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659results about How to "Strong persistence" patented technology

Polyurethane foam supported liver/graphene/ titanium dioxide nano particle composite material, preparation method thereof and application thereof

The invention discloses a polyurethane foam supported liver / graphene / titanium dioxide nano particle composite material, a preparation method thereof and an application thereof. The material is a three-dimensional structure which is specifically that sliver / graphene / titanium dioxide ternary nano particles are uniformly loaded in the surface and a base body of the polyurethane foam. The preparation method comprises: preparing graphene / titanium dioxide binary nano particles; adding silver nitrate to carry out silver ion modification, thereby preparing silver / graphene / titanium dioxide ternary nano particles; and finally, quickly mixing and stirring a mixed solution of the silver / graphene / titanium dioxide nano particles and diphenyl methylpropane diisocyanate with a mixed solution of polyether polyol and dichloromethane, thereby preparing the polyurethane foam supported liver / graphene / titanium dioxide ternary nano particle composite material. The material provided by the invention has strong adsorption effect, and can degrade oil pollutants on the surface of a water body under irradiation of visible light, thereby achieving great potential in surface water remediation.
Owner:HOHAI UNIV

Method and reactor for removing organic matter, sulfide, and nitrate in wastewater synchronistically

This invention relates to method and reactor for removing organic matters, sulfides and nitrates from wastewater simultaneously. The method solves the problems of high cost and easy secondary pollution faced by the present technique in treating sulfur and nitrogen-containing wastewater. The method utilizes sulfur-autotrophic denitrifying bacteria and sulfur-heterotrophic denitrifying bacteria biological membrane to treat wastewater. The reactor is a fixed bed biological membrane reactor. The filler is lava or activated carbon. A reaction zone is formed at the middle and lower part of the inner cavity of the cylinder, while a precipitation zone is formed at the upper part. A gas collection zone is formed at the middle and lower part of the inner cavity of the gas collection chamber, while a water storage zone is formed between the bottom of the gas collection chamber and the flush weir. The method has such advantages as high treatment efficiency, no secondary pollution, low running cost, and low sludge productivity. The reactor has such advantages as small floor area and easy operation. The reactor can be continuously operated, and can be solely used or used as one treatment unit for wastewater treatment.
Owner:中通环境治理有限公司

Method and system for denitrifying low-carbon high-nitrogen sewage by utilizing plant carbon source-enhanced artificial wetland

The invention discloses a method and a system for denitrifying low-carbon high-nitrogen sewage by utilizing a plant carbon source-enhanced artificial wetland. The method comprises the following steps: hydrolyzing by taking waste crops or wetland plant straws as carbon sources, and charging hydrolysate into an artificial wetland so as to improve the denitrification efficiency of the low-carbon high-nitrogen sewage. The invention simultaneously provides a treatment system, which is simple in structure, and scientific and reasonable in carbon source charging mode, and the denitrification effect of the low-carbon high-nitrogen sewage can be well realized by enhancing the artificial wetland through utilizing the plant carbon source. According to the method, the adopted plant carbon sources are cheap and easily available, the carbon release capability is strong, the bio-denitrification effect is good, and the hydrolysate is simple and practical to prepare, the carbon source charging mode is strong in continuous running capability, and the method is simple to maintain, less in secondary pollution, low in production cost, and capable of solving the technical difficulty of treating tail water in a sewage treatment plant with low carbon nitrogen ratio through artificial wetland by utilizing a simple method.
Owner:JINAN UNIVERSITY

Preparation method of super-hydrophilic thin film based on glass surface

The invention provides a preparation method of a super-hydrophilic thin film based on a glass surface, relates to the super-hydrophilic thin film, and provides the preparation method of the super-hydrophilic thin film based on the glass surface, which has the advantages of simple needed equipment, few investment, wear resistance and long durability. The preparation method comprises the steps of: preparing SiO2 sol by an acid-alkali two-step method; diluting the SiO2 sol and adding polyethylene glycol; ultrasonically oscillating and coating the SiO2 sol on a glass substrate; and sintering to obtain the glass with the super-hydrophilic thin film on the surface. The preparation method has a simple process flow and few investment; and the obtained super-hydrophilic thin film has the characteristics that 1) light irradiation is not needed and the super hydrophilicity also exists at the hard part; 2) the super-hydrophilic thin film is super-hydrophilic and durable; the super-hydrophilic glass prepared by the method is placed indoors for three months and still has the super hydrophilicity after being detected; and 3) the bonding force of the film is firm and wear-resisting; and under the laboratory conditions, the thin film on the surface of the glass is forcedly brushed by a test tube brush and the result shows that the super-hydrophilic glass still has the super hydrophilicity.
Owner:XIAMEN UNIV +1

Water base non-chrome zinc-aluminium coating and methods for preparing and using same

The invention relates to a water base non-chrome zinc-aluminium coating and methods for preparing and using the same. The coating is prepared by proportionally mixing a component A and a component B; the component A contains 50-150g/L of lamellar metal powder, 145-290ml/L of organic solvent, 10-200ml/L of deionized water, 10-36ml/L of reducing agent and 5-15ml/L of wetting agent; and the component B contains 60-240ml/L of deionized water, 20-75ml/L of binding agent, 8-22ml/L of thickening agent, 4-8ml/L of silicon compound and the balance of the organic solvent. The method for preparing the water base non-chrome zinc-aluminium coating comprises the steps of: weighing the lamellar metal powder proportionally to be mixed uniformly, and then adding the organic solvent to be mixed uniformly for later use; mixing the reducing agent with the wetting agent, adding an appropriate amount of the deionized water to be mixed uniformly, and then adding the lamellar metal powder liquid to prepare the component A; proportionally weighing the thickening agent, the binding agent and the silicon compound, and adding the organic solvent to be mixed uniformly to prepare the component B; and mixing the prepared component A and the prepared component B according to the ratio of 2:1, and stirring unit uniform, thus obtaining the coating. The method for using the water base non-chrome zinc-aluminium coating is that the coating is coated on a part to be treated, and the baking temperature is increased to 360 DEG C so as to solidify and crosslink the coating to form a dense protective layer. The coating has the corrosion resistance which reaches 840 hours of a neutral salt spray test and over 96 hours of a heat resistance test, the usage amount of harmful substances is greatly reduced, and the working environment is improved.
Owner:翊鹏(湖北)实业有限公司

Ultrasonic algal-removing boat used for water bloom emergency treatment

The invention relates to an ultrasonic algal-removing boat used for water bloom emergency treatment. The boat is loaded with an ultrasonic algal-removing device, adopts the sedimentation function of ultrasound on the blue-green algae of water to sedimentate the blue-green algae to the water bottom, is applied in the emergency treatment when the water bloom in the lake outbreaks and can reach the effect of removing floated blue-green algae on the surface of the lake. The boat of the invention comprises a catamaran (1) with an algae-laden water drainage channel (3), an ultrasonic transmitter array (2) and other parts, wherein the ultrasonic transmitter array (2) is arranged in the algae-laden water drainage channel (3) of the catamaran (1); and the ultrasonic transmitter array (2) radiates the ultrasound to act on the blue-green algae of water in the algae-laden water drainage channel (3) and ensure that the blue-green algae loses the floatability and is discharged and sedimentated to the water bottom under the action of a boat-pushing propeller (5), thus achieving the aim of removing the blue-green algae. The system is an environmental technology which adopts the ultrasonic technology to remove the blue-green algae of water body in water head site safely and economically.
Owner:SOUTHEAST UNIV

Preparation method for sodium borohydride hydrolysis hydrogen production catalyst and carrier thereof

The invention relates to a preparation method for the carrier of a sodium borohydride hydrolysis hydrogen production catalyst. The method includes: 1) adding a pore forming agent and a binder into nano-silicon carbide powder, and conducting extrusion molding into granules; 2) roasting the granular silicon carbide in inert atmosphere at 1350-1600DEG C, then conducting treatment in a 600-800DEG C muffle furnace to remove the pore forming agent; and 3) conducting surface treatment on the porous silicon carbide obtained in step 2) by one of the following ways: calcination in the air, heating reflux in nitric acid, or hydrothermal treatment, thus obtaining the silicon carbide carrier of the catalyst for production of hydrogen from sodium borohydride. The obtained carrier can be loaded with the catalyst component ruthenium to obtain the catalyst for sodium borohydride hydrolysis hydrogen production. Due to use of strong alkali corrosion resistant porous silicon carbide as the carrier, the mechanical strength is great, and the catalyst activity life is long. After fifty times of cyclic use, the catalytic activity is almost not reduced, the catalyst shows extremely strong stability and persistence, and has life exceeding the hydrogen catalyst life reported by most literatures.
Owner:EAST CHINA UNIV OF SCI & TECH
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