquid-solid separation.

This invention belongs to the field of iodine adsorption material technology, and discloses a method for synthesizing and applying a highly efficient iodine adsorption material. The synthesis method includes: S1, adding an organic aldehyde ligand to a container, adding a solvent, and stirring to completely dissolve the aldehyde ligand; S2, slowly adding the above solution dropwise to an organic amine ligand solution to completely mix it with the amine ligand; S3, sealing the above mixed solution and stirring at room temperature until the color deepens; S4, after the reaction is complete, separating the reaction solution into small glass vials, tightening the caps, loosening them by half a turn, and placing them in a protective atmosphere; after several days of gas-liquid diffusion, visible crystals form at the bottom of the glass vials. The synthesized adsorption material has applications in volatile and radioactive iodine. The crystalline adsorption material synthesized by this invention has good stability, high adsorption efficiency for iodine, and a fast adsorption rate, and can be used for nuclear waste treatment and the capture of radioactive iodine.

The invention relates to a preparation method of Ag nanoparticle modified WO3 nanospheres for high-sensitivity detection of H2S gas. The preparation method comprises the following steps: 1) preparing a mixed solution; 2) preparing a precursor solution; 3) hydrothermal reaction; 4) centrifugal precipitation; and (5) preparing the Ag-WO3 nanospheres. According to the invention, a simple solvothermal and sodium borohydride (NaBH4) reduction method is adopted to synthesize the noble metal Ag nanoparticle (NPs) modified WO3 nanosphere gas sensor with controllable morphology and size. According to the AgNPs modified WO3 nanosphere disclosed by the invention, H2S gas can be detected at room temperature (25 DEG C), and the response value of the AgNPs modified WO3 nanosphere to 10ppm H2S gas reaches up to 2849 and is about 235 times that of pure WO3 (Ra / Rg is equal to 12.14); meanwhile, the sensor also has quick response capability (6s), low detection lower limit (10ppb), wide detection range (10ppb-40ppm) and excellent selectivity.

The invention relates to a method for preparing an attapulgite-activated carbon composite material from natural attapulgite, which specifically comprises the following steps: by taking the natural attapulgite as a raw material, adding a certain amount of acid, a suspending agent and water according to mass fraction, stirring at normal temperature, washing, drying and crushing to obtain purified attapulgite, and drying to obtain the attapulgite-activated carbon composite material. Then adsorbing coked stronger ammonia water by using purified attapulgite, filtering and drying the adsorbed attapulgite, and performing oxygen-isolated calcination in a tubular furnace to obtain the attapulgite-activated carbon composite material. Oil substances adsorbed on the surface of the attapulgite adsorbed with strong ammonia water are used as a carbon source of activated carbon and are converted into a mesoporous activated carbon material with adsorption capacity through a one-step calcination method, and meanwhile, the pore structure of the attapulgite is also dredged under the action of acid. According to the invention, the adsorption and oil removal of the coked stronger ammonia water by the attapulgite are realized, the adsorbed oil substances are further utilized to generate the activated carbon, the adsorption performance of the attapulgite and the activated carbon is fully utilized, and the obtained product has high adsorption capacity, good thermal stability and better application prospect.

The present invention discloses a preparation method of a layered α-zirconium phosphate (α-ZrP) doped composite gel material and its heavy metal ion adsorption application, which relates to the field of water pollution control. The purpose of the present invention is to solve the problems of low selectivity for copper ions, low adsorption capacity, poor mechanical strength, complex production process and high cost of existing copper ion hydrogel adsorbents. Method: (1) prepare a few layers or a single layer of α-ZrP powder filler; (2) add it to a gelatinized liquid of starch and sodium carboxymethyl cellulose (CMC); (3) add the mixed solution to a cross-linking solution for cross-linking; (4) crush it with a blender, soak it in ethanol, and vacuum dry it to obtain an α-ZrP doped composite gel material for use as a copper ion adsorbent, which has good mechanical strength and stability; for heavy metal copper ion adsorption, it has the characteristics of fast, high efficiency and high adsorption capacity.

The invention discloses a method for preparing a high-salt phosphate-functionalized silicide material for efficient uranium extraction with ultra-low feed amount, comprising mixing phytic acid, ethanol and water in a certain proportion, adding vinyl triethoxysilane, stirring evenly, heating and reacting, naturally cooling to room temperature, centrifuging to obtain a precipitate, washing, and vacuum drying to obtain a phosphate-functionalized silicide material. The process is simple and easy, the synthesis conditions are mild, and the phosphate-functionalized silicide material prepared by the method of the invention has a fast uranium adsorption rate and excellent salt resistance at an ultra-low feed amount of 0.06 g / L.

The invention discloses an adsorbent for aromatic hydrocarbon separation and a preparation method and application thereof. The adsorbent comprises the following components in parts by weight: 2.0 to 20.0 parts of nickel; 0.3 to 2.0 parts of rare earth metal; 72.0 to 97.1 parts of carrier aluminum oxide; the acid amount of the adsorbent is in ternary distribution of weak acid, medium strong acid and strong acid; wherein the ratio of the amount of the weak acid to the amount of the medium-strong acid to the amount of the strong acid is 100: (5-20): (15-35). The adsorbent is used for separating aromatic hydrocarbon in raw oil, can effectively separate the aromatic hydrocarbon in the raw oil, and has the remarkable advantages of high adsorption rate and large adsorption capacity.

A compound, a preparation method thereof and its application as an anti-elution deactivation lithium extraction adsorbent, relating to the field of lithium extraction from salt lakes. The molecular formula of the compound is LiCl m X n‑ (1‑m) / n ·aAl(OH)3·xH2O; X is the radius larger than Cl ‑ The preparation method is as follows: adding aluminum chloride and lithium chloride to deionized water and mixing them to obtain a first mixed solution; adding alkali and at least one anion salt to deionized water and mixing them to obtain a second mixed solution; the radius of the anion is greater than Cl ‑ radius and valence of ‑5 to ‑1; adding the first mixed solution dropwise to the second mixed solution for stirring reaction, aging, filtering, primary drying, washing with water to elute LiCl, and secondary drying. The compound has strong anti-elution inactivation ability, fast adsorption rate, large adsorption capacity, and high selectivity, and can be used as an adsorbent for lithium extraction from salt lakes.

The invention discloses a culture tail water treatment method for synchronously removing pollutants and antibiotics, and belongs to the technical field of culture tail water treatment. According to the invention, the regulating tank is used for carrying out precipitation pretreatment on the culture tail water, then the integrated anoxic-aerobic bio-membrane reactor is used for carrying out biological removal on organic matters, ammonia nitrogen and total nitrogen in the culture tail water, and then the adsorption and ozone coupling device is used for removing total phosphorus and antibiotics in the culture tail water. The effluent quality can meet the primary standard of a fresh water receiving area in Discharge Standard of Pond Culture Tail Water in Jiangsu Province (DB32 / 4043-2021), the up-to-standard discharge of the culture tail water is realized, and meanwhile, the antibiotic removal rate is greater than 90%. According to the treatment method, pollutants and antibiotics in the aquaculture tail water are synchronously removed, and the treatment method has a relatively good application prospect.

The utility model discloses a device for adsorbing organic pollutants by a biochar composite material, which comprises a filtering cabin, a water passing cabin is arranged on the upper half part of the outer side of the filtering cabin in a communicated manner, a water outlet is formed in the bottom of the filtering cabin, the device further comprises a top water inlet of the water passing cabin, and a detachably connected filtering plate is arranged in the water passing cabin; the stirring assembly is rotatably arranged in the filtering cabin through a bearing, and the stirring assembly is connected with the output end of the driving motor; the limiting components are distributed on the middle lower half part of the inner wall of the filtering cabin in a circumferential matrix manner; the adsorption assembly is detachably connected into the filtering cabin through a limiting assembly, and a window is formed in the outer wall, opposite to the adsorption assembly, of the filtering cabin. According to the device for adsorbing the organic pollutants through the biochar composite material, the problems that in the existing adsorption mode that a biochar rod is installed on a rotating rod, abrasion, crushing and the like are prone to occurring, and the operation and maintenance cost is greatly increased are solved.

This invention discloses an adsorption method and apparatus for refined base oil, relating to the field of base oil adsorption technology. The adsorption method proposed in this invention can solve the problem of poor color and short service life caused by the presence of small amounts of gums, asphaltenes, and residual carbon in base oil, without polluting the ecological environment. The adsorption apparatus proposed in this invention includes a reaction chamber; a rotating cylinder is rotatably installed inside the reaction chamber, with a threaded portion on the outer side of the cylinder. The cylinder has a hollow structure, and its interior is divided into two chambers for storing raw materials by a partition. A mixing rod is rotatably installed at the bottom of the cylinder, with its top end communicating with the two chambers. A filter element is vertically slidably installed inside the reaction chamber for quickly filtering precipitates. This adsorption apparatus can accelerate the removal of precipitated substances and improve adsorption efficiency.

The invention provides a porous aerogel adsorption material as well as a preparation method and application thereof, and belongs to the technical field of energy materials. The preparation method comprises the following steps: mixing and drying a water-soluble lithium salt and a titanium source to obtain a nanoscale mixed material, and roasting the nanoscale mixed material to obtain a titanium-based ion sieve precursor; the preparation method comprises the following steps: mixing a titanium-based ion sieve precursor with a binder to form slurry, cross-linking in a cross-linking agent solution to form hydrogel, and freeze-drying to obtain the porous aerogel adsorption material. The titanium-based ion sieve precursor is prepared through wet mixing, drying and roasting, and the problems that raw materials are large in grain size and uneven in mixing, and the titanium-based ion sieve is low in purity can be solved; the adsorption selectivity of carboxyl and lithium in the binder is improved through electrostatic attraction; the cross-linking agent can improve the adsorption rate and reduce the surface brittleness of the material.

The invention provides a deodorant and a deodorizing device for a refrigerator, and the deodorant comprises a fragrance slow-release base material which is composed of absorbent paper and card paper; the absorbent paper and the card paper are connected through an adhesive, the absorbent paper adsorbs the volatile essence, and the fragrance slow-release base material is arranged in the air hole plastic bag; the volatile essence is prepared from at least one of glyceryl triacetate, sweet orange extract, methyl jasmonate, grapefruit oil, alpha-hexylcinnamyl aldehyde, linalool and benzyl salicylate. According to the deodorant for the refrigerator provided by the invention, the used volatile essence is edible essence and meets food-grade requirements. The plastic bag with the small holes is used for packaging, on one hand, the fragrance release rate is controlled through the hole size, and meanwhile, essence is prevented from permeating into plastic in the refrigerator to cause pollution. The deodorant for the refrigerator is high in adsorption rate, not prone to saturation and capable of completely adsorbing peculiar smells in the refrigerator.

This invention proposes a fast-adsorption, hydration-product-resistant water-reducing agent and its preparation method, belonging to the field of concrete admixture preparation technology. This invention uses a polyether macromonomer, acrylic acid, long-branched functional monomer a, and long-branched functional monomer b to prepare a copolymer via free radical polymerization. Long-branched functional monomer a is modified allyl epoxy ether sodium phosphate with a weight-average molecular weight of 10,000-14,000 g / mol; its phosphate groups preferentially adsorb onto the surface of cement particles, and the long branching delays the covering of hydration products. Long-branched functional monomer b is a copolymer of hydroxyethyl acrylate, hydroxypropyl acrylate, and allyl mercaptoacetate with a weight-average molecular weight of 8,000-12,000 g / mol, providing a large number of ester groups, which hydrolyze under alkaline conditions to produce secondary dispersion. The water-reducing agent of this invention can be rapidly adsorbed, with no loss of slump within 2 hours and no significant increase, significantly improving the workability of concrete, reducing the dosage of water-reducing agent, and improving early and late strength. It is suitable for general-purpose silicate cement with high fineness and high admixture content.

The invention discloses a preparation method and application of a two-dimensional bismuth-based surface molecular imprinting photocatalyst. Template molecule venlafaxine and functional monomer 2-acrylamide-2-methylpropanesulfonic acid are dissolved in an ethanol solvent containing a carrier BiOCl, prepolymerization is performed at 20-40 DEG C for 2-8 h, and the two-dimensional bismuth-based surface molecular imprinting photocatalyst is obtained. Adding ethylene glycol dimethacrylate serving as a cross-linking agent and azodiisobutyronitrile serving as an initiator, performing thermal polymerization for 20-30 hours at the temperature of 50-70 DEG C after ultrasonic and nitrogen charging protection, and performing elution and drying to obtain the two-dimensional bismuth-based surface molecular imprinting photocatalyst. The imprinted photocatalyst prepared by the invention has strong capability of selectively adsorbing a target object venlafaxine in an aqueous solution, the venlafaxine is preferentially and rapidly degraded under an illumination condition, and the imprinted photocatalyst can be used for selective photocatalytic removal of the venlafaxine in an actual water sample.

The invention belongs to the field of molecular imprinting, and particularly relates to a preparation method and application of a rosinyl nitidine chloride molecularly imprinted polymer. The invention discloses a rosin-based nitidine chloride molecularly imprinted polymer which is prepared by taking nitidine chloride as a template molecule, methacrylic acid as a functional monomer, ethylene glycol dimethacrylate and maleated rosin ethylene glycol acrylate as cross-linking agents, azodiisobutyronitrile as an initiator and methanol as a solvent. The rosin-based nitidine chloride molecularly imprinted polymer is prepared by adopting a precipitation polymerization method. The adsorption effect of the template molecule and different functional monomers on the nitidine chloride is discussed, and the result shows that the adsorption effect of the template molecule and the functional monomers on the nitidine chloride is optimal when the ratio of the template molecule to the functional monomers is 1: 6, the MIP is 5.91 mg / g, and the NIP is 1.22 mg / g. The preparation method disclosed by the invention is simple in process, has good adsorption performance and separation capacity on nitidine chloride, and has good specificity on selective adsorption of nitidine chloride.

The invention provides a covalent organic framework material with hydrogen bond acting sites as well as a preparation method and application thereof, and relates to the field of functional materials. The preparation method provided by the invention comprises the following steps: firstly preparing a covalent organic framework material containing imine bonds, then mixing the covalent organic framework material with a substance containing phosphoric acid and cyano groups, carrying out vacuum cycle treatment for multiple times, and carrying out post-modification on the covalent organic framework material by utilizing a solvothermal method, so as to obtain the covalent organic framework material. The preparation method comprises the following steps: preparing a phosphate group and cyano group functionalized covalent organic framework material, and carrying out amidoximation treatment on the cyano group functionalized covalent organic framework material to obtain the amidoxime functionalized covalent organic framework material. The prepared covalent organic framework material containing the hydrophilic functional group has a hydrogen-bond interaction site, is small in water contact angle and high in thermal stability, has excellent performance of extracting uranium from seawater, and is high in adsorption capacity, high in adsorption rate, good in selectivity and high in cycling stability.

This invention belongs to the field of valuable metal recovery and water purification technology, and more specifically, relates to an organically covalently cross-linked alginate fiber, its preparation method, and its applications. This invention prepares alginate fibers with good water resistance through organic covalent cross-linking technology, which can be used for the recovery of valuable metals from aqueous solutions, the removal of heavy metals, the softening of drinking water, and the removal of cationic organic pollutants. It can solve the problem of calcium content in existing alginate fibers. 2+ The alginate adsorbent material prepared by ion crosslinking technology suffers from a large number of sacrificed adsorption sites, resulting in low adsorption capacity and limiting its widespread application. The organic covalently crosslinked alginate fiber designed and synthesized in this invention has the characteristics of fast adsorption rate, excellent adsorption performance, and easy solid-liquid separation. Moreover, the organic covalently crosslinked alginate fiber can be regenerated and reused.