269 results about "Inorganic pollutants" patented technology

The invention discloses a method for preparing a herbal biological fiber and biological paper pulp, and the used microbial composite agent and a preparation method thereof. The biological fiber is prepared through pretreatment of a herbal raw material, biological degumming fermentation, and subsequent mechanical treatment of a fermentation product. The composite agent comprises degumming bacteria, nutrition bacteria and decolorizing bacteria, and various strains are synergistic without antagonistic reaction. In the method for preparing the biological fiber and the biological paper pulp, a chemical additive is not needed at all, but the high-cellulose and hemicellulose biological fiber and the biological paper pulp can be industrially produced; decolorization is complete, and the produced biological fiber and biological paper pulp have white color; a bleaching process is avoided, so investment in decolorizing production equipment is saved, and fiber extracting and pulping investment cost can be effectively reduced; in addition, waste gas and waste water are not generated in the fiber extracting and pulping process, inorganic pollutants are not generated, waste water and waste residues produced in each process step can be produced and converted into a biological fertilizer, and water is recycled.

A portable, refillable water dispenser serving batches of water purified of organic and inorganic pollutants includes a portable, refillable and hand-holdable vessel for holding and pouring water having a spout and, inside the portable, refillable and hand-holdable vessel, moving water and still water processing module cooperative to remove inorganic and organic pollutants from water received batchwise by the vessel.

The invention relates to a membrane cleaning agent for polyacrylamide on a reverse osmosis membrane. Acid chemical cleaning agents and alkaline chemical cleaning agents are prepared in the membrane cleaning agent, and the polyacrylamide and organic and inorganic pollutants wrapped by the polyacrylamide on the surface of the polluted reverse osmosis membrane are dissolved, dispersed, peeled and removed specifically. The membrane cleaning agent has the advantages of being easy to prepare and capable of recovering water producing flux and causing on damage to elements of the reverse osmosis membrane, and raw material can be achieved conveniently.

The invention discloses an ultrafiltration membrane chemical cleaning method and aims at an ultrafiltration membrane that is used for processing purified PTA waste water. The invention uses an acid lotion prepared by citric acid and sodium bisulfite for dissolving and eluting inorganic pollutants that are formed by cobalt and manganese ion hydroxide, deposited and absorbed on the surface of the ultrafiltration membrane, and uses an alkaline oxidative lotion that contains sodium hypochlorite for dissolving and eluting organic colloid pollutants that are deposited and absorbed on the surface of the ultrafiltration membrane. The ultrafiltration membrane chemical cleaning method can effectively elute the pollutants, recover the running flux and running pressure of the ultrafiltration membrane, and ensure stable running of the purified PTA waste water in an ultrafiltration process.

The invention relates to a chemical cleaning method of a reverse osmosis membrane. In the method, aiming at a reverse osmosis membrane for processing PTA refining wastewater, inorganic pollutants which are formed by cobalt ions, manganese ions, hydroxide thereof and the like and are deposited and adsorbed on the surface of the membrane are dissolved and eluted by using acid rinse prepared by citric acid and sodium bisulfite; organic colloid pollutants deposited and adsorbed on the surface of the membrane are dissolved and eluted by using alkaline rinse containing sodium dodecyl benzene sulfonate and sodium hydroxide. The method can elute the pollutants on the surface effectively, restore operating flux, operating pressure and desalination rate of the reverse osmosis membrane, and ensure that the process of processing the reverse osmosis membrane for the PTA refining wastewater is stable in operation.

The invention relates to a waste water treatment system of ultraviolet light and ozone micro/nanobubbles, which comprises a raw water lifting pump, a reaction tank, an ultraviolet lamp casing pipe group, a micro/nanobubble generator and an ozone generator. The water inlet of the reaction tank is positioned at the upper part of the water inlet end of the reaction tank; a water outlet overflow weir is arranged at the upper part of the water outlet end of the reaction tank; the ultraviolet lamp casing pipe group is hung on an upper cover of the reaction tank; the water outlet overflow weir is respectively communicated with a water outlet valve of the reaction tank and the water inlet of the micro/nanobubble generator; the air inlet of the micro/nanobubble generator is connected with the ozone generator; and the micro/nanobubble generator leads produced air-water mixture into the reaction tank. The waste water treatment system adopts ultraviolet light and ozone micro/nanobubbles, improves the mass transfer performance of ozone, greatly improves the utilization rate of ozone, and reduces the output of tail gas. The particle size of ozone micro/nanobubble is small, the quantity of the ozone micro/nanobubbles is large, the retention time of the ozone micro/nanobubbles is long, and the ozone micro/nanobubbles can scrub the surface of an ultraviolet lamp casing pipe while being spread in water to prevent the adhesion or scaling of organic or inorganic pollutant.

The invention relates to a magnetic separation type composite adsorbing material which is prepared from nano Fe3O4 and active carbon fiber. The ferriferous oxide nano composition fiber material is synthesized by using conventional organic solvent as the reaction medium under the control of a simple low temperature solvent thermal system. The magnetic separation type composite adsorbing material can be used as a magnetic separation type adsorbing material for adsorbing organic or inorganic pollutants to purify waste water.

A portable, refillable water dispenser serving batches of water purified of organic and inorganic pollutants includes a portable, refillable and hand-holdable vessel for holding and pouring water having a spout and, inside the portable, refillable and hand-holdable vessel, moving water and still water processing module cooperative to remove inorganic and organic pollutants from water received batchwise by the vessel.

A fluid cleaning medium for removing chlorine, organic and inorganic pollutants, heavy metals, ions, particles and bacteria from fluid is composed of a pre-filtering layer, an immobilized layer and an adsorptive filter layer. It features large effective area, low pressure loss and compact structure. Its preparing process is also disclosed.

The invention provides a method for cleaning pollutants on the surface of a silicon carbide wafer. The cleaning process comprises two parts, namely an organic cleaning process and an inorganic cleaning process. The organic cleaning process comprises the step of removing waxiness adhered to the surface and other partial organic pollutants on the surface. The inorganic cleaning process comprises the step of removing residual organic pollutants and other strong-adsorptivity substances on the surface of the silicon carbide wafer through oxygenization and removing an oxide layer, and removing inorganic pollutants on the surface through acid-washing. By the cleaning process, pollutants and particles on the surface can be removed to the greatest extent and the instant utilization efficiency of the silicon carbide wafer is greatly improved.

The invention discloses an electrochemical device for treating pollution caused by organic matters and inorganic matters in soil and underground water and an application thereof. The device is characterized by being a control circuit which consists of a power supply, a control pivot and an electrode pack or electrodes, which are sequentially connected in series through leads, wherein the electrode pack or the electrodes are embedded into a pollution medium, and a conductive ionic catalytic liquid is added into the pollution medium; the control pivot receiving current output by the power supply adjusts output to the electrode pack or the electrodes so as to control the voltage, the polarity and/or the current direction of the electrode pack or the electrodes. The device disclosed by the invention can effectively promote degradation of pollutants in soil and underground water and improve the degradation efficiency of the pollutants without secondary pollution, so that the purpose of repairing soil is realized by treating organic and inorganic pollutants in soil and underground water.

The invention discloses a method for preparing sintering-free cement from municipal solid waste, which comprises the following steps: respectively weighing aluminum ash, diatomite and municipal solidwaste incineration fly ash, and mixing to obtain modified fly ash; respectively weighing sodium phosphate and the modified fly ash, and mixing to obtain alkali-doped modified fly ash; respectively weighing water and the alkali-doped modified fly ash, stirring, Meanwhile, carrying out low-temperature plasma irradiation, so as to obtain water-boiling-free mud slurry; and drying, grinding and sievingthe water-boiling-free mud to obtain the sintering-free cement prepared from the municipal solid waste. The invention also discloses the sintering-free cement prepared by the method. The minimum leaching values of Zn and Pb of the prepared sintering-free cement are far lower than the limit values of inorganic pollutants Zn and Pb in the Holland building material standard, and the content of dioxin is far lower than the limit values in the Household Refuse Landfill Pollution Control Standard (GB16889-2008).

A multifunctional air purifier with functions of oxygen supplement and carbon dioxide comprises six function modules. The air purification module is used for killing bacteria and viruses and degrading various pollutants such as formaldehyde and benzene by high-energy positive oxygen ions generated by an ionization tube; high-energy negative oxygen ions can clear various suspended particles in air, such as PM2.5. The chemical oxygen production module supplements oxygen by using calcium peroxide and the like as oxygen producing agent. The CO2 absorption and PM2.5 removal module is capable of removing inorganic pollutants such as carbon dioxide and various suspended particles in air, including PM2.5, by calcium hydroxide and water in oxygen production waste liquid. The vehicular power module provides three USB interfaces and a standard power interface (+5V/500mA). The harmful gas alarm module has the function of warning on over-standard density of carbon monoxide, methylbenzene, ammonia and the like. The electronic control module is used for controlling ordered operation of a whole system.

The invention relates to a modified titanium-bearing blast furnace slag catalyst with visible photocatalytic activity and a preparation method thereof, which belong to the field of material science. The compositions of crystal phase of the catalyst are 33 to 40 weight percent of perovskite, 50 to 59 weight percent of diopside and 7 to 10 weight percent of akermanite-submellite; and the specific surface area is between 9.7 and 20.5 square meters pre gram, and the maximum absorption capacity is between 3.9 and 8.3 milligrams per gram. The preparation method comprises the following steps: firstly, titanium-bearing blast furnace slag is crushed, and titanium-bearing blast furnace slag powder is obtained; secondly, ammonium sulfate is mixed with the titanium-bearing blast furnace slag powder; thirdly, mixture of the titanium-bearing blast furnace slag powder and the ammonium sulfate is grinded; and fourthly, the mixture is roasted for 1 to 4 hours at a temperature of between 300 and 700 DEG C, and is cooled to the room temperature. The STBBFS catalyst prepared by the method has strong photoabsorption and photoresponse when excited by visible light, so that the photocatalyst which is prepared by adoption of the titanium-bearing blast furnace slag as a raw material can utilize visible light sources such as sunlight to effectively photodegrade organic pollutant and inorganic pollutant in the water, and has high energy conversion efficiency.

The invention provides a biological carbon/graphene composite used for adsorbing organic/inorganic pollutant in a water body and a preparation method, and discloses the biological carbon/graphene composite easy and convenient to use and the preparation method. The biological carbon/graphene composite is used for adsorbing organic/inorganic pollutant in the water body. According to the technical scheme, biomass raw materials are directly processed through graphene suspension, anaerobic pyrolysis is conducted for 1 h under the condition of 600 DEG C in a tubular furnace after the mixture of the graphene suspension and the biomass raw materials is dried so that graphene can wrap the surfaces of biological carbon through pi-pi bonds, the biological carbon/graphene composite is endowed with a larger specific area and more functional groups through the outer layers of graphene, and therefore the removal effect of the biological carbon/graphene composite for phenanthrene and mercury (II) in water is remarkably improved. The biological carbon/graphene composite and the preparation method have the advantages that the process is simple, the effect is table, the application range is wide, the composite is friendly to the environment, and no secondary pollution is caused; the biological carbon/graphene composite and the preparation method have wide application prospects on the aspect of repairing organic/inorganic pollution in the water body.

The invention discloses a method for synchronously achieving incineration fly ash detoxification and chromium slag reduction curing. The method includes the following steps that (1), incineration flyash and tuff are weighed, mixed to be uniform and ground, and gelatinized powder is obtained; (2), sodium hydroxide and sodium silicate are weighed, mixed to be uniform and ground, and an alkali activator is obtained; (3), sodium persulfate and sodium oxalate are weighed, mixed to be uniform and ground, and a reductive detoxification inducer is obtained; (4), chromium slag, the gelatinized powder,the alkali activator and the reductive detoxification inducer are weighed, mixed to be uniform and ground, and fly ash and chromium slag powder is obtained; (5), the fly ash and chromium slag powderis weighed and dissolved in water, the materials are mixed to be uniform, and fly ash and chromium slag slurry is obtained; (6), the fly ash and chromium slag slurry is sealed, activated through microwaves, cooled and put in a die to be cured. The leaching concentrations of multiple heavy metals and dioxin in the fly ash and a chromium heavy metal in the chromium slag are all lower than the entrance limiting value of a municipal solid waste landfill. Treated cured bodies have high acid resistance and high constraint capacity for heavy metal inorganic pollutants and organic pollutants.

The invention relates to a haze-preventing helmet with a nanoscale titanium dioxide photocatalytic net micro air purifier, and belongs to the technical field of new energy labor protection article air purifying. Polluted air blowing to the face of a rider riding an electric bicycle moving forward in haze air is filtered through an activated carbon filter screen and enters an air inlet pipe due to the fact that an electric fan increases the air inlet speed, a lithium ion battery supplies power to an LED ultraviolet lamp arranged on an LED ultraviolet lamp support, light rays emitted by the LED ultraviolet lamp radiate nanoscale titanium dioxide in a nanoscale titanium dioxide photocatalytic net, the capacity of semiconductor photocatalytic nanoscale titanium dioxide in the aspect of absorbing and degrading organic pollutants and inorganic pollutants is improved, by the combination of the medical grade HEPA filtering screen, nano silver ion antibacterial coating and the nano atmosphere purifying coating technology, the polluted air input from an air inlet is purified into clean air, the clean air is supplied to the rider riding the electric bicycle through a clean air supplying pipe, and health of every part of the head of the rider is guaranteed.

Relating to the field of water treatment materials, the invention specifically relates to a red mud coated adsorption material for removing inorganic pollutants and a preparation method thereof. Red mud is adopted as the absorptive active component and a hard material is employed as the carrier. The surface of the hard material is coated with the absorptive active component red mud through a particular proportioned binder. After drying and washing of the coated material, a red mud coated adsorption material for removing phosphor and heavy metals can be obtained. With simple operation, the preparation process of the invention is suitable for on-site preparation and usage. With the industrial slag waste red mud as the raw material, the adsorption material provided in the invention can have a low price. As the raw material red mud adopted in the invention is rich in a plurality of absorptive active components of metallic oxides, so the application of the red mud coated adsorption material provided in the invention to remove inorganic pollutants can achieve efficient removing effect.

A method in treating aqueous feedstream in diverse plant site environments is disclosed for improving filter flux rates, cleaning filter media and prolonging useful operative life of media. In preferred embodiments the method is provided with steps for contacting, reacting, pressurizing and equalizing ozone and feedstream within a central area or multiple areas and sustaining high pressure throughout the system to achieve qualitatively and quantitatively improved permeate products, and reject for recycle. The method and system provide an improved cleaning and processing system characterized by an ozone-concentrated, homogeneous single phase liquid conversion of a generated ozone gas mixture and a feedstream source containing organic and inorganic pollutants. The method improves and monitors ozone oxidizing power and reflecting ORP values, and provides further media cleaning and improved oxidation reactions for attack on pollutants on each cycle/recycle operation.

The invention relates to a preparation method and application of a magnetic dual-network kation hydrogel-based composite adsorbing material aiming at anion pollutants in water. The adsorbing materialincludes kation hydrogel, calcium alginate, magnetic matter and multi-element hydrated oxidation state active metal components. The preparation process of the adsorbing material involves the free radical polymerization effect between trimethyl ammonium chloride and methylene bisacrylamide, the electrostatic effect of Ca2+ and alginic acid, dispersed doping of the magnetic matter and in-situ loading of the active metal components, and the adsorbing material has high surface positive charge and exclusive adsorption potential, and can efficiently and rapidly adsorb inorganic pollutants such as PO43-, NO3-, F- and AsO43- and organic pollutants such as anion dye away. The adsorbing material is good in chemical stability, good in mechanical performance, wide in pH value range, high in ion interference resistance, low in ion dissolving-out amount and free of secondary pollution, and has good application potential, and magnetic field separation and repeated regeneration are easy.

A process for wastewater treatment, comprising aerating and mixing wastewater containing organic and/or inorganic pollutants and bentonite clay in a vessel at a first temperature and for a time sufficient to reduce the concentration of said pollutants, raising the temperature of said mixture to at least 100° C. to evaporate water vapor, passing said water vapor through a fritted membrane and into a condenser, and collecting condensed water.