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 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 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.

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 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 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.

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 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.

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.