245 results about "Permeable reactive barrier" patented technology

The invention discloses a transmitting method and device of a channel status information reference signal and a receiving method and device of the channel status information reference signal. The method comprises the steps of: respectively ensuring a crime scene investigation-remote sensing (CSI-RS)-carried root explorer (RE) in the REs which are included by each permeable reactive barrier (PRB) of a multicast single frequency network (MBSFN) subframe and except the RE which carries a physical downlink control channel (PDCCH), a computer reservation system (CRS) and a data management-remote sensor (DM-RS) aiming at each cell; mapping CSI-RS which needs to be transmitted to the cell into the ensured RE; and transmitting the MBSFN subframe to a plurality of user terminals in each cell. The invention provides a specific technical solution through which a base station transmits the CSI-RS in the MBSFN subframe and the user terminals receive the CSI-RS in the MBSFN subframe.

The invention relates to a soil remediation method, which comprises the following steps that: 1) a liquid injecting well for injecting chitosan leacheate through a pump is arranged in a soil polluted area, the chitosan leacheate enters the inside of polluted soil through the liquid injecting well, soil percolate seeps through underground water, and heavy metal active ingredients in the soil and the underground water are eluted by the chitosan leacheate to form stable chitosan-metal chelate; and 2) a permeable reactive barrier filled with active substances is constructed in a direction which is vertical to the flow direction of the underground water at the periphery of the liquid injecting well, the soil percolate and the polluted underground water flow through the permeable reactive barrier filled with the active substances, and polluted substances such as the chitosan-metal chelate and the like in the soil and the underground water are removed. Through the soil remediation method, heavy metals in the soil can be effectively removed, a polluted underground water system can be remediated, and most of the heavy metals contained in the soil and the underground water can be gathered in the active substances of the permeable reactive barrier, so that the heavy metals can be recycled. The heavy metal content of the remediated soil and the water quality of the percolate passing through the reactive barrier meet the corresponding national standard.

The invention discloses a permeable reactive filler for removing nitrate organisms from underground water, a system and a filling method thereof, and belongs to the field of underground water pollution remediation. The filler for the permeable reactive barrier system is formed by the mixture of biological slow release carbon source materials, pH buffer nutrient element materials and bacteria enrichment water treatment fillers, the process inlet and outlet areas of the permeable reactive barrier system are filled with water treatment filters, a process reaction area is filled with the mixture of quartz sand or basalt and fillers, and the bacteria enrichment water treatment fillers inoculated with acclimatized native denitrifying bacteria. According to the invention, slow release carbon source materials, slow release pH nutrient element materials and water treatment fillers can be flexibly added, and the shortcomings that the carbon source materials are inoculated with hang membrane materials and native microorganisms in the remediation area are insufficient are avoided. The water treatment filters in the water outlet area are capable of preventing secondary pollution.

The invention provides a light promoting dehalogenation compound medicament/light combined method for removing halogenated organic matters in water, which relates to a method for removing halogenated organic matters in water. The invention overcomes various defects existing in the process of removing halogenated organic matters in water by using the current gas stripping method, activated carbon adsorption method, electrochemical removing method, advanced oxidation method, transition metal catalytic reduction method, vacuum ultraviolet technique or permeable reactive barrier technique. The method of the invention comprises the following steps: adding the light promoting dehalogenation compound medicament into the water containing halogenated organic matters for stirring, and then, carrying out optical radiation. The method of the invention does not need multi-stage removal, does not need expensive oxidants and catalysts, does not generate secondary pollution, does not need expensive vacuum ultraviolet light sources and high-energy radiation sources, can utilize common and cheap ultraviolet pop light sources or even expanding to visible light sources, improves the utilization efficiency of the light energy, can quickly remove the halogenated organic matters, can conveniently design a reactor, meets the requirements of various water bodies, is convenient in management, and can ensure the safety of the water quality.

The invention discloses an integrated analog device for groundwater pollution process and pollution remediation. The integrated analog device comprises an analog tank, wherein the analog tank is divided into a front part box and a rear part box, one side of each of the front part box and the rear part box is an open end, a permeable reactive barrier is arranged between the open ends of the two boxes, and two side surfaces, corresponding to the open ends of the two boxes, of the permeable reactive barrier are provided with vertically arranged sampling holes; the open ends of the two boxes are concave troughs, and a blocking plate is made of draw-out and insertion steel; the side walls on two sides of the analog tank are respectively provided with sampling holes and monitoring holes; the other sides of the two boxes are respectively provided with an upstream water tank and a downstream water tank, and a porous plate is respectively arranged between the upstream water tank and the boxes and between the downstream water tank and the boxes; and the bottom part of the outer side wall of the upstream water tank is provided with a water inlet hole, the outer side wall of the downstream water tank is provided with vertically arranged overflow holes at different heights, and a water stop valve is arranged at the bottom part of the outer side wall of the downstream water tank. The invention also discloses a method for using the device.

A method comprises conducting a permeable-reactive barrier (PRB) treatment of a contaminated aqueous medium and in-well monitoring effectiveness of the permeable-barrier treatment. A system comprises a PRB zone to treat a contaminated groundwater and an in-well sensor located within a gradient of the contaminated groundwater or within the PRB zone to sense a characteristic of the groundwater.

A permeable reactive barrier is provided, wherein a remediation well is disposed in a groundwater reactive main well and includes a water suction well and an aeration well; an aeration pipe is disposed in the aeration well, connected to an air compressor on the ground, and mounted at the bottom center of the remediation well; an automatic sample collecting device is mounted in the aeration well; the space between the remediation well and the groundwater reactive main well is filled with a filter material; a permeable reaction treatment unit includes a plurality of reaction unit assemblies having an interlayer structure; positioning connecting grooves are provided between adjacent reaction units; the reaction units connected are disposed in the remediation well; interlayer space among the reaction units is loaded with a mixture biological filler material; a water quality analysis probe is mounted in the permeable reaction treatment unit; two-wing seepage-proof walls are disposed at twowing sides of the remediation well, and have longitudinal operation depth allowing the seepage-proof walls to penetrate the first phreatic aquifer; a discharged water monitoring tank is under the ground and is provided with a water quality and water level automatic monitoring system inside; a PLC control system is adopted by an automatic control system.

The invention belongs to the field of soil remediation and discloses an electrokinetic remediation method of heavy metal contaminated soil. The electrokinetic remediation method of heavy metal contaminated soil comprises the following steps of: preparing simulated heavy metal contaminated soil for later use; making an electrokinetic test device; and filling the simulated heavy metal contaminated soil into the electrokinetic test device; performing electrokinetic tests; and taking the simulated heavy metal contaminated soil one week later, and analyzing and testing heavy metals in the simulated heavy metal contaminated soil. The electrokinetic test device mainly comprises the following 5 reaction tanks in sequence: an anode chamber 1, a soil chamber 1, a cathode chamber, a soil chamber 2 and an anode chamber 2 in sequence, wherein a molecular sieve containing PRB (permeable reactive barrier) is arranged between two of the reaction tanks. The electrokinetic test device further comprises cathode and anode electrodes, cathode and anode working fluids and a direct-current stabilized-voltage power supply, wherein the cathode and anode electrodes and the cathode and anode working fluids are filled in the cathode and anode chambers.

The invention relates to a biological deoxidation denitrification device in oxidative environment groundwater. The device is a double-layer double-media permeable reactive barrier, the permeable reactive barrier is formed by an upstream layer and a downstream layer, the upstream layer is loaded with pine barks, and the downstream layer is loaded with zero valent iron. The invention also provides a biological deoxidation-heterotrophic/autotrophic denitrification combination method in the oxidative environment groundwater. The method comprises a process that the biological deoxidation denitrification device is laid in nitrate nitrogen polluted oxidative environment groundwater pollution plumage downstream soil and an underground water layer, and the device is vertical with the flow direction of the underground water.

The invention relates to an oxygen releasing material for permeable reactive barrier aerobic biodegradation of groundwater, which comprises the following components in percentage by weight: 5-20% of oxygen releasing compound, 5-20% of bentonite and the balance of coagulant. The oxygen releasing material added with the bentonite has the advantages of large oxygen releasing amount, long oxygen releasing time, low cost and easy preparation; and moreover, the used materials are all natural and easy to obtain and do not cause secondary pollution to the groundwater environment, thereby remarkably improving the in situ bioremediation technology of the contaminated groundwater.

The invention discloses an in-situ chemical oxidation restoration method for chlorinated olefin-polluted soil and underground water, comprising the following steps of: putting a permeable reactive barrier in a reactive tank and transversely arranging a compound potassium permanganate release system in the permeable reactive barrier, wherein the compound potassium permanganate release system is prepared from paraffin, silica sand and potassium permanganate; then diluting a high-concentration TCE (Trichloroethylene) liquor on line to keep the concentration of chlorinated olefin between 0mg/L and 100mg/L, controlling the flow speed of the TCE liquor in the reactive tank at 71.4cm/d, and guiding the TCE liquor to flow in from the water inlet end of the reactive tank and flow out from the water outlet end of the reactive tank after flowing through the permeable reactive barrier to finish water treatment. When the method is used for water treatment, the removal rate of TCE after two days can reach 100% and the removal rate of the TCE can be kept at 100% through continuously restoring for thirty-three days. The method disclosed by the invention has a short restoration cycle and no secondary pollution and can be used for restoration for a long term; the potassium permanganate, the paraffin and the silica sand are cheap and easy to get; and a good chlorinated olefin treatment effect can be achieved on the premise of rational cost so that the prospect is broad.

The invention relates to a permeable reactive barrier dielectric material used for remedying underground water pollution, which comprises the following components in percentage by weight: 20 to 30 percent of sintering aggregate, 15 to 25 percent of CaO2, 5 to 10 percent of MgO2, 10 to 15 percent of FeO and the balance of peat, wherein the aggregate is prepared from 1 to 3 of coal ash, 1 to 3 of clay, 1 to 3 of zeolite and 1 to 3 of gypsum in proportion by weight by preheating and high-temperature sintering. In the invention, after the compound material is filled in a permeable reactive barrier, underground water which is suffered from multiple pollution of heavy metal, organic matter and the like can be remedied at the same time; the treatment effect of the material is greatly superior to that of an active medium made of a single material. Meanwhile, the material has long service life, and replaced materials are nontoxic and innocuous. The invention is beneficial to the popularization and the application of a novel underground water pollution remediation technology-a permeable reactive barrier technology.

A process for insitu treatment of at least one contaminant in a groundwater plume, the process comprises the steps of: installing a permeable reactive barrier in the flow path of the groundwater plume, wherein the installation of the permeable reactive barrier comprises the steps of: boring a first borehole with a portion longitudinally extending substantially parallel with an upper surface of the groundwater plume; filling the longitudinally extending portion of the first borehole with a reactive material comprising a solid reactant configured to react with the at least one contaminant in the groundwater plume to produce at least one product having less hazardous characteristics than the at least one contaminant; boring a second borehole with a portion proximate, substantially adjacent or overlapping the longitudinally extending portion of the first borehole; and filling the portion of the second borehole proximate, substantially adjacent or overlapping the longitudinally extending portion of the first borehole, with the reactive material.

Zero valent metal composite, manufacturing thereof, using thereof, and system including thereof, for (in-situ or ex-situ) catalytically treating contaminated water, such as sub-surface water, surface water, above-surface water, water vapor, or/and gaseous water. Composite includes powdered diatomite matrix incorporated with nanometer (1-1000 nm) sized particles of a zero valent (transition) metal (iron, cobalt, nickel, copper, zinc, palladium, platinum, or/and gold) and at least one electron transfer mediator (catalyst) from porphyrinogenic organometallic complexes (e.g., metalloporphyrins (chlorophylls, hemes, cytochromes) or metallocorrins (e.g., vitamin B₁₂), and optionally, includes vermiculite. System includes composite and in-situ or/and ex-situ unit containing the composite, enabling exposure of contaminated water thereto. Applicable to in-situ sub-surface permeable reactive barriers (PRBs). Treatable water contaminants are organics (halogenated organic compounds), or/and inorganics (metal elements, metal element containing inorganic species, nonmetal elements, and nonmetal element containing inorganic species). Applicable to non-aqueous fluids (liquids, vapors, gases), for removing contaminants therefrom.

The invention discloses a treatment device and a treatment method for acid wastewater polluted by mine heavy metals. By virtue of the treatment device, liquid can flow among a sedimentation tank, a reduction device, a desulphurization device, a PRB (Permeable Reactive Barrier) device and a pH regulating tank through a pump system and a water guide pipe system, so that the reduction of sulfate in the wastewater, desulfurization of the wastewater, removal of heavy metal pollution and the pH regulation of the wastewater are achieved. The treatment device and the treatment method have the advantages of simple process, simple operation, low cost, high efficiency and capability of realizing large-scale and engineering application of treatment of acid wastewater polluted by the mine heavy metals; meanwhile, the pollutants are placed in a relatively closed space in the whole technological process, so that the secondary pollution in the pollution treatment process can be effectively avoided, thus the treatment device and the treatment method can be widely applied to the safe treatment of acid wastewater polluted by different types of mine heavy metals, and the pollution caused by the heavy metals such as arsenic, lead, copper, zinc, chrome, cadmium and the like in the wastewater can be effectively removed.

A restoring device for treating fluorine pollution of groundwater mainly comprises a water pumping well and at least one water injection well, wherein a water suction pump is installed in a well pipe of the water pumping well, and a booster pump is installed in a well pipe of the water injection well. The part of the well pipe of the water pumping well and the part of the well pipe of the water injection well, which are located below the water level, are provided with well sieves. A water conveying pipe is connected between the water suction pump and the booster pump, the well pipe of the water pumping well and the well pipe of the water injection well are respectively arranged on respective protecting walls with holes, a fluorine-removed restoring material is filled in the well sieves of the well pipes and the protecting walls to form a permeable reactive barrier, and materials having supporting effects are filled in parts above the well sieves of the well pipes and the protecting walls. The invention further provides a restoring method for treating fluorine pollution of the groundwater. Compared with traditional in-situ ex-situ restoring technologies, the restoring device and the restoring method have high applicability and repair rate for the polluted groundwater.

The invention relates to a persulfate slow-release material used for a permeable reactive barrier, which is granular and comprises an active oxidizing agent, a stabilizing, curing and binding agent, zeolite and water, and the mass ratio of active oxidizing agent to stabilizing, curing and binding agent to zeolite to water is 1:1.4-1.7:0.5-0.7:0.9-1.2. The invention also discloses a method for preparing the persulfate slow-release material. With the persulfate slow-release material provided by the invention, the dissolution speed of oxidizing solid granules namely persulfate in the permeable reactive barrier can be obviously reduced, and the service life of the permeable reactive barrier can be further prolonged.

The present invention uses fish bones and fish hard parts to remediate, clean-up, stabilize, immobilize, or otherwise treat metal-contaminated water, soil or waste of any sort. The fish bones and fish hard parts can be mixed in with soils and wastes, or emplaced as a permeable reactive barrier in a trench or excavation, or emplaced as a liner or barrier surrounding a waste form, disposal site, or contaminated site. All that is needed is intimate contact between the fish bones and fish hard parts and the contaminated waste form, soil particles, or water. In a system of, for example, soil, waste, groundwater, surface water, waste streams, or the digestive tracts of animals, the presence of fish bones and fish hard parts reduces the amount of metal that can mobilize and migrate out of the system. Fish bones and fish hard parts remove metals from waters passing through the system or originating within the system. Fish bones and fish hard parts reduce the bioavailability of metals to organisms coming into contact with the system and from water leaving the system. The fish bones and fish hard parts can be mixed with any other material, e.g., gravel, sand, clay, zeolites, soils of all types, iron filings, cement, compost, straw, or organics of all types.

This invention is directed to a process for treating the flow of anaerobic groundwater through an aquifer with a primary treatment media, preferably iron, and then passing the treated groundwater through a second porous media though which an oxygenated gas is passed in order to oxygenate the dissolved primary treatment material and convert it into an insoluble material thereby removing the dissolved primary treatment material from the groundwater.

The invention provides a comprehensive treatment method for acid mine water of small abandoned coal mines. A slurry is injected into a grouting filling layer, a plugging surface layer is formed afterthe slurry is solidified, the underground water supplementary amount of atmospheric precipitation to underground mined-out areas of the abandoned mines in a target area is reduced, and a permeable reactive barrier, a continuous alkali production pool and a constructed wetland section are continuously arranged at mine wellheads of the small abandoned coal mines with relatively good maintenance conditions; a drainage canal collection system is built around surface rivers in the target area; coal gangue piles in the target area are subjected to closed treatment. The integrated technical scheme realizes comprehensive treatment of the acid mine water in a number of small abandoned coal mines distributed in the target area, and has the advantages of high practicability, low cost and good effect.

The invention discloses a permeable reactive barrier composite material for repairing underground water polycyclic aromatic hydrocarbon contamination and a preparation method thereof, and belongs to the technical field of underground water repairing. The composite material comprises a sustained-release filling layer and a shell, wherein the sustained-release filling layer is prepared from the following components: 8.9-12.8 percent of zero-valent iron powder, 24.1-30.6 percent of a carbon release raw material, 16.6-20.3 percent of a plastic adhesive raw material, 5.5-8.3 percent of a high-permeable raw material and the balance of water; and the shell is prepared from 9.7-11.6 percent of a high-permeable raw material, 47.2-52.3 percent of a plastic adhesive raw material and the balance of water. The permeable reactive barrier composite material is low in cost and simple and convenient to prepare, has an effect of sustainably releasing iron ions and carbon sources, can be used for decomposing polycyclic aromatic hydrocarbon organic contamination under the underground water anoxia condition, and has a wide application prospect in the field of underground water contamination repairing.

The invention relates to a double-layer permeable reactive barrier system for repairing chromium-polluted underground water. The double-layer permeable reactive barrier system comprises a reduction reaction barrier and an adsorption reaction barrier behind the reduction reaction barrier, wherein the space between the reduction reaction barrier and the adsorption reaction barrier is 2.5-5m, the bottom ends of the reduction reaction barrier and the adsorption reaction barrier stretch into an impervious bed by at least 0.60-0.8m, and the tops of the reduction reaction barrier and the adsorption reaction barrier are 0.4-0.5m higher than the maximum water level of the underground water. When the double-layer permeable reactive barrier system is used, the polluted stream sequentially flows through the reduction reaction barrier and the reduction reaction barrier; when flowing through the system, the chromium-polluted underground water firstly flows through the reduction reaction barrier to generate a reduction reaction with zero-valent iron powder to convert hexavalent chromium into trivalent chromium, and organic matters in straw can be taken as electron donors to accelerate the reduction of the hexavalent chromium; a biomass adsorbent has a huge surface area, the residual pollutants can be strongly adsorbed by the adsorption reaction barrier, so that the problems that a reductant is washed away, reduction products are diluted and washed away, the reduction of the hexavalent chromium cannot be realized when the utilization of the reductant is saturated, and the like are solved, and the chromium pollution in the underground water is economically and efficiently removed.

The invention discloses a composite reaction medium for removing nitrogen and phosphorus from underground water permeable reactive barriers and a method for preparing the composite reaction medium. The composite reaction medium comprises, by weight, 1.0-3.0 parts of zeolite, 0.7-1.3 parts of bentonite, 0.5-1.5 parts of attapulgite and 1.0-6.0 parts of coal cinder. The zeolite, the bentonite, the attapulgite and the coal cinder are sintered to obtain the composite reaction medium. The composite reaction medium and the method have the advantages that the nitrogen and the phosphorus can be synchronously, efficiently and quickly removed by the composite reaction medium, the composite reaction medium can be used as a biological carrier, accordingly, shortcomings of instability of biological phosphorus removal, large quantity of mud due to chemical phosphorus removal and the like can be overcome, and detour flow of water at the fronts of the barriers and the like can be prevented.

A permeable reactive barrier device for underground water treatment comprises a water inlet tank, a permeable reactive tank and a water outlet tank which are sequentially arranged in the underground water flow direction, wherein mesh gratings are arranged among the water inlet tank, the permeable reactive tank and the water outlet tank; a water inlet is arranged on the other side wall, opposite to the permeable reactive tank, of the water inlet tank, and a sampling port is arranged at the top; a reactive medium layer is arranged in the permeable reactive tank and comprises a first limestone layer, a first activated carbon layer, a scrap iron layer, a porous ceramic filtering plate covered with a nano ceramic filtering membrane, a second activated carbon layer and a second limestone layer which are sequentially arranged in the underground water flow direction in an stacked manner; a sampling port is arranged at the top of the water outlet tank. A medium material used by the device has the characteristics of simplicity in preparation, rich raw material source, low cost and long service life, has good removal effects on the BOD, the COD, heavy metals and nitrates in underground water, and can improve the remediation capacity of a permeable reactive barrier to the polluted underground water.