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686results about How to "Adsorptive" patented technology

Magnetic submicron composite core-shell particles, and preparation method and application thereof

The invention discloses magnetic submicron composite core-shell particles. In the magnetic submicron composite core-shell particles, Fe3O4 particles with the particle size of between 80 and 800nm are taken as a magnetic core, amorphous SiO2 is taken as an immediate shell layer and a substance with heavy metal absorption performance is taken as an outer shell layer. The invention also discloses a preparation method for the magnetic submicron composite core-shell particles. The preparation method comprises the following steps of: preparing the Fe3O4 particles with the particle size of between 80 and 800nm by a solvothermal method and taking the Fe3O4 particles as magnetic cores, performing alkaline hydrolysis of a silicon source reagent on Fe3O4 and dehydrating and condensing hydroxy groups so as to obtain amorphous SiO2 immediate shell layers, and coating the substance with heavy metal absorption performance on obtained submicron spheres under chemical or physical action to obtain the magnetic submicron composite core-shell particles. The submicron material has high performance of absorbing heavy metal ions in the sewage; and the material has stable characteristics, can be magnetically recovered and meets environmental protection requirements, and secondary pollution is avoided.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI

Fertilizer for saline-alkali soil and preparation method of fertilizer

The invention relates to a fertilizer for saline-alkali soil. The fertilizer is prepared from the following raw materials in parts by weight: 5-20 parts of humic acid, 0.3-1 part of microorganisms, 6-16 parts of farmyard manure, 15-40 parts of straws, totally 5-10 parts of calcium superphosphate, ferrous sulfate, coal ash, furfural residues and flue gas desulfurization gypsum, 6-14 parts of a nitrogen fertilizer, 2-4 parts of a phosphatic fertilizer and 2-3 parts of a potassic fertilizer. The invention further relates to a preparation method of the fertilizer for saline-alkali soil. The fertilizer for saline-alkali soil, which is provided by the invention, has the beneficial effects that the fertilizer for saline-alkali soil has the characteristics of being low in cost and simple in preparation method, can be used for effectively improving the condition of saline-alkali soil, reducing the content of salt of soil and the pH value and increasing the content of organic matters in soil, and is particularly suitable for being applied to the saline-alkali soil.
Owner:瑞昊(北京)环境工程集团有限公司

Boron-modified organic silicon resin high-temperature-resistant coating and preparation method thereof

The invention discloses a boron-modified organic silicon resin high-temperature-resistant coating which comprises the following components in percentage by mass: 45%-58% of boron-modified organic silicon resin, 35%-45% of heat-resisting pigment fillers and 2%-4% of auxiliary agents, wherein the boron-modified organic silicon resin is boric-acid-modified organic silicon resin or epoxy-modified silicon-boron resin; and the mass ratio of nanometer silicon dioxide to barrier function fillers to aluminum powder which are contained in the heat-resisting pigment fillers is 1.5:1:1. The invention also discloses a preparation method of the boron-modified organic silicon resin high-temperature-resistant coating. The preparation method disclosed by the invention can be implemented on an existing coating preparation production line without increasing equipment investment; the prepared high temperature-resistant organic silicon coating can be coated by adopting a spray coating process and constructed by adopting a roll coating process, can be subjected to high temperature of 800 DEG C for a long time and has corrosion-resistant property.
Owner:JIANGSU MARINE VICTORY COATING

Integrated type ecological floating bed and water body ecological system repairing technology thereof

The invention discloses an integrated type ecological floating bed and the water body ecological system repairing technology thereof. A physical space of the integrated type ecological floating bed is formed by constructing a floating bed, a sinking bed, a buoyancy adjusting bottle, a lifting chain and an ecological barricading net, and integrates ecological components such as indigenous emergent aquatic plants, submerged plants, attached aquatic plants, fishes, snails and biochemical zeolite. The ecological behaviors of the ecological components are in linear cause and effect relation. The ecological components and organisms in the physical space form a semi-enclosed ecological subsystem with integral completeness. The upper line and the water body ecological system to be repaired are strong in coupling capability, and ecological factors in the lower line can exist stably. The damaged water body ecological system sufferring from one or a plurality of types of pollutions including water body eutrophication, heavy metal pollution, organic pollution and the like can be repaired by building pioneer communities and utilizing self-cleaning capability of the ecological system, pollution is removed, integral restoration or rebuilding of the damaged water body ecological system is promoted, simultaneously environment is beautified, and ecological deterioration of a healthy water body can be prevented.
Owner:HUNAN UNIV

Apparatus and process for clarifying water efficiently

InactiveCN101073715AReduce lossesNo short flowSedimentation separationSiphonSludge
The invention is concerned with a kind of high efficiency water treatment equipment and technology belonging to water treatment field. The middle parts of the equipment are two flocculating rooms having mesh setting with disturbing flow, and the bottom of the flocculating room is precipitation tank. The suspending layer of active mud residue is out of the flocculating room and there is slanting pipe on top of it and concentrate room under it. The pipe excluding residue sets in the suspending layer of active mud residue, and the bottom of clean tank is filler to exclude residue, and there is siphon pipe connecting with the filler. There are grooves excluding residue at top of the flocculating room connecting with the pipe excluding residue and the siphon pipe connects with the residue reuse tank. The filler to exclude residue connects with a pump of reused residue. The equipment gathers the small air flotation, flocculating, active mud residue layer flocculating, and reused technology. Compared with traditional mixed and coagulate deposition technology, it saves 40 percent of field, reduces 10 percent of drug and enhances 15 percent disposal efficiency.
Owner:FUDAN UNIV +1

Method for removing organic pollutants in water at ultrahigh speed

The invention relates to a method for removing organic pollutants in water at an ultrahigh speed. The method comprises the following steps: firstly, adding a reducing agent to water to be treated; secondly, adjusting the pH value of the water to be treated to be within the range of 3-7; thirdly, adding an oxidizing agent to the water to be treated. According to the method, bisulfite radicals are utilized for reacting with potassium permanganate or manganese dioxide, the removal of the organic pollutants in the water at the ultrahigh speed is realized by quickly generating a highly active oxidizing agent Mn(III) (at a non-complexing state), the rate of removing the pollutants by potassium permanganate and manganese dioxide can be improved by one thousand to one million times and is ten thousand times higher than the apparent oxidation rate of a general advanced oxidation technology, and the degradation for the pollutants can be completed in ten seconds or several seconds. According to the method, the pollutants incapable of being oxidized by potassium permanganate and manganese dioxide can also be oxidized, and even nitrobenzene capable of being oxidized by hydroxyl radicals only in traditional meanings can be oxidized, so that the oxidizing capacity of potassium permanganate and manganese dioxide is greatly improved, and the application range of potassium permanganate and manganese dioxide is expanded.
Owner:TONGJI UNIV +1

Polyvinyl alcohol/ inorganic nanocomposite hydrogel and preparation method thereof

The invention discloses polyvinyl alcohol / inorganic nanocomposite hydrogel, which is characterized by being formed by the following components: 30-90 parts by weight of polyvinyl alcohol and 0.1-20 parts by weight of inorganic nanocomposite particles through a chemical crosslinking gel method, wherein the inorganic nanocomposite particles comprise nano clay, nano mica powder, a nano molecular sieve, nano wollastonite, nano graphite, nanosilicon dioxide or a carbon nano tube. With the adoption of the polyvinyl alcohol / inorganic nanocomposite hydrogel, the mechanical strength of polyvinyl alcohol hydrogel is enhanced on the basis of not influencing the moisture of the hydrogel, the service life is prolonged, the permeability of the polyvinyl alcohol hydrogel is improved, and a channel is reserved for transmission of matters. As the selection of the materials, the production cost is controlled, and the better economic benefit is brought. The invention also discloses a preparation method of the polyvinyl alcohol / inorganic nanocomposite hydrogel. The preparation method is simple and feasible to operate and good in mechanical strength, and can be produced industrially.
Owner:CHINA PETROCHEMICAL CORP +2

Purification method of wastewater containing heavy metal and arsenic

The invention provides a purification method of wastewater containing heavy metal and arsenic. The purification method mainly comprises the process steps as follows: adding sulfuric acid or soluble sulfate into the wastewater to supplement sulfate ions; then adding a reductant to reduce high-valence manganese, chromium and vanadium in the wastewater; adding calcium carbonate to pre-adjust the pH value of the solution; adding lime for neutralization, precipitating and separating out heavy metals and harmful elements such as arsenic from the wastewater, and packaging the precipitates in gypsum slag, discharging or reusing filtered liquid after satisfying standards, and recycling filter residue. The purification method provided by the invention has the advantages of being simple in process, good in purification effect, low in cost and environment-friendly.
Owner:CENT SOUTH UNIV

Purification treatment method and apparatus for pig raising waste liquid

The invention relates to waste processing, in particular to a method and a device for purifying waste liquid from pig cultivation, which solves the problem that the waste liquid of pig cultivation pollutes the environment. After solid and liquid waste generated by pig cultivation is separated, absorption, filtration and automatic purification technology is used for enabling the separated waste liquid from pig cultivation to enter into a first absorption pool for first absorption and filtration, then filtrated liquid enters an automatic purification depositing pool for purification depositing processing and then a second absorption pool for second absorption and filtration processing, and lastly, the processed waste water reaches the standard and is discharged. The device for purifying waste liquid from pig cultivation comprises a first absorption and filtration pool, an automatic purification depositing pool and a second absorption and filtration pool which are sequentially communicated, wherein filtration material is arranged in the absorption and filtration pools, and the filtration material is only one or a plurality of layers of furnace slag, crop stems, zeolite and gravel. The invention has simple technology, low cost and easy application, and is suitable for the purification and the standard discharge of the waste liquid from family type pig farms or small pig farms.
Owner:SHENYANG INST OF APPLIED ECOLOGY - CHINESE ACAD OF SCI

Method for producing nutritive soil for practical and highly efficient soilless flower growth

ActiveCN102696462ASolve the problems of unfavorable growth and high production costRetain nutrientsAgriculture gas emission reductionCultivating equipmentsRare-earth elementAdditive ingredient
The invention discloses a method for producing nutritive soil for practical and highly efficient soilless flower growth, belonging to the agriculture flower cultivation technology field, which is characterized by taking zeolite powder, medical stone powder and perlite powder as main nutritive components, taking river sand and sawdust as auxiliary raw materials, after scientifically biological fermentation of the sawdust, producing the soil which can maintain much nutritive ingredient. A method for producing the soil includes: selecting an oblique lining grey green zeolite powder which mainly comprises silicon dioxide, aluminium oxide or the like, crushing and preparing stock with grain size of 0.2-1mm, and the pH value of 5.5-7.0; selecting the medical stone which mainly comprises the silicon dioxide, aluminium oxide, potassium oxide, sodium oxide, magnesium oxide or the like, mainly using trace elements and thirteen rare earth elements and anti-solidification effect, and crushing and preparing the stock with the grain size of 0.2-1mm and the pH value of 5.5-7.0; selecting large grain gardening perlite containing 100% pure inorganic cultivation medium and having stable physicochemical index, crushing and preparing the stock with the grain size of 0.2-1mm; selecting the sawdust after scientifically biological fermentation; selecting high quality of river sand, exposing under the sun for 1-2 days in a high temperature and preparing the stock; and fully stirring and mixing the stocks of zeolite powder, the medical stone powder, the perlite powder, the sawdust, and the river sand according to a preparation ratio of 20%, performing spray and sterilization treatment, and packaging into a product.
Owner:郭茂青

Ionic liquid precursors and their supported mesoporous materials, synthesis and applications

The invention relates to an ionic liquid precursor and a mesoporous material for supporting the ionic liquid precursor, synthesis and application. A preparation method comprises the following steps of: 1) synthesizing the ionic liquid precursor; 2) synthesizing the mesoporous material for supporting the ionic liquid precursor; and 3) acidizing or alkalifying the synthesized mesoporous material for supporting the ionic liquid precursor according to the requirements so as to obtain a target product. The loading capacity of the mesoporous material for supporting the ionic liquid precursor is relatively adjusted, and a mesoporous material for supporting functionalized ionic liquid can be obtained by further acidizing or alkalifying the material according to the requirements. The amount, strength of acid and alkali, properties, variety and the like of ionic liquid supported on the material are adjustable, so that the material can meet the demand of application such as various acid and alkaline catalytic reactions, chemical adsorption and separation and the like. By the material, the using amount of the ionic liquid is greatly reduced, the better catalytic effect is achieved when the material is applied to aldol condensation reactions, and the recycling of a catalyst can be realized. The kind of material is expected to be used for catalyzing more chemical reactions, and may be applied in the fields of adsorption, separation, ionic conductance and the like.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

High temp. and salt resistant water absorbing resin

InactiveCN1464007AKeep expansiveEasy to useSalinityPetroleum
The heat resistant and salt resistant hydroscopic resin consists of ternary copolymer of acrylic acid, acrylamide and cation monomers and laminated inorganic stuffing in the amount of 10-150 wt% of total monomer. It may be used in the conditions of 70-150 deg.c and mineralization degree 5000-100000 ppm to maintain no shrinkage and no structure damage for long period. When being used as water plugging agent, it is safe, pollution-less, non-toxic and long in effect. The heat resistant and salt resistant hydroscopic resin as one novel composite material is mainly used for hydroscopic expansion use with harsh condition, such as water blocking and oil displacement regulation in high temperature and high salinity petroleum deposit and blocking in building. In addition, it may be also used in sanitary towel and agricultural and forestry water maintaining engineering in lower production cost.
Owner:PETROCHINA CO LTD

Compound microbial agent for urban sewage treatment, preparation method and application thereof

The invention provides a compound microbial agent for urban sewage treatment. The compound microbial agent comprises a compound thallus which is compounded by bacillus subtilis, bacillus licheniformis, lactobacillus plantarum, hansenula polymorpha and saccharomyces cerevisiae. The compound microbial agent provided by the invention can be used for reasonably combining various strains capable of forming a dominant bacterial community, has a good degrading effect to macromolecules and degradation-resistant organic matters by being added into a sewage treatment system in a certain proportion, and can be used for effectively improving the biodegradability of sewage, reducing CODcr and BOD5 of urban sewage with poor biodegradability and purifying the water quality.
Owner:HANYU GRP CO LTD

Pulse helium ionized gas phase chromatographic instrument

The invention relates to a pulse helium ionized gas phase chromatographic instrument which comprises a gas carrying unit, a sampling unit, a gas path control unit, a circuit control unit, a separation unit and a test unit; the invention is characterized by further comprising a tail gas processing unit and a signal collection and data processing unit; the tail gas processing unit receives the waste gas discharged by the separation unit; the signal collection and data processing unit is a countercharge chromatograph workstation; the gas carrying unit is constructed by a solid state filter and a helium purifier to provide high purity carrying gas for the separation unit; the sampling unit is used for sampling and automatic sampling injection; the separation unit is comprises a switching procedure of three valves and four columns; the test unit is a pulse helium ionized tester. The stable path control and the circuit control parts of the invention can ensure the instrument to work for a long time and can show good response to all the impurities in the high purity gas, the measurement result can meet the gas standard requirement, the operation is simple and the whole process is in automatic control.
Owner:SHANGHAI HUAAI CHROMATOGRAPHIC ANALYSIS

Biology-breathable cosmetic mask and preparation method thereof

The invention provides a biology-breathable cosmetic mask. The biology-breathable cosmetic mask is prepared from, 1%-5% of natural polymer material, 1%-10% of wetting agent, 0.12%-0.25% of cross-linking agent, 0.1%-5% of surface active agent, 0.1%-2% of preservative, 0.01%-1% of acid-base modifier, 0.01%-30% of medicine carrying functional component and the balance distilled water. The pH value of the biology-breathable cosmetic mask is 5.5-8.0. The invention further provides a preparation method of the biology-breathable cosmetic mask. The biology-breathable cosmetic mask can be dissolved quickly and completely in hot water of above 50 DEG C and is swelled only without being dissolved after being placed in normal temperature water; however, the mask can be dissolved gradually after several hours, complete biodegradation is achieved, and no pollution to the environment is caused. The biology-breathable cosmetic mask can be either a transparent thin film or a translucent or opaque thin film.
Owner:赵勤

Three layered composite film for purifying and preventing the air and the preparing method and the application

ActiveCN101041277AAdsorptiveHas the ability to decompose harmful gasesSemi-permeable membranesLayered productsComposite filmIndoor air quality
The invention discloses a new three-layer composite film with performances of cleaning air, waterproof, air permeation and moisture permeation for building field, the preparing method and the application. In the invention micro-hole film has air cleaning performance by importing complex of photocatalyst and adsorbent in the micro-hole film and it is used as the middle layer. The micro-hole film is pressed with internal and external layers of non-woven fabrics in heat to prepare the three-layer composite film under the condition of no adhesive. The composite film of invention not only has good waterproof and air (moisture) permeation performances but also has stronger air cleaning performance and it can decompose every kinds of harmful air effectively. The composite film of invention can be used as the liner layer at the inner side of oblique roof without concrete in ecological building where the demand to air in door and circumstance is high. It can be also used as the covering film in building assembly work out of door.
Owner:宁波曦昀高分子新材料有限公司

Preparation method of carrying type lamellar bimetal composite oxide catalyst

The embodiment of the invention discloses a preparation method of a carrying type lamellar bimetal composite oxide catalyst. The preparation method comprises the steps of conducting pretreatment on a catalyst carrier; adding a divalent metal ion and trivalent metal ion mixed salt solution and a NaOH and Na<2>CO<3> mixed solution into an all-backmixing rotating liquid-film reactor simultaneously, conducting a reaction for 1-3 minutes, and obtaining mixed slurry containing lamellar bimetal composite hydroxide crystal nuclei; transferring the mixed slurry containing the lamellar bimetal composite hydroxide crystal nuclei and the catalyst carrier obtained after the pretreatment into a reaction kettle, conducting a reaction for 2-24 hours at the temperature of 60-150 DEG C, then conducting drying treatment, and obtaining a precursor of the carrying type lamellar bimetal composite oxide catalyst; conducting calcination on the precursor for 2-8 hours at the temperature of 250-500 DEG C, and obtaining the carrying type lamellar bimetal composite oxide catalyst. By means of the method, loss of active constituents in the catalyst is effectively reduced.
Owner:POTEN ENVIRONMENT GRP

Method for producing insulating bricks by utilizing aluminum-electrolyzed waste refractory materials

The invention discloses a method for producing insulating bricks by utilizing aluminum-electrolyzed waste refractory materials, relating to a recovery technology of waste refractory materials during the aluminum electrolysis production, wherein the aluminum-electrolyzed waste refractory materials are mainly various refractory material mixture in which waste cathode carbon blocks and side silicon carbide are removed. The method adopts the following raw materials in percentage by weight: 5-30% of the aluminum-electrolyzed waste refractory materials, 10-50% of fly ash or fly ash drift beads, 15-30% of a cementing agent, 1-5% of additives, 3-8% of a pore-forming agent and 10-20% of water, and the method comprises the following steps of: preparing the raw materials, mixing the raw materials, extruding the mixture to mold, drying and sintering to produce the insulating bricks; and by utilizing innocuous treatment measures, the extraction contents of fluoride and cyanide of the produced insulating bricks are lower than 50mg / l and 1.0mg / l, the smoke gas is adsorbed by an aluminum oxide, and the solvable injurant and the smoke gas of the insulating bricks both meet the national environment protection emission standard; and the produced insulating bricks can be applied to the heat insulation of various pipelines and walls at a temperature lower than 1000 DEG C.
Owner:YICHUAN LONGHAI TECH INDAL

Seedling cultivation composite organic matter basis and method of preparing the same

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.
Owner:JIANGSU XUHUAI DISTRICT HUAIYIN AGRI SCI RES INST

Novel composite water treatment material and preparation method thereof

The invention relates to a novel composite water treatment material and a preparation method thereof. The novel composite water treatment material contains tourmaline, sepiolite and graphene oxide or graphene. According to the preparation method, the graphene or the graphene oxide is wrapped on the surfaces of the sepiolite and the tourmaline by a reflux method, so the adsorptive property of the sepiolite on organic wastewater can be effectively improved by utilizing the large surface area of the graphene or the graphene oxide. The novel composite material has the characteristics of high adsorption efficiency, small using amount, energy conservation and the like, in particular, the sepiolite and the tourmaline are almost not consumed, so the treatment cost can be greatly reduced, and the dangerousness that dye molecules belonging to organic matters difficult to degrade are immersed into natural water and accumulated in the environment is avoided. Meanwhile, the graphene oxide and the graphene have good antibacterial property, so the phenomenon that activated sludge is increased too fast can be effectively improved, and considerable economic benefit, environmental benefit and social benefit are achieved.
Owner:HEBEI UNIV OF TECH

Method for preparing adsorbable oxycellulose through ramie oxidation degumming process

The invention provides a method for preparing adsorbable oxycellulose through a ramie oxidation degumming process. The method includes the steps that ramie original hemp serves as a raw material, the original hemp is smashed into short fibers through a smashing machine, and the short fibers are added with deionized water and soaked for pretreatment; a degumming solution is prepared from an oxidizing agent, a stabilizing agent, a fiber expanding agent, a penetrating agent, a chelating agent and water, the ramie original hemp and the degumming solution are mixed, gum in the ramie original hemp is fully removed by means of oxidizability of hyperoxide, and cellulose with active hydroxyl groups is oxidized into oxycellulose containing a great number of formyl groups; the oxycellulose is separated from water and dried to obtain the oxycellulose in the powder state. The method is simple in flow path, environmentally friendly, low in requirement for equipment and beneficial for large-scale production and has good economic and social benefits, the total reaction time is shortened, chemicals and cost are saved, efficiency is greatly improved, reaction conditions are moderate, and additional value of the cellulose is substantially increased.
Owner:DONGHUA UNIV

Preparation method of compound photocatalytic water purification material

InactiveCN101722030APhotocatalytic performance hasWith water purification propertiesWater/sewage treatment by irradiationMolecular sieve catalystsStone particlePollution
The invention relates to a preparation method of a compound photocatalytic water purification material, comprising the step of: fixing nanometer titanium dioxide particles of industrial finished products with the best photocatalytic performance on a micron zeolite sieve or surfaces of medical stone particles by a ball milling method to a multifunctional compound material with the photocatalytic performance and the original water purification characteristic of a carrier. The method has the advantages of simple process, lower raw material cost and no pollution to the environment in a production process, and is suitable for industrial production. The prepared compound material has wide application prospect in the field of advanced treatment of drinking water.
Owner:TONGJI UNIV

Industrial residue boiler anti-coking agent and application method thereof

InactiveCN103013617ARaise the ash melting temperatureAlleviate coking and slagging in the furnaceSolid fuelsFuel additivesPulverised fuel ashEngineering
The invention discloses an industrial residue boiler anti-coking agent and an application method thereof, belonging to the technical field of anti-coking additives. The industrial residue boiler anti-coking agent comprises the following components in percentage by mass: 30-60% of kaolin, 30-60% of CaO and 10-20% of fly ash. When in use, the industrial residue boiler anti-coking agent, accounting for 1-2% of the total mass of the industrial residue fuel, is added to the industrial residue fuel and evenly mixed. The industrial residue boiler anti-coking agent disclosed by the invention has high porosity, and the surface micropores have adsorbability; the industrial residue boiler anti-coking agent is simple to use, and the addition amount is only 1-2% of the total weight of the fuel, so that the invention does not influence the combustion characteristics of the fuel and the normal operation of the boiler, and does not need to modify the existing combustion equipment, thereby greatly lowering the investment cost.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

Attapulgite-based soil heavy metal repairing agent

The invention belongs to the technical field of environment pollution treatment, and more specifically relates to a heavy metal-polluted soil repairing agent prepared by attapulgite. The attapulgite-based soil heavy metal repairing agent is obtained by steps of raw ore fragmentation, acidifying treatment, airing screening, roasting and soil heavy metal restoration. According to the attapulgite-based soil heavy metal repairing agent through acidifying and heat modification, attapulgite clay has characteristics of large specific surface area and high porosity amount due to sulfuric acid acidifying treatment of the attapulgite clay, activity and adsorptivity are increased, proportion of soluble heavy metals in the soil can be effectively reduced, soil heavy metal passivation effect can be reached, and soil heavy metal pollution can be remediated.
Owner:LANZHOU KUNLUN ENVIRONMENTAL PROTECTION TECH

Method for preparing modified loess with high adsorption performance

The invention relates to a method for preparing modified loess with high adsorption performance. The method comprises the following steps of: (1) after stirring loess, distilled water and acrylic acid uniformly under room temperature, dropwise adding a NaOH solution with neutralization being 40-90% for neutralization to obtain a neutralization solution; (2) then adding hydroxyethyl methacrylate to the neutralization solution and stirring the materials uniformly to obtain mixed liquor; and (3) adding a crosslinking agent glycidyl methacrylate to the mixed liquor, heating the materials to 40-90 DEG C after introducing inert gases, finally adding an initiator ammonium persulfate, stirring the materials for 20-120 minutes when raising the temperature to 50-95 DEG C, thus generating a composite, and washing and drying the composite to a constant weight, thus obtaining the loess-based polymer composite adsorbent. The method has the following advantages that the natural loess is used as the raw material and is modified by acrylic acid and hydroxyethyl methacrylate to obtain the loess-based polymer composite adsorbent; and the loess-based polymer composite adsorbent is applied to treatment of wastewater containing heavy metal ions and dyes and has the characteristics of strong absorbability and large adsorption capacity.
Owner:NORTHWEST NORMAL UNIVERSITY

A preparation method of lithium sulfide battery cathode material

The invention relates to a preparation method of a lithium sulfur battery cathode material. This method uses N,N-Dimethylformamide (DMF) is use as a solvent, In-situ polyacrylonitrile (PAN) / graphene oxide (GO) was dissolved in DMF to prepare spinning precursor, Continuous nanofiber membranes were prepared by electrospinning, In-situ nitrogen doped carbon fiber / reduced graphene oxide composite wasprepared by carbonization of electrospun PAN / GO fiber, At last, the nitrogen-doped carbon fiber / reduced graphene oxide / sulfur composite cathode material is prepare by the sulfur doping process, This kind of composite material with excellent conductivity and adsorption ability for polysulfide can not only make up the disadvantage of poor conductivity of elemental sulfur but also play a role of sulfur fixation and improve the shuttle effect of polysulfide in the reaction process so as to improve the electrochemical performance of lithium sulfide batteries.
Owner:HEBEI UNIV OF TECH +1

Method for utilizing and disposing micro-electrolyzed waste residue of organic waste water and method for immobilizing arsenic and heavy metal in soil

The invention relates to a method for utilizing and disposing micro-electrolyzed waste residue of organic waste water, a method for immobilizing arsenic and heavy metal in soil and a method for utilizing and disposing micro-electrolyzed waste residue and activated sludge of organic waste water. The invention is characterized in that iron carbon is used as main filler for the micro electrolysis of the organic waste water, the waste residue (solids) produced after the micro electrolysis of the iron carbon is collected, concentrated and mixed with the activated sludge, inorganic / organic mixed restoration agent is prepared after 10-50 days of composting treatment are conducted, the weight of the iron in the restoration agent accounts for (0.5-20) percent of the total weight of the solids, finally deep tillage is conducted to restore the pollution soil after the restoration agent is evenly dispersed in soil, and the weight ratio of the restoration agent to the polluted soil is (0.1-5.0):100.
Owner:CENT SOUTH UNIV

Rapid Raman spectrum detection method for molecularly imprinted membrane

The invention relates to a Raman spectrum detection method for a molecularly-imprinted membrane (MIM) by use of a Raman spectrometer used as a detection means with the combination of a molecular imprinting technology and a membrane technology and is used for rapidly detecting target molecules-dimethylguanidine hydrochloride and the like in real time. According to the method, a piece of lens paper for an optical lens is used as a substrate (carrier), guanidine hydrochloride or 4-(2-amino ethyl) benzsulfamide is used as an imprinted template, nanogold / silver sol is added in a pre-polymerization solution, and a polymer is directly light-gathered on the lens paper, so as to be convenient to carry and detect. The addition of the nanogold / silver sol is similar to the surface enhanced raman spectroscopy in principle, the response strength of the Raman spectrum can be enhanced and the fluorescence signal interference is reduced; the molecularly-imprinted membrane after and before target adsorption is compared with a standard substance, so that the peaked change in the Raman spectrum can be observed and whether a practical sample contains a target molecule can be judged.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
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