Abstract: A filtering device is for obtaining a chemical liquid by purifying a liquid to be purified, and has an inlet portion, an outlet portion, a filter A, at least one filter B different from the filter A, and a flow path which includes the filter A and the filter B arranged in series between the inlet portion and the outlet portion and extends from the inlet portion to the outlet portion, in which the filter A includes at least one kind of porous membrane selected from the group consisting of a first porous membrane having a porous base material made of polytetrafluoroethylene and a non-crosslinked coating which is formed to cover the porous base material and contains a perfluorosulfonic acid polymer and a second porous membrane containing polytetrafluoroethylene blended with a perfluorosulfonic acid polymer.

Abstract: A filtering device is for obtaining a chemical liquid by purifying a liquid to be purified, and has an inlet portion, an outlet portion, a filter A, at least one filter B different from the filter A, and a flow path which includes the filter A and the filter B arranged in series between the inlet portion and the outlet portion and extends from the inlet portion to the outlet portion, in which the filter A includes at least one kind of porous membrane selected from the group consisting of a first porous membrane having a porous base material made of polytetrafluoroethylene and a non-crosslinked coating which is formed to cover the porous base material and contains a perfluorosulfonic acid polymer and a second porous membrane containing polytetrafluoroethylene blended with a perfluorosulfonic acid polymer.

Abstract: A method of forming one or more composite structures is provided wherein one or more carbon structures is formed from a carbon source via a hydrothermal process. Said carbon source is a biomass material including glucose and glucosamine hydrochloride. In particular, the method further comprises introducing a seeding additive of potassium or phosphate salt, preferably monopotassium phosphate to the carbon source. The method includes introducing iron onto the carbon structures to form the one or more composite structures including carbon and iron.

Abstract: Provided is a system and method for extracting organic solutes from water with a filter media. The system and method allow for regenerating the filter media following treatment of a water supply containing one or more organic solutes to allow the media to be reused for subsequent water treatment operations. The system and method also allows for regeneration of the displacement fluid for reuse in the regeneration of the media with recovery of at least one or more organic solutes from the displacement fluid. Additionally, the system and method allows for substantially continuous treatment of a water supply and regeneration of a filter media.

Abstract: Disclosed are methods to remove organic and/or inorganic compounds (e.g., contaminants) from water containing organic and/or inorganic compounds, involving contacting the water with an effective organic and/or inorganic compounds removing amount of hemoglobin/Fe3O4 composite where the compounds in the water adsorb onto the hemoglobin/Fe3O4 composite, and removing (e.g., using a magnet since the composite is magnetic) the hemoglobin/Fe3O4 composite from the water.

Abstract: Disclosed is a system in which saturated mercury adsorbent in a gas mercury removal unit is dehydrated in a LNG, LPG or cryogenic gas plant using a regeneration gas stream. Spent regeneration gas stream is then condensed and the water is removed therefrom to form a renewed regeneration gas stream in a closed loop. The regeneration gas stream is compressed and recycled to a location in the plant upstream of an acid gas removal unit or upstream of a regeneration gas dehydration unit such that the regeneration gas stream is not sent to a flare. A dehydration unit having a pair of dehydration vessels, arranged in parallel, alternating between absorption and regeneration modes, receives gas from the compressor. Conventional plants can be retrofitted to achieve improved process efficiencies, cost savings and environmental benefits.

Abstract: Cross-linked polymeric resins from anilines linked together with polyamine alkyl chains. A process for producing the cross-linked polymeric resins by Mannich-type polycondensation of anilines and diaminoalkanes linked together by an aldehyde and subsequent basification. In addition, a method for removing heavy metals, such as Pb (II) and As (V) from aqueous solution via contacting and treatment with the cross-linked polymeric resins.

Abstract: Saturated mercury adsorbent in a gas mercury removal unit is dehydrated in a LNG, LPG or cryogenic gas plant using a regeneration gas stream. Spent regeneration gas stream is then condensed and the water is removed therefrom to form a renewed regeneration gas stream in a closed loop. The regeneration gas stream is compressed and recycled to a location in the plant upstream of an acid gas removal unit or upstream of a regeneration gas dehydration unit such that the regeneration gas stream is not sent to a flare. Conventional plants can be retrofitted to achieve improved process efficiencies, cost savings and environmental benefits.

Abstract: A material for moisture removal and/or water harvesting from air may include a hydrophilic material containing micropores and a low water activity material confined within the micropores of the hydrophilic material. Apparatuses containing such materials and methods for moisture removal and/or water harvesting from air by using such materials are also described.

Abstract: A process for the amelioration of acid mine drainage useful in shale hydrolyic fracturing operations for the production of natural gas involving the exchange of sulfate and chloride ions by an ion exchange resin so as to produce hydrochloric acid and water for use in hydrolyic fracturing operations from acid mine drainage.

Abstract: The present disclosure is directed to a high temperature method to adsorb carbon dioxide onto an ion-exchange resin and/or regenerate the carbon dioxide-loaded ion-exchange resins.

Abstract: Disclosed herein is a process for producing phenol. The process includes oxidizing at least a portion of a feed comprising cyclohexylbenzene to produce an oxidation composition comprising cyclohexyl-1-phenyl-1-hydroperoxide. The oxidation composition may then be cleaved in the presence of an acid catalyst to produce a cleavage reaction mixture comprising the acid catalyst, phenol and cyclohexanone. At least a portion of the cleavage reaction mixture may be neutralized with a basic material to form a treated cleavage reaction mixture. In various embodiments, the treated cleavage reaction mixture contains no greater than 50 wppm of the acid catalyst or no greater than 50 wppm of the basic material.

Abstract: The invention relates to removing contaminants from oil using solid sorbents that are comprised primarily of carbon and preferably of coke particles. The coke particles have an affinity for contaminants in oil and are sized to be filtered from oil without plugging. Most contaminants have such a small size that they tend to plug up filters. As the contaminants agglomerate onto the solid sorbent, the resulting particles form a filter cake on conventional filter materials in such a way as to allow the oil to pass on through without significant pressure drop or delay.

Abstract: The invention relates to removing contaminants from oil using solid sorbents that are comprised primarily of carbon and preferably of coke particles. The coke particles have an affinity for contaminants in oil and are sized to be filtered from oil without plugging. Most contaminants have such a small size that they tend to plug up filters. As the contaminants agglomerate onto the solid sorbent, the resulting particles form a filter cake on conventional filter materials in such a way as to allow the oil to pass on through without significant pressure drop or delay.

Abstract: A method of recovering palatable potable storable water from a process for concentrating an extracted juice, the method including the steps of: providing the extracted juice; concentrating the extracted juice to form a concentrated juice stream and a concentrator waste stream, wherein the concentrator waste stream is not palatable, potable or storable; and purifying the concentrator waste stream to provide palatable potable storable water including the step of passing the concentrator waste stream through activated carbon.

Abstract: This invention relates to a method of manufacturing an organic-inorganic composite hybrid adsorbent by impregnating activated carbon nanopores with an oxide and a water treatment method using the same, and particularly, to an adsorbent including a porous adsorbent and ferrihydrite, goethite, hematite or magnetite incorporated into the porous adsorbent, and a manufacturing method thereof.

Abstract: A water treatment system (100) incorporating a solubles concentration reduction device (104) between a powdered activated carbon treatment (PACT) system (106) and a wet air regeneration (WAR) system (108). Soluble components may be removed by sequentially dewatering (20) then re-slurrying (28) spent carbon sludge (18). The reduced concentration of soluble materials reduces the need for scale removal maintenance and eliminates the necessity for exotic materials of construction of the WAR system components. The solubles concentration reduction device also facilitates active control of the solids concentration being delivered to the WAR system.

Abstract: An improved process for regenerating ion exchange resin, includes a regeneration step of displacing captured ions from the resin to regenerate its ion-capture functionality, followed by one or more fluid-employing post-regeneration steps such as a fluid displacement or rinse, a fluid transporting or mixing, and a rinse down to quality. To avoid problems of early leakage of weakly held ions such as boron, the post-chemical or postdisplacement steps use water that is essentially free of boron, or otherwise avoid localized contamination in the regenerated resin which is used in bottles or beds (30). A two-stage polish may be operated with modified lead/lag bottles. A detector (D) for an indicator condition (conductivity, silica breakthrough) between stages determines when to shift the lag bottle forward, and periodically both bottles are replaced.

Abstract: A method of removing chromium from water using a weak base anion exchange resin at a pH above about 5 includes the step of periodically reducing a flow of the water through the ion exchange resin for a rest period, such that a secondary mechanism of chromium removal predominates, wherein chromium ions are removed from the weak base anion exchange groups and precipitated inside the ion exchange resin. In an alternative embodiment, rather than resting, the ion exchange resin is periodically conditioned with an acid so as to enhance the secondary mechanism.

Abstract: A system is provided for removal of undesirable dissolved substances from solutions containing two or more dissolved substances to produce one or more new solutions suitable for beneficial use. The system utilizes amphoteric media in a treatment cycle where dissolved substances from the concentrated solution are first adsorbed by the media and subsequently rinsed with water to desorb and collect the dissolved substances sequentially into dilute effluent streams the substances are either aggregated or segregated based upon differences in relative concentrations of dissolved substances that is a result of differences in the affinity of the media for the dissolved substances. One or more of the dilute effluent streams are treated with a desalination process to recover water for media rinse and to concentrate the separated dissolved substances to facilitate beneficial use or disposal.

Abstract: A method for fluid treatment that provides variable or alternative regeneration cycles within the same fluid treatment device. The duration of all stages of the regeneration cycle can be adjusted depending upon the amount of fluid treated so that regenerant resources such as water are not underutilized and waste is not discharged unnecessarily into the environment. Additionally or alternatively, a regeneration sequence may include a fluid release sequence in which a fluid is released from a water treatment tank by successive linear movement of a piston in a valve assembly.

Abstract: A process for reducing the concentration of perchlorate in an aqueous concentrated multi-component salt solution comprising treating the salt solution with an amphoteric ion-exchange resin to provide an adsorbed perchlorate and multi anion-containing resin and a perchlorate depleted solution; and removing the perchlorate depleted solution. The multi-anion are selected from chloride, chlorate, perchlorate, sulphate, and dichromate, present in electrolytic processes for the production of sodium chlorate.

Abstract: The invention relates to a method for removing ammonium nitrogen from organic waste water, which method comprises the steps of applying waste water with a content of ammonium to an organic, synthetic ion exchanger, allowing ammonium to adsorb to the ion exchanger, and regenerating the ion exchanger with regenerant solutions of very high molality.

Abstract: A method and apparatus for treating water including a tank having an inlet and outlet and a water treatment material or resin within the tank. A control valve assembly having multiple, separable levels houses a water usage metering mechanism and a regeneration control mechanism, each having associated turbines. An inlet/bypass valve communicates source water with the tank inlet or directly to a system outlet. When the treatment material is exhausted, it is regenerated by actuating the bypass valve to communicate the source water with the system outlet. The turbine driven regeneration control then sequences the steps of regeneration, including opening a control valve to communicate inlet water to a venturi in order to aspirate brine solution and deliver to the tank outlet. The brine solution passes through the treatment material and is discharged through the tank inlet which is communicated to a system drain.

Abstract: The present invention concerns a nano-structured composite material based on compositions of manganese and cerium, composed of aggregated composite nanospheres, ranging in size from 1 to 40 nm, of ultrafine crystalline nanoparticles of one or more compounds of cerium, dispersed in a metastable solid mixture of one or more sub-stoichiometric oxides of manganese, said sub-stoichiometric oxides of manganese comprising MeMnOz manganates, wherein 1?z?4, Me being constituted of one or more elements selected amongst alkali metals, alkaline earth metals, transition metals and rare earths, and in particular being constituted of one or more elements selected amongst Ce, V, Ti, Cr, Fe, Cu, Zn, Sn, Ga, Gd, Y, Zr, Al, Si, La, K, Li, Pb, Cs, or mixtures thereof; which can be used in the industry as redox catalyst and/or adsorbing filter of heavy metals, cyanides, sulfur compounds, pigments, dyes, polymers (PEG), phenols, alcohols, aldehydes and ketones, ethers, esters and carboxylic acids which are present both in contamin

Abstract: Compositions and methods for removing surface deposits in situ from filtration media contained in water filtration beds may include a solid acid component, a solid oxidizer, low temperature activator, a dessicant, an anti-caking agent, a pH indicator, a corrosion inhibitor, a surfactant, a chelating agent, and/or a defoaming agent. A granular acid component may include sodium bisulfate, and a granular oxidizing component may include at least one of sodium percarbonate, sodium perborate, potassium percarbonate, and potassium perborate. Compositions may be applied to top surface and/or subsurface regions of a filter bed, in wetted or dry form. A kit includes a container with dry composition and instructions or indicia for cleaning water filtration media using the composition.

Abstract: A system and process for removing hydrocarbons from a gas process feed stream is presented. The treatment process may be, but is not limited to, glycol dehydration, amine sweetening, and MEG reclamation. As an example, a hydrocarbon removal bed containing a solid adsorbent material adsorbs the hydrocarbons in a rich MEG feed stream as it passes through the hydrocarbon removal bed. After the hydrocarbons have been removed, the feed stream flows through a flash separator and a distillation column to reclaim MEG. Alternatively, the hydrocarbon removal bed may be used after the MEG reclamation process to remove hydrocarbons in the distilled water from the distillation column. Spent solid adsorbent material may be regenerated in place.

Abstract: The present disclosure is directed towards systems and methods for the treatment of wastewater. A system in accordance with one particular embodiment may include a front end system including at least one resin tank configured to contain an ion exchange resin configured to target a particular metal. The at least one resin tank may be configured to receive an output from an oxidation reactor configured to receive a flow of wastewater from a wastewater producing process. The system may further include a central processing system configured to receive a saturated resin tank from the at least one resin tank. The central processing system may further include a vacuum filter band system configured to receive a slurry from the saturated resin tank and to provide a cascading resin rinse to the slurry. The central processing system may further include a repetitive stripping system configured to receive a metal-filled purification unit from a metal specific purification system.

Abstract: Disclosed is a method for removing carbon dioxide from a gas stream, comprising placing the gas stream in contact with a resin, wetting the resin with water, collecting water vapor and carbon dioxide from the resin, and separating the carbon dioxide from the water vapor. The resin may be placed in a chamber or a plurality of chambers connected in series wherein the first chamber contains resin that was first contacted by the gas, and each successive chamber contains resin which has been wetted and carbon dioxide collected from for a greater period of time than the previous chamber, and so on, until the last chamber. Secondary sorbents may be employed to further separate the carbon dioxide from the water vapor.

Abstract: A water treatment system (100) incorporating a solubles concentration reduction device (104) between a powdered activated carbon treatment (PACT) system (106) and a wet air regeneration (WAR) system (108). Soluble components may be removed by sequentially dewatering (20) then re-slurrying (28) spent carbon sludge (18). The reduced concentration of soluble materials reduces the need for scale removal maintenance and eliminates the necessity for exotic materials of construction of the WAR system components. The solubles concentration reduction device also facilitates active control of the solids concentration being delivered to the WAR system.

Abstract: The present invention is a wastewater treatment method using dried BOF slag and hydrogen peroxide, wherein hydrogen peroxide is oxidized to generate hydroxyl radicals that reacts with soluble metal contaminants in the sludge such that these contaminants can be adsorb on the catalyst particles and/or eliminated from the wastewater stream by separation techniques. The process can use catalytic oxidation for soluble metals removal. In addition, catalytic oxidation can produce a filtered water saturated with Oxygen and higher in pH resulting in enhanced precipitation of soluble metals when softening agents, such as Sodium Carbonate, are added in a subsequent processing step. Another embodiment of the present invention is a method using ferrous sulfate for removing soluble metals in wastewater, followed by Catalytic Oxidation to remove soluble Fe without addition of metal salts, and removing sulfates by adding Barium Carbonate.

Abstract: Systems, methods, and devices for preparation of water for various uses including blood treatment are described. In embodiments, fluid is passed either by pump or passively by gravity feed, through various filtration elements from a fluid source to a treatment fluid container. The latter forms a batch that may be used during treatment. The advantage of forming the batch before treatment is that the rate of filtering needn't match the rate of consumption during treatment which provides multiple benefits and liabilities to overcome, as discussed herein. Mechanisms for preparing pure water for infusion or medicaments are described such as elimination of chlorine and colloidal aluminum. Also various control mechanisms to help avoid contamination are describe.

Abstract: A bio-inspired method for detoxifying contaminated water is disclosed. In the method, polydopamine, a mussel-inspired adhesive catecholamine was used as an adsorbent to effectively remove from contaminated water three major classes of toxic agents: heavy metal ions (e.g., Cr, Hg, Pb, Cu, and Cd), toxic organic species (e.g., 4-aminopyridine), and radioisotopes (e.g., Lutetium-177). Furthermore, the polydopamine adsorbent was regenerated by treatment with acid or hydrogen peroxide.

Abstract: A water treatment system (50) utilizing granular activated carbon (GAC) for the removal of organic contaminants in a process water circuit (52), and including a carbon regeneration circuit (54) in fluid communication with the process water circuit. The carbon regeneration circuit may include a dedicated regeneration vessel (16), or the regeneration process may proceed within a GAC/water contactor (58) of the process water circuit. A process is described wherein spent GAC from the water treatment system is regenerated within the system with an oxidation process that minimizes damage to the carbon granules.

Abstract: Disclosed is a method for recovering a corrosion preventive agent in an electrodischarge machining liquid supply apparatus. The method includes the step of passing a first electrodischarge machining liquid having a corrosion preventive agent added there to through, an ion exchange resin column to maintain a suitable specific resistance of the first liquid, and the step of passing a second liquid free from a corrosion preventive agent through the ion exchange resin column to desorb the corrosion preventive agent adsorbed in the ion exchange resin column. The second liquid is, for example, tap water or a machining liquid having a low corrosion preventive agent concentration. The corrosion preventive agent is, for example, adenine which is a purine base.

Abstract: The present invention is related to a method to obtain reactive [18F] fluorides in an organic medium suitable for radiolabelling without any azeotropic evaporation step, by the use of a solid phase extraction column containing a modified non-ionic solid support.

Abstract: A system and method for the treatment of wastewater. In one aspect, the invention can be a method for treating wastewater comprising: a) introducing untreated wastewater into a holding tank: b) flowing the untreated wastewater into a first wastewater treatment trailer to provide a first treatment regimen to the untreated wastewater to form a first treated wastewater c) flowing the first treated wastewater into a second wastewater treatment trailer to provide a second treatment regimen to the first treated wastewater to form a second treated wastewater; and wherein the holding tank, the first wastewater treatment trailer and the second wastewater treatment trailer are fluidly coupled together to facilitate flow of the untreated wastewater from the holding tank into the first wastewater treatment trailer and flow of the first treated wastewater from the first Wastewater treatment trailer into the second wastewater treatment trailer.

Abstract: A portable system for extracting iodine from brine on-site is disclosed. The portable system includes a mobile platform containing a treatment unit for oxidizing iodine ions into elemental iodine, an adsorption unit capable of binding iodine, and may also have an electrolytic cell and/or a gas-liquid separator. The treatment unit and the adsorption unit may be located in the same or different portable operating devices. When transported to a field site containing natural gas wells, the natural gas wells provide a fluid stream containing natural gas and brine. The separators can separate the natural gas from the brine, and the brine is then run through the treatment unit and the adsorption unit to bind iodine present in the brine. The brine is then returned to the natural gas well. Upon saturation, the portable operating device is transported to a second location, where iodine is extracted from the adsorption unit.

Abstract: Disclosed is a water-insoluble polymeric iron chelating agent having a polymer backbone and an aromatic ring attached to the polymer backbone through an —NH—CH2— bond, wherein the aromatic ring has one or two first functional groups in the form of hydroxyl group and one or two second functional groups located at the ortho position with respect to the first functional group; and wherein the second functional group is —OH, —COOH, or a group represented by formula (I) wherein A represents —CH3, —CH2—CH3, —CH2—C6H5, —CH2—C5H4N or —CH2—COOH and B represents —CH2—COOH. The water-insoluble polymeric iron chelating agent of the present invention offers the advantages of being capable of selectively chelating iron ions, particularly biologically unstable iron, and being insoluble in water, and moreover not being incorporated in metabolic processes in vivo.

Abstract: Disclosed is a method of treating a treatment object containing a harmful compound. The method includes: a step A of bringing a treatment object containing a harmful compound containing an element X that is As, Sb or Se into contact with titanium oxide so as to adsorb the harmful compound on the surface of the titanium oxide; a step B of separating, from the treatment object, the titanium oxide on which the harmful compound is adsorbed; and a step C of irradiating the titanium oxide separated from the treatment object with light in a treatment phase containing a radical source so as to cause a reaction between the harmful compound adsorbed on the titanium oxide and a radical generated from the radical source and detoxify the harmful compound.

Abstract: The present invention relates to the use of a carbonaceous adsorbent for the removal of a recalcitrant compound (1,4-dioxane) from contaminated water. The adsorbent is able to reduce the concentration of 1,4-dioxane from thousands of ?g/L to <3 ?g/L (the current EPA guideline). In addition, the adsorbent is regenerable in place with low pressure steam.

Abstract: A flexible process for the preparation and conditioning of sedimentary materials. The degree of decontamination of these dredged materials is enhanced by the use of chemical indicators. Based upon the level of contamination contained within this material the process is used to isolate the specific contamination and utilize a variable process to decontaminate these compounds. Not all of the compounds contained within the dredged sediment is treated the same way. The process is designed to isolate the composite of materials and treat each particle with a different process based upon its classification. Post treatment, this material may be combined and dewatered for a suitable use.

Abstract: A method for conditioning a contaminated ion exchange resin includes mixing the contaminated ion exchange resin with water and at least partly breaking up the contaminated ion exchange resin into water-soluble components or fragments through the use of an oxidizing agent added to the water. A resulting aqueous solution is consolidated with a binder, optionally after concentration by evaporation of water.

Abstract: The invention comprises water desalination methods and a system for such, which includes treatment of water in cation and anion ion exchange columns, and regenerating the columns after treatment of the water to set them up again for a further treatment cycle, and also providing recoverable by-products during the regeneration of the ion exchange columns instead of waste.

Abstract: An on-demand portable chlorine dioxide generator has a reagent bound medium in a first enclosed volume; a complementary reagent solution in a second enclosed volume, and a structure for selecting between a first position where the complementary reagent solution is forced through the reagent bound medium and a second position where said complementary reagent solution remains isolated from the reagent bound ion exchange medium, where a ClO2 solution is generated only during periods when the structure for forcing is actuated. The ClO2 solution can be discharged for use as a portable sprayer that can be used to treat surfaces infected by anthrax or other biological contaminants. When the bound reagent is chlorite, the complementary reagent is an acid or an oxidant. When the bound reagent is an acid or an oxidant, the complementary reagent solution is a chlorite solution.

Abstract: A water treatment apparatus includes a housing comprising multiple housing portions and a plurality of treatment sections disposed within the housing, each treatment section comprising at least one distinct particulate layer. The apparatus is designed so that no water pressure need be applied to force the water through the apparatus, as gravity pulls the water down through the filtering layers. Water may also be force fed through the treatment apparatus; when the water is force fed, the housing portions need not be vertically stacked, but may be configured in any suitable arrangement. The treatment sections are distributed through the various housing portions in logical groups to perform various kinds of filtering. The housing portions are detachable and sealably stackable in multiple configurations, thus passing water through more or fewer treatment layers, depending on the quality of the incoming water.

Abstract: It is disclosed a process for removing at least a portion of the furfural and acetic acid in a first stream comprised of water, at least one compound selected from the group consisting of furfural and acetic acid, C5's and C6's. Such process comprises the steps of contacting the stream with an adsorption media which has been previously contacted with a second stream comprised of the same components and the adsorption media has been regenerated by exposing it to conditions, without being in contact with the second stream, such that at least 70% of the adsorbed furfural and acetic acid have each been desorbed and at least 60% of the C5's and C6's remain adsorbed on the media.

Abstract: A water filtration system having a tank, a fluid flow interface into the interior of the tank, and a control valve. The control valve is in fluid communication with the fluid flow interface. The control valve includes a source water inlet for receiving a flow of source water, a drain outlet, a treated water outlet and an air inlet, the control valve being operable to control a passage of fluids between the inlets and the outlets and the fluid flow interface. A filtration media is contained within the tank which includes a media mixture of manganese dioxide coated silica core filtration media and iron hydroxide filtration media. The control valve may be programmed to perform a filtering service process, a backwashing process and an air downflow process.

Abstract: A highly efficient method for treating contaminated water streams from any source where alkanlinity, hardness, or dissolved solids need to be removed before the water is discharged to the surrounding environment or sent to a secondary treatment facility.

Abstract: In one embodiment, a reactive filtration method includes continuously regenerating a reactive filter media while simultaneously filtering contaminants from fluid flowing through the filter media. In one embodiment, regenerating the reactive filter media comprises mixing metal granules with the filter media and agitating the mixture. In another embodiment, regenerating the reactive filter media comprises introducing a metal in the fluid flowing through the filter media and agitating the filter media. In one embodiment, a method for removing phosphorus, arsenic or a heavy metal from water includes introducing a metal salt reagent into the water at a molar ratio of 5:1 to 200:1 to the phosphorous or the arsenic in the water and passing the water through a bed of moving sand.