813results about How to "Increased degradation rate" patented technology

Preparation method and application of polycaprolactone / natural polymer composite porous scaffold, method: including preparation of polycaprolactone electrospun nanofiber membrane; (1) placing polycaprolactone electrospun nanofiber membrane in alkaline solution reaction, soaking and rinsing in deionized water; (2) putting the fiber membrane obtained in (1) into DMTMM or natural polymer solution of DTMMM to react, immersing and rinsing in deionized water, and then immersing in natural polymer for room temperature reaction, to remove Ionized water soaking and rinsing; (3) Evenly coating and casting the mixed solution of natural polymer materials on the fiber membrane obtained in (2), freeze-drying, and extracting the solvent; (4) Applying the double-layer scaffold obtained in (3) After soaking in the cross-linking room temperature reaction, soaking in deionized water, rinsing, and freeze-drying. The porous scaffold prepared by the invention is stable, has suitable pore diameter, good biocompatibility and fast degradation rate, and can be used for skin and clinical tissue and organ defect repair, reconstruction or wound dressing.

Disclosed is a technique for processing organic waste water, including the following steps: (a) preprocession: pour the waste water into the micro electrolytic reducing pool where the iron-carbon micro electrolytic reaction occurs under the agtatering effect, add hydrogen peroxide into it to have. Fento oxidation, then the water enters into coagulation pool into which add NaOH and PAM; (b) anaerobe hydrolysis oxidation procession: power the organic waste water preprocessed into high effective anaerobe hydrolysis oxidation pool in which add into the TCBS reactor in which add into high effective compound microbe, making the water mix with the flowing-back mud with high density after denitrification. The invention can increase the biochemical of organic waste water, strengthen its resistance to poison and impact as well as the biological denitrification funcation, and making the waste water reach the national environment protection requirement by reducing the polluting load by steps.

The invention relates to a method for preparing a double-component metallic oxide catalytic ozonation catalyst. The method is characterized in that, after being activated, gamma-Al2O3 microballoon is soaked in mixed liquor of manganous nitrate and cerous nitrate, and then after drying and roasting, the loading type manganese and cerium double-component composite catalyst is prepared. The catalyst has high catalytic activity, is applied in organic pollutant degradation through catalytic ozonation, remarkably fastened in degradation rate compared with degradation using ozone singly or using unloaded gamma-Al2O3 microballoon, greatly improved compared with loading catalyst using single component of manganese or cerium and capable of reducing input amount of ozone, and according saves operation cost. Simultaneously, the catalyst has the advantages of being simple in preparing method, low in cost, stable in catalytic performance, capable of being repeatedly used and the like and is favorable for popularization and application of the catalytic ozonation technology.

The invention relates to an ozonization water treatment method using a manganese dioxide one-dimensional nano material as a catalyst. The invention provides a preparation method and a using method of the nano-catalyst, which belong to the technical field of water treatment and environmental catalysis. Manganese dioxide nano rods are obtained by a simple and convenient hydrothermal method and the manganese dioxide nano rods serving as the catalyst are added into a phenol wastewater-containing ozonization water treatment system to contribute to the degradation of phenol organic pollutants, so that a novel ozonization water treatment method is provided on the basis. The obtained manganese dioxide one-dimensional nano material has the characteristics of small dimension, high dispersibility, high separability and wide application prospect in ozonization water treatment.

The invention relates to a preparation method of a catalyst, in particular to a preparation method of a load-type metallic oxide ozone catalytic oxidation catalyst, which is characterized by comprising the following steps of (1) selecting ceramic filter bulbs to serve as a carrier, washing through deionized water, soaking for 24h by using diluted hydrochloric acid, and washing through the deionized water to effluent neuter for stoving; (2) dipping for 24h in nickel nitrate solution with the concentration of 0.1-1.0mol / L and drying; (3) roasting for 5h in a muffle furnace at 500 DEG C to obtain roasting objects; and (4) washing through the deionized water and stoving to obtain the load-type metallic oxide ozone catalytic oxidation catalyst. The preparation method is simple, low in cost, capable of greatly improving oxidation rate and efficiency of ozone on organic pollutant, good in product stability and capable of repeatedly using, and having important significant on application and dissemination of catalytic ozonation techniques.

The invention discloses a disposable controlled completely-degradable plastic packing bag, which is formed through melting, blending, extruding and film-blowing of components comprising in parts by weight: 20 to 45 parts of polyvinyl alcohol, 72 to 87 parts of starch, 10 to 20 parts of micromolecule plasticizer, 0.2 to 2 parts of modified inorganic nanometer additive, 0.1 to 1.5 parts of antioxidant, 0.5 to 3 parts of compatibilizer, 8 to 15 parts of inorganic filler, 0.1 to 1 part of ultraviolet absorber, and 0.1 to 1 part of pigment. The invention further discloses a preparation method of the plastic packing bag. The nanometer composite modifier in the packing bag adopts a micromolecule plasticizer easy to form a hydrogen bond with the starch, a certain amount of inorganic nanometer additives subject to surface treatment are added in the packing bag, so that after PVA (polyvinyl acetate) is modified by the nanometer composite modifier, the use amount of the molecule plasticizers is reduced greatly, the cost is lowed, the reduction of the mechanical property of a film is avoided, and the controlled completely-degradable film with excellent mechanical property and the use performance can be obtained.

The invention discloses a processing craft with rice straw or corn or sorghum straw to produce industrial alcohol, which comprises the following steps: pressing the rice straw and straw to brick; disposing with 60Co-gama ray of 0.5-2.0X106Gy or electron-beam accelerator; grinding with mechanical; screening through 200 order sieve; leaching with hot water; stripping lignin with alcohol; degrading enzyme; separating 1-2 mu m cord hole film; synchronous-saccharifying saccharomyces cerevisiae and pichia; dispersing and yeasting; dewatering and separating the alcohol; getting the product.

The invention discloses a complete biodegradation foam material and a preparation method thereof; the complete biodegradation foam material mainly comprises polyhydroxy alkanoate, starch and foaming agent; the complete biodegradation foam material is characterized in that: the complete biodegradation foam material does not comprise polylactic acid, and 20-80 parts of the polyhydroxy alkanoate, 20-60 parts of starch and 0.5-5 parts of the foaming agent are included by weight. The foam material takes the starch and the polyhydroxy alkanoate as main raw materials, has good physical properties, can carry out complete biodegradation and greatly reduces the manufacturing cost of the foam material.

The invention provides a method of degrading dye wastewater by an iron-based amorphous alloy / hydrogen peroxide Fenton-like system. The method is characterized by comprising the following steps: inputting iron-based amorphous alloy ribbon slices and hydrogen peroxide into the dye wastewater; then mixing and stirring, wherein the weight ratio of the dye wastewater and the iron-based amorphous alloy ribbon slices is 100:1, the mass fraction of H2O2 in hydrogen peroxide is 20-30%, and the molar concentration of H2O2 in the dye wastewater is 10-20mmol / L. According to the method of degrading dye wastewater by the iron-based amorphous alloy / hydrogen peroxide Fenton-like system provided by the invention, the dye is initially degraded to Fe<2+> by reducing action of the iron-based amorphous alloy to accelerate growth of OH. free radicals which further oxidize and degrade macromolecules of the dye to micromolecules, and finally, the micromolecules are mineralized to CO2 and H2O. The method is high in degradation rate and thorough in reaction.

The invention relates to a fully-degradable high-barrier composite material for flexible package, which is mainly prepared by blending the following components in parts by weight: 100 parts of a biodegradable matrix resin, 0-30 parts of an inorganic filler, and 0.1-15 parts of auxiliary agent; preferably, the composite material is formed by double-layer co-extrusion compounding of an inner layer biodegradable matrix resin and an outer layer biodegradable matrix resin; the inner layer biodegradable matrix resin is prepared from the following components in parts by weight: 10 to 90 parts of PBAT, 10 to 90 parts of PCL and 0.1 to 5 parts of an auxiliary agent, and the total weight part of PBAT and PCL is 100 parts; the outer layer biodegradable matrix resin is prepared from the following components in parts by weight: 10 to 90 parts of PBAT, 10 to 90 parts of PLA, 1 to 20 parts of an inorganic filler and 0.1 to 8 parts of an auxiliary agent, and the total weight part of PBAT and PLA is 100 parts, and the inorganic filler is nano calcium carbonate or talcum powder.

The invention discloses an enzyme-bacterium duplex straw decomposing agent and its preparation and application methods. The decomposing agent is made by mixing a composite microbial agent and a composite enzyme agent in a weight ratio of 3-4:1. The composite microbial agent includes Trichoderma viride, Aspergillus niger, Aspergillus oryzae, Brevibacillus laterosporus and a fused Saccharomyces cerevisiae, having a weight ratio of (1-2):(1-2):(1-2):(2-3):(2-3). The composite enzyme agent includes cellulase produced by the fermentation of Trichoderma reesei, hemicellulase produced by the fermentation of Bacillus subtilis, and ligninase produced by the fermentation of Pleurotus ostreatus, having a weight ratio of (1-2):(1-2):(1-2). The decomposing agent has a double straw degrading function, allowing more efficient and more thorough biological degradation, increasing the straw degrading speed to a higher extent and shortening degrading time, and can fully decompose crop straw to fields within about a week, without affecting the planting and transplanting of next-stubble crops.

The invention discloses imitated extracellular matrix injectable in-situ hydrogel and a preparation method and application thereof. The hydrogel is prepared by carrying out a cross-linking reaction between sulfhydrylation gelatin, sulfhydrylation polysaccharides or RGD-containing cell adhesion peptides and polyethylene glycol diacrylate. The composition of the hydrogel is similar to that of the extracellular matrix, so that the hydrogel has high biocompatibility, has the effects of controlled degradation, controlled release and / or cell behavior regulation in performance and can conveniently meet the requirements on different release rates of growth factors or medicines. Meanwhile, the clinical injectable and in-situ forming operation requirements can be met, and the hydrogel has good application prospects in tissue repair and regeneration.

The invention discloses a fully-biodegradable foaming material, which is characterized by being prepared from 100 weight parts of fully-biodegradable resin, 1 to 40 weight parts of plasticizer and 0.5 to 10 weight parts of foaming agent. The foaming material has high ductility, elasticity and wearing resistance.

The invention discloses a method for treating nitrobenzene wastewater. The method is characterized by including the steps that the wastewater with the COD content of 5,000-30,000 mg / L is added to inorganic acid for acidification; an electrolyte is added to supernatant of the acidified wastewater, and the mixture enters an electro-catalysis advanced oxidation tank to be electrolyzed; the mixture continues to enter an electro-Fenton tank to be electrolyzed to generate Fe2+, the mixture enters a Fenton oxidation tank, hydrogen peroxide is added, and a Fenton reaction is generated; a flocculating agent is added for settling, and the supernatant enters a biochemical system to be treated. The electro-catalysis advanced oxidation technology and an electro-Fenton oxidation method are adopted and combined, the wastewater is treated and modified through an electro-catalysis oxidation method, the iron dissolution amount can be greatly reduced through the electro-Fenton oxidation method, the adding quantity of H2O2 can be reduced, energy consumption and cost are reduced, and the method is environmentally friendly and economical.

The invention provides composite photocatalytic fibers and a preparation method thereof. The preparation method includes: spinning a composite light catalyst and polyester polymer to obtain precursor fibers; performing exposing treatment on the composite light catalyst in the precursor fibers to obtain the composite photocatalytic fibers. The composite photocatalytic fibers have the advantages that the polyester polymer and the composite light catalyst are used as the raw materials, the raw materials are spun into the precursor fibers, and then the composite light catalyst in the precursor fibers is exposed to allow the fibers to have photocatalytic activity; experiment results show that the sulfaquinoxaline degradation rate of the composite photocatalytic fibers is quite high, and all sulfaquinoxaline can be degraded in about 2.5 hours; a circulation cycle lasts 5 minutes, and the composite photocatalytic fibers can still keep good degradation activity after 15 circulations.

The invention discloses a microbial preparation which comprises pseudomonas stutzeri, bacillus subtilis, lactobacillus, alcaligenes faecalis and aspergillus niger. The invention further discloses a preparation method of the microbial preparation and a method of strengthening the biochemical water treatment effects by the microbial preparation. The pseudomonas stutzeri, the bacillus subtilis, the lactobacillus, the alcaligenes faecalis and the aspergillus niger in the microbial preparation can form dominant bacterial communities in a sewage treatment system, strengthen the treatment effects of COD (chemical oxygen demand) and the like in sewage, and particularly can form advantages in a printing and dyeing sewage treatment system after matching with aniline-degrading bacteria and aerobic denitrifying bacteria, so that printing and dyeing sewage COD, aniline, chroma and total nitrogen are rapidly degraded in a targeted manner, and the printing and dyeing sewage treatment effects are strengthened.

The invention discloses a soilless plant cultivation substrate and a preparation method thereof. The preparation method of the cultivation substrate disclosed by the invention comprises the following steps: firstly, uniformly mixing agricultural and forestry waste, water, a fermentation catalyst, a fermentation fungicide, bamboo vinegar and / or pyroligneous liquor to carry out fermentation treatment for the first time to prepare a first fermentation substrate; and then, adding the fermentation catalyst, the water, the bamboo vinegar and / or the pyroligneous liquor into the first fermentation substrate to carry out fermentation treatment for the second time to obtain the soilless plant cultivation substrate, wherein the fermentation catalyst comprises rhamnolipid. The plant cultivation substrate prepared by the preparation method disclosed by the invention is balanced in nutrition, high in nutritional ingredient content, reasonable in structure, stable in physical property and convenient for being absorbed by plants, satisfies plant growth needs, improves survival rate for plant cultivation and ornamental effect.

The invention provides chlorobenzene degrading bacteria, namely Ralstoniapickettii H2 which can high efficiently degrade chlorobenzene and derivative thereof. The Ralstoniapickettii H2 is preserved in the China Center for Type Culture Collection (CCTCC); the address is Wuhan University of Mountain Lojia in Wuhan City, in Hubei Province, 430072; the preservation data is Nov.4, 2009; the preservation number is CCTCC No: M 209250. The invention has the effects of providing a strain which can high efficiently and rapidly degrade chlorobenzene compound; the strain has certain broad spectrum in degrading pollutants, has higher efficient degrading capacity to chlorobenzene, has certain broad spectrum in degrading chlorine aromatic compound and derivative thereof, and has good application prospect in biological purification of industrial waste gas and wastewater.

The invention relates to magnetic graphene oxide composite material immobilized horse radish peroxidase as well as a preparation method and application thereof, belonging to the technical field of inorganic materials and analysis. The preparation method comprises the steps of firstly preparing a magnetic polymer microsphere containing 6-arm polyethylene glycol amide (6-arm-PEG-NH2) from magnetic graphene oxide GO-Fe3O4 and 6-arm-PEG-NH2, immobilizing horse radish peroxidase, and degrading pollutant phenol by virtue of immobilized horse radish peroxidase. The synthetic process of the material is reasonable in design, and the carrier material is coupled with zymoid catalytic activity of graphene oxide and high density amino functional groups on the surface of a multi-arm polymer 6-arm-PEG-NH2, so that the activity and reutilization capacity of immobilized horse radish peroxidase are effectively improved; furthermore, the degradation velocity of prepared immobilized horse radish peroxidase is obviously higher than the degradation velocities of free enzyme and a carrier material.

The invention discloses a method for preparing a catalyst and a water treatment method for catalyzing ozone oxidization by utilizing the catalyst and relates to a method for preparing a catalyst and a water treatment method. The invention solves the problem that sludge left after sewage treatment occupies vast land and causes pollution to the environment. The method for preparing the catalyst comprises the following steps of: after drying, pulverizing and screening the sludge, charging the sludge into a zinc chloride aqueous solution; standing and removing supernatant liquor; and after insulating heat of particle sludge in a muffle furnace, rinsing respectively with hydrochloric acid and deionized water and drying to obtain the catalyst. The water treatment method comprises the following step of charging water treated by a flocculating pond, a settling pond and a filter pond or sewage treated by a settling pond I, a biological pond and a settling pond II into a reactor in which ozone and the catalyst are added, for treating. The invention provides the ozonization catalyzing catalyst with the characteristics of low cost, efficient catalysis, less dissolving amount and large specific surface area while the sludge problem is solved. The catalyst of the invention can improve the removal efficiency of ozone on organic pollutants in water.

The invention relates to a microwave electro-Fenton method for processing organic wastewater and a device thereof. Under the action of microwave, a boron-doped diamond film electrode is used as an anode material for electrochemical degradation processing, and organic pollutant containing wastewater is processed efficiently by an electrochemical method. According to the invention, the boron-doped diamond film electrode is utilized to continuously generate hydroxyl radical with strong oxidation capacity in a wastewater system containing divalent iron ions, and in-situ activation of the boron-doped diamond film electrode is carried out by means of thermal effect and non-thermal effect of microwave so as to increase activity of the electrode and promote mass transfer process during the degradation process of organic pollutants. Therefore, the oxidation capacity of the electro-Fenton reaction is enhanced, and mineralization reaction rate is effectively accelerated. In comparison with traditional Fenton and electro-Fenton methods, the processing effect of the microwave electro-Fenton method provided by the invention is effectively enhanced. The method provided by the invention is simple to operate, has a good effect of processing organic wastewater, and has a wide application prospect as well as development potential.

The invention discloses a water ozonization treatment method by taking a cerium oxide nanomaterial as a catalyst. According to the method, different cerium oxide nanomaterials are prepared by adjusting and controlling the synthesis reaction conditions, and are taken as catalysts for adding into a water ozonization treatment system of phenol containing waste water, so that the degradation of phenol organic pollutants is facilitated. On the basis, a novel water ozonization treatment method is provided. The method belongs to the technical fields of water treatment and environmental catalysis. The prepared cerium oxide nanomaterial has the characteristics of small size, high dispersity in a water solution system, easiness for separation and recovery and the like, and has a wide application prospect in the application of water ozonization treatment.

The invention is a kind of regeneration method of active carbon for processing phenol waste water, which uses metal / active carbon sorption agent which carries some catalyst activity components, when it is absorbed and saturated, dries the sorption agent system under normal temperature, then carries on gas phase constant temperature oxidization, oxides and decomposes the organic contamination material, thus the active carbon can be regenerated, the merits of the invention is that it can be carried on under low temperature, reduces the energy consumption of regeneration process; it uses proper oxidization temperature and time, it can reduces the loss of the active carbon, increase the circular utilization of active carbon.

A bimetal catalyst for degradating the CCl4, trichlorothene and tetrachloroethene is sewage within one hour is composed of the modified zeolite as carrier and the bimetal Fe-Ni in the mass ratio of (1-10): 100. Said bimetal Fe-Ni is prepared by using sodium dithionite as reducer to reduce the Ni ions on the surfaces of Fe filings.

The invention discloses bismuth oxybromide particles with a three-dimensional flower-like microstructure and a preparation method and use thereof, which belong to the technical field of visible-light catalyst. The bismuth oxybromide powder has a three-dimensional flower-like microstructure of which the diameter is 1 to 5 micrometers, and the specific surface area of the bismuth oxybromide powder is 11.2 to 27.9m<2> / g. In the preparation method, mixed solution of glycol and isopropanol is used as a solvent, a bismuth salt and hexadecyl trimethyl ammonium bromide are used as a bismuth source and a bromide source respectively, the bismuth salt and hexadecyl trimethyl ammonium bromide are dissolved in the mixed solution of the glycol and isopropanol according to a Bi to Br ratio ranging from 1:1 to 1:4, the mixed solution is filled in a closed reaction kettle, the reaction kettle is placed in an oven at 120 to 160 DEG C for reaction for 6 to 24 hours, the obtained product is washed, centrifuged, dried and roasted in a muffle furnace at 250 to 450 DEG C for 4 to 6 hours, and finally the bismuth oxybromide is obtained. The obtained product has high photocatalyzing performance. The method is simple and convenient, the period is short, the raw materials are readily available, and the method meets the requirements for batch production.

The invention relates to the field of ultrasonic catalysis, in particular to a method of catalyzing and degrading organic pollutants via ultrasound wave in the condition that solid-phase catalyst exists. Oxide compound type solid-phase catalyst loaded with metal nanometer particles and water solution containing the organic pollutants are placed in an ultrasonic generator, and the organic pollutants are led to be degraded and mineralized under ultrasound wave radiation. The invention uses the oxide compound type solid-phase catalyst loaded with metal nanometer particles, which can lead the efficiency of degrading organic pollutants via ultrasound wave to be improved greatly. The method of the invention is capable of being used for treating organic wastewater.

The invention discloses a degradable plastic film and a preparation method thereof. The degradable plastic film is prepared from the following raw materials: 47-62 parts of thermoplastic polyurethaneresin, 10-25 parts of modified polylactic resin, 7-15 parts of polyvinyl alcohol, 7-10 parts of a plasticizer, 5-8 parts of inorganic filler, 5-8 parts of maltodextrin, 2-5 parts of chitosan oligosaccharide and 2-5 parts of lignocelluloses. The preparation method includes: adding the raw materials into a high-speed mixer for uniform mixing, then performing extrusion and granulation by a single screw extruder, and then conducting blowing molding or tape casting, thus obtaining the degradable plastic film. The degradable plastic film obtained by the invention is completely biodegradable and pollution-free, can achieve a degradation rate of 98% within 3-4 months, has the characteristics of excellent toughness, wear resistance, mechanical properties and thermoplastic processing properties, safety and environmental protection.

The invention discloses a biodegradable bionic fishing bait material and a preparation method thereof and relates to the technical field of artificial fishing baits. A main raw material of the biodegradable bionic fishing bait material is a blend of two or a plurality of types of degradable thermoplastic materials, such as polyurethane (TPU), polyhydroxyalkanoate (PHA), polylactic acid (PLA), polyhydroxypropionic acid-glycolide (PLGA) and capryl glycol polycitrate (POC); an environment-friendly plasticizer is one or more of a compound of citrate, isosorbide, epoxidized soybean oil and the like; feeding characteristics of fish varieties are matched with a plurality of types of fish attracting components including corn starch, a plurality of types of amino acids, minerals, protein and the like, and an antioxidant for a bionic fishing bait, and the components are blended and granulated; a mixture is subjected to injection molding to obtain the bionic fishing bait with various colors and fish, shrimp and insect shapes. The bionic fishing bait prepared by the invention has advantages of a food fishing bait and the bionic fishing bait, and has a great attraction force on the taste senseof fishes; a product is adjustable in hardness and can be completely biodegraded, and is an ecological environment-friendly bionic fishing bait for attracting the fishes.

The invention discloses a method for efficiently repairing composite polluted soil by an artificial ecological system. Scientific allocation is conducted according to different latitudes and longitudes, different temperature and humidity and different coastal pollution types. The ecological system of trees, shrubs, vines, herbaceous plants and benthonic animals is artificially constructed, and a unique sediment microbial community is naturally formed, so that heavy metal and organic pollutants in the polluted soil are quickly and effectively adsorbed and transformed by microorganism and are adsorbed and extracted by plants, and the effect of efficient purifying of the soil is achieved by artificially harvesting aboveground vegetation. According to the method for efficiently repairing the composite polluted soil by the artificial ecological system, the ecological system suitable for any soil pollution repairing can be derived in the case of scientific species configuration and the method has good ecological benefits and economic value. The maximization of the ecological benefits and repairing efficiency is ensured, meanwhile, repairing cost is reduced, and certain economic benefits can be produced.

The invention provides a kind of composite material for making a degradable ureteral stent, comprising: 60-98% by weight of L-lactide / Epsilon-caprolactone copolymer, and 2-40% by weight of polyvinylpolypyrrolidone. The L-lactide / Epsilon-caprolactone copolymer in the composite material is elastomeric material with good biocompatibility, and the polyvinylpolypyrrolidone can reduce a surface friction coefficient of the prepared degradable ureteral stent, and simultaneously raises the degradation speed of the degradable ureteral stent. The invention also discloses a degradable ureteral stent prepared by the composite material. The degradable ureteral stent has good biocompatibility, is easy to degrade, and can be used in an operation in urinary surgery.