52 results about "Adsorption equilibrium" patented technology

The present application provides a method for treating perfluorinated compound-containing wastewater rapidly. The method comprises the steps of: preparing an oxy-chloride iron adsorbent by pyrolyzing a raw material of ferric chloride; and treating the perfluorinated compound-containing wastewater by one of the following processes: (i) a batch adsorption process: adding the oxy-chloride iron into the perfluorinated compound-containing wastewater, then constant temperature oscillation, and filtration; or (ii) a dynamic adsorption process: flowing the perfluorinated compound-containing wastewater through an adsorption column filled with the oxy-chloride iron adsorbent, to complete the treatment of the perfluorinated compound-containing wastewater. The present application constructs an intrinsic interface micro-electric field on the surface of the oxy-chloride iron, which significantly accelerates the adsorption kinetics of the perfluorinated compound. The method of the present application is suitable for both batch and dynamic adsorption processes, and exhibits excellent adsorption performance in treating perfluorinated compounds, can reach adsorption equilibrium in 10 minutes, the dynamic adsorption rate is 4.3-6.5 times that of commercial adsorbents, and is easy to regenerate with anti-interference, and has a broad application prospect.

This invention discloses a pretreatment method for detecting trace perfluorinated and polyfluoroalkyl substances (PFAS) in complex matrix textiles, belonging to the field of materials analysis technology. The method involves placing the textile in an alkaline solvent containing an alkyl sulfonate displacing agent. Under heating conditions, the displacing agent utilizes its competitive adsorption mechanism to forcibly occupy matrix adsorption sites and displace the target analytes into the solvent. Subsequently, the temperature is rapidly lowered to the phase separation induction temperature, inducing supersaturation precipitation of the displacing agent, which then encapsulates impurities in situ and co-precipitates, forming a solid-liquid stratified system. Finally, the supernatant is collected for analysis. This invention utilizes the dual properties of the displacing agent—high-temperature solubilization and low-temperature phase change removal—to effectively break the strong adsorption equilibrium of aged textiles without using a solid-phase extraction column. This solves the contradiction between low extraction rate and significant matrix interference, significantly improving the recovery rate of PFAS. It offers advantages such as low cost, simple operation, and high accuracy.

The invention discloses preparation and application of a mesoporous polydopamine drug delivery system with multiple antioxidant functions, and belongs to the technical field of medicines.The drug delivery system is characterized in that plant exosomes with antioxidant and anti-inflammatory performance wrap mesoporous polydopamine to serve as a carrier, and the carrier with antioxidant and anti-inflammatory functions is loaded through an adsorption equilibrium method. A nano drug delivery system of a drug having an anti-inflammatory effect; the constructed nano drug delivery system has multiple antioxidant properties, and can regulate the phenotype of macrophages, increase the release of anti-inflammatory factors and promote the apoptosis of hepatic stellate cells.

The invention belongs to the field of selective adsorbents, and particularly relates to a rubidium and cesium ion selective adsorbent based on a graphene composite material and application thereof.The rubidium and cesium ion selective adsorbent is prepared by conducting surface carboxyl activation and crown ether grafting on the surface of a three-dimensional cross-linked graphene skeleton to obtain a crown ether functionalized graphene composite material; and performing in-situ growth of copper ferrocyanide nanoclusters on the crown ether functionalized graphene composite material. The rubidium cesium ion selective adsorbent realizes efficient selective adsorption of Rb < + > and Cs < + >, reaches adsorption equilibrium within 30 min in simulated high-level liquid waste, has Cs < + > and Rb < + > saturated adsorption capacities of 185 mg / g and 142 mg / g respectively, and has excellent acid-base stability and electrochemical regeneration capacity.

The application discloses a method for measuring internal diffusion coefficient and surface interfacial permeability of porous materials, which comprises the following steps: measuring the change of desorption amount of the porous materials under the condition of being swept by a carrier gas after adsorption equilibrium by using a zero-length column method; determining the initial time of desorption of the porous materials according to the change data of adsorbate concentration signal of the empty tube experiment under the same test condition; processing the obtained change data of desorption amount, integrating the desorption concentration with respect to time, so as to obtain the change data of the desorption mass fraction; determining the limiting mechanism of the mass transfer process of the porous materials, establishing a mass conservation equation for describing the test system of the porous materials, and obtaining a control equation for describing the change process of the desorption amount through mathematical derivation; and directly and simultaneously obtaining the internal diffusion coefficient and the surface interfacial permeability of the porous materials through calculation and fitting of the control equation obtained through derivation and the change data of the desorption amount of the porous materials measured through experiments.

The invention discloses an extraction and purification method and application of malus toringoides leaf and leaf tea polyphenol, and belongs to the field of separation and application of natural plant products. The method comprises the following steps: mixing malus toringoides fruit and leaf dry tea powder with ethanol according to a set material-to-liquid ratio, and carrying out ultrasonic treatment on the mixed solution to obtain a malus toringoides fruit and leaf tea polyphenol crude extract; adding the malus toringoides leaf and leaf polyphenol crude extract into a chromatographic column filled with macroporous resin, and performing elution adsorption with an ethanol solution after adsorption equilibrium is achieved; and recovering the eluent, and freeze-drying to obtain the purified malus toringoides leaf and leaf tea polyphenol extract. The malus toringoides leaf and leaf tea polyphenol extract obtained by the invention has strong free radical scavenging capacity, can effectively inhibit active oxygen of HepG2 cells, and can be used for researching, developing and preparing antioxidant functional foods and medicines.

The invention discloses a molecular dynamics simulation method for electron-induced gas desorption, and belongs to the technical field of molecular simulation. The method comprises the following steps: firstly, constructing an aluminum oxide molecular model, and then simulating adsorption equilibrium of hydrogen on the surface of aluminum oxide at different temperatures and air pressures by adopting a giant regular Monte Carlo method to obtain a stable adsorption configuration; then, based on the configuration, an electron force field is adopted to introduce explicit electron particles to simulate electron beam bombardment, and an electron-induced gas desorption kinetic process is simulated under a molecular dynamics framework; and finally, performing quantitative analysis on the desorption product. Through full-atom molecular dynamics simulation, coherent research from gas adsorption to electron-induced desorption is realized, the limitation that related experimental measurement is difficult and a micromechanism is difficult to reveal under a high-voltage condition is overcome, and an effective simulation tool is provided for deeply understanding a physical mechanism of dielectric surface gas desorption-induced discharge.

The application belongs to the technical field of adsorbents, and relates to a kind of for adsorbing silver amidoxime polyacrylonitrile-based modified microspheres and its preparation method and application, including the following steps: S1 obtains amidoxime polyacrylonitrile;S2, the preparation of amidoxime polyacrylonitrile-polydopamine microspheres: using hydrochloric acid dopamine and amidoxime polyacrylonitrile reaction obtains amidoxime polyacrylonitrile-polydopamine microspheres;S3, the preparation of thiol-modified amidoxime polyacrylonitrile-polydopamine microspheres: using sodium thiomethoxide and amidoxime polyacrylonitrile-polydopamine microspheres in sealed environment reaction obtains thiol-modified amidoxime polyacrylonitrile-polydopamine microspheres.The modified microspheres can adsorb nearly 80% of silver in solution within 2min at room temperature, and reach adsorption equilibrium after 30min, and the adsorption capacity can reach 483.5mg / g when the adsorption rate is nearly 100% (i.e., the adsorption rate reaches saturation).

The invention relates to a high-entropy inhibition reinforced separation method for low-grade argillaceous copper oxide ore, and belongs to the technical field of mineral processing. Aiming at the problems that the low-grade argillaceous copper oxide ore is low in copper grade, high in argillaceous gangue content and complex in mineral dissemination characteristic, and flotation inhibitor screening depends on experience judgment and manual trial and error, so that the copper concentrate quality is poor, and the recovery rate is low, a high-entropy inhibition system is constructed; the adsorption equilibrium constant and the adsorption entropy of inhibitor components on the gangue surface are taken as the basis, the high-entropy inhibitor is accurately screened and prepared, the physical and chemical properties of the mineral surface are selectively regulated and controlled from the thermodynamic level, and the interface interaction between the collecting agent and the gangue can be efficiently blocked under the low-dosage condition. In addition, the high-entropy inhibitor and the collecting agent can form a synergistic slurry mixing and bubble controlling effect, and in cooperation with the technological process that middlings do not return to roughing and concentration, accumulation and circulation of slime in a flotation system are avoided fundamentally, the problem that flotation is deteriorated by the slime is solved, and strengthened separation of the copper oxide ore is achieved.

The application discloses a preparation method of a Ce(OTf)3-MOF-303@GO composite adsorption material and application thereof, and sequentially comprises the following steps: graphene oxide preparation, Ce(OTf)3 / GO composite preparation, aluminum-based metal organic framework MOF-303 preparation and Ce(OTf)3-MOF-303@GO composite adsorption material preparation. The composite adsorption material prepared by the application can be used as an adsorbent for adsorbing lanthanum ions in a rare earth system, and has the advantages of low adsorbent dosage, short adsorption equilibrium time and the like. Meanwhile, the material has the advantages of simple preparation process, low energy consumption, high adsorption efficiency after repeated use, good environmental benefits and wide application prospect.

The invention relates to a carbonate type zinc oxide ore flotation method based on high-entropy inhibition, and belongs to the technical field of mineral processing. In order to solve the problems that in the zinc oxide ore flotation process, inhibitor selection mostly depends on experience judgment and manual trial and error, so that the inhibitor dosage is high, the inhibition efficiency is weak, and the selectivity is poor, the method is based on the thermodynamic theory of a complex multiphase solid-liquid system. By regulating and controlling the adsorption equilibrium constant of the inhibitor component on the mineral surface and the entropy change in the adsorption process, selective adsorption of the inhibitor component on the surfaces of calcite, dolomite and other carbonate minerals is enhanced, the effect of a collecting agent and gangue minerals is blocked, the quality of zinc concentrate is improved, and precise impurity removal and efficient enrichment of zinc oxide ore are achieved. The high-entropy inhibitor developed by the invention can inhibit calcium-containing gangue in a targeted manner under the condition of low dosage, and can cooperate with a collecting agent for size mixing and bubble control, so that excellent separation indexes of the zinc oxide ore can be obtained through short-process flotation, and a new way is opened up for green and efficient separation of the complex and refractory zinc oxide ore.

The invention discloses a preparation method of a Fenton-like catalyst based on an adsorption packaging strategy and application of the catalyst to degradation of organic pollutants, FeCl2. 4H2O is added into DMF to obtain a solution A, DHTA is added into a mixed solution of DMF, water and ethanol to obtain a solution B, the solution A and the solution B are mixed and subjected to a hydrothermal reaction, and iron-based MOF is obtained; the preparation method comprises the following steps: adding MOF and Co (NO3) 2.6 H2O into ethanol, and continuously stirring to enable Co ions to reach adsorption equilibrium on the surface of the MOF and migrate into a frame structure of the MOF; and calcining the obtained material to obtain the Co-encapsulated Fenton-like catalyst. The adsorption-packaging strategy enables the catalyst to form a highly dispersed CoFe2O4 / CoO heterostructure, the active site density is remarkably increased, metal oxide agglomeration and metal ion leaching are inhibited at the same time, and the catalyst has the characteristics of high catalytic activity, high stability and wide application range.

The invention relates to the technical field of high polymer material auxiliaries, and particularly discloses a preparation method of a silicone-coated PTFE anti-dripping agent, which comprises the following steps: 1, preparing an anchoring separant, mixing silicone rubber, inorganic powder and a coupling agent, and carrying out dynamic grafting reaction under the action of an initiator to construct an intermediate with a chemical bonding structure; 2, preparation of an anti-dripping agent: S1, mixing suspension polymerization PTFE with an anchoring separant in a high-speed mixer, and disassembling PTFE aggregate; s2, at a specific rotating speed, spraying a liquid silicone coating agent into the machine through an atomizing nozzle for wet mixing, so that a liquid phase forms a uniform adsorption layer on the surface of the anchoring separant; s3, after cooling, emulsion polymerization PTFE is added for low-speed mixing, and early fibrosis is prevented; and S4, standing and aging to enable the interface to reach adsorption equilibrium. According to the anti-dripping agent, the problem of crystal points caused by easy agglomeration of PTFE in a matrix is solved, so that the prepared anti-dripping agent improves the surface quality and mechanical toughness of a highlight injection molded part while ensuring the flame retardant property.

The invention relates to a method for preparing cured tannic acid through a radiation initiation method, and belongs to the technical field of functional materials. The preparation method comprises the following steps: preparing spherical cellulose by utilizing a soft template method, forming a water-in-oil (W / O) system by hydrophobic organic solvent paraffin and cellulose, adding span80 to avoid layering and agglomeration of water-phase liquid drops in an oil phase so as to form the spherical cellulose, and adding ultrasonic energy to promote the cellulose to form a porous spheroid; cellulose is radiated to obtain cellulose containing a carbon center free radical, when the free radical is in contact with GMA (glycidyl methacrylate), the carbon center free radical is in contact with C on the GMA to generate bridging reaction, the GMA can be connected to the cellulose only through one step, and the GMA has double effects of bridging and epoxy activation, so that the GMA can be used for preparing a high-temperature-resistant epoxy resin material for the high-temperature-resistant epoxy resin material for the high-temperature-resistant epoxy resin material for the high-temperature-resistant epoxy resin material. And the tannic acid can be connected without other reagents to prepare the cured tannic acid. The method is simple, the grafting rate is high, the tannic acid content in the formed cured tannic acid can reach 20 wt.%, and the adsorption equilibrium amount of the cured tannic acid to germanium can still reach 9.97 mg / g after the cured tannic acid is circulated for 10 times.

The invention belongs to the technical field of metal ion separation materials, and discloses a hierarchical porous bimetal MOFs material for zirconium and hafnium separation and a preparation method and application thereof.The material is prepared through the steps that Zn < 2 + > / Co < 2 + > (the molar ratio is 4: 1) serves as a bimetal center, 2-methylimidazole + 4-pyridylaldehyde serves as a hybrid ligand, PS microspheres serve as a hard template, a precursor is synthesized through a microwave-assisted coprecipitation method, and the hierarchical porous bimetal MOFs material is obtained; carbonizing, pickling and loading P507 to obtain the catalyst. The catalyst has a macropore-mesopore-micropore hierarchical pore structure, the BET specific surface area is greater than or equal to 1200m < 2 > / g, and the P507 loading capacity reaches 28%. In a 1M acidic system, the material has high adsorption capacity (more than or equal to 0.65 mmol / g) and high selectivity (the separation coefficient betaZr / Hf is more than or equal to 3.0) on Zr < 4 + >, the adsorption equilibrium is fast (less than or equal to 40 minutes), and the material has good stability and excellent cycle performance in strong acid and coexisting ion environments; the material is particularly suitable for efficient zirconium and hafnium separation in the fields of nuclear industry, zirconium and hafnium metallurgy and the like.

The application provides a kind of gold-containing material gold extraction performance test method, and relates to gold resource dressing technical field.The method comprises the following steps: grinding the gold-containing material to be tested to a specified fineness, and obtaining parallel samples with uniform gold grade by size reduction;an oxygen-free ore pulp system is constructed;the initial concentration of exogenous gold is calculated according to the material grade and the preset leaching rate, and an oxygen-free exogenous gold cyanide solution matching the industrial conditions is prepared;two groups of parallel tests, pure adsorption group and activated carbon synchronous competition group, are set up, and the reaction is carried out synchronously under the same oxygen-free condition until adsorption equilibrium;the gold grade of the original ore sample and the two groups of test ore samples are measured respectively;the total adsorbed gold amount, irreversible gold extraction amount, reversible adsorbed gold amount and irreversible gold extraction rate are calculated according to the test analysis results, and the gold extraction performance test is completed.The systematic interference of gold leaching from the ore itself is eliminated from the root, and the method is suitable for accurate evaluation of gold extraction performance of various gold-containing materials such as gold ore, gold concentrate, roasted slag and oxidized slag.

The application discloses a kind of hierarchical porous carbon sponge for radioactive iodine adsorption and preparation method thereof, belong to functional material technical field.The pine needle of the present application is washed, dried and crushed, then is placed in crucible, carbonizes under nitrogen atmosphere, i.e.pine needle hierarchical porous carbon pre-carbonization precursor is obtained;The pre-carbonization precursor is ground and crushed to be uniformly mixed with potassium hydroxide, and an activated precursor mixture is obtained;The ground activated precursor mixture is placed in crucible, annealed under nitrogen atmosphere, washed to neutral, and then dried overnight, i.e.hierarchical porous carbon adsorption material is obtained;The hierarchical porous carbon adsorption material is mixed with sodium alginate and water to form a uniform suspension;Melamine sponge (MS) is immersed in the suspension, stirred until completely soaked, then taken out and immersed in calcium chloride solution, filtered, washed and vacuum dried to obtain hierarchical porous carbon sponge.The material of the present application shows extremely fast adsorption kinetics and extremely high adsorption capacity for gaseous iodine. The data of examples show that the adsorption equilibrium can be reached within 2.5 hours, and the maximum adsorption capacity is as high as 2.3 g / g.

The present application relates to the technical field of adsorbing material, and particularly relates to a rare earth modified montmorillonite composite adsorbing material, a preparation method and application thereof.A preparation method of a rare earth modified montmorillonite composite adsorbing material, lanthanum nitrate or cerium nitrate, montmorillonite and glycine are uniformly dispersed in deionized water to obtain a mixed solution, and the mixed solution is evaporated and combusted to obtain montmorillonite loaded with LaONO3 or CeONO3, namely the rare earth modified montmorillonite composite adsorbing material.The rare earth modified montmorillonite composite adsorbing material prepared by the present application exhibits excellent selective adsorption capacity and extremely high adsorption efficiency for phosphate, and can reach adsorption equilibrium within 5 min, which is much faster than traditional adsorbents;in water bodies coexisting with various competitive anions, the rare earth modified montmorillonite composite adsorbing material can still maintain high removal efficiency for phosphorus, has good adsorption capacity in a wide range of pH 4-10, and the performance is more stable under neutral to alkaline conditions.

A method for predicting boron distribution in corrosion product deposits based on variable porosity is proposed. This method constructs the adsorption equilibrium of boron within the deposit layer through adsorption kinetics, obtaining the dynamically changing porosity of the corrosion product deposit layer. Transport equations for boron convection, diffusion, adsorption, and precipitation are then established. A mathematical model of boron transport coupled with chemical reactions based on dynamic variable porosity is obtained by discretization using the finite volume method. The model is iteratively solved to obtain the boron distribution under dynamic variable porosity in the corrosion product deposit layer. This invention can realize variable porosity during the boron precipitation process within the corrosion product layer and accurately predict the boron concentration distribution under variable porosity caused by boron precipitation in the corrosion product deposit layer.

The invention discloses a titanium lithium ion sieve and a preparation method thereof, and relates to the technical field of lithium ion adsorption. The method comprises the following steps: uniformly mixing a lithium source, anatase titanium dioxide, a tungsten source and carbon quantum dots, presintering at 290-350 DEG C for 50-80 minutes, heating to 550-750 DEG C, continuously calcining for 1.5-3 hours, and naturally cooling to obtain a precursor; and taking the precursor, eluting in a sodium thiosulfate aqueous solution, and drying the eluted solid phase to obtain the product. The titanium-based lithium ion sieve disclosed by the invention has relatively high adsorption rate and adsorption capacity and relatively low titanium solution loss, adsorption equilibrium can be achieved within 6 hours, the highest adsorption capacity can reach 40.06 mg / g, and the titanium solution loss is 0.52%.

A particle pore-solute migration adsorption equilibrium efficient solving method based on a discrete element pore density flow method comprises the following steps: 1) constructing a porous medium skeleton based on a discrete element method and a pore network model, and establishing a topological mapping relation between a pore space and adsorbent particles; based on a solid particle accumulation skeleton and a pore-pore throat channel thought of a pore network model, performing matrix storage on pore concentration and particle adsorption capacity; 2) through decoupling of a solute migration process, (1) constructing a solute convection term based on a pore network model so as to describe solute convection guided by fluid movement; (2) introducing a solute diffusion term based on a Fick second law; and 3) based on an isothermal adsorption equation, adopting a quasi-kinetic model for driving, evolving the adsorption equilibrium state of each central pore and the associated particle system by the system, representing the solid-liquid distribution rule of the solute in the complex porous medium, and adopting explicit time step iterative calculation to realize particle pore-solute adsorption equilibrium.

The application discloses a preparation method of a hydrophilic ceftriaxone magnetic molecular imprinting polymer, which comprises the following steps: taking magnetic iron-aluminum mixed hydroxide as a carrier, ceftriaxone as a template molecule, 3-amino-1,2,4-triazole as a functional monomer, ethylene glycol dimethacrylate as a crosslinking agent, ammonium persulfate as an initiator, and water as a porogen to prepare the hydrophilic ceftriaxone magnetic molecular imprinting polymer. The water-based ceftriaxone magnetic molecular imprinting polymer has high magnetization intensity and a more stable morphological structure, has good adsorption performance on ceftriaxone, reaches adsorption equilibrium within 30s, has an equilibrium adsorption capacity of 6.30mg / g, conforms to a quasi-second-order kinetic adsorption model, and can be directly applied to the determination of cephalosporin antibiotics in a water environment.

The invention discloses an energy-saving accurately-controlled PSA oxygen generator, and particularly relates to the technical field of oxygen generators, the energy-saving accurately-controlled PSA oxygen generator comprises a base, two oxygen generation assemblies are arranged on the base, and each oxygen generation assembly comprises a treatment tank arranged at the top of the base. The driving piece drives the reinforcing disc and the elastic filter sleeve to displace, extrudes the first molecular sieve to rotate, and is matched with dynamic disturbance of the second molecular sieve under the action of the elastic reset lining and the clamping teeth, so that pressure can be accurately applied to a molecular sieve bed layer, and nitrogen adsorption balance is broken; meanwhile, the electric heating ring performs targeted heating, so that nitrogen desorption in the micropores is accelerated, nitrogen residues are greatly reduced, the bed layer is prevented from loosening and shifting, and the gas uniformly flows through each molecular sieve particle. The stable bed layer structure ensures the uniformity of the adsorption separation process, and effectively solves the problem of fluctuation of oxygen production concentration.

The invention provides a hydrogen ion differentiated porous aromatic framework material as well as preparation and application thereof, and relates to the field of functional materials for extracting uranium from seawater. The preparation method comprises the following steps: mixing uranyl nitrate hexahydrate with an acidic ligand, heating and stirring in ethanol to prepare a uranyl ion imprinting compound containing different acidic functional groups, then mixing the imprinting compound with 1, 3, 5-tribromobenzene and tetra (4-ethynylphenyl), and carrying out vacuum circulation treatment to obtain the uranyl ion imprinting compound containing different acidic functional groups. A porous aromatic framework material containing different acidic functional groups is synthesized by utilizing a solvothermal method, and then the porous aromatic framework material containing different acidic functional groups is sequentially subjected to alkali washing and acid washing to obtain the hydrogen ion differential porous aromatic framework material containing different acidic functional groups. The prepared hydrogen ion differentiated porous aromatic framework material does not need optical / electro-catalysis equipment and has specific recognition capacity on uranyl carbonate ions at room temperature, the adsorption capacity can reach 4-122 mg / g, adsorption equilibrium is achieved within 5-120 min, and the adsorption capacity is still kept at 86%-97% after 1-20 times of circulation.

The present application belongs to the technical field of coal reservoir gas pressure measurement, and discloses a coal reservoir pore gas pressure rapid measurement method and system. The system comprises a sampling site automatic desorption module, a dead volume calibration module, a gas loss amount reduction module, a coal sample volume reduction module and a control system. The coal sample tank is a piston container, which is divided into a coal sample cavity and a pressurizing cavity. The dead volume calibration module calibrates the system empty volume, and the gas loss amount reduction module realizes automatic compensation of multiple components. The coal sample volume reduction module injects oil to compact the shaft and restore the pore volume. The measurement method comprises the following steps: downhole coal sample sampling, automatic measurement and conversion of loss amount, system access and vacuum pumping, dead volume calibration, automatic compensation of gas loss amount, coal sample compaction and pore volume restoration, reading of pressure value after adsorption equilibrium, etc. The present application realizes rapid, efficient, accurate and safe measurement of coal seam gas pressure under the condition of free hole sealing, effectively improves the gas pressure measurement efficiency and data reliability.

The invention relates to modified g-C3N4 as well as a preparation method and water treatment application thereof, and particularly discloses application of modified g-C3N4 in degrading organic pollutants in activated sodium percarbonate, which comprises the following steps: adding modified g-C3N4 into waste water containing organic pollutants, adding sodium percarbonate after adsorption equilibrium is achieved to obtain a reaction system, and adding the reaction system into the reaction system to obtain modified g-C3N4; and carrying out catalytic degradation by using a reaction system. According to the application of the modified g-C3N4 in activating the sodium percarbonate to degrade the organic pollutants in the water, the activation effect of the sodium percarbonate is high, and the modified g-C3N4 has an extremely high degradation effect on various organic pollutants in different complex water qualities in a wide pH value range. In the presence of high-concentration inorganic salt, the composite material still has an extremely strong organic pollutant degradation effect, and the degradation effect is not obviously reduced in multiple times of recycling.

This invention relates to an adsorbent for organic amine flotation and its preparation method, based on the design of polar microporous TpPa-NO2COF. Batch adsorption experiments showed that TpPa-NO2COF reaches adsorption equilibrium within 20 minutes, with a maximum adsorption capacity of 128.5 mg / g for ODA. The adsorption mechanism between TpPa-NO2COF and ODA mainly involves electrostatic interactions, polar interactions, van der Waals forces, hydrogen bonding, and hydrophobic effects. Furthermore, by in-situ deposition of TpPa-NO2COF powder on an organic nylon membrane substrate, rapid removal of ODA from sample solutions was achieved under dynamic pressure-driven membrane filtration conditions. Dynamic adsorption experiments showed that TpPa-NO2COF achieved an ODA extraction rate exceeding 90%, and the membrane material maintained a regeneration rate of over 93% after hydrochloric acid washing.

The invention discloses a kyanite flotation combined collecting agent and an application method thereof, and the kyanite flotation combined collecting agent comprises the following components in parts by weight: 2-4 parts of sodium oleate, 2-6 parts of lauryl amine, 1 part of a nonionic surfactant, 1 part of a pH regulator and 2 parts of an inhibitor. The sodium oleate-lauryl amine combined collecting agent generates hydrophobic association, so that the thickness and the structural stability of the whole adsorption layer can be enhanced, and the hydrophobicity and the flotation performance are remarkably enhanced. After the sodium oleate-lauryl amine combined collecting agent adsorbs to a certain degree, a stable composite adsorption layer is formed on the surface of kyanite. And meanwhile, adsorption balance is maintained through dynamic adjustment, and continuous effectiveness in the flotation process is ensured. And impurity sites can be selectively avoided, and the flotation selectivity is not affected.

FIELD: mining.SUBSTANCE: group of inventions relates to means for determining gas content in a methane reservoir in deep coal seams. When implementing the method for determining the gas content in a methane reservoir in deep coal seams, a base spectrum of the transverse relaxation time of a dried sample of reservoir rock, spectra of the transverse relaxation time before the establishment of adsorption equilibrium at various pressures and spectra of the transverse relaxation time after the establishment of adsorption equilibrium at various pressures are obtained. Based on the transverse relaxation time spectra before the adsorption equilibrium is established at different pressures and the transverse relaxation time spectra after the adsorption equilibrium is established at different pressures, the free gas signals are determined at different pressures. Based on the base transverse relaxation time spectrum, transverse relaxation time spectra before adsorption equilibrium is established at different pressures, and free gas signals at different pressures, the adsorbed gas signals are determined at different pressures. Based on the base transverse relaxation time spectrum, adsorbed gas signals at different pressures, and transverse relaxation time spectra after adsorption equilibrium has been established at different pressures, corrected transverse relaxation time spectra after adsorption equilibrium has been established at different pressures are determined. Based on the free gas signals at different pressures and the corrected transverse relaxation time spectra after establishing adsorption equilibrium at different pressures, the actual free gas content at different pressures is obtained. Based on the base transverse relaxation time spectrum, free gas signals at different pressures and corrected transverse relaxation time spectra after establishing adsorption equilibrium at different pressures, the actual content of adsorbed gas at different pressures is obtained. Based on the actual content of free gas and the actual content of adsorbed gas at different pressures, a model for determining the gas content is constructed. The dried rock mass from the deep coal seam methane reservoir under test and the pressure in the deep coal seam methane reservoir are obtained. This rock mass from the deep coal seam methane reservoir under test and the pressure in the deep coal seam methane reservoir as input values for the gas content determination model are used to obtain the methane content of the deep coal seam methane reservoir under test.EFFECT: increasing the accuracy of determining gas content in a methane reservoir in deep coal seams.4 cl, 12 dwg

This invention discloses a method for synthesizing an adsorbent for the rapid removal of methylene blue from water using waste plastics as raw materials, belonging to the field of pollutant treatment technology. The method for synthesizing the methylene blue adsorbent using PET as raw material includes the following steps: mixing PET material, sodium chloride, and zinc chloride, carbonizing to obtain a PET-based carbon material, mixing with a polyoxometalate solution, and reacting to obtain the methylene blue adsorbent. The adsorbent synthesized by this invention has advantages such as high removal rate and short adsorption equilibrium time. It facilitates the resource utilization of PET material while overcoming the shortcomings of existing adsorbents, such as low removal rate and long adsorption equilibrium time. This invention converts PET material into an adsorbent through carbonization, not only promoting the upgrading and recycling of PET materials but also providing another possibility for methylene blue adsorption.