113 results about "Adsorption kinetics" patented technology

A composite adsorbent includes a shaped substrate having an adhesive film on a portion of at least one side and an adsorbent that has been immobilized as a layer on the adhesive portion of the substrate. The composite adsorbent is designed to be shaped into a form that provides a high adsorption capacity, low pressure drop, high volume capacity, and fast adsorption kinetics to effectively adsorb odors over an extended period of time. Optionally, the composite adsorbent is also used in combination with an air permeable unit wherein it is advantageously positioned to provide enhanced adsorption of contaminants found in gas phase.

The invention relates to a preparation method of a magnetic chitosan composite microsphere adsorbent, which belongs to the technical field of environmental material preparation. The preparation method comprises the following steps: firstly with FeCl3. 6H2O and FeCl2.4H2O as raw materials, preparing nano Fe3O4 by a coprecipitation process; and secondly, with glutaraldehyde as a crosslinking agent and Fe3O4, kaolin and chitosan as raw materials, synthesizing the novel magnetic chitosan composite microsphere adsorbent by an emulsification crosslinking process. The magnetic chitosan composite microsphere adsorbent is used for separating ciprofloxacin hydrochloride out of a water environment. The adsorption performance and the dynamic performance of the prepared adsorbent are researched in a static adsorption experiment. The results show that the novel magnetic chitosan composite microsphere adsorbent obtained by the method has a rapid adsorption dynamics characteristic, a high adsorption capacity and high magnetic-separation efficiency.

The invention discloses a preparation method of an amino functional magnetic silicon dioxide adsorption material. The method comprises the following preparation process that firstly, solid Fe3O4 nanoparticles are prepared by a solvothermal method; then, the solid Fe3O4 nano particles are put into a mixed solution of absolute ethyl alcohol and water; a certain quantity of ammonia water is added; after ultrasonic dispersion, ethyl orthosilicate is added drop by drop at normal temperature; after stirring reaction is performed for a period of time, a certain quantity of different kinds of amino-silane coupling agents are added; continuous stirring is performed for reaction for a period of time; after the product is subjected to magnetic separation, washing and vacuum drying, an amino functional Fe3O4@SiO2 composite adsorbing material with a core-shell structure is prepared. The prepared amino functional Fe3O4@SiO2 composite adsorbing material has good adsorption performance on virulent contaminants Cr(VI) in wastewater; particularly, the significant advantages of fast adsorption kinetics is realized; after one-hour adsorption, the adsorption is balanced; the characteristic of fast separation after the adsorbent adsorbs the contaminants is realized.

The invention relates to a preparation method for a novel magnetic chitosan composite microsphere antibiotic adsorbent, belonging to the technical field of preparing environment materials. The preparation method comprises the following steps: by taking FeCl3.6H2O, FeCl2.4H2O and halloysite nanotubes HNTs as raw materials, preparing Fe3O4/HNTs compound through co-precipitation, then by taking glutaraldehyde as a crosslinking agent and Fe3O4/HNTs compound and chitosan as raw materials, synthesizing the magnetic chitosan composite microsphere adsorbent by adopting an emulsification crosslinking method, and separating tetracycline (TC) in water environment. The static adsorption experiments are used for researching the adsorption balance and dynamics performance of the prepared adsorbent. Results show that the obtained novel magnetic chitosan composite microsphere antibiotic adsorbent has fast adsorption dynamics property, high adsorption capacity and high magnetic separation capability.

The invention relates to a method for preparing magnetic porous polystyrene microspheres on the basis of suspension polymerization, belonging to the technical field of preparation of environmental functional materials. The method comprises the following steps: synthesizing Fe3O4 magnetic particles by a solvothermal process; and preparing magnetic porous polystyrene microspheres by suspension polymerization by using styrene and divinylbenzene as functional monomers, azodiisobutyronitrile as an initiator and toluene and cyclohexanol as pore-forming agents. The obtained microspheres have abundant pores on the surface, thereby being beneficial to enhancing adsorbability; and the Fe3O4 magnetic particles inside the microspheres have magnetic stability, and can be quickly separated under the action of an external magnetic field. The adsorbent is used in a water environment for selectively adsorbing 2,4-dichlorophenol and 2,6-dichlorophenol. The static adsorption experiment result indicates that the magnetic porous microspheres prepared by the method have the advantages of favorable adsorption capacity, quick adsorption kinetic property and favorable regenerability.

The invention discloses a trace antibiotic efficient enrichment and separation method in a water environment. The adsorption performance of magnetic graphene on tetracycline antibiotics under different adsorption conditions is studied, and the change of the antibiotic concentration in solution before and after the adsorption is detected by an ultraviolet spectrophotometer, so that the corresponding adsorption rate of the antibiotics and the magnetic graphene adsorption capacity are calculated. The influence of different factors on the adsorption performance of the antibiotics is investigated; the optimum adsorption condition is obtained; the adsorption effect mechanism is analyzed; the adsorption kinetics and adsorption thermodynamics are discussed. According to the method, tetracycline hydrochloride TC is adopted as the research object, and the adsorption characteristics of MGO on the TC under different factors of the solution pH, temperature, dissolved organic matter (taking humic acid as an example) and the like are systemically studied, in particular to the adsorption kinetics and adsorption thermodynamics of the MGO on the TC.

The invention relates to a preparation method of an arteannuin molecularly imprinted composite membrane, belonging to the technical field of environmental material preparation. The method comprises the following steps: by using a regenerated cellulose membrane as a substrate, the arteannuin as a template molecule, acrylamide (AM) as a functional monomer and ethylene glycol dimethyl acrylate (EGDMA) as a crosslinking agent, cuprous bromide and N,N',N'',N''-pentamethyldiethylenetriamine constitute a catalytic system, and an atom transfer free-radical polymerization process is utilized to prepare the arteannuin molecularly imprinted composite membrane. A static adsorption experiment is used for researching the adsorption equilibrium, dynamics and selective recognition performance of the imprinted membrane; and the result proves that the arteannuin imprinted membrane has fast adsorption dynamical properties and excellent arteannuin molecule recognition performance.

The invention relates to a preparation method of a microzyme magnetic blotting composite microsphere adsorbent, and belongs to the technical field of environmentally-friendly functional material preparation. The method comprises the following steps: preparing ferriferrous oxide nanoparticles through a coprecipitation process, carrying out hydrophobic modification on the surface of the nanoparticles, preparing a stable Pickering emulsion with an oleic acid modified microzyme aqueous solution as a water phase, cyhalothrin as a template molecule, methacrylic acid and 4-vinylpyridine as functional monomers, ethylene glycol dimethacrylate as a cross-linking agent, dimethyl 2,2'-azobis(2-methylpropionate) as an initiator and hydrophobic Fe3O4 as an oil phase, and carrying out thermal-initiated polymerization to prepare the microzyme magnetic blotting composite microsphere adsorbent. Blotting microspheres obtained in the invention have a good magnetic stability, and the adsorption balance, the dynamics and the selection identification performance of the adsorbent are researched through static state adsorption experiments. Results show that the blotting adsorbent prepared in the invention has a good adsorption capacity, fast adsorption kinetics, and has a selection identification performance on LC.

The invention discloses a modified zeolite filling material BMZ-1 and its preparation method and application. The zeolite filling material is prepared by the following method: uniformly mixing natural zeolite sand, a zeolite powder mixing agent and a bonding agent; carrying out extrusion moulding, followed by drying and sintering to obtain the modified zeolite filling material, wherein the zeolite powder mixing agent is composed of a zeolite powder, starch, coal dust and portland cement. The filling material has selective ion exchange type adsorption capability of NH4<+> in a solution. The adsorption kinetics accords with quasi-second-order equation and the adsorption isotherm accords with Freundlich model. The filling material can be used in a high-concentration ammonia-nitrogen wastewater treatment system, being more conducive to adhesion growth of microorganisms to form biological zeolite. By the synergism of continuous ''exchange adsorption-biodegradation'', impact resistance of the treatment system is significantly raised, and the problem that it is hard to regenerate traditional zeolite for treating ammonia-nitrogen can be solved.

The invention relates to a preparation method of a mesoporous ferric hydroxide adsorbent used for adsorbing a highly toxic pollutant Cr(VI). The method comprises the steps of mixing an inorganic ferric salt solution, a urea solution and an ethanol solution of Pluronic triblock copolymer P123 or F127, stirring uniformly, and then heating in a drying box, thus obtaining turbid liquid of the mesoporous ferric hydroxide-Pluronic triblock copolymer; and carrying out centrifugal separation, distilled water washing, ethanol washing and vacuum drying on the turbid liquid in sequence at room temperature, thus preparing the adsorbent. The preparation method has the remarkable advantages of simplicity, convenience, moderate conditions, cheap materials which are easily available and the like. The prepared mesoporous ferric hydroxide adsorbent has relatively high adsorbing amount and relatively rapid adsorption kinetics on Cr(VI), and can be recycled after regeneration.

The invention relates to a method for measuring confirmations of a sulphydryl-modified linear DNA (deoxyribonucleic acid) or nucleic acid aptamer on a nano-gold surface. The method comprises the following steps of measuring the hydrate particle size of a linear DNA or nucleic acid aptamer and a nano-gold composite in the assembling process in a dynamic light scattering way, and measuring the confirmations of the linear DNA or nucleic acid aptamer on the nano-gold surface under different surface coating amounts by combining adsorption kinetics respectively. According to the method, under the condition of medium surface probe capacity, one end, connected with a sulphydryl, of the confirmation of the linear DNA on the nano-gold surface winds the nano-gold surface, and the other end of the confirmation of the linear DNA outwards extends perpendicularly to the surface; along with the increase of the surface probe capacity, the length of each DNA probe winding the nano-gold surface is continuously decreased, the outwards-extending tail of each DNA probe becomes longer and longer, and however, the nano-gold surface is kept in a DNA basic group adsorbed-wrapped low-surface free energy state; the confirmations can be described as DILOT (dynamic inner-layer and outer-tail) models significant on guiding the applications of nucleic acid sensor probe designs, DNA-hybridization-based nano-assembling and the like.

A composite adsorbent includes a substrate to which an adsorbent material has been immobilized. The composite adsorbent is designed to be shaped into a variety of forms that provide a high adsorption capacity, low pressure drop, high volume capacity, and fast adsorption kinetics to effectively adsorb contaminants. Optionally, the composite adsorbent is also used in combination with an air permeable unit wherein it is advantageously positioned to provide enhanced adsorption of contaminants found in gas phase.

The invention relates to a Fe-Mn loaded nanofiber membrane cadmium elimination material and a preparation method thereof, and belongs to the technical field of environment materials. The preparation method comprises the following steps: firstly, adopting electrospinning technique to prepare a polymer nanofiber membrane with large specific surface area, high porosity and strong toughness; secondly, adopting the polymer nanofiber membrane as a carrier material, and soaking the carrier material in a Fe-Mn salt solution; lastly, heating and adjusting pH to prepare a Fe-Mn oxidate loaded polymer nanofiber membrane with high specific surface area and simplicity in separation, wherein the nanofiber membrane can selectively adsorb and remove heavy metal cadmium Cd (II) in water, and has the advantages of fast adsorption kinetics, high adsorption capacity and simplicity in separation. The novel cadmium elimination material is simple in preparation method and low in cost, and has relatively good application prospects in purification treatment of cadmium contained water and wastewater.

The invention relates to the technical field of magnetic nano-material preparation, in particular to a preparation method of a magnetic composite nano-material. The method comprises the preparation processes of Fe3O4 magnetic nanoparticles and Fe3O4@mSiO2 composite magnetic nanoparticles, and specifically adopts a solvothermal method, namely, after ferric trichloride is dissolved in ethylene glycol, reaction is carried out in a high-pressure reaction kettle to obtain Fe3O4 magnetic nanoparticles, and the surfaces of the Fe3O4 magnetic nanoparticles are coated with a SiO2 shell layer. Accordingto the magnetic composite nano material prepared by the method, not only the chemical stability of Fe3O4 magnetic nanoparticles is enhanced, the biocompatibility of the composite magnetic nanoparticles is also improved; and the application of the prepared magnetic composite nano material can be realized only through adsorption which is low in cost, free of by-product generation and easy to operate, and the composite nano material has important significance in investigating adsorption kinetics of the magnetic composite nano material to antibiotics in water and researching an efficient removaltechnology of antibiotic residues in water, and has practical value.

The invention relates to a determination method for potential well deep distribution of methane adsorption by coal, which relates to a method for evaluating methane reserves in a coal reservoir, due to characteristic of uneven potential well depth of methane adsorption by raw coal body, multi-measuring point adsorption measurements under adsorption pressure and different constant temperature conditions can be carried out on a block coal sample; by using a Langmuir equation based on adsorption kinetics, the adsorption rate parameter b under different constant temperature conditions and the corresponding temperature T enable fitting calculation to obtain a proportion constant bm, the methane adsorption quantity under each constant temperature condition and adsorption pressure are subjected to segment fitting, quantity of different depths of potential wells can be calculated, and a potential well distribution histogram in a certain depth scope can be drafted. The method can be used for realizing accurate calculation of methane adsorption capability under different temperature and pressure conditions on the coal body, and can be used for accurately evaluating the coal bed gas content of the coal reservoir.

The invention provides a preparation method of a functional graphene oxide sponge. According to the method, sulfonated calix [4] arene and GO (graphene oxide) are synthesized firstly, sulfonated calix[4] arene and GO are subjected to a hydrothermal reaction, grapheme hydrogel is prepared and subjected to freeze drying, and sulfonated calix [4] arene modified 3D S-GOS (stereoscopic-graphene oxidesponge) is obtained. The material is subjected to characterization analysis with analytical means such as SEM, EDS, FT-IR, XRD and the like. With the adoption of a static adsorption method, influenceof pH value, ion strength, adsorption time, initial uranium concentration and temperature of an initial solution on S-GOS adsorbed uranium (VI) is researched, and adsorption kinetics and adsorption thermodynamics of the S-GOS are studied. The regeneration-recycle performance of the S-GOS adsorbed uranium (VI) is investigated finally. The synthesis method is simple, one new material with large superficial area and high supramolecular recognition and enrichment capacity is obtained, and the material is good in adsorptive property, convenient to recycle and excellent in biocompatibility.

Belonging to the technical field of organic sewage control, the invention particularly discloses a method for catalytic degradation of antibiotics by nitrogen-doped modified nano titanium dioxide andan evaluation method. The method for catalytic degradation of antibiotics by nitrogen-doped modified nano titanium dioxide provided by the invention has a remarkable degradation effect on ciprofloxacin, and the catalytic material has high stability and can be recycled. The evaluation method for the catalytic degradation of antibiotics by nitrogen-doped modified nano titanium dioxide provided by the invention can determine the catalytic efficiency of the catalytic material, and determine the stability, reusability and adsorption kinetics of the catalytic material, thus laying a solid research foundation for practical application of nitrogen-doped modified nano titanium dioxide.

The adsorption of poly(vinyl alcohol) (PVOH) from aqueous solution to hydrophobic solid-phase objects with varying chemical compositions, sizes, and geometries, is assessed as a new approach for surface modification. The effects of PVOH concentration, adsorption kinetics, PVOH molecular weight, adsorption temperature, solution ionic strength and stepwise deposition on wettability and adsorbed amounts were analyzed by water contact angle and X-ray Photoelectron Spectroscopy. PVOH adsorbs to solids significantly different than do other molecules. A much larger adsorbed amount and more dramatic improvement of wettability occurs compared to other molecules. The low solubility of PVOH, the strong tendency for it to crystallize at the solid/water interface and stabilization of the PVOH film by inter- and intra-molecular hydrogen bonding give additional driving forces for adsorption. The available —OH group from adsorbed PVOH is a versatile functional group and is further chemically transformed to a range of other functional groups to impart desired surface properties.

The invention discloses an adsorption kinetics based electronic nose data feature extraction method. The method utilizes an adsorption kinetics equation to fit an electronic nose response curve by corresponding curve fitting algorithm, and an adsorption kinetics equation usually has only two to three undetermined coefficients to be determined by fitting, therefore after fitting, each electronic nose sensor is corresponding to two to three characteristic values, thus reducing the dimension of original electronic nose data. At the same time, a multilayer perceptron neural network is introduced to process the feature extracted data and verify the advantage of the feature extraction method, and a good classification forecast effect can be achieved. The method provided by the invention utilizes the adsorption kinetics equation to analyze the relationship between electronic nose detection time and corresponding signals, reveals the adsorption mechanism of electronic nose sensors, can comprehensively and accurately extract the features of the electronic nose response curve, and maximumly represents the overall feature of the response curve.

A method for producing a zeolitic adsorbent includes providing a zeolite material, providing a zeolite material, providing a first clay binder material and a second clay binder material, the first clay binder material having a greater median particle size than the second clay binder material, determining a desired adsorption kinetics rate for the zeolitic adsorbent, wherein the desired adsorption kinetics rate is based at least in part on a separations process in which the zeolitic adsorbent is desired to be employed, and selecting either the first clay binder material or the second clay binder material based at least in part on the determined desired adsorption kinetics rate. The method further includes blending the zeolite material and the selected first or second clay binder material to form a zeolite/binder blended system, forming a plurality of shaped zeolitic adsorbent pieces from the exchanged zeolite/binder blended system, binder-converting the clay binder material into a zeolite material, and ion-exchanging the binder-converted shaped pieces with an exchange cation to form an ion-exchanged zeolite/binder blended system.

The invention relates to a sea-urchin-shaped iron/manganese binary-nanometer cadmium (Cd) elimination material and a preparation method thereof, and belongs to the technical field of environmental materials. Under the conditions of heating and pH regulation, an iron solution and a manganese solution are mixed according to a certain proportion, so that sea-urchin-shaped iron/manganese binary-nanometer oxide with a high specific surface area is prepared. The sea-urchin-shaped iron/manganese binary-nanometer oxide can be used for selectively adsorbing and eliminating heavy metal Cd (II) in water, and has the advantages of high adsorption kinetics speed, high adsorption capacity and wide pH application range. The preparation method of the novel Cd elimination material is simple and low in cost, and has a relatively good application prospect in terms of purification treatment on Cd-containing water and waste water.