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39 results about "Perfluorooctanesulfonic acid" patented technology
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Perfluorooctanesulfonic acid (conjugate base perfluorooctanesulfonate) (PFOS) is an anthropogenic fluorosurfactant and global pollutant. PFOS was the key ingredient in Scotchgard, a fabric protector made by 3M, and numerous stain repellents. It was added to Annex B of the Stockholm Convention on Persistent Organic Pollutants in May 2009. PFOS can be synthesized in industrial production or result from the degradation of precursors. PFOS levels that have been detected in wildlife are considered high enough to affect health parameters, and recently higher serum levels of PFOS were found to be associated with increased risk of chronic kidney disease in the general US population. "This association was independent of confounders such as age, sex, race/ethnicity, body mass index, diabetes, hypertension, and serum cholesterol level."
Organic fuel cell methods and apparatus
InactiveUS20060204810A1Poor fuel wetting propertyImprove wettabilitySolid electrolytesFuel cells groupingElectrical batteryOrganic fuel
A liquid organic, fuel cell is provided which employs a solid electrolyte membrane. An organic fuel, such as a methanol / water mixture, is circulated past an anode of a cell while oxygen or air is circulated past a cathode of the cell. The cell solid electrolyte membrane is preferably fabricated from Nafion™. Additionally, a method for improving the performance of carbon electrode structures for use in organic fuel cells is provided wherein a high surface-area carbon particle / Teflon™-binder structure is immersed within a Nafion™ / methanol bath to impregnate the electrode with Nafion™. A method for fabricating an anode for use in a organic fuel cell is described wherein metal alloys are deposited onto the electrode in an electro-deposition solution containing perfluorooctanesulfonic acid. A fuel additive containing perfluorooctanesulfonic acid for use with fuel cells employing a sulfuric acid electrolyte is also disclosed. New organic fuels, namely, trimethoxymethane, dimethoxymethane, and trioxane are also described for use with either conventional or improved fuel cells.
Owner:CALIFORNIA INST OF TECH +1
Methods of inducing metabolic maturation of human pluripotent stem cells-derived hepatocytes
ActiveUS20170266145A1Increasing metabolic maturationOrganic active ingredientsCulture processInduced pluripotent stem cellThiazolidinedione
Provided are methods of increasing metabolic maturation of an immature hepatocyte, by contacting an immature hepatocyte which expresses alpha-fetoprotein (AFP) and albumin with an effective amount of a fatty acid or a small molecule selected from the group consisting of: an amphipathic carboxylic acid, Thiazolidinedione (TZD), WY-14643 (Pirinixic Acid), GW409544, GW6471, Leukotriene B4, GW 7647, Perfluorooctanesulfonic Acid, Perfluorooctanoic Acid, CP-775146, CP-865520, UNII-999KY5ZIGB, and Gemfibrozil. Also provided are isolated hepatocytes and uses thereof.
Owner:YISSUM RES DEV CO OF THE HEBREWUNIVERSITY OF JERUSALEM LTD
Preparation method of adsorbent for removing typical perfluorinated compounds in water environments
The invention discloses a method for synthesizing a novel adsorbing material capable of selectively absorbing perfluorooctanic acid (PFOA) and perfluorooctane sulfonate (PFOS) in water environments by means of a Molecular imprinting technique (MIT). The method comprises the steps that a bi-functional monomer molecular imprinted polymer (TMFAA / 4-Vpy-MIP) is synthesized by selecting 2-(Trifluoromethyl)acrylic acid (TFMAA) and 4-Vinylpyridine (4-Vpy) as bi-functional monomers, selecting PFOA as a template molecule and selecting EDMA as a cross-linking agent; the polymer can efficiently and selectively absorb and remove PFOA and PFOS in a water phase simultaneously, wherein the adsorption rate for PFOA reaches 78.8%, the adsorption rate for PFOS reaches 76.7%, the removal rate of adsorption for short chains PFCs (PFBA, PFPA, PFHpA and PFBS) is only 13.2% to 47.6%, the removal rates of adsorption for long chains PFCs (PFNA, PFDA, PFUnA and PFDoA) are 65.0%, 67.0%, 68.7% and 65.1% respectively, and the adsorption rate for PFHpA is only 12.8%. After the novel absorbing material is repeatedly used five times, the adsorption rate can still reach 74.9% to 93.5%. The synthesized TFMAA / 4-Vpy-MIP has good selective adsorptivity and renewability and can be used for adsorption removal of PFOA and PFOS in various water environments.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI
Environment-friendly super-hydrophobic oil-resistant surface treating agent for textile, and synthetic method and application thereof
InactiveCN105350317ASimple production processEase of mass productionLiquid repellent fibresFiberSolvent
The invention provides an environment-friendly super-hydrophobic oil-resistant surface treating agent for a textile. The surface treating agent mainly comprises the following raw materials by weight: 1 to 15 parts of a fluorine-containing compound, 1 to 5 parts of a silicon-containing compound, 1 to 15 parts of a fluorine-silicon copolymer, 0.5 to 5 parts of a silane coupling agent and 50 to 95 parts of a solvent. The surface treating agent is prepared by subjecting the above-mentioned raw materials to a reaction at 5 to 45 DEG C for 0.5 to 3 h. The surface treating agent has good hydrophobicity to the textile. The invention has the following advantages: the synthetic method for the surface treating agent is simple and is convenient for large-scale production; the surface treating agent can endow the textile with super-hydrophobicity, oil resistance and antifouling property; the surface treating agent is environment-friendly and does not contain perfluorocapylic acid (PFOA) and perfluorooctane sulfonate (PFOS) compounds; the surface treating agent is simple and convenient to use and applicable to manners like spraying, dip-coating and brush coating; the surface treating agent has a fast drying speed, can be used at room temperature and is free of requirements for special treatment; and the surface treating agent is applicable to a textile made of cotton, hemp, wool, silk, pile, fiber, leather or the like.
Owner:ANHUI SINOGRACE CHEM
Method for quantitatively detecting perfluorooctane sulfonate isomeride in water sample
ActiveCN102866225ARealize quantitative analysis and detectionSolve the problem of quantification errorComponent separationSolid phase extractionDerivatization
The invention provides a method for quantitatively detecting perfluorooctane sulfonate isomeride in a water sample, which belongs to the field of perfluorooctane sulfonate monitoring. The method for quantitatively detecting the perfluorooctane sulfonate isomeride in the water sample comprises the steps of (1) solid phase extraction: quantitatively taking the water sample, carrying out extraction with a solid phase extraction column, carrying out centrifugation to eliminate moisture in the extraction column after extraction, then purifying the dried extraction column by a buffer solution and methanol, eluting the purified extraction column with alkaline methanol, and collecting an eluant; (2) chemical processing of an extract: drying nitrogen of the eluant with wind, adding derivatization reagents, tetrabutylammonium hydroxide and methyl tertiary butyl ether, to be mixed, drying the solution nitrogen with wind, and adding the methyl tertiary butyl ether to be uniformly mixed so as to keep the volume constant; and (3) gas chromatography-mass spectrometric detection. The method successfully realizes the effective separation of the PFOS (perfluorooctane sulfonate) isomeride so as to realize the accurate and quantitative detection of the PFOS isomeride. Compared with the existing test technology, the method realizes the quantitative analysis and detection of the PFOS isomeride, and solves the problem of quantitative errors of PFOS.
Owner:NANJING UNIV
Preparation method and application of nano coated electrode
InactiveCN102659224AStrong oxidation abilityStrong service lifeWater/sewage treatment by oxidationElectrolysisWastewater
The invention discloses a preparation method of a nano coated Ti / SnO2-Sn-Ce electrode and a process and a method for utilizing the same for degradation of perfluorooctane sulfonate in water, and belongs to the technical field of electrochemistry. Perfluorooctane-sulfonate-containing waste water is subjected to electrolytic oxidation by utilizing the nano coated Ti / SnO2-Sn-Ce electrode as an anode and Ti or 304 stainless steel as a cathode. The preparation method is characterized in that perfluorooctane sulfonate can be subjected to fast degradation under mild conditions. By means of electrochemical oxidation, the preparation method is simple in process procedures, convenient to operate, mild in reaction conditions, excellent, stable and reliable in treatment effect and easy to realize industrial application. The nano coated Ti / SnO2-Sn-Ce electrode has the advantages of high oxidation performance, long service life, easiness in processing, low cost and the like.
Owner:BEIJING NORMAL UNIVERSITY
Fluorine-based surfactant, and coating composition and resist composition each using the same
InactiveUS20130172476A1Avoid excessive accumulationImprove abilitiesFibre treatmentPhotomechanical apparatusResistEther
Provided is a fluorine-based surfactant including a copolymer synthesized by copolymerizing, as essential monomers, a polymerizable monomer (A) having a poly(perfluoroalkylene ether) chain and polymerizable unsaturated groups at both ends of the chain and a polymerizable monomer (B) having an oxyalkylene group and a polymerizable unsaturated group. The fluorine-based surfactant cannot structurally generate PFOS or PFOA, which tend to accumulate in the environment and living bodies; even when the fluorine-based surfactant has lower fluorine content than surfactants having a fluoroalkyl group having 8 or more carbon atoms, the fluorine-based surfactant has a higher capability of decreasing surface tension than the surfactants. Accordingly, the fluorine-based surfactant can be suitably used as a leveling agent for a coating composition, a resist composition, or the like.
Owner:DAINIPPON INK & CHEM INC
Degrading Halogenated Organic Compounds
InactiveUS20130200303A1Eliminating environmental ‘ stress ’Reduce the amount requiredLiquid degasificationContaminated soil reclamationSimple Organic CompoundsCompound (substance)
A method of degrading halogenated organic compounds, to use of the method for decontaminating PFOS (perfluorooctanesulfonic acid) and PFOA (perfluorooctanoic acid) contaminated medium, and a composition such as that which is suitable to be applied in said method.
Owner:ARCADIS NEDERLAND
Method for determining total organic fluorine in water sample and aqueous solution
InactiveCN108828128AReduce processing costsThe measurement process is easy to implementComponent separationPreparing sample for investigationWater basedUltraviolet
The invention discloses a method for determining total organic fluorine in water based on ultraviolet sulfite pretreatment, and the method comprises the following steps: performing non-selective degrading defluorination on various perfluoro / polyfluoric organic compounds (PFCs) including the organic compounds most difficult to degrade such as perfluorooctane sulfonate (PFOS) in contaminated water bodies (including drinking water, surface water and industrial wastewater, etc.) to convert organic fluorine in aqueous solution to inorganic fluoride ions, and determining the concentration of fluoride ions to obtain the amount of total organic fluorine in the water sample. The reagents and instruments used in the method are highly available, and the cost of the determination is greatly reduced compared with the current mainstream methods, and the whole process is easy to implement.
Owner:TSINGHUA UNIV
Method utilizing polylactic acid/carbon nanotube composite electro-spun fiber membrane to absorb and remove perfluorooctane sulfonate in water
InactiveCN104512942AEasy to makeEnhanced mechanical properties and adsorption propertiesOther chemical processesWater treatment compoundsFiberSorbent
The invention belongs to the field of sewage processing, and specifically relates to a method utilizing a polylactic acid / carbon nanotube composite electro-spun fiber membrane to absorb and remove perfluorooctane sulfonate in water. The method comprises two steps: preparation of a polylactic acid / carbon nanotube composite electro-spun fiber membrane and removal of perfluorooctane sulfonate in water through adsorption of the polylactic acid / carbon nanotube composite electro-spun fiber membrane. More specifically, the method comprise the following steps: taking polylactic acid and carbon nanotubes, which have been processed by acid, as the raw materials, then spinning the raw materials through an electrostatic spinning technology so as to obtain polylactic acid / carbon nanotube composite electro-spun fiber membrane, and then making the composite electro-spun fiber membrane carry out reactions with perfluorooctane sulfonate water solutions with different concentrations so as to remove perfluorooctane sulfonate in water through adsorption. The invention provides an efficient method for remove perfluorooctane sulfonate in water through adsorption, more than 70% of perfluorooctane sulfonate in water can be removed ( in a concentration range of 2-1000 microgram / liter), and the absorbent has the advantages of simple preparation, environment-friendliness, and easy recycling. The method is easy to operate, is economic and efficient, and will not generate secondary pollution to the environment.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI
Regenerative adsorption material for quickly adsorbing and removing organic micro-pollutants in water and method for preparing regenerative adsorption material
ActiveCN107952419AHigh renewable rateImprove adsorption capacityOther chemical processesWater contaminantsIron nanoparticleGraphite
The invention discloses a regenerative adsorption material for quickly adsorbing and removing organic micro-pollutants in water and a method for preparing the regenerative adsorption material. The method includes carrying out reaction on graphite fluoride which is used as a raw material to obtain graphene fluoride; carrying out reaction on FeCl2 4H2O and FeCl3 6H2O which are used as raw materialsto obtain magnetic iron nano-particles; carrying out mild modification on the basis of the graphene fluoride by the aid of the magnetic iron nano-particles to obtain the adsorption materials for adsorbing and removing the persistent organic micro-pollutants perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) in real environmental water (lake water, river water and tap water). The regenerative adsorption material and the method have the advantages that the regenerative adsorption material is high in PFOA and PFOS adsorption speed and efficiency and easy to separate and recycle and can be reused, regeneration procedures are simple, and accordingly the regenerative adsorption material and the method have high application values.
Owner:冠县安昌信息科技服务有限公司
Stretchable coated fabric and process for producing same
InactiveCN104364437AImprove waterproof performanceImprove the windproof effectWeft knittingWarp knittingFiberPolymer science
A stretchable coated fabric to which water repellency has been imparted using a fluorochemical water repellent (C6 fluorochemical water repellent) comprising a copolymer containing a C6 or lower perfluoroalkyl group. As a result of this configuration, no C8 fluorochemical water repellent containing perfluorooctanoic acid, perfluorooctanesulfonic acid, or the like is used and, hence, the coated fabric exerts no influence on the environment. The fluorochemical water repellent has a toluene repellency of 100 seconds or higher, the synthetic-resin solution to be applied to at least one surface of a stretchable cloth has a thixotropic index measured at 23ºC of 1.4-2.0, and the synthetic resin has a 100% modulus of 5 kgf / cm2 or higher. Consequently, the stretchable coated fabric is free from, for example, synthetic-resin leakage to the back, and a coating resin film is formed with excellent film formation properties.
Owner:SEIREN CO LTD
Magnetic molecular imprinting polymer for separating and enriching perfluorooctane sulfonate and preparation method thereof
ActiveCN107082856ASmall particle sizeLarge specific surface areaOther chemical processesAlkali metal oxides/hydroxidesPerfluorooctanesulfonic acidMolecular imprinting
The invention belongs to the technical field of a magnetic molecular imprinting polymer, and particularly relates to a magnetic molecular imprinting polymer for separating and enriching perfluorooctane sulfonate and a preparation method thereof. The magnetic molecular imprinting polymer has an ultrathin molecular imprinting film, and achieves fast adsorption dynamics, high adsorption selectivity and repeated use performance; the perfluorooctane sulfonate in water can be effectively and fast removed.
Owner:SOUTHWEST UNIV
Method for synthesizing ketone through catalyzing and hydrolyzing alkyne with silver perfluorooctanesulfonate
ActiveCN104529725AEasy to separateGood choiceCarboxylic acid nitrile preparationOrganic compound preparationKetoneAlkyne
The invention provides a method for synthesizing a corresponding ketone through catalyzing and hydrolyzing an alkyne with silver perfluorooctanesulfonate. According to the method, water serves as a solvent, an alkyne serves as a raw material, silver perfluorooctanesulfonate serves as a main catalyst, and perfluorooctanesulfonic acid serves as an auxiliary catalyst, and reaction is carried out to synthesize a corresponding ketone. The method provided by the invention is an environment-friendly method for synthesizing a ketone by hydrolyzing an alkyne. The method has the advantages that the selectivity and yield of the target product are more than 90%, n-hexane or diethyl ether is added at the end of reaction to divide reactants into two phases, the catalysts can be reused directly in the water phase, the product of reaction is extracted and separated simply to obtain a corresponding ketone, and the whole reaction and separation processes are simple and environment-friendly.
Owner:HUNAN UNIV
Preparation method of porous ceramic surface perfluorooctane sulfonic acid molecularly imprinted adsorbent
InactiveCN107126939ASpecific recognition abilityHigh selectivityOther chemical processesWater contaminantsN dimethylformamideSorbent
The present invention discloses a preparation method of a porous ceramic surface perfluorooctane sulfonic acid molecularly imprinted adsorbent. According to the preparation method, waste ceramic is used as the supporting body of an adsorbent, and perfluorooctane sulfonic acid is used as a template molecule; 58-65% by mass of N,N-dimethylformamide, 15-20% by mass of succinimide, 1.0-3.0% by mass of perfluorooctane sulfonic acid, 12-18% by mass of aminated porous ceramic powder, and 1.0-4.0% by mass of ammonium persulfate are added to a reactor, a stirring reaction is performed for 6 h at a temperature of 75+ / -2 DEG C in the absence of oxygen, the obtained product is subjected to stirring washing for 12 h with the mixed solution of ethanol and sodium hydroxide, the template molecule is removed, and drying is performed to obtain the porous ceramic surface perfluorooctane sulfonic acid molecularly imprinted adsorbent. According to the present invention, the porous ceramic surface perfluorooctane sulfonic acid molecularly imprinted adsorbent can specifically recognize perfluorooctane sulfonic acid, and has advantages of high selectivity, good mechanical property, good chemical stability, fast adsorption, easy elution, and regenerative capacity.
Owner:UNIV OF JINAN
Method for performing combined catalytic degradation on perfluorooctane sulfonate in water by using visible light-electricity
InactiveCN104628193AEasy to operateReduce current densityWater/sewage treatment by irradiationWater contaminantsElectricityPhotocatalytic reaction
The invention discloses a method for performing combined catalytic degradation on perfluorooctane sulfonate in the water by using visible light-electricity and discloses a novel method for removing the perfluorooctane sulfonate in the water. The visible light is used as a light source and is combined with an electrochemical technology so that the removing efficiency is increased. A suspended light-catalyzed reaction device is adopted by the technology, and a catalyst is dispersed in the solution and is subjected to lucifugal ultrasound process for 5 minutes before the reaction so that the uniform dispersion and absorption effect of the catalyst can be realized. By contrasting the experiment of independently using a photochemical and electrocatalysis technology to remove the perfluor compound in the water, the coupling technology is capable of effectively improving the removing effect of the perfluor compound. The method aims at providing a new technology for removing the perfluorooctane sulfonate in the water.
Owner:BEIJING NORMAL UNIVERSITY
Glycerol trilaurate-containing modified silanization metal surface pretreatment agent and preparation method thereof
ActiveCN103014687AOvercome CorrosivityOvercome uniformity issuesMetallic material coating processesEpoxySilanes
The invention discloses a glycerol trilaurate-containing modified silanization metal surface pretreatment agent. The glycerol trilaurate-containing modified silanization metal surface pretreatment agent comprises the following components in parts by weight: 100 of deionized water, 10-15 of modified coupling agent, 10-15 of ethanol, 30-40 of vinyl-tris(beta-methoxy-ethoxy)silane, 20-30 of vinyl triethoxysilane, 1-2 of dicumyl peroxide, 0.002-0.003 of perfluorooctanesulfonic acid sodium salt, 0.3-0.5 of tree ashes, 4-6 of epoxy resin emulsion, 2-3 of carboxymethyl cellulose sodium, 0.4-1.0 of glycerol trilaurate, 0.2-0.6 of polyoxyethylene oleate, 0.005-0.01 of lanthanum acetate, and 0.1-0.3 of phytic acid. The final glycerol trilaurate-containing modified silanization metal surface pretreatment agent is prepared by modifying through a coupling agent, compounding, adding auxiliaries for distribution, mixing and reacting. The modified silanization metal surface pretreatment agent has the characteristics of being non-toxic and environment-friendly, convenient to use, compact and even for silane membranes, strong in bonding force, and good in corrosion resistance property.
Owner:蚌埠尚维知识产权运营有限公司
Method for preparing diethylenetriamine modified banana fiber adsorbent
InactiveCN108543524AGood physical and chemical stabilityHigh mechanical strengthOther chemical processesWater contaminantsEpoxySorbent
The invention discloses a method for preparing a diethylenetriamine modified banana fiber adsorbent. The method is characterized by comprising the following steps: firstly, carrying out pretreatment on banana fibers by adopting sulfuric acid and ammonium persulfate to obtain pretreated banana fibers; carrying out epoxidation treatment on the pretreated banana fibers by using epibromohydrin; finally, adding the following components in a reactor in percentage by mass: 82 to 87 percent of deionized water and 3 to 8 percent of diethylenetriamine; carrying out stirring and dissolution, and then adding 8 to 12 percent of epoxy banana fibers, wherein the sum of the mass percentage of all components is 100 percent; heating to 60(+ / -) 2 DEG C and keeping the temperature; carrying out stirring reaction for 2 hours; carrying out solid-liquid separation after reaction is carried out; carrying out washing by using deionized water and carrying out drying to obtain the diethylenetriamine modified banana fiber adsorbent. The adsorbent has the advantages of high adsorption capability on perfluorooctane sulfonate, low cost, greenness, environmental protection, high magnetism and high mechanical strength; moreover, the adsorbent can be repeatedly used for 100 times or above, and the adsorbent is easily separated.
Owner:UNIV OF JINAN
Method for determining perfluorooctanesulfonic acid and perfluorohexanesulfonic acid in edible parts of crops
ActiveCN106645490AEfficient removalHigh recovery rateComponent separationPerfluorohexanesulfonic acidSolid phase extraction
The invention belongs to the technical field of contaminant determination and discloses a method for determining perfluorooctanesulfonic acid and perfluorohexanesulfonic acid in edible parts of crops. The method comprises the main steps: freezing, drying and crushing the edible parts of the crops so as to obtain a sample, adding an internal standard substance into the sample, carrying out uniform mixing, then, adding a disassociation agent into the mixture for a disassociation reaction, then, adding tetrabutylammonium bisulfate and a sodium carbonate buffer solution into the reaction solution, carrying out uniform mixing thoroughly, then, adding methyl tert-butyl ether into the mixture for ultrasonic extraction, so as to obtain an extract; subjecting the extract to solid-phase extraction purification by graphite carbon black loaded WAX columellae so as to obtain sample detection liquid, and determining the sample detection liquid by adopting an HPLC-MS-MS method. According to the method disclosed by the invention, the recovery rate is high, the accuracy is good, the sensitivity is high, and the method is resistant to interference of complicated matrixes; meanwhile, the method is applicable to the determination on perfluorooctanesulfonic acid and perfluorohexanesulfonic acid in cereals, root vegetables, leaf vegetables and fruit vegetables.
Owner:JINAN UNIVERSITY
Calcium zinc fluorophosphates antirust powder
The invention relates to the technical field of coatings, and concretely relates to a calcium zinc fluorophosphates antirust powder. The antirust powder is obtained by adding 800-1200 mesh ultrafine zinc powder having an amount accounting for 0.5-20% of the total weight of the antirust powder into purified phosphate, adding nanometer titanium hydride powder having an amount accounting for 0.8-28% of the total weight of the antirust powder, and adding potassium perfluorooctanesulphonate, heptadecafluorooctanesulfonic acid tetraethylammonium salt and perfluorooctanesulfonic acid ammonium salt which account for 0.03-0.8% of the total weight of the antirust powder. The calcium zinc fluorophosphates antirust powder provided by the invention has the advantages of no pollution and high cost performance.
Owner:谭小毛
Method for detecting toxicity of PFOS (perfluorooctane sulfonate) in water through rotifers
The invention relates to a method for detecting biotoxicity of PFOS (perfluorooctane sulfonate) in water through rotifers, and belongs to the technical field of environmental detection. Particularly, the technical scheme comprises the steps that rotifers are selected as mode creatures, which are widely spread, quickly propagate, and have short generation time, and survival, propagation, activities and the like are sensitive to the variation of environment physical and chemical factors; the influence of the PFOS on the ecosystem can be evaluated through the change of the population density of rotifers caused by PFOS water solutions of different concentrations; and then the action mechanism of the PFOS can be confirmed through the influence of the PFOS on the life history of rotifers. The method overcomes the difficulties that the period is long and the operation is complicated during the biotoxicity detection for PFOS in water in the prior art, and provides the simple, convenient, sensitive and systemic method for detecting toxicity of PFOS in water; and the method is convenient, quick and low in cost.
Owner:BEIJING NORMAL UNIVERSITY
Method for detecting toxicity of perfluorooctane sulfonate in water by utilizing selenastrum capricornutum
InactiveCN107238687AOvercome the cycleOvercoming complexityTesting waterSelenastrumPerfluorooctanesulfonic acid
The invention relates to the technical field of detection and specifically relates to a method for detecting toxicity of perfluorooctane sulfonate in water by utilizing selenastrum capricornutum. The method comprises the following steps: 1) culturing selenastrum capricornutum; 2) performing a growth inhibition test; 3) detecting the influences of the perfluorooctane sulfonate in different concentrations on the growth rate of selenastrum capricornutum. The method for detecting toxicity of perfluorooctane sulfonate in water by utilizing selenastrum capricornutum provided by the invention solves the problems of long period and complex operation for determining the PFOA biotoxicity in water at present; a simple, sensitive and systemic method for detecting toxicity of perfluorooctane sulfonate in water is provided; and the method is convenient, quick and low in cost.
Owner:BEIJING UNIV OF CHEM TECH +1
Organic fuel cell methods and apparatus
InactiveUS7445859B2Improve ionic conductivityImprove stabilitySolid electrolytesFuel cells groupingOxygenOrganic fuel
A liquid organic, fuel cell is provided which employs a solid electrolyte membrane. An organic fuel, such as a methanol / water mixture, is circulated past an anode of a cell while oxygen or air is circulated past a cathode of the cell. The cell solid electrolyte membrane is preferably fabricated from Nafion™. Additionally, a method for improving the performance of carbon electrode structures for use in organic fuel cells is provided wherein a high surface-area carbon particle / Teflon™-binder structure is immersed within a Nafion™ / methanol bath to impregnate the electrode with Nafion™. A method for fabricating an anode for use in a organic fuel cell is described wherein metal alloys are deposited onto the electrode in an electro-deposition solution containing perfluorooctanesulfonic acid. A fuel additive containing perfluorooctanesulfonic acid for use with fuel cells employing a sulfuric acid electrolyte is also disclosed. New organic fuels, namely, trimethoxymethane, dimethoxymethane, and trioxane are also described for use with either conventional or improved fuel cells.
Owner:UNIV OF SOUTHERN CALIFORNIA +1
Preparation method of perfluorooctane sulfonic acid molecularly imprinted adsorbent on porous ceramic surface
InactiveCN107126939BSpecific recognition abilityHigh selectivityOther chemical processesWater contaminantsN dimethylformamideSorbent
Owner:UNIV OF JINAN
Solid Phase Extraction Analysis Method for Perfluorooctane Sulfonate in Wastewater
ActiveCN104977371BImprove representationReproducible and stableComponent separationLiquid chromatography mass spectroscopySolid phase extraction
The present invention discloses a solid-phase extraction analysis method of perfluorooctane sulfonic acid compounds in wastewater. The solid-phase extraction analysis method comprises: rinsing a solid-phase extraction column sequentially with 0.1% ammonium acetate-containing methanol, pure methanol and ultrapure water, and discarding the solutions after completing the rinsing; using a vacuum solid-phase extraction device to suck a wastewater sample, passing through the solid-phase extraction column, sequentially adding 2 mL of a solution containing acetone, acetonitrile and formic acid according to a ratio of 50:50:1, 3 mL of pure methanol and 3 mL of 0.1% ammonium acetate-containing methanol to carry out elution, and collecting and merging the eluent; blowing the eluent with nitrogen to approach a drying state, adding 1 mL of a solution containing methanol and water according to a ratio of 1:1, and uniformly mixing; and carrying out analysis testing through LC / MS / MS to obtain the result. According to the present invention, the sampling amount of the method is large, such that the samples have the good representativeness and can characterize the performance of the wastewater to the maximum extent; the operation process is simple and efficient, and the reproducibility of the laboratory data is stable; and the standard addition method recovery rate achieves 70%, the detection limit is low and is 0.01 [mu]g / L, the ecological requirements of the environment are met, and the tested compound variety is diverse.
Owner:深圳天祥质量技术服务有限公司
A magnetic molecularly imprinted polymer for separating and enriching perfluorooctane sulfonic acid and its preparation method
ActiveCN107082856BSmall particle sizeLarge specific surface areaOther chemical processesAlkali metal oxides/hydroxidesPerfluorooctanesulfonic acidMolecular imprinting
Owner:SOUTHWEST UNIV
Titanic acid nano material absorbent and preparation method thereof
InactiveCN101584977BImprove adsorption capacityEvenly dispersedOther chemical processesSorbentCarboxylic acid
The invention provides a titanic acid nano material absorbent for enriching and / or purifying the organic pollutant in the biological and / or environmental samples and a preparation method thereof. The absorbent provided by the invention is a titanic acid nano tube modified by a hydrophobic group and a hydrophilic group simultaneously, preferred a titanic acid nano tube modified by C18 and aminopropyl, which can be uniformly dispersed in the water solution and has high adsorption capacity and better selectivity to the perfluorochemical in virtue of the mixed mechanism of the hydrophobic functionand the electrostatic attraction, and is especially suitable for the enrichment and / or purification of the perfluorooctane sulfonate and the perfluorooctane carboxylic acid in the biological and / or environmental samples. The absorbent provided by the invention is prepared by a hydrothermal method and an sol-gel method. The reagent and device are simple and cheap and the repeatability is good.
Owner:RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
Two-dimensional graphene imprinted composite material, and preparation method and application thereof
ActiveCN108586653AEfficient CatalysisDirect preparationOther chemical processesPerfluorinated compoundPerfluorooctanesulfonic acid
The invention discloses a two-dimensional graphene imprinted composite material, and a preparation method and an application thereof, and belongs to the field of new materials. The inventors of the invention find that a graphene-hydrogen peroxide-acetylacetone system has a free radical regeneration process in order to mediate a free radical-initiated organic polymerization reaction, a molecularlyimprinted film is directly synthesized on the surface of graphene with perfluorooctane sulfonic acid as a template by using the above characteristic, and the two-dimensional graphene imprinted composite material is prepared without secondary modification of the film, so the composite material can selectively identify target molecules, maintain the good catalytic performance of graphene and ensurethe application and promotion in multiple fields. In addition, the graphene has a great specific surface area, has a high adsorption capacity for perfluorinated compounds, significantly increases thenumber of imprinting sites per unit area, and enhances the selective identification ability of the imprinted composite material.
Owner:HUBEI INSPECTION & QUARANTINE TECH CENT
Method for quantitatively detecting perfluorooctane sulfonate isomeride in water sample
ActiveCN102866225BRealize quantitative analysis and detectionSolve the problem of quantification errorComponent separationChemical treatmentSolid phase extraction
The invention provides a method for quantitatively detecting perfluorooctane sulfonate isomeride in a water sample, which belongs to the field of perfluorooctane sulfonate monitoring. The method for quantitatively detecting the perfluorooctane sulfonate isomeride in the water sample comprises the steps of (1) solid phase extraction: quantitatively taking the water sample, carrying out extraction with a solid phase extraction column, carrying out centrifugation to eliminate moisture in the extraction column after extraction, then purifying the dried extraction column by a buffer solution and methanol, eluting the purified extraction column with alkaline methanol, and collecting an eluant; (2) chemical processing of an extract: drying nitrogen of the eluant with wind, adding derivatization reagents, tetrabutylammonium hydroxide and methyl tertiary butyl ether, to be mixed, drying the solution nitrogen with wind, and adding the methyl tertiary butyl ether to be uniformly mixed so as to keep the volume constant; and (3) gas chromatography-mass spectrometric detection. The method successfully realizes the effective separation of the PFOS (perfluorooctane sulfonate) isomeride so as to realize the accurate and quantitative detection of the PFOS isomeride. Compared with the existing test technology, the method realizes the quantitative analysis and detection of the PFOS isomeride, and solves the problem of quantitative errors of PFOS.
Owner:NANJING UNIV
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