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136results about How to "Improve adsorption efficiency" patented technology

Preparation method of magnetic core-shell alginate microsphere adsorbent

The invention discloses a preparation method of a magnetic core-shell alginate microsphere adsorbent. The preparation method comprises the following steps: preparing two parts of sodium alginate solution, wherein one part is shell layer solution, and dichloromethane and nanometer ferroferric oxide are added into the other part and uniformly mixed to obtain nuclear layer solution; and respectively injecting the shell layer solution and the nuclear layer solution into the outer layer and the inner layer of a stainless steel coaxial needle head, jetting the shell layer solution and the nuclear layer solution into a receiving device filled with calcium chloride solution under high-pressure electrostatic jetting conditions by utilizing high-pressure electrostatic spinning equipment, stirring, filtering, then, immersing the microsphere in metal salt solution, stirring, filtering, and drying to prepare the magnetic core-shell alginate microsphere adsorbent. The magnetic core-shell alginate microsphere adsorbent has the adsorptive property of an alginate gel microsphere adsorbent to a part of anion and also has magnetic property; therefore, an adsorbing material is more convenient and rapid to recycle; the use recovery cost is reduced; the application range is enlarged; and the preparation method can be widely applied to anion adsorption concentration, settling separation and waste water treatment.
Owner:SOUTHWEAT UNIV OF SCI & TECH

Preparation method and use of sulfydryl cotton stalk bark

The invention discloses a preparation method and use technique of sulfydryl cotton stalk bark. The method is characterized by comprising: adding 48 to 52 mass percent of thioglycolic acid, 36 to 46 mass percent of tetrahydrofuran, 2 to 4 mass percent of acetic anhydride, 0.2 to 0.5 mass percent of concentrated sulfuric acid and 12 to 20 mass percent of degummed cotton stalk bark into a triangularflask with a plug, plugging the triangular flask, stirring and refluxing at 55 to 65 DEG C for 3 to 4 hours, washing with deionized water, filtering under vacuum, till the filtrate is neutral, washing with a small amount of ethanol, drying in an oven at 35 DEG C, and thus obtaining the sulfydryl cotton stalk bark. The sulfydryl cotton stalk bark has high metal iron absorbability, can absorb and elute various metal ions in water, the absorption efficiency and speed of the sulfydryl cotton stalk bark are high, and the physical, chemical and mechanical properties of the sulfydryl cotton stalk bark are stable, the sulfydryl cotton stalk bark can be used in a wide pH value range, the high regenerability of the sulfydryl cotton stalk bark makes the repeated use times of the sulfydryl cotton stalk bark 10 percent higher than that of sulphydryl cotton, the waste of cotton stalk is utilized, cost is saved and environment pollution is avoided.
Owner:UNIV OF JINAN

Load type arsenic adsorbent, preparation method and application thereof, and arsenic removal method

The invention relates to a load type arsenic adsorbent, a preparation method and application thereof, and an arsenic removal method. The adsorbent contains an aluminium oxide carrier and an iron element loaded on the aluminium oxide carrier. The load type arsenic adsorbent contains the aluminium oxide carrier and the iron element loaded on the aluminium oxide carrier. In the load type arsenic adsorbent, the 2[Theta] maximum peak intensity of the X ray characteristic peak of the iron element is 33.5 degrees; the dry basis weight of the load type arsenic adsorbent is taken as a standard, and thecontent of the iron element which is metered in terms of oxide is 10w% or below. The preparation method comprises the following steps: carrying out impregnation on the aluminium oxide carrier in mixed liquid containing ferric iron salt and organic acid, loading the ferric iron salt on the aluminium oxide carrier to obtain a load type arsenic adsorbent precursor, and drying and roasting. The arsenic removal method comprises the following steps: enabling the adsorbent to be in contact with the arsenic to remove the arsenic. According to the load type arsenic adsorbent, arsenic can be efficiently gathered, and especially, gaseous phase arsenic is suitable for arsenic removal processing for arsenic-contained smoke.
Owner:CHINA SHENHUA ENERGY CO LTD +2

Activated carbon material having electrostatic adsorption and anion releasing effect and preparation method thereof

The invention discloses an activated carbon material having electrostatic adsorption and anion releasing effect. The activated carbon material is characterized in that the activated carbon material is prepared from the following raw materials in part by weight: 135-150 parts of activated carbon, 2-3 parts of aluminum hydroxide, 2-3 parts of palmitic acid, 3-5 parts of propylene glycol, 5-7 parts of ferric chloride, 12-14 parts of bentonite, 2-3 parts of ammonium chloride, 1.5-2.5 parts of dimethyldioctadecylammonium bromide, 6-9 parts of tourmaline powder, 4-6 parts of adsorption assistant and appropriate amount of water. According to the activated carbon material, a surface active agent, bentonite and other ingredients are added for modifying the activated carbon, dusts in air can be adsorbed into the activated carbon material due to electrostatic adsorption of the tourmaline powder, and anions are released simultaneously and are beneficial to human body; and the adsorption efficiency is improved due to addition of the adsorption assistant. The filter material can effectively remove acid or alkaline or compound type volatile harmful gases, has long service life and is suitable for production of a filter screen of the air conditioner and the like.
Owner:BENGBU DEMO FILTRATION TECH

Preparation method of alpha-FeOOH nanorod-loading porous charcoal composite material

The invention relates to a preparation method of an alpha-FeOOH nanorod-loading porous charcoal composite material, relates to a preparation method of the porous charcoal composite material, and aimsto solve the problems that an existing method for loading nano particles on a porous carbon material is high in cost, and nanoscale FeOOH particles are easy to agglomerate. The method comprises the following steps: (1) pyrolyzing and carbonizing a charcoal raw material; (2) cleaning the pyrolyzed and carbonized charcoal raw material, drying, immersing into an acidic oxidizing agent solution, heating, flushing, and drying to obtain a porous charcoal material; (3) immersing the porous charcoal material into a ferric salt water solution, stirring, adding a strong alkaline solution, uniformly mixing, putting mixed liquid into a reaction kettle, carrying out hydrothermal reaction, and finally vacuum drying to obtain the alpha-FeOOH nanorod-loaded porous charcoal composite material. Maize strawsas agricultural waste are low in price and easy to get, so that the cost is reduced when the maize straws are adopted as a carbon source. The preparation method of the alpha-FeOOH nanorod-loaded porous charcoal composite material, provided by the invention is applied to the field of biological composites.
Owner:NORTHEAST AGRICULTURAL UNIVERSITY

Binchotan-added activated carbon filter material for air conditioners and preparation method thereof

The invention discloses a Binchotan-added activated carbon filter material for air conditioners. The Binchotan-added activated carbon filter material is characterized by being prepared from the following raw materials, by weight, 135-145 parts of cocoanut active charcoal, 10-15 parts of Binchotan, 2-3 parts of potassium hydroxide, 3-4 parts of brown sugar, 12-14 parts of zeolite powder, 7-9 parts of meerschaum powder, 3-5 parts of seaweed meal, 1-2 parts of sodium alginate, 1-2 parts of D-sodium erythorbate, 4-6 parts of sodium chloride, 4-6 parts of an adsorbent-aid and a proper amount of water. Apart from the addition of components such as zeolite powder, meerschaum powder and the like that enhance the adsorbing effect, the component Binchotan is also added, enhancing adsorptivity of activated carbon, releasing negative ions, blocking electromagnetic wave and appropriately adjusting indoor humidity. The component Binchotan has an excellent health-care effect. In cooperation of the adsorbent-aid, adsorption efficiency is enhanced, and indoor harmful gases are removed rapidly to make the air indoors fresh and pleasant. The preparation process is simple, and the activated carbon filter material has long service life and can repeatedly be used.
Owner:MINGGUANG JIAYI ELECTRIC CONTROL TECH

Modified water-soluble chitosan flocculating agent and preparation method thereof

The invention discloses a modified water-soluble chitosan flocculating agent and a preparation method thereof. The preparation method comprises the following steps: a carboxymethyl reaction step: dispersing chitosan into a mixed solution of isopropanol and sodium hydroxide, stirring for alkalization so as to obtain a reaction mixture, dissolving monochloro acetic acid into isopropanol to obtain asolution, dropwise adding the solution into the reaction mixture, reacting for 3-5 hours, adding an ethanol water solution to terminate the reaction, washing, and drying, so as to obtain carboxymethylchitosan; and a cross-linking reaction step: dissolving carboxymethyl chitosan into hydrochloric acid, adjusting the pH value to 5, dissolving 3,4-dihydroxyphenylacetic acid into a certain amount ofwater to obtain a solution, adding the solution into a carboxymethyl chitosan solution, dissolving a mixture of EDC and NHS into mixed liquid of water and ethanol to obtain a solution, adding the solution into a reaction solution, adding hydrogen peroxide into the reaction solution, stirring to maintain the pH value of the reaction solution at 4.5-5.0, and reacting at the room temperature for 9-11hours, so as to obtain the modified water-soluble chitosan flocculating agent. The flocculating agent disclosed by the invention has good water solubility and flocculating property.
Owner:GUANGZHOU ZHENQING ENVIRONMENTAL PROTECTION TECH

Double-caterpillar-band wall-climbing monitoring robot

The invention relates to a double-caterpillar-band wall-climbing monitoring robot. The double-caterpillar-band wall-climbing monitoring robot comprises a static electricity generator, a battery pack, a control transmission module, a camera and a pair of drive motors, wherein the static electricity generator, the battery pack, the control transmission module, the camera and the drive motors are arranged on a base. Caterpillar band frames are arranged on the two sides of the base and each caterpillar band frame is covered with a caterpillar band. Each caterpillar band is a flexible comb-tooth-type bipolar caterpillar band. The two sides of each caterpillar band are respectively provided with a tooth root. A plurality of comb teeth connected with every two tooth roots on the two sides are arranged between the corresponding tooth roots in parallel. Each comb tooth is covered with a polyimide insulation material. The static electricity generator is connected with the caterpillar bands through electric brushes, so that the tooth roots and the comb teeth of the caterpillar bands carry high-voltage positive static electricity and high-voltage negative static electricity. A wall is stimulated to generate inductive charges so that the whole monitoring robot can be attached to the wall. The double-caterpillar-band wall-climbing monitoring robot is reasonable in structure, strong in attraction capacity, flexible in movement and capable of achieving inclined walking and zero-radius turning. The double-caterpillar-band wall-climbing monitoring robot is wide in application prospect in the fields of anti-terrorist investigation, high-rise detection and the like.
Owner:HARBIN INST OF TECH AT WEIHAI

Preparation method and application of cyanobacteria modified charcoal with high adsorption efficiency

The invention discloses a preparation method and application of cyanobacteria modified biochar with high adsorption efficiency, and the preparation method comprises the following specific steps: S1, primary carbonization: drying and crushing cyanobacteria, conducting carbonizing in an inert atmosphere, raising the temperature from room temperature to 300 DEG C, keeping the temperature for 1-2 hours, and conducting cooling to obtain a primary carbon material; S2, secondary carbonization: crushing the primary carbon material, mixing the crushed primary carbon material with KOH according to a mass ratio of 1:(2-3), and adding deionized water to make the concentration of KOH be 20-40%, drying the obtained mixture, conducting carbonizing in an inert atmosphere, raising the temperature from roomtemperature to 700 DEG C, keeping the temperature for 1-3h, and conducting cooling to obtain a coarse carbon material; and S3, post-treatment: adding 20-40% of HNO3 or HCl into the crude carbon material, conducting oscillating in a shaking table for 2-3 hours, removing the supernatant, washing the obtained solid with water until the solid is neutral, and conducting drying to obtain the modified cyanobacteria biochar. The cyanobacteria modified biochar with high adsorption efficiency prepared by the method is applied to water treatment and soil remediation, and has adsorption and immobilization effects on organic pollutants.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI

Photocatalysis bio-adsorbent and preparing method and application thereof

The invention discloses a photocatalysis bio-adsorbent and a preparing method and application thereof. The photocatalysis bio-adsorbent comprises phanerochaete chrysosporium balls, graphite type C3N4 and calcium alginate, wherein graphite type C3N4 is wrapped in hyphae of the phanerochaete chrysosporium balls through calcium alginate. The preparing method comprises the steps of adding graphite type C3N4 to sodium alga acid solution for ultrasonic dispersion, then adding phanerochaete chrysosporium spore suspension, conducting uniform mixing, adding obtained mixed solution to calcium chloride solution dropwise for hardening, and conducting shake cultivation on embedding spheres obtained after hardening so as to obtain the photocatalysis bio-adsorbent finally. The photocatalysis bio-adsorbent has the advantages of being high in photocatalysis capacity, high in adsorption efficiency, low in cost, convenient to separate and recover and the like. The photocatalysis bio-adsorbent can be used for treating composite waste water containing cadmium and 2,4,6-trichlorophenol, the heavy metal cadmium and the organic pollutant 2,4,6-trichlorophenol in waste water can be removed at the same time, and adsorption degradation efficiency is high.
Owner:HUNAN UNIV

Phenolic hydroxyl modified adsorption resin and application thereof

InactiveCN104607158AImprove adsorption efficiencyHigh adsorption selectivitySugar derivativesOther chemical processesPolymer chemistryPhenol Compound
The invention provides phenolic hydroxyl modified adsorption resin which is a grafted chloromethylated polyphenylene diene-divinyl benzene microsphere containing a phenolic hydroxyl group, and the content of the phenolic hydroxyl group is 1.50-2.86 mmol/g. The invention also provides application of the phenolic hydroxyl modified adsorption resin to the separation and the purification of stibene glucoside in polygonum multiflorum. According to the phenolic hydroxyl modified adsorption resin, the phenolic hydroxyl group is introduced onto the chloromethylated polyphenylene diene-divinyl benzene microsphere, so that the adsorption efficiency and the selectivity of the phenolic hydroxyl modified adsorption resin for the stibene glucoside in the polygonum multiflorum are improved; a technical support is provided for efficient separation and purification of the stibene glucoside in the polygonum multiflorum and other phenolic compounds. The phenolic hydroxyl modified adsorption resin has high selectivity, high adsorption capacity, high absorption efficiency and high resolution efficiency for the stibene glucoside in the polygonum multiflorum, and a high-purity stibene glucoside monomer component can be obtained through separation; the grafting ratio reaches 85.7 percent.
Owner:CHONGQING UNIV

Preparation method and application of fly ash defluorination agent

The invention relates to the field of preparation of defluorination agents, and concretely relates to a preparation method and an application of a fly ash defluorination agent. The preparation methodof the fly ash defluorination agent comprises the following steps: fully mixing fly ash with clay; adding water, granulating the obtained mixture to prepare ceramsite, and drying the ceramsite; placing the dried ceramsite in a kiln, heating the kiln to 200-300 DEG C, keeping the temperature for 5-30 min, continuously heating the kiln to 950-1150 DEG C, keeping the temperature for 5-30 min, naturally cooling the obtained ceramsite, and taking out the ceramsite; and immersing the sintered ceramsite in an acid, alkali or salt solution, filtering the immersed ceramsite, and drying the filtered ceramsite to obtain the fly ash defluorination agent. The preparation method has the advantages of recycling of the industrial waste solid fly ash, low raw material cost and great social benefits. The fly ash defluorination agent has the advantages of good adsorptivity, high fluorine ion adsorption efficiency and large adsorption capacity. The fly ash defluorination agent can be used as an adsorbentfor a simple water treater, and can adsorb fluorine ions after being directly added to high-fluorine water and stirred.
Owner:XILINGOL VOCATIONAL COLLEGE

Preparation method of adsorbing material for removing anions in water and application of adsorbing material

The invention discloses a preparation method of an adsorbing material for removing anions in water and application of the adsorbing material, and belongs to the technical field of sewage purificationtreatment in environmental protection. A chitosan acetic acid solution is taken as a material, liquid paraffin is taken as an organic dispersion medium, glutaric dialdehyde is taken as a crosslinkingagent, and a crosslinking chitosan microsphere is obtained through an emulsion crosslinking method. A crosslinking chitosan microsphere adsorbing agent prepared by adopting the method has good adsorption performance and cyclic utilization performance to iodine ions. Furthermore, the adsorbing agent also can adsorb other halide ions and oxyacid radical-containing ions and has great adsorption capacity. The adsorbing material prepared by the preparation method disclosed by the invention provides a new technical reference for removing anions in wastewater and has good recovery and cyclic utilization effects. The raw materials required for the adsorbing material are natural, nontoxic, universal and easily available, and the adsorbing material is low in price, simple in preparation process, high in treatment efficiency, short in treatment period and convenient for regenerated treatment and is an effective adsorbing agent for treating anions in wastewater.
Owner:DALIAN UNIV OF TECH

PS/Fe3O4/graphene composite aerogel and preparation method thereof

The invention discloses a PS/Fe3O4/graphene composite aerogel and a preparation method thereof. The preparation method comprises the following steps: carrying out ultrasonic dispersion on graphite oxide (GO) to form a dispersion, adding ethylene diamine and Fe3O4, carrying out ultrasonic dispersion until uniformity, sealing the obtained solution, carrying out water bath heating, freeze-drying the obtained solution to obtain a non-compressive Fe3O4/graphene composite aerogel, carrying out microwave radiation under vacuum conditions to obtain compressive Fe3O4/graphene composite aerogel, and carrying out PS hydrophobic modification to obtain the PS/Fe3O4/graphene composite aerogel. Fe3O4 nanoparticles are used as a magnetic response material, so multifunctional composite aerogel which can mechanically and magnetically recovered is simply and efficiently prepared. The cheap and environmentally-friendly PS is used to super hydrophobic modification in order to prepare a super oil absorption material with the oil adsorption performance being high and reaching 30 times, and the material can be repeatedly multiply used after being mechanically or magnetically recovered, and has a very good adsorption effect on large-range overflow oil and water surface oil stains.
Owner:NANJING UNIV OF SCI & TECH
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