85results about How to "Stable degradation" patented technology

A phosphite composition comprising at least two of a tris(diamylaryl) phosphite, a tris(monoamylaryl) phosphite, a bis(diamylaryl)monoamylaryl phosphite, and a bis(monoamylaryl)diamylaryl phosphite. The inventive phosphite composition is a liquid at ambient conditions.

A method for producing a colloid of metallic nanoparticles including the steps of: providing metal ions in solution; providing a stabilizing agent; and reducing said metal ions in the presence of said stabilizing agent, so that metallic nanoparticles are formed with a surrounding layer of said stabilizing agent, wherein the reduction step is carried out at a temperature of not less than 20° C. and not more than 150° C. The metallic nanoparticles are formed of a mixture of transition metal and noble metal, such as Ni—Pd. The resultant nanoparticles have a high stability in terms of size and chemical degradation and so can be stored for long periods. They are therefore particularly suited for forming patterned nanoparticle arrays on a substrate by nanocontact printing for the subsequent formation of a corresponding array of carbon nanotubes or nanofibers via plasma enhanced CVD.

A phosphite composition comprising at least two of a tris(diamylaryl) phosphite, a tris(monoamylaryl) phosphite, a bis(diamylaryl)monoamylaryl phosphite, and a bis(monoamylaryl)diamylaryl phosphite. The inventive phosphite composition is a liquid at ambient conditions.

A phosphite composition comprising at least two of a tris(dibutylaryl) phosphite, a tris(monobutylaryl) phosphite, a bis(dibutylaryl)monobutylaryl phosphite, and a bis(monobutylaryl)dibutylaryl phosphite. The inventive phosphite composition is a liquid at ambient conditions.

The invention relates to a method of synchronously stabilizing heavy metals and degrading polycyclic aromatic hydrocarbons from waste incineration fly ash. The method comprises the following steps: 1)pretreatment: grinding the fly ash, wherein the grain sizes of the fly ash are smaller than or equal to 80 [mu]m; 2) blending: adding a silicon-aluminum conditioning agent into the pre-treated fly ash to obtain a mixed ash sample, adding hot water into the mixed ash sample, and stirring and activating the mixed ash sample for 8-10 h to obtain mixed slurry, wherein the molar ratio among calcium, silicon and aluminum in the mixed slurry meets the generation demand of a zeolite aluminosilicate mineral tobermorite, and the liquid-solid ratio of water and the mixed ash sample in the mixed slurry is (5-10): 1 mL / g; 3) hydrothermal reaction: adding the mixed slurry into a closed hydrothermal reaction kettle, pumping hydrogen peroxide into the hydrothermal reaction kettle and then raising the temperature to 150-200 DEG C for the hydrothermal reaction, wherein the mass fraction of the hydrogen peroxide is 30%, and the liquid-solid ratio of the hydrogen peroxide and the mixed ash sample is 0.25-1 mL / g; and 4) separation: carrying out dehydrating separation on a product obtained by the hydrothermal reaction to obtain a solid phase product and waste liquor.

The invention discloses a preparation method of a covalent organic framework / carbon nitride composite material and application thereof. Firstly, a covalent organic framework material is synthesized byusing p-phenylenediamine and triformyl phloroglucinol as synthetic monomers through a room-temperature solid-phase method, then the covalent organic framework material and carbon nitride are mixed, stirred and dried in methyl alcohol, and pyrolysis is carried out under the protection of inert gas to obtain a target product. The covalent organic framework / carbon nitride composite material disclosed by the invention is large in specific surface area, high in nitrogen doping amount and rich in pore structure and can effectively remove toxic organic pollutants in water by constructing a novel Fenton-like system, and new application of the covalent organic framework material in the field of catalysis is expanded; unavoidable metal ion leaching in the activating process of a metal nano catalystis overcome; and the preparation method has the advantages of simple process, easiness for repeated operation, controllable structure, suitability for large-scale production and the like.

A phosphite composition comprising at least two of a tris(dibutylaryl) phosphite, a tris(monobutylaryl) phosphite, a bis(dibutylaryl)monobutylaryl phosphite, and a bis(monobutylaryl)dibutylaryl phosphite. The inventive phosphite composition is a liquid at ambient conditions.

The invention discloses a composite microsphere. The composite microsphere is formed in a way that chitosan and collagen are combined. The invention further discloses a radioactive microsphere for radioactive therapy, and radionuclides are marked on the microsphere. The invention further discloses a preparation method and application of the microsphere. According to the composite microsphere, the preparation method and the application, a biodegradable chitosan-collagen composite microsphere is used as nuclide and a drug carrier, both the chitosan and the collagen have good biocompatibility, are biodegradable and can be stably combined with a plurality of radionuclides and drugs (such as chemotherapy drugs, bioactive macromolecules and the like), and clinical application prospects are good.

The invention discloses a preparation method of a titanium dioxide nanoparticles / graphene composite photocatalytic material. With tetra-n-butyl titanate, graphite powder, concentrated sulfuric acid, concentrated nitric acid and DMF as main raw materials, and a titanium dioxide nanoparticles / graphene composite photocatalytic material is prepared by a method of slow hydrolysis prior to hydrothermal synthesis. The photocatalytic performance of the prepared material is tested by simulated sunlight, and the bio-refractory organic pollutant rhodamine B is degraded to prove the excellent photocatalytic performance of the material. As an inorganic photocatalytic material, the composite material has relatively high photocatalytic activity and is of a perfect application prospect in environmental protection. The method has the advantages that the particle size of titanium dioxide is controllable, the graphene sheets are of good dispersity, and the titanium dioxide only grows on the graphene surface and is uniformly dispersed on the graphene sheets.

The invention discloses a tower-type self-circulation aerobic degradation reactor. Waste water is uniformly introduced into an anoxic reaction zone at the bottom of the reactor by virtue of a water inlet pipe and a water distribution system which are arranged at the bottom of the reactor, the waste water is jointly mixed and reacts with high-concentration sludge and digestive fluid which are arranged at the bottom of the reactor and mixed liquor refluxed through a central reflux pipe, the mixture rises for forming a vertically rising type flow state upward movement, and a water inlet pump and an aeration fan are used for providing power, so that no sludge, digestive fluid reflux pump and the like is needed; meanwhile, the aeration fan has low power requirement, a conventional air blower is needed only, and operating cost and management difficulty are greatly reduced.

The invention provides a composite porous bone tissue engineering scaffold. The composite porous bone tissue engineering scaffold comprises a porous PLGA scaffold and zwitterionic hydrogel compoundedwith the porous PLGA scaffold. The invention also provides a method for preparing the composite porous bone tissue engineering scaffold. The method comprises preparing a zwitterionic hydrogel performed liquid containing a zwitterionic monomer, an initiator and a crosslinking agent, immersing the porous PLGA scaffold subjected to plasma surface modification in the performed liquid, taking out the porous PLGA scaffold and carrying out UV crosslinking and freeze drying. Through compounding of the zwitterions and the porous PLGA scaffold, the sharp degradation of the common biodegradable tissue engineering scaffold is avoided, stable degradation of the whole scaffold is realized and the biocompatibility and biosafety of the scaffold material are greatly improved. Through compounding of the zwitterionic hydrogel and the PLGA scaffold, the whole scaffold has a growth factor efficient sustained-release function.

The invention discloses a phosphorus-silicon-nitrogen-containing metal ion complex flame retardant, and a preparation method and an application thereof. The phosphorus-silicon-nitrogen-containing metal ion complex flame retardant (M(PDC)1-3) is synthesized through successfully preparing a ligand containing DOPO, POSS and catechol by a one-step process and coordinating the ligand with metal ions. The metal ion complex flame retardant has a high thermal stability, a good compatibility with epoxy resin and a strong catalysis effect, and can accelerate the generation of a large amount of residualcarbon during burning of materials to generate a dense carbon layer playing a role in thermal insulation and oxygen isolation, so the flame retardation property of a matrix is improved. The phosphorus-silicon-nitrogen-containing metal ion complex (M(PDC)1-3) can reduce the curing temperature during curing of the epoxy resin and a curing agent, so the phosphorus-silicon-nitrogen-containing metal ion complex also can be used as a promoter during curing when used as a flame retardant. The phosphorus-silicon-nitrogen-containing metal ion complex (M(PDC)1-3) greatly improves the mechanical properties of the epoxy resin when introduced into the epoxy resin.

The invention provides an integrated water treatment system for treating both water for seawater recirculating aquaculture and tail water. The integrated water treatment system comprises a sewage collection tank, a physical filtering device, an air floating pool, an electrode-suspended filler coupled biofilter treating unit, and an ozone-ultraviolet combined pathogenic microorganism killing unit which are connected in sequence, wherein the sewage collection tank, the physical filtering device, the air floating pool, the electrode-suspended filler coupled biofilter treating unit, the ozone-ultraviolet combined pathogenic microorganism killing pool are all connected with a sludge concentration-dehydration device, and the ozone-ultraviolet combined pathogenic microorganism killing pool is also connected with a culture pond. The integrated water treatment system of the invention has the characteristics of high water treatment efficiency and continuous maintenance of the high water quality of an aquaculture system, and the water circulation utilization rate of the system can reach 95% to 98%; and the integrated water treatment system can fully meet the demand for healthy culturing of cultured objects, has a tail water treatment function, and allows the tail water to be discharged after reaching the standard.

The invention discloses a method for preparing a marine environment-friendly calcium citrate hard tissue repair material. The method comprises the following steps of: (1) cleaning fresh oyster shells in a non-pollution sea area physicochemically, soaking the cleaned fresh oyster shells in weak acid, and washing by flowing water until impurities are removed completely; (2) crushing the clean oyster shells into granules by a ball grinding mill, and sieving with a 200-mesh sieve; (3) reacting oyster shell powder with a supersaturated solution of citric acid, centrifuging, taking precipitates out, and drying by a forced draft drying machine to obtain calcium citrate powder; and (4) filtering the prepared calcium citrate powder by using a 100-mesh filter sieve, filtering by using a 60-mesh filter sieve, and taking filtered substances out to obtain calcium citrate granules. The marine environment-friendly calcium citrate hard tissue repair material has high mechanical strength and appropriate granular sizes, and the degradation time of the material is prolonged by tight bonding force among crystals, so that the material can be degraded slowly in bodies, and calcium ions are released stably to create a local high-calcium environment; and the marine environment-friendly calcium citrate hard tissue repair material has an obvious therapeutic effect on bone loss, osteoporosis and bone tumors, and has a wide application value in biological tissue repair.

The present invention relates generally to a relatively stable magnetic photocatalyst comprising an insulated magnetite core coated with a layer of photoactive titanium dioxide. In one example, the insulation layer is silicon dioxide which blocks direct electrical contact between the titanium dioxide and the magnetite.

The invention provides a marine aquaculture tail water treatment system, comprising a sewage collection pool, a physical filtering device, an air floatation tank and an electrode-suspended filler coupled biological filter treatment unit, wherein the sewage collection pool, the physical filtering device, the air floatation tank and the electrode-suspended filler coupled biological filter treatment unit are separately connected with a sludge concentration and dehydration device; suspended filler in the electrode-suspended filler coupled biological filter treatment unit is arranged in a biological filter; a direct current (DC) anodic-cathodic array combination is arranged at the upper part of the biological filter; an electric stirring device is arranged at the lower part of the biological filter; a sludge bucket is arranged at the bottom of the biological filter; the electric stirring device is arranged above the sludge bucket; a carbon source replenishment device is connected with the biological filter by means of a pipeline. The marine aquaculture tail water treatment system has the advantages of being high in nitrogen and phosphorus removal treatment efficiency, small in land occupation area, energy-saving, low in cost, free from secondary pollution, simple and convenient to manage, and the like.

The invention discloses Rhodococcus DSH capable of degrading environmental hormone bisphenol A, and applications thereof, wherein the Rhodococcus DSH belongs to Rhodococcus sp, is named as Rhodococcus DSH, has the preservation number of CGMCC NO. 12392, and is preserved in the China General Microbiological Culture Collection Center, wherein the address is Institute of Microbiology, Chinese Academy of Sciences, 3# Court No.1, Beichen West Road, Chaoyang District, Beijing, and the sequence of the 16S rDNA fragment of the Rhodococcus DSH is represented by SEQ ID NO:1 in the sequence table. According to the present invention, the active sludge of the bisphenol A production drug factory is subjected to enrichment acclimation, purification separation and re-screening to obtain the Rhodococcus DSH, wherein the Rhodococcus DSH can stably and efficiently degrade bisphenol A, and can be used for the bisphenol A biodegradation in the environment, and the environmental remediation.

The invention provides a high-efficiency nitrogen and phosphorus removal system for treating aquaculture tail water. The system comprises a tail water treatment biological filter, suspended filler, a direct current (DC) anodic-cathodic array combination, an electric stirring device and a carbon source replenishment device, wherein the suspended filler is arranged in the tail water treatment biological filter; the DC anodic-cathodic array combination is arranged at the upper part of the tail water treatment biological filter; the electric stirring device is arranged at the lower part of the tail water treatment biological filter; a sludge bucket is arranged at the bottom of the tail water treatment biological filter; the electric stirring device is arranged above the sludge bucket; the carbon source replenishment device is connected with the tail water treatment biological filter by means of a pipeline; the volume ratio of the suspended filler to water body in the tail water treatment biological filter is equal to 20-50%; the density of the suspended filler is 0.92-0.98g / cm<3>. The high-efficiency nitrogen and phosphorus removal system for treating the aquaculture tail water has the advantages of being high in nitrogen and phosphorus removal treatment efficiency and small in land occupancy area, does not need an air pump for oxygenation, is energy-saving, low in cost, free from secondary pollution, simple and convenient in management, and the like.

The invention relates to the technical field of marine antifouling coatings, in particular to a preparation method and application of biodegradable antifouling resin. The preparation method comprises the steps that raw materials including lactic acid, polyhydric alcohols and / or polyester polyol, a catalyst and a solvent A are adopted to synthesize a biodegradable polylactic acid block polymer P1; raw materials including the P1, triethylamine, methylacryloyl and a solvent B are adopted to synthesize polylactic acid block polymer based acrylic ester, raw materials including the P2, a metacrylic acid ester monomer, an initiator and a solvent C are adopted to synthesize a biodegradable acrylate polymer P3. The prepared biodegradable antifouling resin can be applied to the preparation of degradable antifouling coatings, the prepared antifouling coatings have excellent resistance to immersing in seawater and controllable degradability, then release of an antifouling agent is controlled, and a long-term antifouling effect is achieved.

The invention relates to 'a method for recycling water sediment' and belongs to the technical field of water remediation. The method is characterized by comprising: mixing sediment and a culture medium in a weight ratio of 10:(1-3), crushing to obtain a raw material, and inoculating organic matter degrading bacteria tolerant to high temperature to carry out high-temperature fermentation in aerobic environment to obtain humus; the culture medium includes plant straws, seed shells, and / or fruit shells. The humus has high conversion rate and high decomposition degree, can greatly promote the growth and reproduction of plants, may act as agricultural compost, cultivation media and the like and may be recycled in water as cultivation media for aquatics.

The invention discloses antifouling mildew-proof diatom ooze coating and a preparation method thereof. The antifouling mildew-proof diatom ooze coating is mainly prepared from, by weight, 42-50 partsof deionized water, 22-26 parts of diatomite, 16-20 parts of emulsion, 0.5-1 part of ammonium hydroxide, 8-10 parts of filler, 8-10 parts of nano sepiolite powder, 1.5-1.7 parts of ethylene glycol, 0.7-0.8 part of sodium hydroxide, 3-5 parts of a composite material, 2-3 parts of modified nano zinc oxide, 0.5-1 part of a composite mildew-proof agent, 0.3-0.5 part of a dispersing agent, 0.2-0.4 partof an antifoaming agent and 0.2-0.4 part of a leveling thickening agent. By deionized water serving as a solvent, emulsion serving as a film forming matter of the coating, diatomite and nano sepiolite powder serving as functional filler in a scientific ratio and the composite material, functions of purification of harmful substances such as VOC (volatile organic compounds), formaldehyde, moistureand the like, breathable humidity regulation, noise reduction, thermal preservation, heat insulation, fire prevention, flame retardation and the like of coatings are guaranteed.

The invention relates to the field of photocatalysis, in particular to a two-dimensional ZnO / BiOBr0.9I0.1 hybrid photocatalyst and a preparation method thereof. The photocatalyst is formed by carrying out two-phase hybridization and prepared from the following chemical components: ZnO / BiOBr0.9I0.1, wherein 0.9 and 0.1 respectively indicate stoichiometric mole fractions of halogens Br and I, and the mass percentage of ZnO is 10-50%. The preparation method of photocatalyst comprises the following characteristic steps: (1) preparing a two-dimensional ultra-thin Zn5(CO3)2(OH)6 sheet layer; and (2) preparing the two-dimensional ultra-thin ZnO / BiOBr0.9I0.1 hybrid photocatalyst. According to the two-dimensional ultra-thin ZnO / BiOBr0.9I0.1 hybrid photocatalyst provided by the invention, organic dyes can be degraded, and toxic organic phenol with a relatively stable structure also can be degraded. The preparation method is easy and environment-friendly, and has a potential application value in a solar photocatalytic decomposition treatment technology of organic pollutants.

The invention discloses a landfill disposal method for rapidly stabilizing organic household waste and increasing methane yield. Household wastes are comprehensively sorted, the effective volume of a landfill unit of a bioreactor is sufficiently utilized, and cost is reduced; a buffer covering material, a heat exchange pipeline system and a leachate recharge system are laid to regulate pH, temperature and moisture content of waste digestion reaction in a landfill area, enhancing the growing and metabolic capability of microorganisms, consequently, waste degradation is accelerated, and the period of stabilizing wastes is shortened; and an IC (internal circulation) reactor is adopted to ferment initial leachate for the second time and recover methane. By utilizing leachate recharge after fermentation, the treatment load of the landfill area cannot be increased, and problems, such as easy excessive acidification in the operation process of a high-load anaerobic system, are improved; and moreover, the method abides by the objective law of anaerobic digestion of organic matter, effectively promotes the stability of organic household waste degradation, greatly increases the methane production rate and methane yield of the landfill unit, and increases the reclamation level of the landfill unit of the bioreactor.

The invention provides an efficient filling for promoting the growth of microbes in water bodies as well as the system stability and is characterized in that the filling is composed of fixation bands, suspended flexible films and cluster hand belts sequentially connected from top to bottom, and the cluster hand belts are composed of strips alongside connected with the suspended flexible films. The filling is applicable to sewage purification and other purposes, and can promote the growth of the microbes in the water bodies. The bionic filling provides attachment, growth and propagation environments for a plurality of organisms such as the microbes in the water bodies, etc., and can also provide food for a plurality of organisms. The filling can promote the growth of the autotrophic biology (such as algae, etc.) and the heterotrophic biology (such as bacteria, etc.), thereby providing food sources for the creatures in relatively large size, further forming a stable aquatic food chain in the water bodies, and enabling pollutants in the water bodies to be fast and stably degraded.

The invention particularly relates to a supported monatomic silver catalyst, a preparation method and application thereof. The preparation method of the catalyst comprises the following steps of: in a low-temperature environment, slowly adding a mixed solution of a reducing agent, an acid solution and an organic solvent dropwise into a mixed solution of a silver-containing precursor, a titanium precursor, activated carbon and the organic solvent, and after dropwise adding is finished, continuously carrying out stirring for complete reaction, performing ultrasonic treatment, performing suction filtration, washing and drying to obtain the supported monatomic silver catalyst. The preparation method disclosed by the invention is simple and easy to industrialize, for the prepared catalyst, silver is uniformly dispersed on a composite carrier of activated carbon and nano titanium dioxide in an atomic form, formaldehyde can be oxidized and decomposed into carbon dioxide and water at normal temperature or under a normal-temperature illumination mixing condition, the formaldehyde degradation efficiency is high, and the performance is stable.

The invention discloses a preparation method of bismuth oxyfluoride / graphene composite visible light catalyst. The main points of the technical scheme of the present invention are: configure Bi(NO 3 ) 3 ∙5H 2 The ethylene glycol solution of O and the ethylene glycol solution of NaF were mixed, and 100 mL of deionized water was added dropwise to obtain a white precipitate, which was dried by suction filtration and kept at 300°C for 2 hours to obtain spherical bismuth oxyfluoride with a particle size of 800 nm. Disperse graphene oxide in deionized water, add spherical bismuth oxyfluoride to the graphene oxide aqueous solution, add hydrazine hydrate, and reduce to polymer precipitation in a water bath at 80°C. The solution becomes clear. After the reaction, the solution is naturally cooled to room temperature and filtered. , washed with deionized water and ethanol three times respectively, and dried at 80°C in a constant temperature drying oven to prepare a bismuth oxyfluoride / graphene composite visible light catalyst. The bismuth oxyfluoride / graphene composite visible light catalyst prepared by the invention has the advantages of wide absorption spectrum range, stable performance, non-toxicity, high efficiency and low cost, and can be applied to the degradation of refractory organic pollutants.

The invention discloses a kitchen sewage multi-stage treatment process, and belongs to the technical field of sewage treatment. The treatment process comprises the following steps: performing three-phase separation in a regulating tank; carrying out primary anaerobic high-temperature fermentation; carrying out secondary anaerobic medium-temperature fermentation; precipitating in a precipitation tank; performing a normal-temperature biochemical treatment in a biochemical pool; performing a sedimentation treatment in a secondary sedimentation tank; and discharging processed water into a clean water tank. The heat in the sewage treatment front process is fully utilized; energy is fully and efficiently utilized in a gradient mode, organic matters in sewage are degraded step by step, and the process can adapt to the characteristics of low pH, high SS, high COD, high oil content and the like of kitchen sewage, has the characteristics of high energy utilization rate, high biogas yield, high COD removal rate, stable treatment effect, low operation and maintenance cost and the like, can realize up-to-standard discharge of the kitchen sewage, and is suitable for popularization and application in the field of kitchen sewage treatment.

The invention relates to the technical field of biochemical detection, in particular to an in-vitro degradation method of human fibrin. According to the invention, fibrins are pretreated in a filtering and grinding mode, the prepared fibrin forms uniform and fine particles under the action of mechanical shearing force, and subsequent plasmin degradation is facilitated, by controlling the adding amount of plasmin and rapidly centrifuging after fibrinolysis is finished to obtain a supernate, and a freeze-dried product prepared by adding a certain amount of a freeze-drying formula can be stably stored for more than one year for a long time. In addition, the experiments prove that more stable degradation products can be obtained under the parameters in the scheme, and the method has more obvious advantages compared with other parameters.