Class / Patent application number | Description | Number of patent applications / Date published |
210688000 | Heavy metal | 78 |
20080197081 | Compositions and Methods For Removing Arsenic in Water - Compositions and methods and for contaminants from water are provided. The compositions comprise ferric hydroxide and ferric oxyhydride coated substrates for use in removing the contaminant from the water Contacting water bearing the contaminant with the substrates can substantially reduce contaminant levels therein. Methods of oxidizing the contaminants in water to facilitate their removal by the ferric hydroxide and ferric oxyhydride coated substrates are also provided. The contaminants include, but are not limited to, arsenic, selenium, uranium, lead, cadmium, nickel, copper, zinc, chromium and vanadium, their oxides and soluble salts thereof. | 08-21-2008 |
20080230481 | Process for the Removal of Catalytic Metals and Promoter Metals from Carbonylation Process Streams - A process for the selective removal of Group VIII carbonylation catalyst metals and/or promoter metals from liquid compositions comprising a carbonylation product, the Group VIII carbonylation catalyst metals and/or promoter metals, corrosion metals and optionally alkali or alkaline earth metals. The process comprises contacting the liquid composition with a chelating resin having thiourea functional groups. The process is suitable for treating process streams obtained in the production of carboxylic acids and/or carboxylic anhydrides. | 09-25-2008 |
20080302727 | Coupling agent-reacted mercury removal media - The use of a coupling agent containing a mercapto, disulfide, tretrasulfide and/or polysulfide end group provides a mercury removal media having increased reactivity, stability, and mercury removal ability. The mercury removal media described herein is prepared by reacting an organophilic clay containing onium ions with a mercapto, disulfide, tetrasulfide, and/or polysulfide end moiety. Alternatively, the clay can be made organophilic by onium ion reaction prior to or simultaneously with the coupling reaction of the mercapto- or sulfide- end group-containing coupling agent. | 12-11-2008 |
20080302728 | Sulfur-impregnated organoclay mercury and/or arsenic ion removal media - The use of a sulfur-impregnated organoclay provides a mercury or arsenic removal media having increased reactivity, stability, and mercury removal ability. The Hg/As removal media described herein is prepared by impregnating an organophilic clay with elemental (free state) sulfur. Alternatively, the clay can be made organophilic by onium ion reaction prior to or simultaneously with impregnating the organoclay with sulfur. | 12-11-2008 |
20080302729 | Sulfur-impregnated and coupling agent-reacted organoclay mercury and/or arsenic ion removal media - The use of two mercury and arsenic removal media: A) a sulfur-impregnated organoclay; and B) a coupling agent-reacted organoclay, wherein the coupling agent preferably contains a mercapto, disulfide, tretrasulfide and/or polysulfide end group provides mercury removal media having increased reactivity, stability, and synergistic mercury removal ability. The preferred mercury removal media described herein is prepared by reacting an organophilic clay containing onium ions A) with elemental sulfur; and B) with a sulfur-containing coupling agent, preferably containing a mercapto, disulfide, tetrasulfide, and/or polysulfide moiety. | 12-11-2008 |
20080302730 | SULFUR-IMPREGNATED ORGANOCLAY MERCURY AND/OR ARSENIC ION REMOVAL MEDIA - The use of a sulfur-impregnated organoclay provides a mercury or arsenic removal media having increased reactivity, stability, and mercury removal ability. The Hg/As removal media described herein is prepared by impregnating an organophilic clay with elemental (free state) sulfur. Alternatively, the clay can be made organophilic by onium ion reaction prior to or simultaneously with impregnating the organoclay with sulfur. | 12-11-2008 |
20080302731 | SULFUR-IMPREGNATED AND COUPLING AGENT-REACTED ORGANOCLAY MERCURY AND/OR ARSENIC ION REMOVAL MEDIA - The use of two mercury and arsenic removal media: A) a sulfur-impregnated organoclay; and B) a coupling agent-reacted organoclay, wherein the coupling agent preferably contains a mercapto, disulfide, tretrasulfide and/or polysulfide end group provides mercury removal media having increased reactivity, stability, and synergistic mercury removal ability. The preferred mercury removal media described herein is prepared by reacting an organophilic clay containing onium ions A) with elemental sulfur; and B) with a sulfur-containing coupling agent, preferably containing a mercapto, disulfide, tetrasulfide, and/or polysulfide moiety. | 12-11-2008 |
20090026142 | Method of Purifying Liquor - Disclosed herein is a purification method characterized by adding a chitosan powder or a chitosan-coated substance, and optionally further adding a silica sol to liquor and filtering the mixture by a filter machine to remove unsaturated fatty acids, compounds of unsaturated fatty acids with metal ions, or fusel oil from the liquor. | 01-29-2009 |
20090057232 | COMPOSITION AND METHOD FOR REMOVING METAL CONTAMINANTS - A method for removing a metal from a metal-containing solution comprising contacting the metal-containing solution with a metal-removing composition comprising a substrate, an organic ion, and a metal binding agent, and recovering a solution having a lowered metal concentration when compared to the metal-containing solution. A composition comprising a substrate, an organic ion, and a metal binding agent, wherein the substrate comprises a natural clay, a synthetic clay, a natural zeolite, a synthetic zeolite, a polymer resin, lignite, kaolinite, serpentine, illite, chlorite, smectite, montmorillonite, saponite, sepiolite, nontronite, beidellite, hectorite, fuller's earth, attapulgite, bentonite, analcime, chabazite, heulandite, natrolite, phillipsite, stilbite, diethyl aminoethyl, quaternary aminoethyl, or combinations thereof, wherein the organic ion comprises quaternary amines, imidazolium salts, phosphonium salts, tetra alkyl ammonium, bis-(hydrogenated tallow)-dimethyl-ammonium chloride, bis-(hydrogenated tallow)-benzyl-methyl-ammonium chloride, 4,5-dihydro-1-methyl-2-nortallow-alkyl-1-(2-tallow-amidoethyl)-imidazolium methyl sulfate, 1-ethyl-4,5-dihydro-3 -(2-hydroxyethyl)-2-(8-heptadecenyl)-imidazolium ethyl sulfate, or combinations thereof, and wherein the metal-binding agent comprises mercaptan, carboxylic acid, chelating agents, amines, esters, carboxylic acids, alcohols, ethers, aldehydes, ketones, alkenes, alkynes, mercaptans, thiols, tert-dodecanethiol, nonanethiol, octanethiol, n-stearic acid, iso-stearic acid, palmitic acid, or combinations thereof. | 03-05-2009 |
20090057233 | Polyazacrown-based materials for mercury capture and synthesis of those materials - Polyazacrown polymers based on the azacrown monomer 1,4,7,10,13,16,21,24-octaazabicyclo[8.8.8]hexacosane (“H | 03-05-2009 |
20090095684 | Chalcogenide compounds with a clay-like cation-exchange capacity and methods of use - Chalcogenide compounds with cation exchange capability and methods of using the compounds are described. Compounds of the general formula A | 04-16-2009 |
20090184054 | Adsorbent bed for water treatment - An adsorptive bed having hydrous iron oxide and calcium carbonate materials. The adsorptive bed is useful in water treatment applications for removing metal contaminants, particularly for removing arsenic-containing ions. | 07-23-2009 |
20090266767 | Runoff Water Filtration Apparatus and System - A runoff water filter is defined by an elongate, tubular mesh container filled with a filter medium that is selected for the ability of the filter medium to remove target pollutants from the runoff water. In a first disclosed embodiment, vermiculite is used as the primary filter medium for its ability to bind cationic compounds, principally zinc, from water running off metal buildings. Other filter media may also be employed to remove other target pollutants. | 10-29-2009 |
20090294368 | Method and Composition for Sorbing Toxic Substances - Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The sorbent composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxite ores. Exemplary sulfidizing compounds are H | 12-03-2009 |
20100051557 | HEAVY METAL CATIONS ELIMINATION FROM AQUEOUS MEDIA BY NANOTECHNOLOGY - Disclosed is a process, which is used to eliminate heavy metal cations from the aqueous media, and provides a better solution for the existing problems of the separation systems like low efficiency and high costs. The heavy metal cations selected for this purpose are cadmium, lead and copper. The separation system consists of a two stage process: In the first stage, the iron oxide nanoparticles are suspended in an aqueous medium contaminated with the heavy metal cations. In the second stage, the solution is brought into contact with a ferromagnetic matrix (or a paramagnetic matrix) magnetized by the application of an outside magnetic field. The heavy metal cations are deposited on the matrix under the imposed magnetic field. This two-stage process makes it possible to separate the heavy metal cations from the aqueous medium. The wire matrices are upon the completion of separation washed away by water or air current. | 03-04-2010 |
20100059447 | Products and Methods for Removing Substances from Aqueous Solution - The present invention relates to products and methods for removing or recovering substances from aqueous solution. Titanic acid product is used as adsorption material for several substances, for example impurities or contaminants, such as arsenic, lead, fluorine or phosphate. The present invention also relates to a granule for removing substances from aqueous solution and a filter assembly comprising titanic acid or said granule. | 03-11-2010 |
20100116749 | EXTRACTANT COMPOSITIONS FOR CO EXTRACTING CESIUM AND STRONTIUM, A METHOD OF SEPARATING CESIUM AND STRONTIUM FROM AN AQUEOUS FEED, CALIXARENE COMPOUNDS, AND AN ALCOHOL MODIFIER - A mixed extractant solvent that includes at least one dialkyloxycalix[4]arenebenzocrown-6 compound, 4′,4′,(5′)-di-(t-butyldicyclohexano)-18-crown-6, at least one modifier, and, optionally, a diluent. The dialkyloxycalix[4]arenebenzocrown-6 compound is 1,3-alternate-25,27-di(octyloxy)calix[4] arenebenzocrown-6, 1,3-alternate-25,27-di(decyloxy)calix[4]arene-benzocrown-6, 1,3-alternate-25,27-di(dodecyloxy)calix[4]arenebenzocrown-6, 1,3-alternate-25,27-di(2-ethylhexyl-1-oxy)calix[4]arenebenzocrown-6, 1,3-alternate-25,27-di(3,7-dimethyloctyl-1-oxy)calix[4] arenebenzocrown-6, 1,3-alternate-25,27-di(4-butyloctyl-1-oxy)calix[4]arenebenzocrown-6, or combinations thereof. The modifier is a primary alcohol. A method of separating cesium and strontium from an aqueous feed is also disclosed, as are dialkyloxycalix[4]arenebenzocrown-6 compounds and an alcohol modifier. | 05-13-2010 |
20100140179 | POROUS IRON OXIDE AND METHOD FOR PRODUCING THE SAME AND METHOD FOR TREATING SOLUTIONS - To provide a recovery agent for recovering arsenic, fluorine, lead, and selenium from a solution containing environmentally hazardous substances including arsenic and fluorine. A porous iron oxide having a particle size of 10 to 100 μm and a specific surface area of 50 m | 06-10-2010 |
20100147770 | FUNCTIONALIZED CARBON SORBENT AND PROCESS FOR SELECTIVE CAPTURE OF PRESELECTED METALS - A composition and process are described that provide for selective capture of targeted materials, including metals and chemical targets. The composition includes an activated carbon scaffold that is chemically modified to include ligands with a high affinity for selective capture of metals and chemical targets. The invention finds use, e.g., as heavy metal sorbents, as catalyst supports, in analytical applications such as ion chromatography, and in devices such as analytical instruments and chemical sensors. | 06-17-2010 |
20100224567 | Method And Composition For Sorbing Toxic Substances - Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The sorbent composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxite ores. Exemplary sulfidizing compounds are H | 09-09-2010 |
20100230361 | MERCURY REMOVAL - A mercury absorbent comprising a metal sulphide, a support material, a first binder and a second binder, wherein the first binder is a cement binder and the second binder is a high aspect ratio binder having an aspect ratio >2. A mercury removal process comprises contacting a mercury containing feed stream with the absorbent. | 09-16-2010 |
20100252506 | METHOD FOR PRODUCING CHELATE RESINS - The present invention relates to a method of producing novel chelate resins based on crosslinked polymer beads starting with methacrylic compounds, containing aminomethyl groups and/or aminomethyl nitrogen heterocyclic groups as functional groups, that have a high uptake capacity for heavy metals and rapid kinetics. | 10-07-2010 |
20100288704 | Flow-Through Substrate Assemblies and Methods for Making and Using Said Assemblies - Assemblies comprised of mounted flow-through substrates and methods for using and making said assemblies. | 11-18-2010 |
20100307979 | CHELATE RESIN - The present application relates to novel chelate resins which contain, as a functional group, quaternary nitrogen atoms in structures of the general formula (I) | 12-09-2010 |
20100307980 | HIGH CAPACITY ADSORPTION MEDIA FOR SEPARATING OR REMOVING CONSTITUTENTS AND METHODS OF PRODUCING AND USING THE ADSORPTION MEDIA - A method of producing an adsorption medium to remove at least one constituent from a feed stream. The method comprises dissolving and/or suspending at least one metal compound in a solvent to form a metal solution, dissolving polyacrylonitrile into the metal solution to form a PAN-metal solution, and depositing the PAN-metal solution into a quenching bath to produce the adsorption medium. The at least one constituent, such as arsenic, selenium, or antimony, is removed from the feed stream by passing the feed stream through the adsorption medium. An adsorption medium having an increased metal loading and increased capacity for arresting the at least one constituent to be removed is also disclosed. The adsorption medium includes a polyacrylonitrile matrix and at least one metal hydroxide incorporated into the polyacrylonitrile matrix. | 12-09-2010 |
20100320153 | ABSORBENTS - An absorbent composition suitable for removing mercury, arsenic or antimony from fluid streams includes 5-50% by weight of a particulate sulphided copper compound, 30-90% by weight of a particulate support material, and the remainder one or more binders, wherein the metal sulphide content of the absorbent, other than copper sulphide, is below 5% by weight. | 12-23-2010 |
20100326921 | Process for obtaining an adsorbent from a waste material and use of the adsorbent - In the present, a procedure of obtaining adsorbent from a waste material and its use are disclosed. This invention provides a natural waste material, specifically avocado seed, its preparation and use for the filling of columns used in the elimination of contaminants present in wastewater. The particles have an irregular shape and variable size for filling columns of different diameter and length. The adsorbent has the sufficient hardness for avoiding a particle collapse. The material does not rot, is re-generable and ecological. In the present invention the preparation of the adsorbent, its pre-activation, carbonization and application to eliminate the color of textile wastewater is disclosed. | 12-30-2010 |
20110132845 | METHOD FOR EXTRACTING A METAL PARTICULATE FROM AN AQUEOUS SOLUTION USING A SOL-GEL DERIVED SORBENT - Disclosed is a method for extracting metal particulates for an aqueous solution using a sol-gel derived sorbent. | 06-09-2011 |
20110168638 | METHODS OF USING ADSORPTION MEDIA FOR SEPARATING OR REMOVING CONSTITUENTS - Methods of using an adsorption medium to remove at least one constituent from a feed stream. The method comprises contacting an adsorption medium with a feed stream comprising at least one constituent and removing the at least one constituent from the feed stream. The adsorption medium comprises a polyacrylonitrile (PAN) matrix and at least one metal hydroxide homogenously dispersed therein. The adsorption medium may comprise from approximately 15 wt % to approximately 90 wt % of the PAN and from approximately 10 wt % to approximately 85 wt % of the at least one metal hydroxide. The at least one metal hydroxide may be selected from the group consisting of ferric hydroxide, zirconium hydroxide, lanthanum hydroxide, cerium hydroxide, titanium hydroxide, copper hydroxide, antimony hydroxide, and molybdenum hydroxide. | 07-14-2011 |
20110220577 | PROCESS FOR THE REMOVAL OF ARSENIC AND CHROMIUM FROM WATER - The present invention provides low cost and highly effective method for the removal of arsenic and Cr(III&VI) from contaminated water using zinc peroxide nanoparticles (20±5 nm) capped with glycerol/PVP/TEA upto the permissible range of drinking water. As Arsenic and chromium occurs naturally in the earth's crust. When rocks, minerals, and soil erode, they release arsenic and chromium into groundwater. Arsenic and chromium occurs naturally in varying amounts in groundwater in various parts of country from ppb level to ppm level. The average concentration of arsenic and chromium as per USEPA standard in drinking water it is 10 parts per billion and 0.05 ppm (50 ppb) respectively. In drinking water the level of chromium is usually low as well, but contaminated water may contain the dangerous Cr(III&VI). Although Cr(III) is an essential nutrient for humans and shortages may cause heart problems, disruptions of metabolisms and diabetes. But the uptake of too much Cr(III) can cause health effects as well, for instance skin rashes. Cr(VI) is known to cause various health effects Skin rashes, upset stomachs, respiratory problems, weakened immune systems, kidney and liver damage and lung cancer The persons who are drinking water having upto 50 ppb of arsenic and 0.05 ppm chromium over for many years could experience skin damage or problems with their circulatory system, and may have an increased risk of getting cancer. Keeping the above facts we developed a cost effective nanoparticles for the removal of Arsenic and Cr(III&VI) from potable water upto potable range. | 09-15-2011 |
20110220578 | ADSORBENTS - An adsorbent suitable for heavy metal adsorption is described, comprising a thiol functionalised support wherein the adsorbent has a BET surface area in the range 200-500 m | 09-15-2011 |
20110220579 | REMOVAL OF METAL IONS FROM AQUEOUS EFFLUENTS - The invention relates to a method of reducing the ionic metal content of aqueous effluents. The inventive method consists in bringing an aqueous effluent loaded with metal ions into contact with at least one hydrogen-covered metal. | 09-15-2011 |
20110226699 | Nanoporous Silica Polyamine Composites with Surface-Bound Zirconium (IV) and Methods of Use - Silica polyamine composites (SPC) made from silanized amorphous nano-porous silica gel and poly(allylamine) (BP-1) were functionalized with phosphorus acid using the Mannich reaction, resulting in a phosphonic acid modified composite (BPAP). Zirconium (IV) was immobilized on BPAP. Arsenate anions strongly adsorbed on the ZrBPAP composite in the pH range 2 to 8, while arsenite only adsorbed well at pH 10. Regeneration of the resin was carried out successfully for As(V) and As(III) using 2M-H | 09-22-2011 |
20110226700 | REDUCED COPPER SULPHIDE SORBENT FOR REMOVING HEAVY METALS - A sorbent, suitable for removing heavy metals, particularly mercury, from fluid streams containing a reductant such as hydrogen and/or carbon monoxide, is in the form of a shaped unit containing ≦0.1% by weight in total of heavy metal selected from mercury, arsenic, lead, cadmium and antimony, and 4-75% by weight of copper in the form of one or more reduced copper sulphides which have a sulphur to copper atomic ratio of ≦0.6:1. | 09-22-2011 |
20110303612 | METHOD OF MAKING AND USING A COMPOSITE ADSORBENT FROM NATURAL RAW MATERIAL TO REMOVE HEAVY METAL FROM INDUSTRIAL WASTE WATER - An adsorbent composition and method of using the adsorbent composite is described. The method for removing heavy metals from contaminated water is done by mixing contaminated water having a concentration of one or more heavy metals with an adsorbent composite comprising granules of a mixture of 50.363 wt % kaolin clay, a 4.477 wt % roasted date pits powder, a 5.54 wt % silica powder a 14.99 wt % magnesite powder and a 24.623 wt % water. After reacting the contaminated water and adsorbent composite together for a specific time the water is filtered and was found to contain reduced amount of heavy metals. The cleaned water can further be used for industrial cooling systems or watering gardens. | 12-15-2011 |
20110309025 | Methods for using sulfidized red mud - Toxic substances such as heavy metals are extracted from a medium using a sorbent composition. The sorbent composition is derived by sulfidation of red mud, which contains hydrated ferric oxides derived from the Bayer processing of bauxite ores. Exemplary sulfidizing compounds are H | 12-22-2011 |
20120012531 | ADSORBENT FOR ADSORPTION OF HEAVY METALS IN WASTE WATER - A method and adsorbent composition for removing heavy metals from contaminated water, comprising including mixing a water having a concentration of one or more heavy metals with an adsorbent including granules of a mixture of 3.33 wt % bentonite clay and a siwak stick powder; and collecting water having a reduced concentration of the heavy metal(s). | 01-19-2012 |
20120012532 | ARSENIC SORBENT AND METHOD FOR REMEDIATING ARSENIC-CONTAMINATED MATERIAL - An arsenic sorbent includes monohydrocalcite that has been precipitated by mixing an aqueous solution of a soluble carbonate or a carbonate with an aqueous solution that includes an Mg | 01-19-2012 |
20120018384 | MERCURY REMOVAL FROM WATER - The present invention provides a method of removing mercury from water. The method includes depositing selenium or a reactive selenium compound on a support structure, such as reticulated foam. The support structure is then placed in contact with mercury laden water whereby allowing the selenium and the mercury in the water to react. The selenium deposited support structure retains the mercury thereby removing the mercury from the mercury laden water. | 01-26-2012 |
20120103911 | SYNTHESIS OF SODIUM TITANATE - This invention relates to a process for producing a sodium titanate that can be utilized in an ion exchange media. The sodium titanate ion exchange media can be subsequently used to remove contaminants such as metals from water in a variety of applications. The sodium titanate can be synthesized by utilizing a source of titanium that includes a nano-crystalline titanium having a mean primary crystallite diameter of about 1 nm to about 30 nm. | 05-03-2012 |
20120103912 | MIXED VALENCY METAL SULFIDE SORBENTS FOR HEAVY METALS - A sorbent, suitable for removing heavy metals, including mercury, from fluids containing hydrogen and/or carbon monoxide at temperatures up to 550° C., in the form of a shaped unit comprising one or more mixed-valency metal sulphides of vanadium, chromium, manganese, iron, cobalt or nickel. | 05-03-2012 |
20120145640 | METHOD AND COMPOSITION TO REDUCE THE AMOUNTS OF HEAVY METAL IN AQUEOUS SOLUTION - The present invention relates to a method for removing heavy metals from aqueous solutions by contacting heavy metal-contaminated water with a sorption media, or in particular with carbonate minerals. The present invention also relates to methods of using modified sorption media, such as aggregates of carbonate minerals and modified carbonate minerals, for the removal of heavy metals. | 06-14-2012 |
20120160775 | PERMEABLE POROUS COMPOSITE - A porous and permeable composite for treatment of contaminated fluids, said composite including a body of iron particles and 0.01-10% by weight of at least one functional ingredient distributed and locked in the pores and cavities of the iron body. Also, methods of making a permeable porous composite for water treatment. Also, use of a permeable porous composite for reducing the content of contaminants in a fluid, wherein said fluid is allowed to pass through the permeable composite. | 06-28-2012 |
20120168383 | GRAPHENE-IRON OXIDE COMPLEX AND FABRICATION METHOD THEREOF - A graphene-iron oxide complex consists of graphene and needle-like iron oxide nanoparticles grown on a surface of the graphene, and a fabricating method thereof includes (A) preparing a reduced graphene dispersed solution, (B) mixing the dispersed solution with a solution containing iron oxide precursors to prepare a mixture, (C) stirring the mixture to prepare a graphene-iron oxide dispersed solution containing the graphene-iron oxide complex that needle-like iron oxide nanoparticles are grown on the surface of the graphene, and (D) separating the graphene-iron oxide complex from the graphene-iron oxide complex dispersed solution. | 07-05-2012 |
20120175311 | METHOD FOR THE REMOVAL OF ORGANIC CHEMICALS AND ORGANOMETALLIC COMPLEXES FROM PROCESS WATER OR OTHER STREAMS OF A MINERAL PROCESSING PLANT USING A ZEOLITE - The present invention relates to a method of removing organic chemicals and organometallic complexes (organic heavy metal complexes) using zeolites from process water or tailings streams of a mineral processing plant where diethylenetriamine (DETA) or triethylenetetramine (TETA) is used as a flotation reagent and DETA-metal complexes are found in process water or tailings streams. The process water or slurry tailings streams of a mineral processing plant containing DETA, DETA-metal complexes and residual heavy metals may be contacted with natural zeolites. This may be carried out by adding the natural zeolites to the process streams or slurries while mixing with a mechanical mixer to efficiently adsorb DETA, DETA-metal complexes and heavy metals from the process streams on the zeolite. The loaded zeolite may then be discarded with the flotation tailings. | 07-12-2012 |
20120318744 | METAL ADSORBENT AND A METHOD FOR PRODUCING IT, AND A METAL CAPTURING METHOD USING THE METAL ADSORBENT - The present invention is one capable of collecting the metal dissolving in a solution, wherein graft chains of a glycidylalkyl(meth)acrylate represented by the following general formula (1) are formed in the polymer substrate and the graft chain has an amino group or a sulfonic acid group: | 12-20-2012 |
20120325750 | METHOD OF REMOVING METALS FROM A SOLUTION USING LEGUME PLANTS - The present application provides a method for removing a metal from a metal-containing solution, comprising contacting a legume product with the metal-containing solution; and removing the legume product from the solution. | 12-27-2012 |
20130001169 | Metal removal system and method - A metal removal system and method are disclosed. An example method includes providing a sorptive media and providing a primary ligand having an affinity for the sorptive media, the primary ligand being an amphipathic, heterocyclic metal-coordinating compound. The method also includes providing a co-ligand having an affinity for the sorptive media. During a treatment process, a metal removal response is observed to be non-proportional between expected metal removal ability based on individual metal coordination abilities of the media alone and of all ligands, and actual net metal removal capacity resulting from a heterogeneous cooperation of the primary ligand and the sorptive media and activated by the co-ligand. | 01-03-2013 |
20130037488 | ADSORBENT FOR ADSORPTION OF HEAVY METALS IN WASTE WATER - A method and adsorbent composition for removing heavy metals from contaminated water, including mixing a water having a concentration of one or more heavy metals with an adsorbent including granules of a mixture of 3.33 wt % bentonite clay and a siwak stick powder; and collecting water having a reduced concentration of the heavy metal(s). | 02-14-2013 |
20130105400 | COMPOSITE CONTAINING METAL COMPONENT SUPPORTED ON GRAPHENE, PREPARING METHOD OF THE SAME, AND USES OF THE SAME | 05-02-2013 |
20130168322 | AMIDOXIME-MODIFIED POLYACRYLONITRILE POROUS BODY - An amidoxime-modified PAN porous body obtained by reacting with hydroxylamine a polyacrylonitrile porous body that is monolithic, has a thickness of 1 mm or more and contains polyacrylonitrile (PAN) as the main component to convert a nitrile group of the polyacrylonitrile porous body into an amidoxime group. This porous body is a porous body for adsorbing a metal ion, for example, an ion of metal such as copper, iron, nickel, vanadium, indium, gallium, silver, mercury, lead, uranium, plutonium, cesium, barium, lanthanum, thallium and strontium. | 07-04-2013 |
20130180925 | METHOD FOR THE SYNTHESIS OF TETRAVALENT MANGANESE FEROXYHITE FOR ARSENIC REMOVAL FROM WATER - The present invention refers to a method for the synthesis of an adsorbing material consisting of a single-phase tetravalent manganese feroxyhite (ō-Fe | 07-18-2013 |
20130228522 | ARSENIC REMOVAL SYSTEM - A system is provided for removing arsenic from water to safe levels at or below the EPA standards. The system is a hybrid spouted vessel/fixed bed filter system that significantly enhances/improves arsenic removal for drinking water using zero-valent iron (ZVI) particles. Movement of the circulating, iron-containing particles in a dense moving bed that forms on the spouted vessel bottom creates an abrasive “self-polishing” action among them that continuously generates colloidal iron corrosion products. This material then circulates with the water in the vessel and is removed and concentrated in a fixed bed filter. The colloidal material captured and immobilized in the filter has been shown to remove arsenic from contaminated water at very rapid rates. | 09-05-2013 |
20130240453 | Media for Removal of Contaminants from Fluid Streams and Method of Making and Using Same - Sorption media for removal of contaminants from fluid streams are provided. The sorption media comprise an active compound bound or linked to a support substrate or matrix. Support substrates can include iron- and alumina-based materials. A method for making sorption media for the removal of contaminants from fluid streams is also described. The method includes selecting a support substrate, and, optionally, providing a doping mixture comprising an active compound. The selected support substrate can be contacted with the doping mixture to form a doped mixture. The doped mixture can be reacted at a predetermined temperature and atmospheric environment for a predetermined duration to form an active media, wherein the active compound is bound or linked to the support substrate. | 09-19-2013 |
20130292338 | IRON COORDINATION POLYMERS FOR ADSORPTION OF ARSENATE AND PHOSPHATE - A method includes combining an aqueous solution of sodium fumarate with an aqueous solution of iron chloride to form a mixture, and obtaining an iron coordination polymer as an amorphous compound formed as a precipitate from the mixture. The iron coordination polymer may be used to bind contaminants, such as arsenate and phosphate from water. | 11-07-2013 |
20140069873 | Acidic Mine Water Remediation - A process for treating acidic mine drainage water to remove heavy metal ions is described in which acidic mine drainage water is contacted with direct process residue gel. | 03-13-2014 |
20140097141 | SYNTHESIS OF LAYERED METAL SULFIDE ION-EXCHANGERS - Methods for the synthesis of compounds of the formula A | 04-10-2014 |
20140138322 | HEAVY METAL REMOVAL FROM WASTE STREAMS - A method for removing heavy metals from contaminated water, comprising collecting metal salt precipitates from a water softening process, drying said precipitates, contacting water having a concentration of one or more heavy metals with said precipitates, and collecting water having a reduced concentration of said heavy metal(s). | 05-22-2014 |
20140190893 | AMPHOLYTIC POLYMERIC SYSTEM - The present invention relates to an ampholytic polymeric system obtainable by a process comprising the copolymerisation of (i) a monomer according to Formula (1), (ii) an ethylenically unsaturated cationic monomer and (iii) a (co)polymer comprising an ethylenically unsaturated anionic monomer which comprises a sulfonate group: (1) wherein X is O or NR | 07-10-2014 |
20140284281 | NOVEL ADSORBENT COMPOSITE FROM NATURAL RAW MATERIALS TO REMOVE HEAVY METALS FROM WATER - An adsorbent composition for removing heavy metals from contaminated water is described. The composition comprises of a mixture of kaolin clay, cellulose powder, silica powder, magnesite powder, bentonite powder and water. The adsorbent is mixed with contaminated water and allowed to react. Once the reaction is finished a reduced contaminant containing water is gathered and reused. | 09-25-2014 |
20140311986 | USE OF ZEOLITIC MATERIALS FOR REMOVING MERCURY (+2) IONS FROM LIQUID STREAMS - A process for removing Hg | 10-23-2014 |
20140374358 | MANGANESE OXIDE-BASED AND METALLOMANGANESE OXIDE-BASED ION-EXCHANGERS FOR REMOVING MERCURY (+2) IONS FROM LIQUID STREAMS - A process for removing Hg | 12-25-2014 |
20150014253 | REMOVAL OF HEAVY METALS FROM AQUEOUS SOLUTIONS USING METAL-DOPED TITANIUM DIOXIDE NANOPARTICLES - The removal of heavy metals from aqueous solutions using metal-doped titanium dioxide nanoparticles is a method that comprises contacting the aqueous solution with metal-doped titanium dioxide nanoparticles. The three transition metals tungsten, vanadium and iron were selected for doping of titanium dioxide. Removal of the toxic heavy metals Pb(II), Zn(II) and Cd(II) was studied intensively by using metal-doped titanium dioxide to measure the isotherms and kinetics. The isotherms studies showed that the highest removal percentage of Pb(II) was achieved by W-doped titanium dioxide, while Fe-doped titanium dioxide and V-doped titanium dioxide performed better for removal of Zn(II) and Cd(II), respectively. | 01-15-2015 |
20150034561 | PERFORMANCE TRAPPING MASS AND USE THEREOF IN HEAVY METAL TRAPPING - The present invention concerns the elimination of heavy metals, in particular mercury and possibly arsenic and lead, present in a gaseous or liquid effluent by means of a capture mass comprising a support essentially based on alumina obtained by the gel method and at least one element selected from the group constituted by copper, molybdenum, tungsten, iron, nickel and cobalt. The invention is advantageously applicable to the treatment of gas of industrial origin, synthesis gas, natural gas, gas phase condensates and liquid hydrocarbon feeds. | 02-05-2015 |
20150108070 | METHOD FOR PREPARING CROSS-LINKED HYPERBRANCHED POLYAMIDOAMINE PARTICLES USING REVERSE PHASE SUSPENSION POLYMERIZATION AND PRECURSOR - Disclosed herein is a method of preparing hyperbranched polyamidoamine particles, including: a) preparing a polyamidoamine precursor mixture from a multifunctional amine monomer and a multifunctional acrylamide monomer; and b) polymerizing the polyamidoamine precursor mixture into cross-linked hyperbranched polyamidoamine particles using reverse phase suspension polymerization. Also, hyperbranched polyamidoamine particles prepared by the method are provided, which can remove heavy metals in an aqueous solution without the need for an ultrafiltration apparatus. | 04-23-2015 |
20150306567 | CHITOSAN-FUNCTIONALIZED CORDIERITE MONOLITHS AS HEAVY METAL SORBENTS - Embodiments of a method of making a sorbent comprise providing a monolith having a plurality of internal channels, providing at least one silica coating onto walls of the plurality of internal channels by applying a silica coating solution, and providing at least one chitosan coating on the silica coating by applying a chitosan coating solution. | 10-29-2015 |
20160002067 | IMMOBILIZED LIGANDS FOR THE REMOVAL OF METAL IONS AND METHODS THEREOF - Disclosed are immobilized dimercapto succinate compounds (immobilized dithiol compounds), a method to synthesize these immobilized dithiol compounds, and a method of using the immobilized dithiol compounds to remove metals, such as lead, cadmium and mercury from an aqueous solution. Also disclosed are immobilized mono- and di-citrate compounds (immobilized citrate compounds), a method to synthesize these solid-supported compounds, and a method of using the immobilized citrate compounds to remove trivalent metals, such as iron and aluminum from an aqueous solution. | 01-07-2016 |
20160002069 | THERMALLY TREATED EXPANDED PERLITE - A thermally treated expanded perlite that can be coated or impregnated with at least one active material and the use of the thermally treated expanded perlite as a light-weight filtration media. Methods for forming thermally treated expanded perlite as well as methods for forming thermally treated perlite coated or impregnated with an active material are also disclosed. | 01-07-2016 |
20160016821 | NOVEL CROSS-LINKED (BISPHENOL-S, FORMALDEHYDE, 1,6-HEXADIAMINE) TERPOLYMER FOR THE ADSORPTION OF Pb2+ IONS FROM AQUEOUS SOLUTIONS - A cross-linked terpolymer (BSDF) obtained by polycondensation of bisphenol-S, formaldehyde and 1,6-diaminohexane. The terpolymer is highly efficient in eliminating lead ions from aqueous solutions. The adsorption of lead ions on BSDF was studied under different conditions such as: pH, contact time and temperature. The adsorption kinetics fits Lagergren second order kinetic model that are in agreement with the low surface area as a chemisorption process. Applying BSDF on non-spiked and spiked real wastewater samples under optimum conditions revealed the high efficiency of BSDF in removing toxic metal ions. | 01-21-2016 |
20160023202 | DEVELOPMENT OF A HIGH-EFFICIENCY ADSORBENT FROM E-WASTE AND ALUMINOSILICATE-BASED MATERIALS FOR THE REMOVAL OF TOXIC HEAVY METAL IONS FROM WASTEWATER - An impregnated and activated ion exchange material prepared by a process is provided that includes: impregnating an ion exchange precursor material, wherein impregnation of the ion exchange precursor material includes reacting the ion exchange precursor material with an impregnator solution, thereby increasing the surface area and the hydrophilicity of the ion exchange precursor material; activating the impregnated ion exchange precursor material to increase the porosity of the impregnated ion exchange precursor material, wherein the ion exchange precursor material comprises at least one of nonmetallic printed (NMP) circuit board, amorphous aluminosilicate, or mixtures thereof. In other aspects, a method for fabricating an ion exchanger and a method for removing heavy metal ions from a solution are provided. | 01-28-2016 |
20160023922 | FILTER AND METHODS FOR HEAVY METAL REMEDIATION OF WATER - A liquid filter article, including:
| 01-28-2016 |
20160046815 | Surface-Independent, Surface-Modifying, Multifunctional Coatings and Applications Thereof - The present invention provides a surface-independent surface-modifying multifunctional biocoating and methods of application thereof. The method comprises contacting at least a portion of a substrate with an alkaline solution comprising a surface-modifying agent (SMA) such as dopamine so as to modify the substrate surface to include at least one reactive moiety. In another version of the invention, a secondary reactive moiety is applied to the SMA-treated substrate to yield a surface-modified substrate having a specific functionality. | 02-18-2016 |
20160052800 | A FILTER MATERIAL HAVING A FUNCTION OF ADSORBING AND FIXING ARSENIC AND HEAVY METALS - A filter material having a function of adsorbing and fixing arsenic and heavy metals and usage thereof. The filter material includes a porous ceramic substrate with porosity of 35%-85%, and zero-valent iron nanoparticles formed in situ within the porous ceramic substrate. The porous ceramic substrate has micropores of 2-10 micron, and fluffy amorphous silicon-iron-carbon structure is formed within each micropore. At least 25 wt % of ceramic component constituting the porous ceramic substrate is diatomaceous earth, and the fluffy amorphous silicon-iron-carbon structure within the micropore can form an adsorption film after water absorption. In the microstructure, the filter material obtained is configured as a porous and fluffy nose-like filter structure and generates an adsorption film, thereby greatly improving adsorption efficiency and adapting to changes in water quality and chemical environment. The used filter material will not fall off and no heavy metal will be separated therefrom, thereby ensuring the security of use. | 02-25-2016 |
20160151775 | ION EXCHANGE PRODUCT AND MANNER OF USE | 06-02-2016 |
20160152563 | SOLID SUPPORTED TRITHIOL COMPOUNDS FOR REMOVING HEAVY METALS FROM SOLUTION, AND FILTRATION SYSTEMS UTILIZING THE COMPOUNDS | 06-02-2016 |
20160175812 | PRISTINE AND SURFACE FUNCTIONALIZED CELLULOSE NANOCRYSTALS (CNCs) INCORPORATED HYDROGEL BEADS AND USES THEREOF | 06-23-2016 |
20160175814 | ACTIVATED CARBON/ALUMINUM OXIDE/POLYETHYLENIMINE COMPOSITES AND METHODS THEREOF | 06-23-2016 |
20180022840 | QUATERNARY AMMONIUM SOLVATED TETRAPOLYMERS AND METHODS OF REMOVING CR(III) FROM SOLUTION USING THE TETRAPOLYMER | 01-25-2018 |