336 results about "Contaminated water" patented technology

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.

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.

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.

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.

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.

The utility model relates to an aluminum shell cleaning wastewater recycling treatment system, including cleaning machine pure water tank, quartz sand filter vat, activated carbon filter vat, heating water tank, cleaning machine cleaning tank, sewage collection pond and filter water bucket, the output of cleaning machine pure water tank is connected sewage collection pond, and the top one side of cleaning machine pure water tank is provided with overflow sewage outlet, and the slightly contaminated water of cleaning machine is collected to sewage collection pond through overflow sewage outlet, the output of sewage collection pond is connected quartz sand filter vat, and the output of quartz sand filter vat is connected with activated carbon filter vat, and activated carbon filter vat is connected filter water bucket through pipeline, filter water bucket connects heating water tank, and heating water tank is connected cleaning machine cleaning tank through pipeline, and the on -line detection instrument of PH value is set up on cleaning machine cleaning tank, the utility model can solve the pressure of sewage treatment, reduce the production cost of enterprise, make the cleaning of sewage only need simple processing to use, simple operation can greatly improve production efficiency.

A method of removing a contaminant from water may include contacting contaminated water, including an organic pollutant, with a nanocomposite including graphitic C3N4, Fe2O3, 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 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. %), and the organic pollutant includes a dye.

The present invention discloses a method for fixing heavy metals based on biochar, which comprises the following steps: (1) mixing biochar with contaminated water or contaminated soil to allow the biochar to capture heavy metals; (2) mixing a bacterial solution containing urease bacteria with the biochar with heavy metals captured in step (1) to allow the biochar to capture the urease-producing bacteria in the bacterial solution; and (3) mixing a binding liquid with the biochar with urease-producing bacteria captured in step (2), allowing the mixture to react with the binding liquid, wherein the binding liquid comprises calcium chloride and urea. The present invention improves the efficiency and long-term effectiveness of the biochar fixation of heavy metals and reduces the risk of secondary pollution after the biochar fixation of heavy metals.

A water treatment system for the treatment of red tide contaminated water is provided. The system utilizes a cavitation system combined with the addition of compressed air or concentrated oxygen into the fluid flow. The system is able to very efficiently destroy red tide organisms as well as the toxins they create—brevetoxins.

The invention discloses a device and method capable of dynamically monitoring heavy metal polluted water and soil repaired through an EICP technology, the device comprises a support, three monitoring systems and a grouting system, the first monitoring system comprises a measuring box, a top cover, a motor, a grouting hole, a transmission shaft, a gear, an inner gear ring, a stirring sampling pipe, a supporting rod, a sheet type multifunctional sensor and a sampling opening; the second monitoring system comprises a liquid conveying hose, a flow control valve, a peristaltic pump, a pump pipe, a measuring box, a raw material box, a waste liquid box, a conductivity meter and a magnetic stirrer; the third monitoring system comprises a support frame, a transfusion hose, a flow control valve, a peristaltic pump, a pump pipe, a centrifugal filter, a measuring box, a raw material box, a waste liquid box and an atomic absorption spectrophotometer; the grouting system comprises a urease solution barrel, a urea solution barrel, a three-way pipe and a suction pump. Biological, chemical and physical indexes in the repairing process can be monitored in real time, and the repairing process can be known.

The present application relates to a kind of carbonized iron and nitrogen coordination iron co-doped nitrogen and graphene carbon material and preparation method and application, with six hydrated ferric chloride as iron source, with chitin as nitrogen, carbon source. By simple one-step method, after mixing, calcination, grinding way, carbonized iron and nitrogen coordination iron co-doped nitrogen and graphene carbon material is synthesized.The material prepared by the present application presents two-dimensional layered structure, after adding potassium hydrogen peroxodisulfate oxidant, the material can completely remove the active pharmaceutical ingredient naphthyl in water in a short time.Naproxen.The synthesis method proposed in the present application is simple and easy to operate, and the material performance is excellent, which can provide a new design idea for nitrogen coordination iron nanomaterial supported by carbon material, and be applied to the remediation of contaminated water.

This invention discloses a composite nanofiber membrane for immobilizing microorganisms to remediate diesel-contaminated water and its preparation method. Specifically, the composite nanofiber membrane is a thermoplastic polyurethane / nanohydroxyapatite composite nanofiber membrane, which not only possesses excellent biocompatibility and mechanical strength but is also non-toxic and harmless, offering considerable cost-effectiveness. Upon introduction into diesel-contaminated water, the composite nanofiber membrane first rapidly adsorbs diesel at the water / oil interface, preventing further diffusion and toxic effects on the aquatic environment. Subsequently, due to the additional adsorption sites provided by the nanoparticles on the membrane, a large number of free bacteria are adsorbed onto the membrane, enhancing the metabolic activity of bacterial cells and their resistance to the toxicity of stubborn compounds, while also strengthening the affinity between hydrophobic compounds and cells, thereby increasing the degradation rate of diesel hydrocarbons by microbial cells. This invention improves the remediation effect of diesel wastewater while expanding the application of composite nanofiber membranes in the field of water pollution treatment.

The present invention provides a method (100) of operating a centrifugal separator (1) The centrifugal separator (1) comprises a centrifuge bowl (10) arranged to rotate around an axis of rotation (X) and in which the separation of a liquid mixture takes place, a stationary hood (2) which defines at least part of a surrounding space (3) in which said centrifuge bowl (10) is arranged, a drive member (4) configured to rotate the centrifuge bowl (10) around the axis of rotation (X). The centrifuge bowl (10) further comprises an inlet (11) for receiving the liquid mixture to be separated and at least one liquid outlet (12, 13) for discharging a separated liquid phase. The method (100) comprises the steps of a) separating (101) the liquid feed mixture into at least one separated liquid phase in the centrifuge bowl (10); b) collecting (103) contaminated water from at least one unit of the centrifugal separator (1); and c) resupplying (106) said contaminated water to the centrifugal separator to flush the surrounding space (3). The present invention further provides a centrifugal separation system (200) for separating at least one liquid phase and a solid phase from a liquid feed mixture.

The utility model discloses a polluted water body remediation and purification device which comprises a supporting frame, the inner wall of the supporting frame is fixedly connected with a fixing frame at equal angles, the middle of the fixing frame is fixedly connected with a tray, the tray is used for placing aquatic green plants, the bottom of the supporting frame is provided with a gauze element, the outer wall of the supporting frame is fixedly connected with a buoy, and the buoy is fixedly connected with a water outlet of the supporting frame. The utility model relates to the technical field of water body remediation. According to the polluted water body remediation and purification device, the supporting frame and the fixing frame are used in cooperation, aquatic green plants can be conveniently placed, ecological remediation of the water body is achieved, the gauze element arranged at the bottom of the device can effectively intercept impurities in the water body, meanwhile, water and nutrients are allowed to pass through, growth of the aquatic green plants is guaranteed, and the water body remediation and purification device is convenient to use. Due to the design of the buoy, the device can float on the water surface, the position of the device and the connecting mode of the metal chain and the hook can be adjusted conveniently according to actual needs, and the adjacent supporting frames can be flexibly assembled to adapt to water body remediation projects of different scales.

The utility model relates to the technical field of sewage sampling, in particular to a polluted water source sampling device which comprises a device shell, a sewage collecting cavity, a sampling spoon, an instantaneous sampling cavity and a mixed sampling cavity, the mixed sampling cavity is connected with the sewage collecting cavity through a water pipeline; the sampling spoon is arranged in the sewage collecting cavity, a flow guide pipe is arranged at a spoon handle of the sampling spoon, a spoon head and the flow guide pipe are integrally formed, and the sampling spoon is controlled by a motor to rotate to take sewage; a water receiving opening is designed in the wall surface of the instantaneous sampling cavity, a water receiving groove connected with the water receiving opening is designed in the wall surface of the sewage collecting cavity, a small automatic conveying device is arranged in the instantaneous sampling cavity and comprises an annular guide rail, and a plurality of sliding blocks for fixing sampling pipes and a waste water collecting box are arranged on the annular guide rail; and the sliding block is controlled by a sliding seat transmission system. According to the utility model, the technical problem that instantaneous sewage samples at various specific time points cannot be obtained in the time period of mixed sampling is solved.

The present invention discloses a method for removing hexavalent chromium in water based on a light-driven self-diffusion composite material. The self-diffusion composite material is composed of graphene oxide and cuprous oxide with excellent photothermal efficiency. It not only demonstrates light-driven autonomous diffusion capabilities that are different from traditional environmental remediation functional materials, but also exhibits good removal efficiency for hexavalent chromium in water due to the disproportionation reaction of cuprous oxide under acidic conditions. Therefore, the light-driven self-diffusion composite material disclosed in the present invention effectively solves the diffusion requirements of environmental remediation functional materials that require external operations (such as magnetic force or mechanical stirring, etc.); at the same time, the controllable removal of hexavalent chromium pollution in water can be achieved by simply adjusting the pH of the contaminated water.