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3164results about How to "Improve adsorption efficiency" 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

Multifunctional three-layer type air strainer

The invention provides a multifunctional three-layer type air strainer and relates to a strainer. The multifunctional three-layer type air strainer provided by the invention is antimicrobial, self-cleaning and self-nursing, and can be used for increasing a contact area between the strainer and the air, increasing the dust absorbing efficiency, prolonging the service time for filtering, eliminating the planktonic bacteria in air, decomposing harmful matters in air and releasing anion. Three layers of strainers are arranged in the multifunctional three-layer type air strainer, wherein the three layers of strainers are overlapped in turn and then are fixed together with frames by virtue of buckles; the frames and the buckles are arranged on the peripheries of the three layers of strainers; the first layer of strainer is a nonwoven filter cloth layer, a PET (polyester) long fiber filter cloth layer, a glass fiber cloth layer or a stainless steel wire strainer cloth layer; the second layer of strainer is an active carbon strainer cloth layer or a bamboo carbon filter strainer cloth layer; the third layer of strainer is a monofilament filter cloth layer, an apocynum venetum fiber filter cloth layer or a stainless steel wire strainer cloth layer; and the three layers of strainers all contain health functional agents.
Owner:XIAMEN RUNNER IND CORP

Carbon-based composite material for arsenic and cadmium polluted soil remediation and application of composite material

The invention discloses a carbon-based composite material for arsenic and cadmium polluted soil remediation and application of the composite material. The carbon-based composite material disclosed by the invention is prepared by the steps: taking crop straws as raw materials, and charring to prepare charcoal; mixing with an iron salt solution according to a certain solid-liquid ratio, regulating the pH value of the solution in the process so as to realize coprecipitation of the two materials; performing pyrolysis, thereby obtaining the carbon-based composite material. The carbon-based composite material prepared in the invention is applied to arsenic and cadmium compound polluted soil, and methods such as turning over, watering and the like are combined, so that the content of arsenic and cadmium in an effective state can be obviously reduced; therefore, the arsenic and cadmium in the soil can be transferred to a direction with low biotoxicity and migration, the physicochemical properties of the soil can be improved to a certain degree, and the composite material is suitable to be applied to multiple types of soil. The arsenic and cadmium ions in a water body can be effectively removed, the preparation process is simple in operating steps, and the material is wide in source, low in production cost and environment-friendly.
Owner:INST OF SOIL & FERTILIZER ANHUI ACAD OF AGRI SCI

Recycling device for exhaust gas of painted organic solvent and method for recycling organic solvent

The invention discloses a recycling device for an exhaust gas of a painted organic solvent. The recycling device comprises a painting fog removing device, a fan, an absorbing jar, a condenser and an oil-water separator which are connected in turn, wherein the painting fog removing device comprises a gas collecting tank, a cyclone dust collector and a bag type dust collector; the gas collecting tank is used for temporarily storing the exhaust gas of the organic solvent; and the gas collecting tank, the cyclone dust collector and the bag type dust collector are connected in turn. All componentsof the recycling device are reasonably and compactly jointed; collection efficiency is high; and the painting fog is efficiently removed while a trouble in frequently exchanging filter cotton is avoided. The invention also discloses a method for utilizing the recycling device for the exhaust gas of the painted organic solvent to recycle the organic solvent. The method comprises the following steps: removing the painting fog; absorbing; desorbing steam; condensing; and separating oil from water, wherein the step of removing the painting fog is carried out by changing the painting fog into painting powder and then efficiently removing the painting fog. Compared with a traditional process, the method is more reasonable, compact and labor-saving.
Owner:中科天龙(厦门)环保股份有限公司

Grapheme type fiber cigarette filter and preparation method thereof

InactiveCN103005712ALarge surface atomic ratioUnique adsorptionTobacco smoke filtersFiberHazardous substance
The invention discloses a grapheme type fiber cigarette filter and a preparation method thereof. The filter comprises a fiber carrier, wherein the fiber carrier is provided with a grapheme type material for absorbing harmful components in smoke. The filter loads the grapheme type material on a carbon fiber or acetate fiber carrier; and the carrier is added in the filter by adopting the binary filter production mode in the existing industries to produce a compound filter for absorbing harmful substances in the smoke which is generated when cigarettes are smoked. The filter applies unique phi absorption characteristics and higher surface active atom ratio of novel two-dimensional nanometer materials to efficiently absorb benzo [a] pyrene, volatile aldehyde ketone type cancer promoting molecules, phenol and HCN (Hydrogen Cyanide) under the condition of smaller adding quantity, so that the filter is environment-friendly and has no additional poison; as the amount is small and the effect is high, the harm of the cigarettes to human bodies is reduced under the condition of not influencing the inherent sensory quality of the cigarettes. And at the same time, the method has the advantages of simple technique, large-scale production and low cost, and has wide application foreground in the cigarette field of harm reduction and tar reduction.

Amino-terminated modified cellulose, and preparation method and application thereof

The invention discloses amino-terminated modified cellulose, and a preparation method and application thereof. The method comprises the following steps: firstly, soaking a bagasse material which is cleaned and dried into constant weight in concentrated alkaline for over 10 hours; washing, carrying out suction filtering and drying to obtain alkaline bagasse fibers; then carrying out an oxidation reaction on the alkaline bagasse fibers and a strong oxidant in a dark condition, so as to obtain dialdehyde bagasse cellulose; with methyl methacrylate and ethanediamine as raw materials, stirring in an organic solvent under dark and oxygen-isolated conditions to carry out a polymerization reaction, so as to obtain an amino-terminated hyperbranched polymer; and finally carrying out a reflux reaction after dissolving the dialdehyde bagasse cellulose and the amino-terminated hyperbranched polymer into the organic solvent, so as to obtain the amino-terminated hyperbranched grafted dialdehyde cellulose. The modified cellulose not only has good adsorptive property on heavy metal ions in a wastewater solution, but also is easy to separate after adsorption. Thus, the amino-terminated modified cellulose has the water purification effects of simple method and low cost.
Owner:GUANGXI UNIV FOR NATITIES
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