131results about How to "Efficient decolorization" patented technology

The invention discloses a preparation method and application of a supported metal catalyst. The supported metal catalyst comprises carrier framework materials and nano particles, loaded on the surfaces of the carrier framework materials, of metal or metal oxide, or metal ions chelated on the surfaces of the carrier framework materials, wherein the metal ions and nano particles of the metal or metal oxide are loaded on the surfaces of the carrier framework materials through the polymerization layers, adhered to the surfaces of the carrier framework materials, of catechol derivatives. The preparation method of the supported metal catalyst has the advantages that the method is simple, various carrier framework materials are used, one or more metal ions or nano particles can be loaded, and universality is achieved; the supported metal catalyst is good in active metal dispersity, large in carrier specific surface area, low in use amount, low in cost, and the like; the catalyst loaded with noble metal is catalyst material which is widely used and environmental friendly and is efficiently applicable to environmental chemical engineering fields such as dye wastewater decoloring, wastewater organic pollutant removing, car tail gas treatment, air purification, hydrogenation and reforming catalytic reaction, gas sensors and fuel cells.

A two-photon absorption decolorizable material comprising: a two-photon absorption dye executing a two-photon absorption; and a decolorizable dye having a molar absorption coefficient equal to or less than 100 at a wavelength of a light irradiated at the two-photon absorption, wherein the decolorizable dye is decolorized by an electron transfer or an energy transfer utilizing an excitation energy obtained by the two-photon absorption of the two-photon absorption dye.

The invention relates to a chemical bond connected strong cationic grafted amphoteric chitosan flocculant which is obtained by grafting strong cationic monomers to amphoteric carboxymethyl chitosan in an acidic condition through copolymerization. The chemical bond connected strong cationic grafted amphoteric chitosan flocculant is in such a structure as follows: in the chemical bond connected strong cationic grafted amphoteric chitosan flocculant, degree of substitution of a carboxylic acid group is 5-90%, methylacryloyl oxyethyl trimethyl ammonium chloride is a strong cationic monomer, and polymethylacryloyl oxyethyl trimethyl ammonium chloride accounts for 5-80% by mass of the chemical bond connected strong cationic grafted amphoteric chitosan flocculant. The flocculant provided by the invention has amphoteric characteristics, so that not only is the flocculant property improved, but also the dissolving property is improved. The raw material chitosan is wide in source, natural, non-toxic and degradable. The flocculant has multiple functions of good flocculation effect, metal ion absorption, bacteriostasis, deodorization, decoloration, and effective reduction of COD (Chemical Oxygen Demand) value and the like.

The invention discloses a preparation method of grafted amphoteric starch flocculants, which is implemented by carrying out graft copolymerization on cationic starches, acrylamide and an acrylic acid so as to obtain a grafted amphoteric starch flocculant, and the grafted amphoteric starch flocculant has the following structure shown in the abstract. The method disclosed by the invention has the following advantages that because a molecular chain is rich in anion-cation groups and has amphoteric characteristics, not only is the flocculation property of materials improved, and also the dissolving property of starches is improved; high polymer materials are wide in resource and low in cost, so that the grafted amphoteric starch flocculant has a high performance price ratio; starches have biodegradability and are non-toxic, so that starches do not produce secondary pollution to water bodies; the grafted amphoteric starch flocculant has various good effects such as flocculation, metal ion adsorption, bacteriostasis, deodorization, decoloring, and capability of effectively reducing the COD value; the grafted amphoteric starch flocculant has a characteristic of high efficiency, and is low in putting amount, and the putting amount is generally 0.1-10mg / L; and the the grafted amphoteric starch flocculant is suitable for treating water bodies with different charges, good in salt resistance and wide in applied pH range, and can be applied when the pH value is 1-12.

The invention discloses a composite powered calcium sulfate sewage treatment agent and a method for preparing the same. The sewage treatment agent comprises the following materials in weight portion: 5 to 10 portions of tartaric acid, 3 to 5 portions of malic acid, 60 to 70 portions of calcium sulfate, 10 to 15 portions of magnesium carbonate, 10 to 20 positions of calcium carbonate, 10 to 20 portions of ferric chloride, 10 to 20 portions of calcium oxide and 2 to 3 portions of polyacrylamide. The method is to mix the materials. Compared with the prior art, the sewage treatment agent and the method have the advantages of multifunction, high efficiency, environment protection, quick sewage treatment speed, short treatment time, broad-spectrum and high-efficiency removal of various pollutants and harmful substances and strong adaptively to the sewage muddiness, wide pH value range and wide water temperature change of the sewage. The sewage treatment agent and the method have high alkalization degree, small corrosion, convenient production and no pollution in the production process, simple product package, convenient transportation and low composite cost.

The invention discloses a hydrolysis graft strengthened anionic carboxymethyl cellulose flocculating agent. The hydrolysis graft strengthened anionic carboxymethyl cellulose flocculating agent is characterized by being obtained by carrying out hydrolysis reaction onto graft carboxymethyl cellulose under alkali condition, wherein the hydrolysis graft strengthened anionic carboxymethyl cellulose flocculating agent has the structure shown in the specification; the mass of polyacrylamide is 5%-65% of that of the hydrolysis graft strengthened anionic carboxymethyl cellulose flocculating agent; and the mass of the polyacrylic acid is 5%-70% of the that of the hydrolysis graft strengthened anionic carboxymethyl cellulose flocculating agent. The hydrolysis graft strengthened anionic carboxymethyl cellulose flocculating agent disclosed by the invention has the triple characteristic of carboxymethyl anionic group, polyacrylamide and polyacrylic acid. Moreover, the carboxymethyl anionic group, polyacrylamide and polyacrylic acid are linked by chemical bonds, so that the molecular weight of carboxymethyl cellulose is improved and the bonding and bridging flocculation is enhanced. Besides, the soluble pH range of the hydrolysis graft strengthened anionic carboxymethyl cellulose flocculating agent is expanded due to the existence of the grafting chain, and therefore, the pH sensitivity of the flocculation effect of carboxymethyl cellulose is effectively restrained.

The invention discloses straw modified into a strong cation type absorbent. The straw is characterized in that the straw and 3-chlorine-2-hydroxypropyl trimethylammonium chloride, and 2-hydroxypropyl trimethylammonium chloride is grafted on a cellulose molecular chain or a lignin molecular chain of the straw. The main raw material of the straw modified into the strong cation type absorbent is the crop waste which is abundant in sources, namely straw, the cost is low, and the straw is suitable for large industrialized production, is a natural high polymer material, has the characteristic of environmental friendliness, and is a water treatment agent which is economical and high in quality. The invention discloses the preparation method of the straw modified into the strong cation type absorbent.

The invention discloses a chitosan-grafting amino acid magnetic composite microsphere. The microsphere is provided with a core-shell structure, a chitosan-amino acid composite is used as a shell, and a magnetic material is used as a core; the composite is obtained in a grafting method of chitosan and amino acid; the amino acid is one of glutamine, glutamic acid and ornithine; the content of the amino acid in the composite is 5 to 80 percent by weight; the magnetic material is Fe or Fe3O4, and the magnetic material accounts for 10 to 20 percent of the total weight of the chitosan and amino acid. The chitosan-grafting amino acid magnetic composite microsphere can be used as a water treating agent, harmful substances (such as dyestuff substances and metal ions) in water can be effectively eliminated, various functions such as good flocculation, metal ion adsorption, deodorization, decoloration and effective reduction of COD value can be realized, the functions can be completed in a short time, and the application efficiency of the material can be improved. The chitosan-grafting amino acid magnetic composite microsphere has given universality and is applicable to waste water in dyeing enterprises, electroplating enterprises and the like.

The invention discloses a composite flocculating agent and a preparation method thereof. The composite flocculating agent is a chitosan-hydrolyzed polyacrylamide composite flocculating agent. The preparation method comprises the following steps of: 1, fully dissolving chitosan in acid aqueous solution to obtain chitosan-containing solution; 2, adding a cerium ammonirm nitrate or ammonium persulfate initiator into chitosan solution obtained in the step 1, adding acrylamide and reacting at the temperature of between 45 and 65 DEG C for 1 to 4 hours so as to obtain a chitosan grafted polyacrylamide material; and 3, adding isopropanol into solution of chitosan grafted polyacrylamide obtained in the step 2, adding aqueous solution of sodium hydroxide (NaOH) and reacting at the temperature of between 55 and 80 DEG C for 0.5 to 4 hours so as to obtain the chitosan-hydrolyzed polyacrylamide composite flocculating agent.

The invention discloses a method for rapidly reducing the chromaticity of printing and dyeing wastewater by utilizing white rot fungi. First, the film is hung, and after the biofilm is mature, the whole reactor officially enters the operation stage, and 1 L of printing and dyeing wastewater is added, so as to realize the color change of the printing and dyeing wastewater. degree reduction operation. The treatment method of the invention can completely degrade various synthetic dyes into CO2 and H2O, also has good effect on decolorization of dye wastewater, and is of great significance to environmental protection and sustainable development in my country.

The invention discloses an Electro-Fenton wastewater treatment system based on arrayed wetland microbial fuel cell powering and a wastewater treatment method. The system comprises: a nano iron-carbon micro-electrolytic reaction region for pretreating wastewater; an Electro-Fenton system reaction region for treating effluent from the nano iron-carbon micro-electrolytic reaction region; arrayed wetland microbial fuel cells for treating effluent from the Electro-Fenton system reaction region and treating the effluent, wherein the arrayed wetland microbial fuel cells refer to a wetland microbial fuel cell bank formed by connecting a plurality of wetland microbial fuel cells; cathode and anode of the wetland microbial fuel cell bank are connected to corresponding anode and cathode of the Electro-Fenton system reaction region through wires respectively. The invention also provides the wastewater treatment method. The joint action of the whole system brings enhanced degrading action with no need for additional energy or fed reagents, and the method is an energy-saving environment-friendly water treatment technique.

The invention discloses a preparation method for chitosan modified algae removal flocculant. The preparation method comprises the following steps: preparing N-malely chitosan, mixing with acrylamide monomer and dimethyl diallyl ammonium chloride, dissolving in water, adding a photoinitiator into a mixed solution under protection of nitrogen gas, triggering polymerization reaction through ultraviolet irradiation, and standing and curing to obtain the algae removal flocculant. The chitosan modified algae removal flocculant prepared by the preparation method improves flocculation performance of chitosan, further improves dissolving performance of chitosan, is higher in viscosity coefficient, and can be widely used for algae removal treatment of algae-containing landscape water, river water and lake water. The method is simple to operate, is short in synthesis time; and the used main raw materials are natural high-molecular products from the source, and the preparation method is an economical preparation method for obtaining high-quality algae removal flocculant.

Implements for decolorization, deodorization and deoxidization of used or filtered spent cooking oil are disclosed to improve on the service life of cooking oil and the health aspects of fried foods. This can be achieved on a small to large scale by simple implements filled with a mixture of plant-based granulated activated carbons and antioxidants, wherein the implements can be immersed in a frying appliance, such as a pot, a vat, a pan, a deep fryer and the like, containing used oil or in a storage unit of filtered oil. The overall safety, palatability and economics of a food preparation process are determined by the ease of oil containment and cleanup during and after frying with oil.

The invention relates to a rapid microwave treatment method of dye wastewater. The rapid microwave treatment method comprises the steps of adjusting the pH value of dye wastewater to be 5.0+ / -1, adding nano zero-valent iron according to the mass ratio of 1:(1-4) of dyes in the dye wastewater to nano zero-valent iron, and treating the solid-liquid mixed solution of the dye wastewater and nano zero-valent iron with a microwave field; filtering the solid-liquid mixed solution of the dye wastewater and nano zero-valent iron with a microporous filter membrane after the solid-liquid mixed solution stays in the microwave field for a period of time under the aerobic or anaerobic condition, thus obtaining a decolored water solution. Efficient and rapid decoloration of the dye wastewater is achieved by combining microwaves with nano zero-valent iron and simultaneously utilizing the thermal effects and non-thermal effects of microwaves, the dye degrading efficiency and rate of nano zero-valent iron are greatly increased by introducing the microwave field, and more than 90% of the decoloration efficiency can be obtained within 5 minutes.

The invention relates to a novel sewage treatment agent. The novel sewage treatment agent is prepared from, by weight, 20-30 parts of polyacrylamide, 12-15 parts of polyethylene imine, 20-25 parts of activated carbon, 2-5 parts of titanium dioxide and 5-10 parts of sodium dodecyl sulfate. By controlling and changing the addition sequence of inorganic polymer and organic polymer substances with different functional groups and the conditions under which reactions happen or not happen in the compounding process, good form distribution and stability of the components are kept before the components are added, and very quick form transformation and efficient coagulation and flocculation are achieved after the components are added.

The invention discloses a floating type suction and cavitation combined ozone water treatment device and belongs to the field of sewage treatment. The floating type suction and cavitation combined ozone water treatment device comprises a calibration gauge, a water taking pipe, a flap valve, an ozone generation device, a gas flow meter, a liquid stop valve, an ozone introduction pipe, a suction and cavitation combined ozone reaction region, a water pump, a liquid flow meter, a water outlet pipe, a shower nozzle, an outlet water remaining box and a carrier, wherein the suction and cavitation combined ozone reaction region comprises a cavitation generator, an equal-diameter cavitation section and an observation chamber. According to the floating type suction and cavitation combined ozone water treatment device disclosed by the invention, algae water with different depths in different water regions can be treated, so that sewage is mixed with ozone after the sewage generates a hydraulic cavitation effect; and the efficiency of sewage treatment is greatly improved, and the utilization rate of the ozone is greatly increased.

The invention provides a treatment method of dyestuff wastewater. The treatment method comprises the following steps: firstly, carrying out homogenization treatment on the dyestuff wastewater so as tobalance the water quality of the dyestuff wastewater from different procedures; then carrying out anaerobic treatment on the homogenized dyestuff wastewater; carrying out the anaerobic treatment to remove a lot of COD (Chemical Oxygen Demand) and SS (Suspended Solids) in the dyestuff wastewater; finally, carrying out anaerobic-aerobic circulating treatment on the dyestuff wastewater subjected tothe anaerobic treatment in a membrane bioreactor. According to the treatment method, the membrane bioreactor is filled with a hollow fiber membrane containing quinonyl and the quinonyl is used as an electronic vector and can be used for accelerating enzyme-catalyzed reaction of dyestuff de-coloring in an anaerobic process, so that the aim of efficiently de-coloring is realized; in an aerobic treatment process, the COD and the SS in the wastewater are further removed, so that output water reaches first-grade emission standards. An embodiment result shows that the method provided by the invention is used for treating the dyestuff wastewater; the COD content in the output water is less than 100mg / L, the chroma is less than 20 times and the content of the suspended solids (SS) is 0.

The invention discloses an industrial wastewater decoloring treatment process. The process comprises the following steps: the pH value of wastewater is adjusted, an adsorption and oxidation reactor filled with adsorption resin is introduced, a lot of chormophoric organics are adsorbed in the resin, when the chroma removal rate is less than 60%, drainage is performed, a liquid-phase oxidant is added in the adsorption resin to perform oxidative decoloration, the resin is activated and regenerated; and after the pH value of the discharged water of the adsorption and oxidation reactor is adjusted, the discharged water enters a catalytic oxidation reactor, the adsorption resin loaded with a transition metal catalyst is filled in the reactor, and the liquid-phase oxidant is added to perform heterogeneous catalytic oxidation decoloration and remove the small molecules and nonpolar chormophoric organics which are difficult to be adsorbed by the adsorption and oxidation unit. By adopting the method, the polar and nonpolar chormophoric organics with wide molecular weight range can be removed and the effects of efficient decoloring and wide applications can be achieved.

The invention relates to a technique for preparing a fugui ostealgia compound by a microorganism fermentation method, comprising the following steps: all medicinal material are weighed according to the proportion of the fugui ostealgia compound, sterilized after being soaked by distilled water, inoculated with aspergillus niger and continuously cultured, the fermented medicinal materials are heated, circulated, extracted and filtered to obtain an extracting solution, and the extracting solution is centrifuged, concentrated and kept constant volume. The fugui ostealgia compound prepared according to the technique improves the curative effect of the medicine, lowers the toxic or side effect of the medicine, has low cost and is suitable for large-scale production.

A process for treating the alkaline printing-dyeing sewage features that the inorganic Mg salt and inorganic ferrous salt are proportionally added to said sewage for flocculating reaction.

The invention discloses a primary physicochemical enhanced treatment coagulant for chemical waste water and relates to the technical field of chemical waste water treatment. The coagulant is prepared from, by weight, 10 kg to 18 kg of ferric sulfate, 8 kg to 12 kg of aluminum polysilicate, 4 kg to 9 kg of sodium lignosulfonate, 3 kg to 7 kg of carbon nanotubes, 5 kg to 8 kg of nano-zinc oxide, 3 kg to 6 kg of activated carbon fiber, 2 kg to 5 kg of polyvinyl alcohol, 2 kg to 5 kg of organic montmorillonite, 3 kg to 8 kg of phenolic resin, 1 kg to 4 kg of rapeseed oil, 1.5 kg to 3 kg of gas carbon black, 0.5 kg to 2 kg of propolis, 2 kg to 5 kg of calcium stearate and 8 kg to 12 kg of iron powder. According to the coagulant, chemical waste water is treated jointly by the carbon nanotubes, the nano-zinc oxide, the activated carbon fiber and other physicochemical reagents, the treatment speed is high, COD and BOD of the waste water can be effectively reduced, and organic matter in the waste water can be effectively removed.

The invention discloses a photocatalyst and a preparation method and an application thereof. The photocatalyst is a mesoporous zeolite material loaded with iron ions, and the iron ions lie in the skeleton position and / or mesoporous channels of the mesoporous zeolite. The photocatalyst is prepared by using ion exchange method or insitu doping method to load the iron ions in the skeleton and / or the mesoporous channels of the mesoporous zeolite. The photocatalyst provided by the invention can efficiently decolor, degrade and mineralize organic dyes in ultraviolet lights, and can efficiently decolor, degrade and mineralize organic dyes in visible lights, thus the photocatalyst has strong applicability and has important meaning in practical application. In addition, the photocatalyst has good stability, can be recycled, and can be prepared and processed simply and practicably, thus the waste water treatment cost can be greatly reduced, the industrial requirements of scale and economy of the waste water treatment are satisfied, and the photocatalyst has significant effect and application values.

The invention relates to a graphene water purifying filter element and a water purifier. The water purifying filter element comprises a first-level graphene PP cotton composite filter element, a second-level graphene modified activated carbon composite filter element, and a third-level graphene modified activated carbon composite filter element which are sequentially connected. The water purifierprepared by adopting the water purifying filter element has better effects on filtering and removing various impurities, rusts, bacteria and organic matters. The bacteria in the tap water are effectively removed without increasing content of nitrate and heavy metal ingredients in the water. The graphene water purifying filter element has the characteristics of being high in efficiency, convenientto use, and low in cost and raw material consumption. The contents of the beneficial elements in the water treated through the water purifying filter element are on the same level with the contents ofthe beneficial elements in the tap water, the PH value of the filtered water reaches 7.40 and is much closer to the optimal PH value of the drinking water of human beings, and the filtered water is more suitable for drinking directly.

The invention discloses a decoloring method of 1,3,6-hexane trinitrile. The decoloring method comprises the following steps: S1, pretreatment of the 1,3,6-hexane trinitrile; S2, pretreatment of activated carbon; S3, decoloring treatment; and S4, concentration and drying, so that 1,3,6-hexane trinitrile with low colourity and low free acid content is obtained. The invention provides a high-efficiency 1,3,6-hexane trinitrile decoloring method capable of reducing the free acid content; and the decoloring method has simple processing steps, and has popularization and application values.

The invention discloses a full-strength cationic grafted natural polymer sludge conditioner and a preparation method thereof. The full-strength cationic grafting natural polymer sludge conditioner is such a full-strength cationic grafting natural polymer sludge conditioner that is obtained by obtaining a main chain cationic natural polymer by etherification modification and then subjecting the main chain cationic natural polymer to graft strong cationic monomer copolymerization, and has the structural formula as shown in formula (II): the formula is shown in the description. In the full-strength cationic grafted natural polymer sludge conditioner, the degree of substitution of the main chain quaternary ammonium group is 5% to 90%. The sludge conditioner of the invention has good dewatering effect, not only improves the sludge dewatering performance, but also improves dissolution performance; raw materials cellulose and starch are wide in source, natural non-toxic and degradable, and has various functions such as good sludge dewatering, flocculation, metal ion adsorption, bacteriostatic action, deodorization, decolorization and capability of effective reduction of COD values.

The invention provides a wastewater treatment agent and application of the wastewater treatment agent. The wastewater treatment agent mainly is prepared from the following ingredients in parts by weight: 12 to 20 parts by weight of chitosan, 5 to 15 parts by weight of ferric chloride, 35 to 55 parts by weight of active carbon and 10 to 20 parts by weight of aluminum sulfate. The wastewater treatment agent has the advantages that when the wastewater treatment agent is applied to wastewater treatment, and the adding quantity is 200mg / L, the wastewater turbidity removal rate can reach more than 95 percent; the total phosphorus removal rate can reach more than 90 percent; the COD removal rate can reach more than 33 percent; the BOD removal rate can reach more than 78 percent; in addition, the raw material resources of the wastewater treatment agent are rich; the cost is low; a better market application prospect is realized.

The invention provides a preparation method and a dye degrading method of calcium alginate coated zero-valent iron. According to the preparation method, sodium alginate serves as a substrate, the sodium alginate, calcium ions and iron ions are coordinated in a cross-linking manner to obtain calcium alginate coated iron ion gel balls, and calcium alginate coated zero-valent iron gel balls are prepared by the aid of a potassium borohydride liquid phase reduction method. According to the dye degrading method, reduction technique of the zero-valent iron and Fenton reaction are jointly used for pollutant reduction and oxidative degradation. Targeted pollutants are thoroughly removed by the aid of a pollutant control technique.

A printing apparatus comprises an ink-jet head which discharges an ink toward a medium, a UV light source, a movement mechanism which moves the medium, and a controller. When the printing mode is selected, the controller controls the ink-jet head to discharge the ink toward the medium, and the controller controls the UV light source to radiate a small amount of the ultraviolet light to cure the ink. When the erasing mode is selected, the controller controls the UV light source to radiate a large amount of the ultraviolet light toward the medium to decolorize the ink. Accordingly, the medium, on which the printing has been once performed, can be reused quickly and reliably. Further, the printing can be performed on a variety of media.