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4455results about "Radioactive decontamination" patented technology
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Membrane based fluid treatment systems
InactiveUS7186344B2Readily availableImprove the level ofLiquid separation auxillary apparatusIon-exchanger regenerationMembrane foulingTreatment system
A process for removing soluble and insoluble inorganic, organic, and microbiological contaminants from a fluid stream employing a pretreatment module, a post-treatment module, a recycle stream module or any combination thereof, and a membrane module, is provided. The process provided reduces the problems associated with membrane fouling and increases contaminant removal capacity.
Owner:WATERVISIONS INT
Composition and method for forming a sprayable materials cover
InactiveUS20050084334A1Improve performanceImprove adhesionSolid waste disposalLandfill technologiesWater dispersibleSlurry
An alternative cover for landfill may be formed from a slurry mixture of water, cementitious binder, adhesion enhancing admixture and fiber. These constituents may be mixed and applied to cover landfilled wastes, granular material piles or for soil erosion control. The cover will harden to minimize water infiltration, wind blown dust, odor and affinity to birds, flies and other insects. The water may include tap water, landfill leachate and wastewater. The binder may include Portland cement, blended cement, cement kiln dust, class C fly ash, and / or calcium sulphate hemihydrate. The adhesion enhancing admixture includes water-dispersible polymers. The fibers may comprise shredded paper or wood or plastic fibers.
Owner:CJS TECH
Method for producing chemically bonded phosphate ceramics and for stabilizing contaminants encapsulated therein utilizing reducing agents
Known phosphate ceramic formulations are improved and the ability to produce iron-based phosphate ceramic systems is enabled by the addition of an oxidizing or reducing step during the acid-base reactions that form the phosphate ceramic products. The additives allow control of the rate of the acid-base reactions and concomitant heat generation. In an alternate embodiment, waste containing metal anions are stabilized in phosphate ceramic products by the addition of a reducing agent to the phosphate ceramic mixture. The reduced metal ions are more stable and / or reactive with the phosphate ions, resulting in the formation of insoluble metal species within the phosphate ceramic matrix, such that the resulting chemically bonded phosphate ceramic product has greater leach resistance.
Owner:THE UNITED STATES AS REPRESENTED BY THE DEPARTMENT OF ENERGY
System and method for monitoring water content or other dielectric influences in a medium
Owner:BATTELLE ENERGY ALLIANCE LLC +1
Process for the excavation of buried waste
ActiveUS7114880B2Preventing particulate emissionMachines/dredgers working methodsFouling preventionRadioactive contaminationEnvironmental engineering
Disclosed is a method of excavating large quantities of non-homogenous radioactive contaminated waste, desirably without releasing radioactive contaminated dust or exposing personnel to its hazards. The excavation of buried waste is performed in the presence of a suppression fluid that coats the waste and captures and retains particles so that they do not become airborne. Use of this suppression fluid technique allows larger mechanized excavation equipment to be used to perform the work. This keeps workers away from the waste. The waste is excavated and placed inside large steel boxes, such as a roll-off box, by the excavator. The suppression fluid covers the waste in the boxes and prevents particulate emissions from the waste.
Owner:CARTER JR ERNEST E
Apparatus suitable for transporting and storing nuclear fuel rods and methods for using the apparatus
InactiveUS6064710ARugged and convenient to handleHighly effectiveReactor fuel elementsPortable shielded containersHoneycombHoneycomb like
Apparatus suitable for transporting and storing nuclear fuel rods comprising a basket having storage cells formed from a honeycomb gridwork of metal plates in a rectilinear configuration, the plates welded to each other at their intersections so that all contiguous corners of the storage cells formed by the gridwork are completely connected so as to allow conduction heat transfer, the metal plates having neutron absorber material positioned in areas which form walls of the storage cells. Method of making an apparatus suitable for transporting and storing nuclear fuel rods comprising a) providing metal plates having slots and having neutron absorber material positioned on sides of the metal plates, b) arranging the plates so that the slots intersect to form a honeycomb gridwork of storage cells having contiguous corners and having the neutron absorbing material on sides of the storage cells, and c) welding the plates to each other at their intersections so that all contiguous corners of the storage cells formed by the gridwork are completely connected so as to allow conduction heat transfer and to provide a rigid structure.
Owner:SINGH KRIS
Reactive compositions for fluid treatment
InactiveUS6861002B2Easy to disassembleImprove efficiencyPerfluorocarbons/hydrofluorocarbons captureLoose filtering material filtersCystFiltration
A method and device for the chemical conversion, filtration and / or purification of fluids water or other solutions containing microbiological and chemical contaminants, such as fluids containing arsenic, chlorine, bacteria, viruses, and cysts, where the fluid is passed through a purification material composed of fluid treatment carbon, metal phosphates, metal oxides, reduced metals, metal silicates, metal sulfates, metal carbonates, metal hydroxides, or combinations thereof. The material may be included in a fixed binder matrix.
Owner:WATERVISIONS INT
Production and use of biosolid granules
This invention relates to the production and use of encapsulated and / or concentrically-constructed fertilizer or bioremediation granules such as, for example, granules of 0.5 mm to 10 mm in diameter constructed so that there are at least two components to the granule including a core with a surrounding capsule or a core with one or more concentric layers that are distinguishable from the core with respect to nutrient content, density, hardness, solubility, composition, microbial content and permeability, as in permeability to odors or the permeability of nutrients that might volatize to the atmosphere or leach into the soil. The basic idea was to create a method for manufacturing and using fertilizer granules, which incorporate multiple concentric layers or a core plus an encapsulating outer layer.
Owner:UNIFIED ENVIRONMENTAL SERVICES GROUP
Reactive compositions for fluid treatment
InactiveUS20030196966A1Perfluorocarbons/hydrofluorocarbons captureLoose filtering material filtersFiltrationPhosphate
A method and device for the chemical conversion, filtration and / or purification of fluids water or other solutions containing microbiological and chemical contaminants, such as fluids containing arsenic, chlorine, bacteria, viruses, and cysts, where the fluid is passed through a purification material composed of fluid treatment carbon, metal phosphates, metal oxides, reduced metals, metal silicates, metal sulfates, metal carbonates, metal hydroxides, or combinations thereof. The material may be included in a fixed binder matrix.
Owner:WATERVISIONS INT
Method and system for treating contaminated materials
ActiveUS8348551B2Lower Level RequirementsDomestic stoves or rangesContaminated soil reclamationMobile vehicleConductive materials
Provided is a method for treating contaminated soil. The method includes providing contaminated soil in a soil chamber that has at least one wall, and at least one floor, at least one heater coupled to or inside of at least one of the walls and at least one substantially elongated floor heater coupled to or in the floor. At least one of the walls at least partially includes a thermally conductive material configured to transfer heat from at least one of the heaters to an interior of the soil chamber. At least one of the walls at least partially encloses an interior of the soil chamber. At least one of the walls can move between a closed position during heating of the soil chamber, and an open position that allows a soil moving vehicle to access an interior of the soil chamber to provide or remove soil to and from the soil chamber unencumbered by piping located within the soil volume. The method also includes heating the contaminated soil within the soil chamber to substantially reduce the level of contaminants in the contaminated soil.
Owner:TERRATHERM
Methods for adsorption and retention of solvated compounds and ions
InactiveUS6811703B2Avoid leachingImprove water holding capacityIon-exchange process apparatusOther chemical processesGolf course turfIon exchange
A solid phase mixed solvent polymer, compositions and methods for removing and retaining solvated organic compounds and inorganic ions from water, wastewater, superficial and ground water, soil and other environmental sources, a soil amendment and method resulting from adhesively coating the polymer onto sand along with at least one ion exchange material, and methods for the containment, reduction, and prevention of organic leaching from soils, agricultural, industrial, and commercial environments, and in particular, sports and athletic turf facilities such as golf courses where pesticides are frequently applied.
Owner:ECO VERDE TECH
Process for preparing reactive compositions for fluid treatment
InactiveUS20030196960A1Improve efficiencyReduce hydrophobicityOther chemical processesIon-exchanger regenerationFiltrationCompound (substance)
A method and device for filtration and / or purification of fluids water or other solutions containing microbiological and chemical contaminants, such as fluids containing metals, water treatment chemicals, reactive chemicals and microorganisms, where the fluid is passed through a composite material composed of fluid treatment media with or without a binder matrix in which the filtration media, binder, or support structures, or a combination thereof contains a surface treatment.
Owner:WATERVISIONS INT
Methods of recovering hydrocarbons from hydrocarbonaceous material using a constructed infrastructure and associated systems
ActiveUS20080190818A1Reduce processing costsIncrease volume outputThermal non-catalytic crackingSolid waste disposalEngineeringHydrocarbon
A method of recovering hydrocarbons from hydrocarbonaceous materials can include forming a constructed permeability control infrastructure. This constructed infrastructure defines a substantially encapsulated volume. A comminuted hydrocarbonaceous material can be introduced into the control infrastructure to form a permeable body of hydrocarbonaceous material. The permeable body can be heated sufficient to remove hydrocarbons therefrom. During heating the hydrocarbonaceous material is substantially stationary as the constructed infrastructure is a fixed structure. Removed hydrocarbons can be collected for further processing, use in the process, and / or use as recovered.
Owner:RED LEAF RESOURCES
Methods of preparing a surface-activated titanium oxide product and of using same in water treatment processes
InactiveUS6919029B2Inhibit dissolution and migrationMaterial nanotechnologyOther chemical processesHigh rateTitanium
A method for producing a surface-activated crystalline titanium oxide product having a high adsorptive capacity and a high rate of adsorption with respect to dissolved contaminants includes the steps of preparing a titanium oxide precipitate from a mixture comprising a hydrolysable titanium compound and heating the precipitate at a temperature of less than 300° C., without calcining the precipitate. Preferably, the titanium oxide product includes crystalline anatase having primary crystallite diameters in the range of 1-30 nm. The surface-activated crystalline titanium oxide product is used in methods to remove dissolved inorganic contaminants from dilute aqueous streams by suspending the product in an aqueous stream or by filtering an aqueous stream through a bed of the product. In another method, a hydrolysable titanium compound is added to an aqueous stream so that titanium oxides form as a co-precipitate with dissolved contaminants within a bed of particulate material.
Owner:STEVENS INSTITUTE OF TECHNOLOGY
Method of separation and recovery of elements from radioactive liquid wastes
InactiveUS6843921B2Efficient elutionImprove efficiencyOther chemical processesSolid sorbent liquid separationRare-earth elementElution
A method of separation and recovery of elements from radioactive liquid wastes, includes a step of bringing into contact a high-level radioactive liquid waste containing separation target elements including Americium, Curium, Zirconium, Molybdenum, Palladium and rare earth elements with solid absorbent containing organophosphorus compounds so that the separation target elements are absorbed in the solid absorbent, a step of bringing into contact the solid absorbent with an acidic solution containing diethylenetriaminepentaacetic acid so that Americium, Curium, Zirconium, Molybdenum, Palladium and heavy rare earth elements are eluted from the solid absorbent, and a step of bringing into contact the solid absorbent underwent the first elution step with water or dilute nitric acid so that light rare earth elements are eluted from the solid absorbent. With the method, elements, which include Americium, Curium, Zirconium, Molybdenum, Palladium and rare earth elements, are efficiently and economically separated and recovered from the radioactive liquid waste.
Owner:JAPAN ATOMIC ENERGY AGENCY INDEPENDANT ADMINISTRATIVE CORP +1
Leachate and wastewater remediation system
InactiveUS6960301B2Effective amount of reactionMany difficultyLiquid separation by electricityFlow mixersAdvanced oxidation processFiltration
A compact portable modular wastewater treatment system which integrates several processing technologies to provide a substantially purified water source. A wastewater stream is sent through an initial filtration step. The filtered wastewater is then subjected to electrocoagulation and then further filtered. The resulting stream containing substantially only organics is then treated in an advanced oxidation process which can include passing an electrical current through the water during the oxidation process. The partially treated water is then passed through ion-exchange columns to polish ammonium and other contaminants. The ion-exchange columns are cycled through regeneration cycles to provide continuous ion-exchange medium. The ammonium rich brine solution used in regeneration is subjected to an ammonium destruct process and then reused in regenerating ion-exchange columns. The water can then be sent through a final disinfection oxidation process to destroy or inactivate pathogens and / or remove any remaining colorants or odor to provide a water source suitable for almost any use.
Owner:NEW EARTH SYST
Chelating agent modified graphene oxides, methods of preparation and use
InactiveUS20120330044A1Improve performanceSilicon organic compoundsMaterial nanotechnologyGrapheneOxide
The invention is directed to chelating agent modified graphene oxides having the following formula G(AB)x; wherein G is graphene oxide, A is selected from the group consisting of —(CH2)m—, —NH—, —S—, —O—Si(—OR1)2(—CH2)m—, —C(═O)—, —C(═O)—O—, —C(═O)—O(CH2)m—, —C(═O)—NH—, —C(═O)—NH—(CH2)m—, —P(═O)2—O—, wherein m is 1-12 and R1 is H, or C1-C12 alkyl; and B is a chelating moiety; wherein the ratio of basic graphene oxide units:x is from about 1:0.00001 to about 1:0.5. Such chelating modified graphene oxides have broad applications in diverse technical fields.
Owner:JINING LEADERNANO TECH L L C
Production and use of biosolid granules
This invention relates to the production and use of encapsulated and / or concentrically-constructed fertilizer or bioremediation granules such as, for example, granules of 0.5 mm to 10 mm in diameter constructed so that there are at least two components to the granule including a core with a surrounding capsule or a core with one or more concentric layers that are distinguishable from the core with respect to nutrient content, density, hardness, solubility, composition, microbial content and permeability, as in permeability to odors or the permeability of nutrients that might volatize to the atmosphere or leach into the soil. The basic idea was to create a method for manufacturing and using fertilizer granules, which incorporate multiple concentric layers or a core plus an encapsulating outer layer.
Owner:UNIFIED ENVIRONMENTAL SERVICES GROUP
Carbon-coated metal oxide nanoparticles
InactiveUS6843919B2Effective airborne decontaminationProvide protectionMaterial nanotechnologySolid sorbent liquid separationMetal oxide nanoparticlesToxin
Composites for destroying chemical and biological agents such as toxins and bacteria, and methods of preparing and using those composites are provided. According to the invention, the substance to be destroyed is contacted with the inventive composites which comprise finely divided metal oxide nanoparticles at least partially coated with carbon. Advantageously, the composites exclude water while not excluding the target compound or adsorbates. The desired metal oxide nanoparticles can be pressed into pellets for use when a powder is not feasible. Preferred metal oxide nanoparticles include MgO, SrO, BaO, CaO, TiO2, ZrO2, FeO, V2O3, V2O5, Mn2O3, Fe2O3, NiO, CuO, Al2O3, SiO2, ZnO, Ag2O, and mixtures thereof.
Owner:KANSAS STATE UNIV RES FOUND
Systems and methods for measuring a parameter of a landfill including a barrier cap and wireless sensor systems and methods
InactiveUS7187299B2Long-term monitoringGood suitElectric signal transmission systemsSolid waste disposalLine sensorRadio frequency
A method of measuring a parameter of a landfill including a cap, without passing wires through the cap, includes burying a sensor apparatus in the landfill prior to closing the landfill with the cap; providing a reader capable of communicating with the sensor apparatus via radio frequency (RF); placing an antenna above the barrier, spaced apart from the sensor apparatus; coupling the antenna to the reader either before or after placing the antenna above the barrier; providing power to the sensor apparatus, via the antenna, by generating a field using the reader; accumulating and storing power in the sensor apparatus; sensing a parameter of the landfill using the sensor apparatus while using power; and transmitting the sensed parameter to the reader via a wireless response signal. A system for measuring a parameter of a landfill is also provided.
Owner:BATTELLE ENERGY ALLIANCE LLC
Portable gas monitor
ActiveUS20080127726A1Easy to identifyEasily obtain informationElectric/magnetic detection for well-loggingSolid waste disposalControl unitElectrical and Electronics engineering
A portable monitor used to measure landfill gas and landfill well parameters. The portable monitor includes a control unit and a measuring unit that can communication wirelessly with one another. The control unit and / or measuring unit can includes a heating arrangement to increase the temperature of one or more components in the control unit and / or measuring unit in cold environments.
Owner:ELKINS EARTHWORKS
Application of metal-organic framework functional material
ActiveCN105214612AImprove adsorption capacityHigh removal rateOther chemical processesRadioactive decontaminationIonMetal-organic framework
The invention discloses an application of a metal-organic framework functional material, and belongs to the technical field of water processing. A metal-organic framework material is subjected to pre-modification and post-modification, and a series of different functional groups are introduced to an organic ligand or an inorganic metal cluster of the material. The metal-organic framework functional material is used as an adsorbent for removing radioactive ions from nuclear waste. The metal-organic framework material containing sulfate radicals and sulfonate radicals has a preferable adsorption effect on 133Ba<2+>; the maximum removal rate can reach 99.9%; and adsorption equilibrium can be achieved in 5min. By using the functionalized metal-organic framework material, a simple, easy, efficient, and fast novel method is provided for removing 133Ba<2+> from the nuclear waste. The metal-organic framework functional material has significant industrial application value with respect to nuclear pollution management.
Owner:BEIJING UNIV OF CHEM TECH
Composite materials and techniques for neutron and gamma radiation shielding
ActiveUS20050258405A1Safe and cost-effective managementIncrease volumeDiffusing elementsNuclear engineering solutionsPolymer modifiedRadioactive waste
This invention deals with multi-component composite materials and techniques for improved shielding of neutron and gamma radiation emitting from transuranic, high-level and low-level radioactive wastes. Selective naturally occurring mineral materials are utilized to formulate, in various proportions, multi-component composite materials. Such materials are enriched with atoms that provide a substantial cumulative absorptive capacity to absorb or shield neutron and gamma radiation of variable fluxes and energies. The use of naturally occurring minerals in synergistic combination with formulated modified cement grout matrix, polymer modified asphaltene and maltene grout matrix, and polymer modified polyurethane foam grout matrix provide the radiation shielding product. These grout matrices are used as carriers for the radiation shielding composite materials and offer desired engineering and thermal attributes for various radiation management applications.
Owner:SAYALA DASHARATHAM
Processes for water treatment
InactiveUS7077963B2Low costEconomical and efficientWaste water treatment from quariesSolid waste disposalSufficient timeMagnesium ion
The invention provides compositions comprising bauxite refinery residues that have been reacted with sufficient calcium and magnesium ions that they have a reaction pH of less than 10.5, and one or more water treating additives. The invention also provides processes for treatment of water containing dissolved inorganic substances involving stepwise treatment of the water in which the reacted bauxite refinery residues are added after the addition of a pH-raising additive. The invention also provides processes for treatment of water containing dissolved inorganic substances in which the reacted bauxite refinery residues are added stepwise, with one or more water treating additives also being added in at least one of the steps. The invention also provides a process for the neutralisation of bauxite refinery residue by reacting it with a base amount and a treating amount of calcium ions and a base amount and a treating amount of magnesium ions for a time sufficient to produce an at least partially-neutralized residue exhibiting a reaction pH of less than 10.5.
Owner:NAUVEAU TECH INVESTMENTS
Acid zirconium phosphate and alkaline hydrous zirconium oxide materials for sorbent dialysis
ActiveUS8409444B2Avoid disadvantagesRestore balanceCation exchanger materialsSolvent extractionIon exchangeDialysis fluid
Owner:FRESENIUS MEDICAL CARE HLDG INC
Nuclear Assisted Hydrocarbon Production Method
InactiveUS20100105975A1Reduced availabilityMinimized in sizeFluid removalShieldingHydrogenFormation fluid
A method is disclosed for the temporary or permanent storage of nuclear waste materials comprising the placing of waste materials into one or more repositories or boreholes constructed into an unconventional oil formation. The thermal flux of the waste materials fracture the formation, alters the chemical and / or physical properties of hydrocarbon material within the subterranean formation to allow removal of the altered material. A mixture of hydrocarbons, hydrogen, and / or other formation fluids are produced from the formation. The radioactivity of high-level radioactive waste affords proliferation resistance to plutonium placed in the periphery of the repository or the deepest portion of a borehole.
Owner:BAIRD JAMES RUSSELL
Process for preparing reactive compositions for fluid treatment
InactiveUS6833075B2Improve efficiencyReduce hydrophobicityIon-exchanger regenerationTreatment involving filtrationFiltrationCompound (substance)
Owner:WATERVISIONS INT
Techniques and compositions for shielding radioactive energy
InactiveUS20060074141A1Other chemical processesNuclear engineering problemsRadiation shieldNuclear chemistry
Techniques and compositions are provided for shielding radioactive energy. The composition includes a hydrocarbon component and a radiation shielding and absorbing material or additive. The composition may be applied to substrates or to radioactive materials. Moreover, the composition may be mixed with raw materials of products.
Owner:TERRY INDS
Method for treating radioactive wastewater
ActiveCN103177784AImprove processing precisionReduce competitionGeneral water supply conservationRadioactive contaminantsStrong acidsIon exchange
The invention discloses a method for treating radioactive wastewater. The method for treating the radioactive wastewater comprises the steps of firstly carrying out reverse osmosis treatment on the radioactive wastewater, then enabling the radioactive wastewater to enter a continuous electrodeionization unit to be treated, and further removing radionuclide so as to enable treated wastewater to reach discharge requirements; and respectively filling different mixed ion exchange resin in a plain water chamber and a thick water chamber in a continuous electrodeionization membrane stack of the continuous electrodeionization unit, wherein mixed ion exchange resin filled in the plain water chamber comprises, by volume ratio, 30%-60% of strong-acid cation exchange resin, 40%-60% of strong-base anion exchange resin, and 0%-30% of weak-base anion exchange resin, mixed ion exchange resin filled in the thick water chamber comprises, by volume ratio, 20%-50% of strong-acid cation exchange resin, and the balance strong-base anion exchange resin. A weak dissociation polymer portion is used for improving selectivity of continuous electrodeionization membrane stack to trace amount radionuclide, radionuclide with extremely concentration can be effectively removed, and the method for treating the radioactive wastewater ensures that the final discharged water satisfies the discharge requirements.
Owner:BEIJING QINGHE CHAOHUA TECH CO LTD
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