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| Number | Title | Issue Date |
| 7963720 | Polymer coated nanoparticle activation of oxidants for remediation and methods of use thereof Methods of decreasing the amount of one or more contaminants in contaminated soil comprise introducing polymer-coated nanoparticles into the contaminated soil, optionally with other reagents. The polymer-coated nanoparticles exhibit an enhanced ability to migrate th... | 06/21/2011 |
| 7914232 | Method for reclaiming lands polluted by hexavalent chromium A procedure for the on-site reduction to a predetermined level of the concentration of hexavalent chromium in a saturated or unsaturated contaminated area or ground, in which an in-depth treatment of this area or ground is carried out with a predetermined quantity o... | 03/29/2011 |
| 7896577 | Thixotropic gel for vadose zone remediation A thixotropic gel suitable for use in subsurface bioremediation is provided along with a process of using the gel. The thixotropic gel provides a non-migrating injectable substrate that can provide below ground barrier properties. In addition, the gel components pro... | 03/01/2011 |
| 7722292 | Soil decontamination by mechanically activated oxidation A method of performing soil decontamination including mechanically mixing the soil with solid oxidant prior to any addition of water and until an exothermic reaction between the oxidant and contaminants within the soil occur, adding only necessary water to obtain an... | 05/25/2010 |
| 7677836 | In-situ surfactant and chemical oxidant flushing for complete remediation of contaminants and methods of using same The present invention relates to the removal of subsurface contaminants and methods of using same. In more particular, but not by way of limitation, the present invention relates to an integrated method for remediating subsurface contaminants through the use of a lo... | 03/16/2010 |
| 7645092 | Treatment of in ground chromium ore processing residue In methods for treatment of in ground chromium ore processing residue contamination, ferrous sulfide is provided as a substantially insoluble material in the residue deposit. The ferrous sulfide accordingly may remain substantially in place, in the pores of the soil... | 01/12/2010 |
| 7635236 | In situ remediation of inorganic contaminants using stabilized zero-valent iron nanoparticles A method for preparing highly stabilized and dispersible zero valent iron nanoparticles and using the nanoparticles as a remediation technology against inorganic chemical toxins in contaminated sites. The method employs a composition containing select polysaccharide... | 12/22/2009 |
| 7585132 | Method for remediating a contaminated site A method of amending an aquifer having at least one contaminant comprising the steps of: mixing a sorbent material with a carrier to form a slurry, the sorbent material having one dimension of at least 1 micron; and introducing the slurry into the aquifer in a dispe... | 09/08/2009 |
| 7553105 | Method and compositions for treatment of subsurface contaminants Compositions and methods are provided for oxidizing subsurface contaminants. Compositions include compatible combinations of surfactants, cosolvents and chemical oxidants. Compositions have been identified that provide compatible combinations of surfactants and chem... | 06/30/2009 |
| 7524141 | Treatment of environmental contaminants Contaminants, such as volatile organic compounds, are removed from an environmental medium, such as contaminated soil, rock, groundwater, waste water and the like, by treatment with a combination of a persulfate, such as a sodium persulfate, and hydrogen peroxide. | 04/28/2009 |
| 7427177 | Method of using pulsed ozone to treat soils containing organic contaminants A method of treating a solid matrix containing organic contaminants is provided. The method comprises the steps of a) injecting ozone into the solid matrix for a period of time known as the pulse duration; b) interrupting the injection of ozone into the solid matrix... | 09/23/2008 |
| 7399141 | System for removing contaminants from soil A method and system for removing contaminants from contaminated soil at a site utilizes particle size segregation and particle density segregation to yield a plurality of fractions, whereby each of the fractions are tested and identified for the presence of unaccept... | 07/15/2008 |
| 7361283 | Extraction and treatment of heavy metals Contaminated waste streams or soil or sludge is subjected to a first treatment stage with an acid liquor at a pH below 2 and at a solids content from 5 to 30%; then the liquid and solid phases from the first treatment stage are separated; the solids from the first t... | 04/22/2008 |
| 7347647 | Composite material for a permeable reactive barrier Compositions in accordance with the principles of the present invention comprise a compressed mixture of fibrous organic materials and multi-valent metals used to remove organic chemical contaminants. The compositions are made into a pre-shaped, compressed form used... | 03/25/2008 |
| 7334965 | Method for treating a body of a polluted porous medium A method for treating a body of a polluted porous medium, includes the steps of: preparing a reactive solution containing nanoparticles; injecting the reactive solution into the body of the polluted porous medium so as to decompose pollutants in the polluted porous ... | 02/26/2008 |
| 7311851 | Apparatus and method for reactive atom plasma processing for material deposition Reactive atom plasma processing can be used to shape, polish, planarize, and clean surfaces of difficult materials with minimal subsurface damage. The apparatus and methods use a plasma torch, such as a conventional ICP torch. The workpiece and plasma torch are move... | 12/25/2007 |
| 7301066 | Method of making and using nanoscale metal Methods of treating ground water and methods for reducing contaminants (e.g., chlorinated compounds in contaminated ground water) to harmless compounds in the presence of an elemental metal treatment composition. Said methods comprise injecting a treatment solution ... | 11/27/2007 |
| 7290959 | Electrode heating with remediation agent A remediation method and system is disclosed. A plurality of conductors is installed into the subsurface to introduce electrical current to produce heat in the subsurface. One or more agents are released into the subsurface to cause or accelerate the decomposition o... | 11/06/2007 |
| 7285219 | Chromatographic separation member and method There is described a chromatographic separation member including a substrate carrying on at least one surface a thin layer of a chromatographically active capture material. Also described is a chromatographic separation method for separating a component of interest ... | 10/23/2007 |
| 7270499 | Soil and/or groundwater remediation process A method of treating contaminants in soil and/or groundwater including adding a source of a peroxide and ozone to the in situ environment in amounts capable of producing reactive species sufficient to oxidize at least one of the contaminants without acidification of... | 09/18/2007 |
| 7264419 | System and method for remediating contaminated soil and groundwater in situ A system and method for the in-situ removal or remediation of contaminants in a soil formation containing a subsurface groundwater aquifer, the method comprising the steps of: injecting a first oxidant into the aquifer at an injection point to create a volume of inf... | 09/04/2007 |
| 7264734 | Method for treating dredged material The present invention provides a method for treating dredged material in which liquid is first added to the dredged material, and dewatering the dredged material to obtain a filtrate and a solid portion. Contaminants are removed from the dredged material by at least... | 09/04/2007 |
| 7255514 | Method and system for removing contaminants from soil A method and system for removing contaminants from contaminated soil at a site utilizes particle size segregation and particle density segregation to yield a plurality of fractions, whereby each of the fractions are tested and identified for the presence of unaccept... | 08/14/2007 |
| 7255791 | In situ method and apparatus for biodegradation of alkyl ethers and tertiary butyl alcohol A method and apparatus for the in situ purification of aquifers contaminated with ethers and/or alcohols using a bacterial culture, a method of delivering the culture to the subsurface, and an oxygen delivery system. ... | 08/14/2007 |
| 7235181 | Metal powder for decomposition of organic halogen and method for manufacturing the same The present invention is to provide metal powder capable of decomposing and remedying various range of organic halogen compounds including organic halogen compounds which are difficult to be decomposed by a conventional decomposition and remediation method. Metal po... | 06/26/2007 |
| 7220366 | Process for purifying contaminated soil or groundwater with iron particles Iron particles for purifying soil or ground water of the present invention comprise a mixed phase of α-Fe phase and Fe3O4 phase, and having a BET specific surface area of 5 to 60 m2/g, an Fe content of not less than 75% by weight ba... | 05/22/2007 |
| 7217755 | Organic/inorganic nanocomposites, methods of making, and uses as a permeable reactive barrier Nanocomposite materials having a composition including an inorganic constituent, a preformed organic polymer constituent, and a metal ion sequestration constituent are disclosed. The nanocomposites are characterized by being single phase, substantially homogeneous m... | 05/15/2007 |
| 7213642 | Multi-fluid sparging A diffuser useful for sparging to remove contaminant in situ is described. The diffuser includes a first elongated member having a sidewall with a first portion of the length of the sidewall being microporous, and a second portion of the length of the sidewall havin... | 05/08/2007 |
| 7204660 | Humic mineral reagent and method for the production thereof, method for rehabilitating polluted soils, method for detoxification of wastes of extracted and processed mineral products and recultivating rock dumps and tailing storages, method for sewage water treatment and method for sludge utilisation The humic-mineral agent from naturally occurring carbon-series humites and caustobioliths comprises humic acids and salts thereof, naturally hydrated humic acids, hydrolyzed humic acids, hydrated and hydrolyzed humic-mineral and mineral complexes of parent carbon-se... | 04/17/2007 |
| 7175770 | Methods and systems for groundwater remediation The present invention provides systems and methods for the remediation of contaminated water, soils and/or sediments. In some embodiments, the system includes one or more conduits for injection of hydrogen peroxide and ozone based reagents. ... | 02/13/2007 |
| 7166759 | Remediation method of media and iron powder for dehalogenation of hydrogenated hydrocarbons The invention provides a remediation method of soil, water and/or gases by prompt dehalogenation of halogenated hydrocarbons by allowing the halogenated hydrocarbons contained at least in one of the soil, water and/or gases to contact an iron powder containing about... | 01/23/2007 |
| 7160060 | System and method of remediation of contaminants The present invention discloses a remediation system and method of use thereof for degrading contaminants, including chlorinated organics, volatile organic chemicals, and polycyclic aromatic hydrocarbons. The system includes an oxygen source and pentane. The system ... | 01/09/2007 |
| 7160471 | In-situ generation of oxygen-releasing metal peroxides A method for remediation of contaminants in soil and groundwater is disclosed. The method generates oxygen releasing solids in groundwater or soil by injecting an aqueous energetic oxidant solution containing free radicals, oxidative conditions can be created within... | 01/09/2007 |
| 7140805 | Method of treating municipal solid waste One aspect of the present invention relates to a method of treating municipal solid waste which includes landfilling a volume of solid waste, a substantial portion of which has been exposed to the atmosphere, adding moisture to the solid waste, compacting the moiste... | 11/28/2006 |
| 7138059 | Environmental bioremediation using shell as an electron donor A method for in situ bioremediation of contaminants in the environment is described. The method includes adding an electron donor to ground water in an amount sufficient for a microbe in the ground water to use the electron donor for reducing the contaminant into an... | 11/21/2006 |
| 7128498 | Method of containing and at least partially remediating contaminants in soils, including sediments In one application for containing and remediating contaminants in sediments, employing a geocomposite eliminates the need for a thick cap or removal and subsequent ex situ treatment of the sediment. A geocomposite with at least one layer of reactive material is plac... | 10/31/2006 |
| 7108455 | Carbureted bioventing for enhanced control of in-situ bioremediation A method for removing volatile and semi-volatile contaminants from groundwater in which the contaminants are stripped from the groundwater by sparging with an inert carrier gas and the stripped contaminants are transported into a bioactive zone into which at least o... | 09/19/2006 |
| 7101115 | stabilization of persistent hydrophobic organic contaminants in sediments using coal- and wood-derived carbon sorbents To overcome obstacles faced by current remediation technologies for contaminated sediments, the present invention provides a new strategy based on in situ control of hydrophobic organic contaminants (HOC) bioavailability. The strategy employs the addition of activat... | 09/05/2006 |
| 7056061 | Remediation of contaminates including low bioavailability hydrocarbons A method of treatment of a contaminated material contaminated with an organic compound. The method includes treating the contaminate with a bioremediation step followed by a chemical oxidation step. The bioremediation step includes contacting the contaminate with a ... | 06/06/2006 |
| 7033492 | Groundwater and subsurface remediation A method of treating a site containing contaminants and apparatus are described The method and apparatus sparges the site with an air/ozone gas stream delivered with a hydroperoxide, which is a substantial byproduct of a reaction of a contaminant present in the aqui... | 04/25/2006 |
