132results about How to "Improve adsorption performance" patented technology

The invention discloses a preparing method of a manganese oxide-charcoal composite adsorbent, which comprises following steps: (1) air-drying or drying a biomass raw material, pulverizing into powder and uniformly mixing for standby; (2) taking potassium permanganate or sodium permanganate as a pre-treating agent, and performing pretreatment on the biomass raw material by adopting an equivalent-volume impregnation method; (3) drying, pyrolyzing and carbonizing the pretreated material to prepare the composite adsorbent material; (4) soaking the obtained composite adsorbent material with inorganic acid, and washing and drying to obtain the manganese oxide-charcoal composite adsorbent finished product. The method is simple, the prepared composite adsorbent is suitable for an adsorption method as an adsorbent for treating heavy metal ion-containing waste water, and has an advantage in the aspect of treating the acid heavy metal ion waste water particularly. The adsorbent can also serve as a conditioner for soil polluted by heavy metal ions, and achieves an action of controlling the absorption of plants to heavy metal ions by adsorbing the heavy ion ions after being applied into the soil.

A high-adsorbability powdered material forming technology based on a 3D printing technology adopts a 3D powder printing technology to rapidly form the high-adsorbability powdered material, tourmaline or diatomite powder is taken as a raw material, customized production can be performed according to user demand, and the 3D printing technology is adopted for forming the high-adsorbability powdered material and then combined with an appropriate low-temperature sintering aftertreatment technology, so that a formed part has certain strength to realize rapid manufacturing of a high-adsorbability powdered product with a complicated structure; and meanwhile, customized manufacturing of an environment-friendly artwork meeting user demand is realized, the production cycle of the high-adsorbability powdered product is shortened, the production cost is reduced, and the product quality is improved.

The invention discloses a nano zinc ferrite-graphene composite photocatalyst of visible light response and a preparation method thereof. The composite photocatalyst is formed by compounding zinc ferrite and graphene in a mass ratio of 1:2-1:6. The preparation method comprises the following steps of: putting graphite oxide into ethanol to perform ultrasonic dispersion, adding ferric nitrate and zinc nitrate into the ethanol to perform dissolution with stirring, then mixing the two systems, transferring the mixed system to a hydrothermal kettle to perform reaction, and performing centrifugal separation, washing and drying on a product after the reaction is completed to obtain the nano zinc ferrite-graphene composite photocatalyst. The nano zinc ferrite-graphene composite photocatalyst with uniform granule size and uniform dispersion is prepared by using graphene as a supporting material and adopting a hydrothermal synthesis method. The prepared nano zinc ferrite-graphene composite photocatalyst has good application prospect and economic benefit on the aspect of sewage treatment.

An adsorbent of zeolite molecular sieve with high adsorbent to CO is prepared through ion exchange between non-adhesive 4A molecular sieve and calcium chloride solution, water washing, baking to obtain 5A molecular sieve, immersing it in the diluted solution of sodium hydroxide or water glass, baking and activating.

A suspended microbe carrier with high microbial affinity, adsorption and hydrophilicity is a macroreticular skeleton and millipore skeleton combined structure. Its preparing process includes such steps as preparing the aqueous solution of polyvinyl alcohol, proportionally adding sulfuric acid and formaldehyde solution, reaction, adding powdered imorganic filler, high-speed stirring, filling it in a mould, foaming by filling the pre-heated air via millipore air distributor, and treating at 40-80 deg.C for 4-24 hr.

The invention discloses an amphoteric-cellulose-based composite material and application thereof. Quaternary ammonium-sulfonic acid cellulose serves as a carrier, grapheme oxide and chitosan are loaded in a blending manner, binding force among the three is utilized, and a quaternary ammonium-sulfonic acid cellulose / grapheme oxide / chitosan composite porous material is obtained through freeze drying. The quaternary ammonium-sulfonic acid cellulose / grapheme oxide / chitosan composite porous material comprises, by weight, 5-8 parts of quaternary ammonium-sulfonic acid cellulose, 0.5-3 parts of grapheme oxide and 0.5-3 parts of chitosan, is safe, non-poisonous and good in biocompatibility and degradability, has an orderly three-dimensional porous structure, good mechanical strength and efficient adsorption capability, can be used for water absorption and oil removal and processing of heavy metal ion waste water and organic waste water, and hopefully serves as a filtering material such as an air purification material and a medical adsorption material for use.

The invention particularly relates to a composite organic nursery substrate and a production method thereof. The substrate adopts leftovers of edible fungi and peanut shells as main materials, adopts peat, vermiculite, rice husk ash and attapulgite as accessories and adopts water retention agents, green fertilizers and ferrous sulfate as additives. The volume ratio of the main materials is 40-60:20-30 in sequence, the accessories are 5-20% of the main materials and the additives are in proper quantities. The production process of the substrate is as follows: decomposition pretreatment is carried on the main materials; the accessories and additives are added according to the volume ratio and are stirred evenly until the mixture passes test to be a qualified finished product. The substrate of the invention has good quality, rapid and neat emergence of seedlings, healthy plant growth and good water retention. The fertilizer efficiency can last for 30-50 days, enough for the growing development of the seedling stage, thus simplifying the management of labor power on plug seedling. Meanwhile, with good buffer action, the substrate can be widely applied to seedling culture of various organisms such as vegetables, flowers, cotton, rice, tobacco and nursery stocks, etc.

The invention relates to a membrane adsorbent for recycling nitrogen and phosphorus resources from waste water. A doping method is adopted to uniformly distribute resin capable of selectively adsorbing nitrogen and phosphorous into a casting film solution, a wet phase separation method is adopted for preparation, the casting film solution comprises 10-30wt% of polymer, 10-35wt% of resin, 4-30wt% of additive and the balance of solvent; the membrane adsorbent comprises a flat membrane adsorbent and a hollow fiber membrane adsorbent; and the membrane adsorbent can be used for preparing magnesium ammonium phosphate as a slow release fertilizer, thus the recycling of nitrogen and phosphorus resources is realized. The invention has the advantages that: the surface of the membrane adsorbent is provided with an open pore structure, the water flux is higher, and the adsorption and desorption performances of nitrogen and phosphorous ions are good; the preparation method of the membrane adsorbent is simple, easy to implement, low in cost, environmentally-friendly, safe and reliable as well as easy for realization of large-scale application and popularization, thus the preparation method has practical industrial application significance.

The invention discloses a compound heavy metal adsorbent. The compound soil heavy metal adsorbent comprises a floating core and a compound high molecule coating the floating core, wherein the mass ratio of the floating core to the compound high molecule is (1-5):1; the compound high molecule comprises a first polymer and a second polymer of which the mass ratio is (5:1)-(1:5); the first polymer is alginic acid or calcium alginate; the second polymer is modified chitosan; a modification group of the modified chitosan is small molecule chelator; the small molecule chelator has a carboxyl group and at least two chelation groups; the amino group ratio of the small molecule chelator substituted chitosan is above 30%; and the remaining amino groups in the chitosan and hydroxyl groups of the first polymer are crosslinked through dialdehyde molecules. According to the invention, the soil heavy metal adsorbent is prepared by compounding the modified chitosan modified with the small molecule chelator with the alginic acid / calcium alginate and the floating core, thereby improving the adsorbability of the soil heavy metal adsorbent.

The invention discloses a method for preparing a charcoal / attapulgite nanocomposite from attapulgite and hogwash fat. The method comprises the following steps: firstly, the attapulgite is used for absorbing the hogwash fat directly, the attapulgite with absorbed grease is subjected to anaerobic carbonization after filter pressing, and finally, the attapulgite nanocomposite loaded with charcoal is obtained after washing, drying and sieving. By means of the method, the hogwash fat is recycled, and further, a novel approach is provided for water purification as well as soil improvement and repair through the synergistic effect of the attapulgite and the charcoal.

The invention discloses a method for converting brick-red attapulgite into creamy white attapulgite, belonging to the technical fields of deep processing and preparation of nanometer silicate materials. The method comprises the steps of uniformly dispersing brick-red attapulgite clay into a solution containing acid and sulfur compounds according to the solid-to-liquid mass ratio of 1:30 to 1:100; reacting at the temperature of 180-250 DEG C for 12-96 hours; and naturally cooling to the room temperature, centrifuging, washing, drying and crushing to obtain the creamy white attapulgite. According to the method, ferric iron in an attapulgite framework is reduced through the interaction between sulfur in the sulfur compounds and attapulgite in a hydrothermal environment, so that the color and luster of the brick-red attapulgite are converted; and meanwhile, the zeta potential of the attapulgite is improved through the hydrothermal process, so that the adsorption performance of the attapulgite is improved, and a novel approach for the high-value utilization of the brick-red attapulgite clay is opened.

The invention relates to a method for preparing magnetic polyacrylamide / zirconium alginate gel beads. The method comprises the following steps: preparing a hydrophilic Fe3O4 nano-magnetic fluid by using a co-precipitation method; adding sodium alginate into the hydrophilic Fe3O4 nano-magnetic fluid, and preparing into a precursor solution of magnetic composite gel with multiple organic solvents; preparing a mixed solution of zirconium oxychloride and ammonium persulfate; and uniformly dropping the obtained gel precursor solution into the mixed solution, and carrying out a chemical cross-linking reaction, thereby obtaining the magnetic polyacrylamide / zirconium alginate gel beads. The adsorption capacity of the material on phosphate in water reaches 42.21mg-P / g, even if the material is recycled for 5 times, the adsorption capacity is basically maintained invariable, and the material has excellent stability and recycling characteristics. The method is simple in preparation process, easily controllable in conditions and suitable for large-scale production. Particularly, due to magnetic responsiveness, the magnetic polyacrylamide / zirconium alginate gel beads can be rapidly separated and recycled in an applied magnetic field and have the characteristics of being high in efficiency, energy-saving and environment-friendly.

The invention provides a method for preparing a ceramicadsorption material by using fly ash. The method comprises the steps that 1, fly ash and a pore forming agent are weighed and are mixed evenly; 2, caustic soda flakes and water glass are weighed, mixed and stirred till the caustic soda flakes are completely dissolved, and cooling is performed to obtain analkaliactivator; 3, the alkaliactivator is added while the powder in the step 1 is stirred, and semi-dried mixed powder is obtained after even mixing; 4, a proper amount of aqueous surfactant solution is added to the semi-dried mixed powder obtained in the step 3, and a sample is obtained through forming in a granulation or pouring mode; 5, the formed sample is subjected to wet maintenance for 12-24 hours, and the maintained sample is dried and calcined to prepare the ceramicadsorption material. The method utilizes the fly ash as a main raw material to prepare the geopolymerporous adsorption material, the pollution problem of the fly ash can be effectively relieved, and the problems of complicated preparation process, alkali waste production, high price, high temperature non-resistance, difficult industrial production and the like of the adsorption material can be also solved.

The invention relates to a method for modifying and treating coal powder, used to treat chromic waste water, wherein it uses some alcaine, adds some coal powder to prepare mixture; heats and modifies the coal powder; uses eccentric machine to separate the solid and liquid, dries the solid. Therefore, the coal powder can be converted into new composite with new zeolitic mineral phase, to improve the property of coal powder. The inventive coal powder can treat chromic waste water, with low cost.

The invention provides a gold nano catalyst with stable yeast cells and a preparation method and application thereof, and relates to yeast cell culture and treatment and the preparation method and application of the gold nano catalyst. Yeast cells or chemically-treated modified yeast cells which are subjected to shake-flask culture on the appropriate condition are used as a carrier, a stabilizing agent and a reducing agent, chloroauric acid is reduced on the mild reaction condition, and therefore the gold nano catalyst with the stable yeast cells is prepared, wherein the gold nano catalyst is good in dispersity and stability, uniform in particle size distribution and good in catalytic activity for reduction of nitryl in nitro-compounds, hydrodechlorination of chlorinated organic compounds and degradation of dye and other organic pollutants. Particularly, according to the method, the particle size of gold nano particles can be effectively adjusted and controlled by controlling the reaction condition. The preparation technology is simple, the process is environmentally friendly, and the gold nano catalyst is widely used for reduction of the nitryl in the nitro-compounds, hydrodechlorination of the chlorinated organic compounds and degradation of the dye and other organic pollutants.

The invention discloses a porous carbon material for treating organic dye and fluoride-containing waste water, and a preparation method thereof. The preparation method comprises the following steps: by taking polyvinyl alcohol and chitosan as a carbon source, dissolving respectively with deionized water and aluminum chloride water solution, blending the two solutions, adding glutaraldehyde for crosslinking, to obtain polyvinyl alcohol / chitosan hydrogel, freeze-drying to obtain an aerogel, then sequentially performing high-temperature carbonization, and soaking with diluted acid solution, to obtain the porous carbon material. The obtained porous carbon material has high adsorption performance to methyl orange and other dye molecules and fluorine ions, and can be used for removing organic dye and fluorine ions from waste water.

The invention relates to a preparation method for an infusorial earth / titanium dioxide composite photocatalyst with a nuclear / shell structure. The method comprises the steps as follows: (1), precursor of titanium is dissolved in an anhydrous low alcohol to obtain an anhydrous alcohol solution containing titanium; (2), powder of infusorial earth is added in the anhydrous alcohol solution containing titanium obtained in the step (1), and is subjected to ultrasonic treatment and stirred to obtain a uniform mixture; and (3), the uniform mixture is placed in a sealed container, a proper amount of water is placed in the sealed container in advance, the water and the uniform mixture are not in direct contact, the sealed container is heated to 70-200 DEG C, is kept warm for 1-120 hours, and then is cooled to a room temperature after thermal insulation, and powder is obtained, taken out, washed and dried to obtain the infusorial earth / titanium dioxide composite photocatalyst. The preparation method is simple and can be used for mass production; and the composite photocatalyst has a nuclear / shell structure, is high in adsorptive property and photocatalytic efficiency, and can be rapidly recovered through a low energy consumption method like sedimentation or atmospheric pressure filtration after the composite photocatalytic is used in a sewage medium.

The invention discloses a method for deep adsorption dephosphorization through ferric oxide hydrate-carrying attapulgite. The method comprises (1) preparing a ferric oxide hydrate-carrying attapulgite adsorbent with particle diameters of 2 to 6 mm through attapulgite purification, modification and granulation, and (2) filling an adsorption device with the adsorbent particles, making phosphorus-containing wastewater flow through a dephosphorization device, adjusting and controlling inlet and outlet water amounts to ensure standing time so that the adsorbent fully contacts with the phosphorus-containing wastewater and phosphorus is adsorbed and fixed to the surface of the adsorbent, and when the adsorbing capacity is saturated, carrying out soaking in a sodium hydroxide solution so that the adsorbent is regenerated. The adsorption synthesis process is simple and has strong operability. The adsorption device is simple and easy and realizes wastewater self-flowing treatment. The treated product water has a phosphorus concentration less than 0.1ppm. Under phosphorus removal total amount quantification, the wastewater discharge capability is increased. The adsorbent can be regenerated and recycled so that requirements of environmental protection are satisfied and a treatment cost is effectively reduced.

The invention discloses a preparation method of a composite aerogel type cigarette filter material, belonging to the technical field of preparation of filter materials. The preparation method comprises the following steps: mixing sepiolite with an organic acid solution, carrying out ultrasonic immersing, carrying out concentration under reduced pressure, carrying out drying, carrying out roasting,thus obtaining pretreated sepiolite, enabling the pretreated sepiolite to react with organic alkali, carrying out concentration under reduced pressure, carrying out drying, thus obtaining modified sepiolite, adding carbomer, phospholipid and carrageenan into water, carrying out ultrasonic dispersion, adding glycoprotein, carrying out constant-temperature stirring reaction, thus obtaining a mixedsolution, stirring the modified sepiolite and the mixed solution at constant temperature, injecting the obtained mixture into a mold, carrying out low-temperature precooling, carrying out vacuum freeze drying, and carrying out demolding, thus obtaining the composite aerogel type cigarette filter material. The composite aerogel type cigarette filter material prepared according to the technical scheme provided by the invention has the excellent adsorption property, has the obvious adsorbing effect for hazardous substances in cigarettes, has good mechanical property, and can reserve the fragranceof the cigarettes.

The invention provides a low-concentration nitrogen oxide adsorbent and a preparation method thereof, which belongs to the field of environmental protection. In the invention, blocky honeycomb carbon or honeycomb ceramic is used as a carrier material, one or more in Al2O3, a (Zr, Ce)O2 solid solution and / or TiO2 is / are used a carrier surface transition layer, and one or more or the composition of more metal oxides in cerium oxide, ruthenium oxide, manganese oxide / copper oxide is used as an adsorption active material. The low-concentration nitrogen oxide adsorbent can effectively adsorb multiple ppm grades of low-concentration NOx (NO, NO2 and the like) gas containing a large amount of water.

The invention belongs to the field of environmental protection and particularly relates to a modified preparation method for a corn straw capable of adsorbing arsenic in water. Middle nodules of the air-dried corn straw are removed, the corn straw is cut into short sticks, the short sticks are washed and dried to reach constant weight, the hard barks on the surfaces are removed, the short sticks are cut into straw particles, the straw particles are soaked in isopropyl alcohol for 8-10 hours, washed with deionized water and dried, then the processed straw particles are soaked in a NaOH solution with the concentration of 0.8-1.2mol / L for 6-8 hours, washed with deionized water and dried, then the processed straw particles are soaked in oxalic acid with the concentration of 0.18-0.22mol / L, washed with deionized water, and dried, so as to finally obtain a modified corn straw adsorbent, wherein the maximum saturated adsorption is up to 94[mu]gAs(III) / g (straw). The materials are easy to get, the cost is low, the toxicity is low, the modified method is simple in operation steps, the conditions are easy to achieve, high temperature or high pressure is not needed, the method is easy to realize, and the arsenic adsorption effect of the modified corn straw is good.

Belonging to the field of air purification, the invention discloses an organic-inorganic modified carbon / montmorillonite composite adsorption material. Na-montmorillonite is adopted as the main material, hydroxy-metal pillaring is carried out, then soluble sugar provides a carbon source, and under a hydrothermal condition, the organic-inorganic modified carbon / montmorillonite composite adsorption material can be synthesized. The organic-inorganic modified carbon / montmorillonite composite material obtained by the method provided by the invention is non-toxic, non-corrosive, environment-friendly and low in preparation cost, not only has the characteristics of porosity and high specific surface area of inorganic pillared montmorillonite, but also has the characteristic of high carbon content of organic montmorillonite, therefore has excellent adsorption properties to volatile organic exhaust gas, and has a maximum toluene adsorption capacity up to 39.8mg / g, thus having the potential of replacing other air purification adsorbents.

The invention discloses an application method of inorganic nano-materials in dust suppression. The inorganic nano-materials are at least one of nanosilicon dioxide, nanometer copper oxide and graphene oxide; in the application method, the inorganic nano-materials are mixed with a solvent to obtain an inorganic nano-material solution, and the inorganic nano-material solution is sprayed on the surface of dust. As is discovered in researches, the inorganic nano-materials are taken as a dust suppressant have good dust solidifying effect; the application method has the advantages that the surface of the dust can be well covered, dust clearance is filled, dust particles are bonded, wind erosion-resistant performance of the dust is improved, and the dust is removed; the dust suppressant has the advantages of no-toxic, no erosion, environment friendliness and the like and is widely applicable to the field of dust suppression, and secondary pollution is avoided.

The invention discloses a novel alginate / halloysite nanotube composite-porous ball and a preparation method therefor, belonging to the field of nano materials. Porous balls are formed by overlapping halloysite nanotubes, a large amount of through micropores are contained in the porous balls, the porous balls combine the adsorption functions of alginate and the halloysite nanotubes and also have good mechanical and chemical stability. Raw materials adopted are all cheap, natural, harmless and environmentally-friendly, are easy to obtain and can be taken as novel adsorbents in the fields of waste water treatment, drug release, etc.

The invention discloses a method for preparing a charcoal-supported attapulgite nano composite by using antibiotic wastewater, which belongs to the technical field of a composite material. According to the invention, attapulgite clay is processed by compound acid, so that carbonate in the attapulgite clay is fully decomposed, an adsorption duct of the attapulgite can be dredged, a surface-modification function group is simultaneously endowed, adsorptive property on antibiotic can be effectively increased; the attapulgite capable of adsorbing the antibiotic is taken as a carbon source, micropores and a meso-structure of the attapulgite can be activated through calcining treatment, and the adsorption performance of the attapulgite on heavy metal ions can be obviously increased through in-site support of charcoal. The method realizes antibiotic waste water treatment, and realizes reutilization of organic molecules such as the antibiotic, so that an adsorbent with excellent adsorption performance can be obtained, and the method has wide application prospect on water body purification, soil improvement and restoration.

The invention belongs to the field of chemical analysis testing instruments and equipment, and relates to a novel magnetic biomass activated carbon composite material, which has both the magnetic separation ability of magnetic nanomaterials and the high adsorption performance of activated carbon, and can quickly and efficiently remove dye pollutants in water bodies , and has good stability. In addition, the magnetic nanocomposite adsorbent prepared by the invention has a simple preparation method, low raw material cost and environmental friendliness.

The integral valveless adsorbed solar refrigerator has lumpy adsorbing material coated in thin copper sheet filled in the adsorption bed, heat insulating material filled peripherally, transparent fiber cover plate on the upper surface, adsoption bed connected directly to condensator and evaporator in ice groove, condensator fin pipe comprising stainless steel base pipe and aluminium fins, evaporator with trapezoidal section, open-mouthed ice groove of stainless steel sheet, casing of polyurethane and movable support. It can be made in refrigerator system with small heat collecting area or with relatively larger heat collecting area and is suitable for use in area with rich solar energy resource.

The invention relates to a preparation method of a mesoporous potamogeton pectinatus adsorption material for heavy metal ions, and belongs to the field of adsorption material preparation. According to the invention, Potamogeton pectinatus stems are taken as raw materials, and soaked in water to enable deionized water enter into inner pores of the stems, and quickly frozen by liquid nitrogen to enable water in the pores of the stems frozen, inner apertures of the stems are widened to increase porosities by using an ice splitting effect, namely the principle that water freezes to increase volume, then adsorption sites of the stems are treated by methanol to be fully exposed, the number of active groups on the surfaces of the stems and in the inner pores is further increased through composite fermentation modification of hydroxycitric acid in a garcinia cambogia extracting solution and microorganisms in biogas liquid to increase the adsorption rate of the stems, finally freeze drying is carried out to obtain the adsorption material. The method disclosed by the invention not only changes surface properties of the potamogeton pectinatus stems, but also changes the internal structures of the stems to improve adsorption properties of the stems so as to facilitate more thorough adsorption, thus the adsorption material can be thoroughly utilized, and the utilization rate of the adsorption material is increased.

The invention discloses a preparation method of a halloysite-carbon composite adsorbent for removing NO. The halloysite-carbon composite adsorbent is prepared by taking cheap halloysite and chitosan as raw materials and taking potassium carbonate free of pollution to the environment as an activating agent through one-step carbonization and activation. According to the absorbent, the specific area can reach 1,500 m<2> / g or above, a developed micropore and mesopore structure is achieved, and the certain mechanical strength is achieved; the raw material source is wide, the cost is low, a preparation technology is simple, and the good adsorption capacity to nitric oxide is achieved.

The invention discloses a photo-Fenton catalyst and a preparation method and application thereof. The preparation method comprises the following steps that a Ce-MOF film structure is formed on gamma-Al2O3 firstly, after vacuum drying, the Ce-MOF film structure is dipped in an OPA solution, an alkylation reaction is conducted, then alpha-FeOOH is generated on a formed compound through an in-situ growing method, and thus the compound-type photo-Fenton catalyst is obtained. The MOF structure with hydrophobic performance is formed on the gamma-Al2O3, the adsorption performance of VOCs can be enhanced, electronic transmissibility is strengthened, Fe<3+> is promoted to be reduced into Fe<2+>, meanwhile, Ce-MOF has abundant acid sites, and generating of a photo-Fenton catalytic oxidation reactionis also facilitated. Organic groups on MOF and the in-situ growing mode of the alpha-FeOOH can prevent iron leaching, the stability of the catalyst can be further improved, and the service life is prolonged.