403 results about "Contaminated water" patented technology

A method of adsorption includes contacting a nanocomposite with a solution including one or more pollutants. The nanocomposite is a graphite-phase carbon nitride copper oxide and magnesium aluminum oxide (g-C3N4@CuO / MgAl2O4) material and includes a graphite-phase carbon nitride (g-C3N4) in an amount of 5 to 15 percent by weight (wt. %), copper oxide in an amount of 3 to 7 wt. %, and magnesium aluminum oxide (MgAl2O4) in an amount of 80 to 90 wt. % based on a total weight of the g-C3N4@CuO / MgAl2O4 material. The method further includes adsorbing the one or more pollutants on the nanocomposite.

A method of making a covalent organic framework includes continuously feeding a first precursor and a second precursor to a flow reactor; heating, and mixing the first and second precursors; nucleating and growing the covalent organic framework; and continuously outputting the covalent organic framework from the third section of the flow reactor. A photo-reactor for treating contaminated water includes: a light source; an enclosed channel around the light source; a cover comprising one or more lights illuminating the enclosed channel; and a covalent organic framework cased within the enclosed channel, where the covalent organic framework is photo-catalytically active for degrading a contaminant in the contaminated water so as to produce treated water. A method of treating contaminated water includes feeding the contaminated water to the photo-reactor and contacting the contaminated water with the covalent organic framework.

The invention discloses an adsorption-extraction combined heavy metal polluted water remediation system and method, and belongs to the field of water pollution treatment. The system is provided with a sensing unit which collects data in real time through a heavy metal concentration sensor and the like; the model unit outputs key information such as adsorbent real-time saturation and the like based on the acquired data and an adsorbent saturation prediction model; the decision-making unit is used for calculating a dynamic threshold value according to the information, accurately judging regeneration time and optimizing regeneration parameters; the execution unit executes a regeneration operation according to the instruction. And the feedback unit feeds back the regenerated data to the model unit to realize dynamic optimization of the system. According to the method, closed-loop operation of data acquisition, processing, decision making and feedback is realized based on cooperation of all units of the system. According to the invention, the remediation efficiency of the heavy metal polluted water body is effectively improved, the regeneration of the adsorbent is accurately controlled, the operation energy consumption is reduced, the complex and changeable pollution working conditions can be better handled, and the effluent quality is guaranteed.

The invention discloses a device and a method for extracting a polluted water layer of a water source in a grading manner. The device comprises a first pipeline, a partition plate, a second pipeline, a water inlet assembly and a pushing assembly, the second pipeline is inserted into the first pipeline, and the first pipeline and the second pipeline are sleeved and fixed; the multiple partition plates are distributed between the first pipeline and the second pipeline at intervals and used for forming a multi-layer liquid cavity, and the liquid cavity is used for storing liquid; the water inlet assembly is slidably arranged outside the first pipeline in a sleeving mode and used for guiding liquid into the liquid cavity. The pushing assembly fixedly sleeves the top of the first pipeline and is used for pushing the water inlet assembly to do linear motion in the length direction of the first pipeline. According to the device, liquid at different depths is isolated, the mixing phenomenon of the liquid at different depths is prevented, and the collection of the liquid at different depths underground is completed.

A method of removing a contaminant from water may include contacting contaminated water, including a heavy metal and / or an organic pollutant, with a nanocomposite including graphitic C3N4, MnO2, and MgAl2O4 in a mass relationship to each other in a range of from 5 to 15:2 to 7:75 to 95, thereby adsorbing the heavy metal and / or the organic pollutant onto the nanocomposite, as an adsorbed material. The method may further include removing the adsorbed material from the contaminated water, thereby reducing a concentration of the heavy metal in the contaminated water by at least 2 percent by weight (wt. %), the heavy metal may include Cd, Cr, Cu, Fe, Pb, Ni, Ag, Zn, and / or U, and the organic pollutant may include a dye.

The present invention relates to layered multi-metal-oxide-based magnetic biochar and a preparation method and use thereof. The preparation method includes: S1. mixing biomass and an iron salt solution for impregnation, and then adjusting a first pH value of a solid phase material after solid-liquid separation to obtain pretreated biomass; and S2. pyrolyzing the pretreated biomass to obtain magnetic biochar, then mixing the magnetic biochar with a solution containing at least two metal salts and adjusting a second pH value, and then performing hydrothermal treatment to obtain the layered multi-metal-oxide-based magnetic biochar. The obtained layered multi-metal-oxide-based magnetic biochar has a large specific surface area, magnetic properties, a layered morphology, and strong adsorption capacity, and can be applied to the treatment of arsenic- and cadmium-containing composite contaminated water bodies, and also to arsenic and cadmium passivation in farmland soil, thereby reducing health risks of crops in the food chains, and ensuring food safety.

A system for reconditioning contaminated water includes a plurality of filter tanks, each filter tank configured to hold a media mixture comprising media particles to which contaminants adhere when the contaminated water is pumped through the filter tanks and a feed water pump to pump the contaminated water through the plurality of filter tanks. The plurality of filter tanks are configured to form a multistage filter system for filtering the contaminated water at different contaminant particle sizes, and the feed water pump pumps the contaminated water through the multistage filter system in a continuous manner during a normal filtering mode.

A system and method for water desalination using forward osmosis to address problems associated with scarcity of freshwater around the world. The system uses ammonium bicarbonate as the draw solution to draw out freshwater through a forward osmosis (FO) membrane from an amount of saltwater or other contaminated water initially directed through one side of the FO membrane. The ammonium bicarbonate draws the desalinated water through the membrane of the FO membrane. Brine or other solutes are directed away. The combination of desalinated water and ammonium bicarbonate is directed through a series of valves and pumps, including a heat pump, and through a hydrophobic membrane that allows freshwater (product water) to be obtained from the desalination process in a more cost-effective and efficient manner. The ammonium bicarbonate is recycled and reused to generate additional draw solution for additional batches of saltwater or contaminated water for desalination.

A system for reconditioning contaminated water includes a plurality of filter tanks, each filter tank configured to hold a media mixture comprising media particles to which contaminants adhere when the contaminated water is pumped through the filter tanks and a feed water pump to pump the contaminated water through the plurality of filter tanks. The plurality of filter tanks are configured to form a multistage filter system for filtering the contaminated water at different contaminant particle sizes, and the feed water pump pumps the contaminated water through the multistage filter system in a continuous manner during a normal filtering mode.

The invention belongs to the technical field of algae removal and water purification, and particularly relates to an algae removal and water purification method, a related synergistic composition, application and a preparation method. An organosilicon quaternary ammonium salt modified clay SiQAS-MC material is used as a matrix, one or more of high-valence metal ions or high-charge-density polymers of the high-valence metal ions are introduced, and after a composite material is formed, the composite material is put into a water body for use; or when the SiQAS-MC is used, one or more of high-valence metal ions or polymers with high charge density are added, and the SiQAS-MC is synchronously added into the water body for use. In conclusion, the synergistic composition can significantly improve the removal efficiency of SiQAS-MC on various algae, has triple water purification effects of removing phosphorus, descending turbidity and adjusting pH, and is suitable for emergency treatment of harmful algal blooms in water and remediation of polluted water.

A method of photocatalytic degradation includes contacting a nanocomposite with a solution including one or more pollutants. The nanocomposite is a graphite-phase carbon nitride copper oxide and magnesium aluminum oxide (g-C3N4@CuO / MgAl2O4) material and includes a graphite-phase carbon nitride (g-C3N4) in an amount of 2 to 20 percent by weight (wt. %), copper oxide in an amount of 1 to 10 wt. %, and magnesium aluminum oxide (MgAl2O4) in an amount of 75 to 95 wt. % based on a total weight of the g-C3N4@CuO / MgAl2O4 material. The method further includes irradiating the nanocomposite with light having a wavelength of 400 to 800 nm in the absence of UV light to photocatalytically degrade the one or more pollutants in the solution.

To provide a method for recovering a drying operation in drying of an adsorbent in an adsorption tower capable of preventing movement of the adsorbent downstream during restoration of a drying operation after stop of drying the adsorption tower and thereby enhancing safety.SOLUTION: A method for recovering a drying operation, in which a vacuum pump 13 is connected downstream of an adsorption tower 10 via piping to reduce pressure inside the adsorption tower 10 by sucking air containing water vapor W1, for restoring, upon stop of a drying operation for drying an adsorbent in an adsorption tower 10 that adsorbs radioactive substances contained in contaminated water, includes: restarting the vacuum pump 13 so that the internal pressure of the adsorption tower becomes a set degree of vacuum on the basis of an operating condition under which the adsorbent inside the adsorption tower 10 does not flow; and the vacuum pump 13 operating for a running time of 45 minutes or more and 60 minutes or less from the start of the restart so that the internal pressure of the adsorption tower becomes 2.4 kPa.SELECTED DRAWING: Figure 1

The application discloses a method for photocatalytic degradation of perfluorooctanoic acid in water by using boron hydroxide, and belongs to the field of wastewater treatment. The method comprises the following steps: adding boron hydroxide as a photocatalyst into water containing perfluorooctanoic acid, mixing thoroughly, and then performing a photocatalytic degradation reaction under a light source; the light source is ultraviolet light, yellow light or red light; and the pH of the water containing perfluorooctanoic acid ranges from 3 to 7. The method uses boron hydroxide (Al(OH)3, Ga(OH)3 and In(OH)3) which is low in cost and simple in preparation process to perform photocatalytic degradation of perfluorooctanoic acid, can improve the degradation efficiency of perfluorooctanoic acid in water, and can perform photocatalytic degradation under different light sources and in a wide pH range, so that the application range of photocatalysis is expanded, and the method is conducive to the treatment of PFOA contaminated water in actual production.

Systems and methods for treating water containing PFAS are disclosed. A bioreactor and a supercritical water oxidation (SCWO) system may be implemented to provide a complete chain of separation and destruction of PFAS to treat contaminated water. Adsorption media may be added to facilitate the removal of PFAS from water.

A method for creating colloidal gas aphrons (CGAs) and using the CGAs to remove contaminants from a contaminated water comprises feeding the contaminated water into a reactor; optionally adding at least one surface active substances to the reactor; fluidly connecting the reactor to a microbubble generation device that generates microbubbles therein; circulating the water from the reactor to the microbubble generation device and back to the reactor; creating the CGAs in the microbubble generation device and forwarding the CGA containing water to the reactor, wherein the CGAs adsorb the contaminates in the water and carries the contaminates to the surface of the water forming a layer of microfoam thereon; removing the layer of the microfoam; and extracting a treated water.

The invention provides an urban green land runoff pollutant intercepting and discharging method and device, electronic equipment and a storage medium, and relates to the technical field of urban water environment governance, and the technical scheme is characterized in that real-time pollutant concentration data and water flow velocity field data collected by a monitoring node in a preset path are acquired; identifying a plurality of potential pollution source areas; calculating pollution source coordinates and a diffusion trend; a sequential control strategy for opening and closing the sewage intercepting valve is generated, the sewage intercepting valve is controlled to be opened and closed according to the sequential control strategy, and the sequential control strategy comprises relay flow guide parameters of adjacent valves; when the pollutant concentration data shows that the pollutant concentration exceeds a threshold value, the mobile emergency treatment unit is started according to a sequential control strategy, and multi-stage treatment of the polluted water body is executed. The urban green land runoff pollutant intercepting and discharging method and device, the electronic equipment and the storage medium have the advantages that dynamically changing pollution sources can be rapidly recognized and accurately positioned, and effective pollutant intercepting and treatment are achieved.

The invention discloses a water pollution detection device which comprises a collection bottle fixing device, a control assembly, a telescopic assembly and a collection bottle, the control assembly is arranged in the collection bottle fixing device, the telescopic assembly is arranged at the top of the collection bottle fixing device, and the collection bottle is arranged in the collection bottle fixing device. The invention belongs to the technical field of water pollution detection. The underwater depth of the collection bottle fixing device is adjusted by controlling the extension and retraction of the circular telescopic rod of the telescopic assembly; a filter screen arranged on a collection bottle fixing device of the telescopic assembly can filter floating objects on the water surface, and garbage is prevented from being mixed into a collection bottle; opening and closing of different water taking holes are controlled by rotating an octagonal knob at the top of an octagonal telescopic rod of the telescopic assembly, so that layered collection of sewage by the collection bottle is realized; after collection is completed, when the sealing cover plate closes the water taking hole, the sealing sliding cover can be driven to move to seal the bottle plug, and the situation that the water sample is polluted due to secondary opening of the collection bottle is prevented.

The invention relates to the technical field of drinking water treatment, and discloses a water treatment method and device for removing 2-EDD in drinking water source water, and the technical concept is as follows: a water plant pretreatment process is added before a coagulation process, when the drinking water source water is polluted by 2-EDD, the concentration of 2-EDD is detected, and the water polluted by 2-EDD is pumped and conveyed to the water plant pretreatment process; in the pretreatment process of a water plant, powdered activated carbon with the concentration of 2-EDD being more than ten thousand times of that of the 2-EDD is added to pre-adsorb the 2-EDD, and then the adsorbed powdered activated carbon is intercepted through coagulation, precipitation and filtration processes in sequence, so that the purpose of removing the 2-EDD in the drinking water is achieved. According to the method, the water plant pretreatment process is added before the coagulation process, the powdered activated carbon with the concentration of 2-EDD being more than ten thousand times of that of the 2-EDD and ground to the required mesh number is added in the water plant pretreatment process to pre-adsorb the 2-EDD, and the 2-EDD in the water is adsorbed and removed by fully utilizing the great specific surface area and excellent adsorption performance of the powdered activated carbon; the factory water odor and taste indexes reach the standard.

The disclosure relates to a purification system and a purification bag (6) for use therein, configured for (solar) heat-driven water purification of contaminated water. The purification bag (6) comprises a distillation assembly (601,..60n), comprising: - a contaminated water chamber (30) for collecting contaminated water, the contaminated water chamber (30) comprising a top sheet configured for absorbing heat; - a purified water chamber (50) for collecting purified water, the purified water chamber (50) comprising a condensation sheet configured for collecting condensed purified water; - a membrane (40) arranged between the top sheet and condensation sheet, the membrane dividing the distillation assembly into the contaminated water chamber (30) and the purified water chamber (50), wherein the membrane (40) comprises a membrane sheet configured for separation of the associate part of the contaminated water portion received by the distillation assembly into the purified water portion and a residual water portion comprising water and contaminants remaining in the contaminated water chamber by at least one of membrane distillation and pervaporation through the membrane sheet; wherein the top sheet and the membrane sheet are polymeric sheets that are bonded to each other by welding according to a welding pattern.

The invention relates to a preparation method of biochar particles capable of repairing a water body polluted by multiple heavy metals. The preparation method comprises the following steps of biomass pretreatment, ferric salt impregnation, pyrolysis, CO2 activation, TiO2 coprecipitation loading, surface activation, PNIPAM graft polymerization, granulation, screening and drying, recovery after material use, temperature control desorption and reutilization of the biochar particles. The method has the following advantages and effects that various heavy metals in the polluted water body can be efficiently removed, and the method is easy to recycle and can be recycled.

There is disclosed magnetic covalent organic frameworks (COFs) functionalized with Fe3O4 nanoparticles (Fe3O4@HMN-COF, Fe3O4@MAN-COF, and Fe3O4@SIN-COF) for the efficient removal and degradation of imidacloprid (IMI) from aqueous solutions. These COFs, incorporating nitrogen-rich frameworks and π-electron systems, enhance IMI adsorption through π-π interactions, hydrophobic interactions, and hydrogen bonding. The magnetic properties provided by Fe3O4 nanoparticles allow rapid separation from water using an external magnetic field. The COFs exhibit high surface areas, with BET surface areas reaching up to 910 m2 / g, and high adsorption capacities, up to 600 mg / g. The COFs also exhibit excellent stability, high surface area, and reusability, with minimal loss in performance over multiple cycles. Photocatalytic degradation of IMI is optimized under UV light, with Fe3O4@HMN-COF achieving 98.5% degradation efficiency under specific conditions. These magnetic COFs present a sustainable solution for remediating pesticide-contaminated water, demonstrating effectiveness in various real-world applications.

Provided is a water treatment apparatus and method that purifies polluted water or the like that is contaminated with difficult-to-decompose organic substances such as organic fluorine compounds, and that has a simple structure and is easy to operate. [Solution] The water treatment device 1 is composed of a treatment tank 10, a plasma micro-bubble generator 20 and a high-voltage power supply unit 30. A high voltage is applied from the high-voltage power supply unit 30 to a fluid F containing micro-bubbles FB flowing out from the plasma micro-bubble generator 20 to generate discharge plasma inside the micro-bubbles FB, which is then mixed with the water to be treated WD contained in the treatment tank 10, thereby decomposing difficult-to-decompose organic substances present in the water to be treated WD.

The invention discloses a polyurethane foam loaded schwertmannite material as well as a preparation method and application thereof, and belongs to the technical field of environmental governance materials. According to the material, polyurethane foam is added in the synthesis process of the Schwertmannite to complete loading of the Schwertmannite, the material has the advantages of efficient arsenic removal of the Schwertmannite and good adsorption performance of the polyurethane foam, and when the material is applied to treatment of arsenic-polluted water, efficient removal of arsenic can be achieved, and the material is greener and more environmentally friendly. The polyurethane foam loaded Schwertmannite material is simple in preparation process and has a good regeneration effect, regeneration and reutilization are achieved through elution of an alkaline solution, it is verified that the arsenic removal effect of the polyurethane foam loaded Schwertmannite material is not obviously affected, the utilization rate of the Schwertmannite material is greatly increased, and the treatment cost of arsenic-polluted water is reduced. The material provided by the invention can be suitable for in-situ treatment of different arsenic-polluted water bodies, is simple in use process and low in cost, and has a good application prospect.

The invention discloses a rapid treatment device and method for neonicotinoid pesticide polluted water in a river network area, and belongs to the technical field of water treatment. The device comprises a mixing unit, a settling separation unit and an adsorption medium circulating unit, the mixing unit is provided with a tangential water inlet and an adsorption medium feeding port; the settling separation unit is used for realizing rapid gravity separation of the adsorbed medium and water; and the adsorption medium circulation unit is used for medium recovery and regeneration. The invention also discloses a special core-shell structure composite particle adsorption medium and a preparation method thereof, and a rapid adsorption treatment method based on the device. Through the physical process of eddy enhanced mixing-rapid settling separation, the problems that a traditional adsorption technology is low in treatment speed, prone to blockage and low in flux are solved, and the device and the method are particularly suitable for emergency treatment of sudden and large-flow trace neonicotinoid pesticide polluted water in river network areas and have the advantages of being rapid in response, large in treatment flux, reliable in operation and low in cost.

The process for producing and using polymeric Hydrocells for production of atmospheric water using a superabsorbent polymer derived from alkaline hydrolysis of the polyacrylonitrile (PAN). The Hydrocell adsorbs up to 80% of its weight in atmospheric water under ambient conditions and releases this water when heated to less than 100° C. using renewable energy sources, such as solar energy. This low-temperature operation allows for repeated adsorption and desorption cycles lasting years without degradation. Multiple Hydrocells can be arranged into Hydrobatteries with a surface area greater than 2 m2, capable of adsorbing several kg of water per day. The Hydrocells offer a sustainable and safe solution for producing potable water free of toxic chemicals and pathogenic microorganisms in regions with limited water resources. By drawing water from the vast atmospheric reservoir containing over 13,000 km3, this can help prevent deaths caused by the consumption of contaminated water.

An apparatus for separating an amount of a substance from water which is contaminated with the substance, the apparatus comprising: a chamber having an inlet which is arranged in use to admit thereinto an amount of the contaminated water which includes an initial concentration of the substance; a gas introduction device which in use admits gas into the chamber, the introduced gas for inducing water to flow within the chamber, and for producing a froth layer which is formed at, and which rises above an interface with the said flow of water and introduced gas in the chamber, the froth layer including an amount of water and also a concentrated amount of the substance when compared with its initial concentration; wherein the apparatus is arranged in use to control the water content of the froth layer which rises above the interface, to influence the concentration of the substance therein; wherein the apparatus further comprises a froth layer removal device in which at least some of the froth layer is collapsed during removal of at least some of the froth layer from the uppermost region of the chamber, and wherein the apparatus further comprises a secondary treatment device in use for treating the collapsed froth layer for removal of the concentrated substance, wherein the secondary treatment device includes at least one of the group comprising: absorption (using activated carbon, clay, or ion exchange resins), filtration (using reverse osmosis membranes); vacuum distillation; drum drying; and introduction of further quantity of gas into a separate containment apparatus to produce another froth layer comprising a further concentrated amount of the substance.

Various embodiments provide methods for removing concentrations of PFAS from a contaminated stream of water or leachate. In a primary pretreatment stage, the incoming contaminated water is mixed with a hydrophobically associative gelling aid to generate an electroactive microgel with PFAS. In a secondary electrochemical oxidation stage, the electro-active microgel is reacted to reduce the PFAS carbon chain length. In a tertiary electrochemical coagulation stage, microhydrogels are generated which adsorb the degraded PFAS molecules and form microflocs. Lastly nanoparticles are added to the micro hydroflocs to aggregate the micro hydroflocs into macroflocs for easy flotation and removal.

The invention provides a preparation method of a TBBPA selective adsorption film. The method comprises the following steps: 1) synthesizing mesoporous silica nanoparticles; the invention discloses a TBBPA selective adsorption membrane and a preparation method thereof, the TBBPA selective adsorption membrane comprises the following steps of 1, TBBPA preparation, 2, base membrane synthesis and 3, blotting membrane synthesis, the TBBPA selective adsorption membrane is suitable for selective adsorption and separation of TBBPA from polluted water, through the design of blotting sites, TBBPA can be selectively adsorbed from analogues, and the TBBPA selective adsorption membrane has good application prospects in the field of selective separation of high-concentration TBBPA pollutants.

The present disclosure falls within the technical area of miniaturized systems, in a laboratory and / or experimental context, defining a water treatment station. The station of the present disclosure and the elements contained therein are miniaturized compared to large-size plants such as water treatment plants included in major infrastructures. The station of the present solution allows, in an innovative way, contaminated water to be analysed and treated and said treatment to be carried out in a miniaturised structure containing at least two tanks, wherein a first tank (B101) comprises at least one water inlet and one water outlet and a second tank (B102) comprises at least one water inlet and one water outlet, the water outlet being formed in a side section of the second tank (B102).

The present invention relates to a method for sanitising, disinfecting or sterilising microbially contaminated water-containing fluids, comprising treating the microbially contaminated water-containing fluid with an oxidising agent, wherein a fluorescence measurement is carried out on the water-containing fluid before, after and / or during treatment of the microbially contaminated water-containing fluid with the oxidising agent. The fluorescence measurement comprises irradiation with an excitation wavelength characteristic of a fluorescent protein and / or peptide building block and measurement of the corresponding fluorescence signal, and the method is characterised in that treatment with the oxidising agent proceeds in such a way that addition of the oxidising agent is controlled as a function of the fluorescence signal. The invention further relates to a corresponding device for sanitising, disinfecting or sterilising microbially contaminated water-containing fluid.