80results about How to "Adsorptive stability" patented technology

The invention discloses an adsorbing material prepared from waste straws and capable of adsorbing trivalent arsenic from water as well as a preparation method and an application thereof, and belongs to the field of synthesis and application of environment functional materials. The adsorbing material is prepared by using the waste straws as matrixes through one-step quaternary ammoniated reaction. The preparation method is simple and the sources of the raw materials are wide; the prepared adsorbing material is capable of effectively adsorbing and removing the trivalent arsenic out of water; after adsorption, the trivalent arsenic in the adsorbing material can be desorbed by using a sodium chloride or sodium hydroxide solution; and the adsorbing material regenerated after desorption has stable arsenic adsorption property. The adsorbing material prepared by the method is an effective way of the resource utilization of the waste straws in farmlands.

The invention provides a method for preparing composite hydrogel through modifying bamboo shoot leftovers and an application of the composite hydrogel. An adsorption material is prepared by the steps of extracting cellulose from the bamboo shoot leftovers, then modifying by sodium chloroacetate, carrying out epoxy chloropropane cross-linking, followed by carrying out inverse suspension polymerization, and finally carrying out freeze drying. The prepared hydrogel beads are used as a bio-adsorbent, methylene blue is used as a dye model molecule, an adsorption effect on methylene blue is studied, and a theoretical foundation is laid for adsorption and sustained release of the hydrogel. The novel composite hydrogel prepared by utilizing the bamboo shoot processing waste leftovers is rich in raw material sources and low in cost, can achieve waste utilization, and promotes recycling economy; and the prepared hydrogel can be applied to adsorption of dye wastewater and adsorption and sustained release of a model drug, reduces pollution of bamboo shoot leftover arbitrarily discarding on the environment, and can play a certain role in promoting green development of ecological resources.

The invention relates to a naphtha denitrification adsorbent which is stable in absorption performance, large in absorption capacity, high in absorption efficiency, high in absorption selectively and renewable and a preparation method thereof. The adsorbent comprises a porous absorption carrier and acidic impregnation liquid loaded on the carrier. The absorbent can deeply remove organic nitride from naphtha by liquid-phase absorption and gas-phase absorption; the nitrogen content in the refined naphtha is less than or equal to 2.5ppm; and with the obvious reduction in the nitrogen content in the naphtha, the influences on the catalyst activity and equipment service life of downstream devices are reduced greatly, and the long-term operation and safe production of the devices are guaranteed.

The invention discloses a method for preparing an ammonia nitrogen adsorbent by using a banana peel. According to the method, the ammonia nitrogen adsorbent can be prepared by dehydration, crushing, soaking and scrubbing. Compared with the common method using peels and shells to prepare an activated carbon adsorbent through heating at high temperature, the method disclosed by the invention is simple and feasible in operation and has no need of heating, low energy consumption and high yield. The invention also provides an application of the ammonia nitrogen adsorbent prepared by using the method disclosed by the invention. The ammonia nitrogen adsorbent product prepared by the method for preparing the ammonia nitrogen adsorbent by using the banana peel disclosed by the invention has good adsorption effect on the ammonia nitrogen in 10-150mg/L of ammonia nitrogen aqueous solution, the time for reaching adsorption balance is short, the adsorptive property is stable, and the ammonia nitrogen adsorbent can be used for adsorption treatment of nitrogenous waste water. Meanwhile, the method disclosed by the invention also can realize the reclamation of the banana peels.

The invention discloses a process for treating coal chemical wastewater by adding an active material into an activated sludge pool, wherein the active material and biochemical treatment are combined and coordinated to treat the coal chemical wastewater. In the process, the wastewater is introduced to the activated sludge pool in which active coke or active semicoke is added; and macromolecular organic matters and refractory organic matters are effectively removed when the wastewater flows through the active coke or the active semicoke. According to the invention, the problems of operation instability of the activated sludge pool, adsorptivity reduction of an adsorptive material, or long sewage treatment time, high equipment cost and unavailability in fully utilizing the performance of theadsorptive material in the prior art are solved, and the process for treating the coal chemical wastewater, which has the advantages of operation stability, availability of fully utilizing the adsorptive material, high sewage treatment efficiency and low equipment cost, is provided.

The invention discloses a method for processing of percolating liquid biochemical membrane for urban daily rubbish after filtering and concentration. The waste water is the concentration liquid trapped by the filtering membrane or reverse osmosis membrane in the rubbish percolating liquid processing. The processing steps contain: passing the pretreated concentrated percolating liquid through the apparatus filled with composite functional absorption resin in the 0.5-5BV/h flux at room temperature, which is followed by neutralization with alkali after water absorbed out and is then discharged, regenerating the above resin with NaOH solution with the desorption agent of 0.5-3.0BV/h. The volume of the concentrated desorption solution is around 1/100 of that of the original percolating liquid and the concentrated desorption solution is burnt, buried or comprehensively used while the diluted desorption solution can be circulated for preparing the next batch of desorption agent. The invention is capable of reducing the concentration of CODCr in the concentrated percolating liquid from 6000mg/L or so to 300mg/L or so and finally realizes amount-reduced and innocuous concentrated percolating liquid. The method is characterized in simple processing, big processing amount, and capable of compensating the shortcomings of the current processing techniques of the urban daily rubbish percolating liquid.

The invention discloses a cadmium ion adsorbent made from alginate and ethylenediaminetetraacetic acid salt; carboxyl groups in the alginate and ethylenediaminetetraacetic acid salt are activated via 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide, ethylenediamine is added as a linker so as to cause condensation aeration of amino groups at two ends with the alginate and ethylenediaminetetraacetic acid salt, the alginate and the ethylenediaminetetraacetic acid salt are linked and are then gelled in an alkaline-earth metal ionic liquid, and drying is performed to obtain the cadmium ion adsorbent. The cadmium ion adsorbent has the advantages that selectivity for cadmium ions is high, adsorbing capacity is high, recycling is easy, the regenerating process is simple, and the adsorbing property of the adsorbent is kept stable after multiple recycling; the adsorbent is applicable to the treatment of cadmium-ion-containing wastewater and the treatment of various water samples acquired by treating cadmium-containing solid samples, and has good application value.

The invention provides a dye mesoporous adsorbent taking rice hulls as templates and silicon sources and a preparation method thereof, belonging to the technical field of fine chemical industry. The dye mesoporous adsorbent product is M-TiO2-SiO2, wherein M is Sc, or/and Vr, or/and Cd, or/and Mn, or/and Fe, or/and Co, or/and Ni, or/and Cu, or/and Zn, or/and Cr, or/and Hg, or/and Ag, or/and Au, or/and Pb. The preparation method comprises the following steps of: template pretreatment, ion exchange, sol-gel reaction and high-temperature calcination to remove the templates to obtain a mesoporous material. The rice hulls which are used as the templates have wide sources and low production cost and are environment-friendly; silicon dioxide existing in the rice hulls automatically deposits, and titanium dioxide and transition metals are doped into the material at the same time, thereby well improving the adsorption property and space structure of the material; and the obtained material has stable performance at high temperature, has simple preparation processes and mild conditions, is pollution-free, has renewable adsorptivity, and can be used for treating waste water of industrial organic dyes.

The invention discloses a spherical filter material which sequentially comprises a molded master ball layer, one or two or more functional adsorption layers and a porous protective layer from interior to exterior, wherein the material densities of all the layers of the spherical filter material are reduced from interior to exterior. The invention also discloses a method for preparing the spherical filter material. The spherical filter material and the method have the beneficial effects that (1) by integrating multiple odor removal functions together, the problem that a conventional odor filtering screen is single in adsorption performance or the problem of performance caused by the factor that multiple granular filter elements are non-uniformly mixed can be solved; (2) functional compounding is realized through a layer mixing mode, the densities of all the layers are reduced from interior to exterior, stable structure of the spherical filter material can be guaranteed, and different odors are removed in a layering centralized mode, so that the odor is efficiently removed; (3) due to cooperation between a pore-foaming agent and adhesive, the adsorption area and molding strength of the spherical filter material are optimized; and (4) the spherical filter material overcomes the defects that a conventional filter material is non-uniform in filling and continuous production is difficultly realized.

The invention discloses a preparation method and application of hypercrosslinked resin with controllable polarity and pore structure. The preparation method of the hypercrosslinked resin comprises the following steps: taking dimethyl acrylate as a crosslinking agent, taking 4-vinyl benzyl chloride as a monomer, carrying out suspension polymerization in the presence of a pore-foaming agent, a dispersant and an initiator to obtain precursor resin; and carrying out Friedel-Crafts reaction on the precursor resin under the catalytic action of lewis acid to obtain the hypercrosslinked resin. By regulating the mass ratio of the crosslinking agent to the monomer, the polarity and the pore structure of the hypercrosslinked resin can be controlled within a certain range; meanwhile, the polarity and the pore structure of the hypercrosslinked resin can be regulated within a proper range; the hypercrosslinked resin can be used for selectively adsorbing polar micromolecule aromatic organic compounds and has a wide application prospect; in addition, the preparation method of the hypercrosslinked resin is simple and is low in cost; the prepared hypercrosslinked resin is excellent in dynamic properties and high in reusability, and is suitable for industrial production.

The invention discloses a simple and convenient method of preparing magnetic bagasse based active carbon by one step. The method comprises the steps of taking bagasse in loose texture as a raw material, directly dipping an activator zinc chloride and a magnetic additive ferric chloride into the raw material in an ion form, and regulating the quantity of the magnetic additive, a carbonization temperature and system pressure to prepare the magnetic active carbon. According to the method, a magnetic precursor is introduced into the biological raw material in an ion form; activation, carbonizationand magnetization are performed synchronously; the magnetic active carbon is prepared by one step; a technical flow is simple; the production cost is low; all split products are effectively collectedin a vacuum environment; the environmental pollution is low; the obtained product is large in specific surface area and excellent in absorbability; a magnetic compound is formed in the raw material and securely combined with the raw material; and a magnetic property of the product is stable.

The invention discloses a method for treating nonylphenol polyoxyethylene ether industrial wastewater, belonging to the field of sewage treatment. In the method, industrial wastewater, containing polyoxyethylene ether and other organic substances, discharged from a production process is introduced to pass through an MN-202 iso-ultrahigh crosslinked adsorbent resin bed layer to make the polyoxyethylene ether, nonyl phenol and other organic substances be adsorbed onto resins, so that the polyoxyethylene ether and other organic substances are effectively separated; yielding water subjected to resin adsorption can be discharged in a standard-reaching manner after being subjected to a conventional aerobic treatment process; and the resins subjected to adsorption operation are eluted by using a mixed solution of NaOH and methyl alcohol to obtain eluent containing the polyoxyethylene ether and the nonyl phenol, the elutent can be recycled and comprehensively utilized by being directly returned to a production procedure, and the resins can be reused after being eluted. The system disclosed by the invention has the characteristics of simplicity for operation and maintenance, high pollutant removal rate and the like, and can be used for preventing the nonyl phenol with an estrogen effect as well as the polyoxyethylene ether and metabolic products thereof from being discharged to the natural world.

The invention relates to modified silica gel, and a preparation method and an adsorption application method thereof. The modified silica gel adopts a thiol group bonded on a silica gel skeleton to becomplexed with heavy metal ions, and the modified silica gel complexed with the heavy metal ions is eluted with thiourea-containing hydrochloric acid to recover heavy metals. The adsorption recovery method can improve the recovery rate of the heavy metal ions and reduce the consumption amount of hydrochloric acid during elution, thereby reducing waste during recovery of the noble heavy metal ionsin an industrial waste liquid, and reducing the discharge of waste residues, waste liquids and waste gas.

The invention discloses a preparation method of a filter core capable of fast and efficiently adsorbing caesium. The preparation method comprises the following steps of based on the weight of a substrate material, adding 1-3wt% of a coupling agent and 1-10wt% of ammonium phosphomolybdate into the substrate material, heating them to a temperature of 160-220 DEG C, uniformly stirring so that the substrate material is coupled with ammonium phosphomolybdate, carrying out filament spraying by micropores of 5 microns, wherein the sprayed filaments form an adsorption filter core having the thickness of 5-50mm on a revolving cylindrical framework material, uniformly coating ammonium phosphomolybdate on an outer surface of the adsorption filter core, and carrying out heating stable-aging at a temperature of 80-120 DEG C for 3-12h. The filter core has good water permeability and oxidation resistance, can be immersed in hot water at a temperature of below 100 DEG C for a long time, can resist irradiation decomposition, has stable adsorption performances, a fast detection rate, high efficiency and high precision, and can determine an adsorption rate without stable cesium measurement.

The invention discloses an adsorption film for synchronously fixing arsenic, antimony and vanadium ions and a preparation method of the adsorption film and belongs to the technical field of gradient diffusion films. The preparation method comprises the steps of mixing nano lanthanum oxide powder with a polyacrylamide glue preparation solution; sequentially adding an ammonium persulfate solution and a tetramethyl diethylamine solution into the obtained mixed solution; uniformly mixing the mixture; slowly injecting the mixed solution into a gap between two glass plates clamping U-shaped Teflon sheets to remove bubbles between the glass plates; horizontally drying the glass plates and then forming a film body; soaking the film body in pure water to obtain the adsorption film, wherein the nanolanthanum oxide powder is uniformly distributed on the surface of the adsorption film. The adsorption film has the advantages that the preparation process is simple, adsorption materials are easily synthesized, the distribution uniformity of the lanthanum oxide powder is high, and a good adsorption performance is achieved on arsenic, antimony and vanadium ions.

The invention discloses a preparation method of a biomass porous carbon material with a high specific surface area, and the method comprises the following steps: under the heating condition of inert atmosphere protection, preparing the biomass porous carbon material by taking sodium lignin sulfonate as a carbon precursor, taking anhydrous potassium carbonate as an activating agent and mixing with an N doping agent. The invention further discloses the biomass porous carbon material with the high specific surface area and application of the biomass porous carbon material to removal of chloramphenicol in a water body. Sodium lignin sulfonate which is low in cost, easy to obtain and stable in source is used as a raw material, the activating agent reacts with carbon to promote formation of pores, the N doping agent participates in the pore forming process, pore enlargement and pore structure increase in the carbon material are promoted, the specific surface area and the pore structure of the biomass porous carbon material are improved, and the adsorption quantity of pollutants is favorably improved; the preparation method is simple, high in efficiency, low in raw material cost and easy to popularize; the biomass porous carbon material disclosed by the invention has an excellent adsorption effect on chloramphenicol in a water body and is stable in adsorption performance.

The treating process of effluent from N-acetanilide production includes the following main steps: passing the filtrate of effluent from N-acetanilide production through adsorption tower filled with composite adsorption resin or macro porous adsorption resin in the conditions of 10-50 deg.c temperature and 0.5-5 BV/hr flow rate so as to adsorb most of N-acetanilide on the resin; regenerating the adsorbedresin with desorbing agent, regulating the pH value of high concentration desorbed liquid to 5-10, recovering N-acetanilide, returning the recovered N-acetanilide to production process and using the low concentration desorbed liquid for the next time of desorption. The treating process has COD and N-acetanilide eliminating rate up to 90 %, and desorption rate higher than 99 %. The used composite adsorption resin may be regenerated for further use, and the treating process is simple, efficient and economic.

The invention belongs to the technical field of composite hydrogel and discloses environmentally-sensitive hydrogel and a method and application for preparing the hydrogel by using bamboo shoot scraps. The method for preparing the environmentally-sensitive hydrogel comprises the steps that firstly, cellulose is extracted from bamboo shoot craps, and then sodium chloroacetate is adopted for carboxymethylation modification; secondly, the carboxymethylated bamboo shoot cellulose and beta-cyclodextrin are added into an aqueous solution of 12% Urea/7%NaOH; thirdly, epoxy chloropropane is added for cross-linking reaction; finally, unreacted reagents are washed away through subsequent treatment, and freeze drying is performed, so that the hydrogel is prepared. The prepared hydrogel is sensitive to temperature, pH, saline solutions and organic solvent, and therefore the hydrogel can be applied in the field of cationic dye or the field of drug slow release materials. Besides, according to the method, the reaction conditions are mild, process routes are simple and practicable, and industrialized operation is easy.

A bimetallic modified magnetic biomass activated carbon adsorbent, its preparation method and application in waste water treatment are disclosed. Peanut hull is taken as raw material, the binary mixedsystem of FeCl3.6H2O and MgCl2.6H2O is introduced as magnetizing material, and CO2 is used as physical activator. The activation and magnetization steps are completed at one time by impregnation andheat treatment. The preparation process of magnetic activated carbon is simplified and the magnetic activated carbon is modified. The prepared Fe-Mg bimetallic magnetic activated carbon is used to treat cationic dyestuff wastewater. The invention utilizes biomass agricultural and forestry wastes to treat dye wastewater, and the preparation process is simple, the cost is low, and the environmentalpollution is small. Fe3O4/MgO composite nanoparticles are formed by the introduction of binary system, especially suitable for the adsorption of malachite green dye, and the adsorbent is easy to recover, and the pH requirement of the actual wastewater is low, and the adsorbent is favorable for large-scale industrial application.

The invention discloses a high-concentration tetrahydrofuran organic waste gas treatment process and device, and belongs to the technical field of waste gas treatment. The device comprises a gas conveying device, an adsorption device, an LEL online monitoring device, a desorption device, a vacuum pump and a condensation recovery device, a nitrogen generator is arranged on the gas inlet pipeline; the adsorption device comprises at least two adsorption tanks which are arranged in parallel and have the same structure, and the adsorption material is a resin and activated carbon fiber composite layer; the LEL online monitoring device is connected with the gas conveying device, the adsorption device, the desorption device and the vacuum pump; the vacuum pump is connected with the adsorption tank; and the adsorption device and the desorption device are connected with the condensation recovery device. When the device is used for waste gas treatment, the LEL online monitoring device detects the concentration of waste gas in real time, the whole process is adjusted and controlled by the controller, and residual high-concentration waste gas in the valve switching process is rapidly adsorbed through activated carbon fibers. The whole treatment process system is in a low-oxygen state, the safety is improved, and the treatment efficiency and the solvent recovery rate are high.

The invention discloses a dynamic covalent imine gel adsorbent and a method for adsorbing phenolic compounds in water, an aerogel with stable structural properties is prepared by synthesis and modification of a dynamic covalent imine gel, and the aerogel with the stable structural properties acts as an adsorbent to adsorb the phenolic compounds such as bisphenol A and 1-naphthol in wastewater. Experimental results show that the adsorption capacity of the aerogel with the stable structural properties is significantly higher than the maximal adsorption capacity of carbon nanotubes, functional chitosan, a graphene oxide, cellulose porous microspheres and other adsorption materials for the phenolic compounds. The method has the advantages such as simple material preparation process, stable adsorption performance, reusability and no secondary pollution.