390 results about "Congo red" patented technology

The invention discloses a preparation method for an adsorbent for treating dye wastewater, and particularly discloses a preparation method for a biomass adsorbent for treating anionic dye wastewater. The adsorbent is prepared by pretreating sugarcane bagasse, performing alkali activation and oxidization treatment, and then grafting a hyperbranched polyamidoamine polymer. The preparation method comprises the following steps: (1) performing pretreatment, alkali activation and oxidization treatment on sugarcane bagasse fiber; (2) grafting the oxidized sugarcane bagasse fiber with the hyperbranched polyamidoamine to obtain the polyamino-modified sugarcane bagasse-based adsorbent. The prepared adsorbent has the characteristics of being good in stability, good in adsorption effect, wide in application range and the like, and can be used for treating the anionic dye wastewater. Taking Congo red dye wastewater for example, the Congo red adsorption capacity and adsorption efficiency of the adsorbent respectively achieve 240mg/g and 97%. The prepared adsorbent is wide in raw material source, low in price and easily available, low in cost, convenient to operate when being applied to wastewater treatment, and simple in technology.

The invention belongs to the technical field of metal organic framework materials, and discloses a zinc and copper bi-metal organic framework material and a preparation method and application thereof. The preparation method comprises the steps that 1, soluble copper salt, soluble zinc salt and trimesic acid are added to mixed solvent of N,N'-dimethyl formamide, water and ethyl alcohol, even stirring and ultrasonic treatment are conducted, and reaction liquid is obtained; 2, the reaction liquid obtained in the first step is transferred into a polytef reaction kettle for a hydrothermal reaction, and a roughly prepared zinc and copper bi-metal organic framework material is obtained; 3, the material obtained in the second step is washed through the N,N'-dimethyl formamide firstly and then soaked through ethyl alcohol solvent, and the purified zinc and copper bi-metal organic framework material is obtained after activation is conducted. According to the zinc and copper bi-metal organic framework material, the framework structure of an original copper-based organic material is reserved; meanwhile, the prepared material is large in specific surface and developed in micro-pore structure and has higher adsorption capacity to low-concentration congo red dye molecules in water.

The invention discloses a preparation method of a magnetic chitosan/cationic surface active agent modified zeolite adsorbent, which comprises preparing the magnetic chitosan/zeolite with ferroferric oxide, the zeolite and the chitosan serving as raw materials; mixing the magnetic chitosan/zeolite with cationic surface active agent solution; and obtaining the magnetic chitosan/cationic surface active agent modified zeolite adsorbent through constant-temperature water-bath oscillation. The prepared adsorbent can be applied to removing organic pollutants such as humic acid and congo red in water and removing heavy metal pollutants such as copper ions. Efficient utilization of cheap natural resources is achieved. The prepared product is suitable for removing soluble organic pollutants in drinking water, anionic dye in printing and dyeing wastewater and the heavy metal pollutants such as the copper ions, and has the advantages of high utilization rate, good separation effect, low price and the like.

The invention discloses a composite membrane modified biosensor and preparation and application thereof. The biosensor comprises a matrix electrode, the induction end of the matrix electrode is wrapped with an aromatic diamine polymer membrane, a carbon nano tube-Congo red combination layer is modified on the membrane, and a nano gold particle layer is adsorbed on the combination layer. The preparation method comprises the following steps of: forming the polymer membrane at the induction end of the matrix electrode by electric polymerization reaction; and modifying the carbon nano tube-Congo red combination layer on the membrane, and finally electrically depositing nano gold on the combination layer. The biosensor can be applied in detecting target genes; and during detecting, a probe is first designed, then a capture probe is modified, and whether the target genes are contained in hybridization solution to be detected and the concentration of the target genes can be judged by first and second hybridization and enzyme catalytic reaction. The biosensor has the advantages of good electric conductivity, good biocompatibility, high sensitivity, storing anti-interference performance, good selectivity, low manufacturing cost and the like.

The invention discloses a preparation method and application of an adsorbent of an organic and inorganic composite material. The preparation method for the adsorbent of the organic and inorganic composite material comprises the following specific steps of: putting zeolite into a reactor containing distilled water and stirring until the zeolite is in a suspension state; fully mixing a chitosan solution with the zeolite in the suspension state; dropping a sodium hydroxide solution into the reaction liquid, centrifugally separating, and washing solid until the pH value of the supernatant is close to 7.0; drying the solid; mixing the solid with a cationic surface active agent; and putting the reaction system into a constant-temperature water bath vibrator for reaction, to obtain the cationic surface active agent modified chitosan loaded zeolite adsorbent. The adsorbent prepared with the preparation method disclosed by the invention is applicable to removing organic pollutants such as humic acid, congo red and the like from water so that cheap natural resources can be efficiently utilized, the prepared product is suitable for removing soluble organic pollutants from drinking water and removing anionic dye from printing and dyeing waste water, and the adsorbent of the organic and inorganic composite material has the advantages of high utilization rate, low cost and the like.

The invention discloses acinetobacter baumannii, and a screening method and an application thereof in degradation of an azo dye Congo red. The stain is named as acinetobacter baumannii YNWH226, is preserved in China general microbiological culture collection center, and has the preservation number of CGMCC No.7922. The invention provides the new acinetobacter baumannii and the application thereof in degradation of the dye. Especially, the acinetobacter baumannii can effectively degrade the azo dye Congo red, has quite good decoloration and mineralization effects on Congo red wastewater, can completely mineralize the Congo red under a simple aerobic condition, and has great significance on governance of dye pollution and study on aerobic degradation of the azo dye.

The invention relates to a method for preparing an environment-friendly starch/bentonite composite material. The method is characterized by comprising the following steps: modifying calcium-base bentonite by cation starch, namely fully dispersing the calcium-base bentonite into water, performing washing purification, adding a sodium chloride solution for sodium treatment, then uniformly dispersing the bentonite subjected to sodium treatment into the water, adding the cation starch aqueous solution with a concentration of 1 to 8g/L, controlling the mass ratio of the bentonite subjected to sodium treatment to the solution at 1: (4-8), stirring for 0.5 to 2.5 hours in the water bath at the temperature of 25 to 75 DEG C, performing solid and liquid separation on the product, washing, drying, activating, grinding, screening, and thus obtaining the starch/bentonite composite material. The environment-friendly starch/bentonite composite material is low in cost, high in performance and environment-friendly; compared with the bentonite, the starch/bentonite composite material is changed in the aspect of surface appearance, electric characteristic and interlayer space; the environment-friendly starch/bentonite composite material can remove pollutants such as dye methylene blue, Congo red, p-nitrophenol and hexavalent chromium and is applicable to waste water treatment in the environment-friendly industry.

The invention provides a gel-based pH sensor and a preparation method thereof, belonging to the technical field of intelligent high molecules and sensors. The pH sensor is a composite material which takes polyvinyl alcohol gel as a matrix, and immobilizes and buries poly(acrylamide/methylacrylic acid) gel microspheres and immobilizes Congo red. The preparation method comprises the following steps: preparing a poly(acrylamide/methylacrylic acid) gel microsphere suspension; adding the microsphere suspension to polyvinyl alcohol aqueous liquor to crosslink and gelatinize; soaking a gel film in the Congo red for soaking, alkali treatment and washing to obtain a product. The gel-based pH sensor provided by the invention has the characteristics of absorbancy response and color response, so that visual simple measurement and precise measurement of pH value can be realized, and the using agility and application field of the pH gel sensor can be remarkably improved.

The invention discloses a preparation process and application of rosin-based quaternary ammonium salt positive ion surface active agent modified zeolite and belongs to the technical field of purification and pollutant treatment of drinking water sources. The preparation process comprises the steps of firstly, screening, cleaning, drying, cooling and crushing natural zeolite, and reserving for usage after sieving; and using a rosin-based quaternary ammonium salt positive ion surface active agent of 10mmol/L-100mmol/L to modify the zeolite, so that the rosin-based quaternary ammonium salt positive ion surface active agent modified zeolite is produced. The surface active agent modified zeolite is applicable to removal of dissolved organic matters (humic acid) in drinking water, anionic dye (congo red) in printing and dyeing wastewater and heavy metal pollutants such as copper ions. The preparation process has the advantages that the process is simple in technology, high in utilization ratio, low in cost, wide in application range and simple to operate, modifying agents and matrixes are environment-friendly materials and the like.

The invention discloses a preparation method and an application of an adsorbing agent of pseudo-boehmite and gamma-Al2O3 (nuclear shell) hollow microspheres. The method comprises the following steps: dissolving aluminum sulfate, ammonium alum and aluminum potassium sulfate or a mixture thereof in an arbitrary proportion in distilled water; then respectively adding a certain quantity of urea and sodium tartrate; after the mixture is stirred uniformly, transferring the mixture into a hydrothermal kettle to carry out hydrothermal processing; and respectively obtaining the pseudo-boehmite and the gamma-Al2O3 (nuclear shell) hollow microsphere products after hydrothermal products are naturally cooled, filtered, washed, dried in vacuum and roasted. The method has simple process, moderate condition and good ruggedness of the (nuclear shell) hollow microsphere structure. The prepared pseudo-boehmite/gamma-Al2O3 hollow microspheres have excellent adsorption performance, particularly have good adsorption and purification effects on organic dye such as Congo red in waste water, and the like and hard degraded organic matters such as phenol, and the like and can be regenerated and recycled for many times, and regenerated products have the performance of adsorbing organic pollutants.

The invention discloses a beta-cyclodextrin polymer and a preparation method thereof and an application method of the beta-cyclodextrin polymer in treatment of dye wastewater. The preparation method of the beta-cyclodextrin polymer comprises the steps of: performing a polymerization reaction on beta-cyclodextrin (beta-CD), a cross-linking agent (tetrafluoroterephthalonitrile, TFPN) and a basic salt compound in an organic solvent in an inert atmosphere so as to obtain a polymer, performing a reaction between the obtained polymer with ethanolamine (EA) to obtain a product which is the porous beta-cyclodextrin polymer (EA-CDP). Through the prepared porous beta-cyclodextrin polymer, methyl orange, congo red, acid blue 83, acid yellow G and other anionic dye pollutants in water can be removed quickly, and the beta-cyclodextrin polymer has an adsorption rate constant larger than that of an activated carbon material and low price; in addition, the beta-cyclodextrin polymer can be regeneratedmultiple times under mild conditions and has small loss of performance.

The invention relates to a treatment method of organic contaminants of methylene blue and congo red. Copper chloride, octahydrate chromium sodium molybdate and N,N'-bis(4-picolinoyl) ethane hydrocarbon are used as raw materials; a compound of Cu5(mu2-OH)2(4-dpye)2[CrMo6(OH)5O19]2(H2O)4 synthesized by a hydrothermal synthesis method is used as a catalyst; {Cu(4-Hdpye)[CrMo6(OH)6O18](H2O)2} 2H2O is used as an adsorbent, wherein the 4-dpye is N,N'-bis(4-picolinoyl)-1,2-ethane; the method is used for treating waste water containing organic dyestuff molecules of the methylene blue and congo red. The method has the advantages that the synthesis method is simple; the yield is high; the compatibility on various water-soluble contaminants is high; the treatment effect is good; adsorbed dyestuff molecules can be subjected to desorption decomposition treatment; the repeated use can be realized; secondary pollution of the environment cannot be caused.

The invention discloses a method for treating dye waste water by enzyme production through mixed biomass fermenting. In the method, white rot fungi which can generate a lignin degrading enzyme system are used as a fermenting enzyme-production strain; a solid and liquid culture method is adopted, a cottonseed hull and/or paddy straw are/is used as a fermentation substrate, and lignin degrading enzyme is induced to obtain an optimal lignin degrading enzyme system; and finally, crude enzyme liquid is extracted, separated and prepared and can be used for decoloring treatment of waste water of commonly-used synthetic dye, such as Congo red, phenol red, bromophenol blue, crystal violet, malachite green and the like so as to obtain the optimal decoloring effect of dye sewage. The method is simple and is easy to operate. The enzyme system induced by the method disclosed by the invention has high enzymolysis efficiency, and the optimal decoloring effect can be achieved by adopting the enzyme system to treat the dye waste water.

The invention provides a bacterial strain LT3 producing alkaline cellulose and a breeding method and an initial optimization of cellulose production conditions thereof. The bacterial strain LT3 with higher secretory volume of alkaline cellulose is obtained by steps of conducting accumulation culture, separation and purification, identification of Congo red dye and liquid fermentation on samples obtained from rotten wood or nearby soil thereof; the bacterial strain is identified to be bacillus cereus by initial identification, sequence clone and phylogenetic analysis; and 16s and r DNA sequences are shown as sequence list SEQ ID NO.1. The invention has potential theoretical and application values for research on the action mechanism of the alkaline cellulose and the production of the alkaline cellulose preparation; and the bacterial strain LT3 of the alkaline cellulose can produce the alkaline cellulose of single component and is convenient for separation and purification, thus being an ideal material for gene clone of the alkaline cellulose and having potential theoretical and practical significances for constructing alkaline cellulose fibrinolysis engineered bacterial strain and questing the action mechanism of the alkaline cellulose, and the method is simple, fast and easy for implementation.

The invention discloses a preparation method of high-purity hyodeoxycholic acid. The preparation method comprises the steps: weighing raw materials, adding strong alkaline and water, saponifying at the temperature of 95-100 DEG C for 16-24h, cooling to room temperature, standing, siphoning to remove a supernatant liquid, adding water into paste in the lower layer, stirring for dissolving the paste, adding strong acid to acidize until a congo red test paper turns to be blue, adding ethyl acetate, stirring for extracting for 20-50min, standing for layering, removing a water phase, adding water into the ethyl acetate to wash until the pH value of the water phase is equal to 6-7, adding the ethyl acetate into anhydrous sodium sulfate to dehydrate, carrying out activated carbon decoloration, filtering, concentrating until precipitates are separated out, cooling, filtering or squeezing and drying in vacuum; adding an alcohol solvent, stirring for dissolving the above product, slowly adding an alkaline organic solvent, stirring, cooling, separating out a great number of precipitates, filtering and drying; and adding water and sodium hydroxide, stirring for dissolving, dropwise adding hydrochloric acid with a volume concentration of 1:1, stirring, filtering and drying to obtain the hyodeoxycholic acid. The invention aims to provide the preparation method of the hyodeoxycholic acid with simple process, high yield and high purity.

The invention relates to a high-strength dialdehyde microfibrillar cellulose/chitosan composite membrane and a preparation method and application thereof. The preparation method comprises the specific steps that 1, micro-fibrillation treatment is conducted on microcrystalline cellulose to obtain MFC suspension liquid; 2, oxidation treatment is conducted on the MFC suspension liquid by using periodate, dialysis is performed with deionized water for 1-3 days to remove non-reacted periodate so as to obtain dialdehyde MFC suspension liquid after the oxidation treatment is completed; 3, the dialdehyde MFC suspension liquid and a chitosan-acetic acid solution perform mixed reaction at the temperature of 50+/-10 DEG C for 2-4 hours, and after the reaction is completed, and a reaction product is subjected to membrane spreading by adopting a tape casting method and then is dried. The composite membrane prepared by means of the preparation method has higher strength, the tensile strength is above 70 MPa, a huge network structure greatly improves the stability of a pure chitosan material in an acid solution, the composite membrane can be widely used for adsorption and treatment of dyes in wastewater, especially has efficient adsorption performance to a Congo red dye and has wide application prospect in wastewater treatment.

The invention discloses a preparation method for a modified kieselguhr composite adsorbing material. The method comprises the following steps of: 1) dissolving chitosan in the solution of a trivalent ferric salt, adding kieselguhr into the solution, and uniformly mixing the materials; 2) adding ethanol into the mixture to obtain a sediment, and filtering, washing and drying the sediment; and 3) adding the product obtained in the step 2) into the solution of ethanol of glutaraldehyde to be subjected to cross-linking reaction, and filtering, washing and drying the sediment. The preparation method has the beneficial effect that the kieselguhr prepared by the method is large in specific surface area and high in adsorption capacity. A dynamic absorbing experiment on Congo red shows that the highest adsorbing capacity of a composite material can be up to 1,250mg/g and the time for the balance of adsorption is not more than 10min.

The invention relates to high-specific-surface-area hierarchical porous gamma-AlOOH hollow microspheres and a preparation method and an application of the hollow microspheres, and belongs to the technical field of inorganic nonmetallic materials. The preparation method of the microspheres comprises the steps as follows: a mixed solution of aluminium potassium sulfate and urea is subjected to a microwave hydrothermal reaction, so that the high-specific-surface-area hierarchical porous gamma-AlOOH hollow microspheres are obtained; and the mixed solution is calcinated again, so that high-specific-surface-area hierarchical porous gamma-Al2O3 hollow microspheres are obtained. Both the gamma-AlOOH hollow microspheres and the gamma-Al2O3 hollow microspheres are all hierarchical porous cauliflower-shaped hollow microspheres, the diameters range between 600 nm and 1000 nm, and the specific surface areas are large; the rate of adsorption rate to Congo red in the solution is high, the adsorption capacity is large, and the microspheres can be used repeatedly; and at the same time, the microspheres have a good effect of adsorbing formaldehyde in indoor air. According to the method, a synthetic route is simple, the reaction time is short, raw materials are easy to obtain, the reproducibility of the hollow microspheres is good, and the hollow microspheres are applicable to industrial production.

The invention relates to a nano cellulose cross-linked graphene/chitosan aerogel as well as a preparation method and application thereof, belonging to the field of dye adsorption of aerogel. The nanocellulose cross-linked graphene/chitosan aerogel is prepared by mixing and cross linking dialdehyde nano cellulose, amido modified oxidized graphene and chitosan. The nano cellulose cross-linked graphene/chitosan aerogel not only has excellent adsorption property of graphene and chitosan but also avoids use of a toxic cross linking agent, and meanwhile exerts the advantage of large specific surface area of nano cellulose, easily separates from water body, does not generate secondary pollution, and is an environmental-friendly novel adsorption material. Measurement on adsorption property of organic dye shows that the nano cellulose cross-linked graphene/chitosan aerogel has good adsorption effect on congo red and amino black, has more than 92% of removal rate, and is quick in adsorption process, is easily separated after adsorption, and has good application prospect.

The invention discloses a preparation method and application of a corn stalk-carrier palladium-loaded catalytic composite material. The preparation method comprises the following steps: peeling air-dried corn stalk, moulding to obtain a raw material with the qualified three-dimensional size, boiling the corn stalk in hot water, performing a degreasing reaction through benzene-alcohol solution suction extraction, then heating the dried degreased corn stalk, soaking in an aqueous palladium chloride/hydrochloric acid solution for a long time, reducing Pd ions into elemental Pd and loading the elemental Pd into the corn stalk in the form of nanoparticles so as to obtain the corn stalk-carrier palladium-loaded catalytic composite material. The catalytic composite material has high-efficiency capabilities of decolorizing and degrading methylene blue, Congo red and methyl orange, and has biodegradability, and is an environment-friendly organic dye degradation catalyzing material.

The invention relates to a treatment method of Congo red dye wastewater. The treatment method comprises the following steps of: carrying out modifying treatment on kieselguhr, immobilizing white rot fungi by the modified kieselguhr, adding 3-5g by mass of obtained modified kieselguhr with the white rot fungi being immobilized into 50mL Congo red dye wastewater; dissolving 20-40mg by mass of Congo red into 1L of a white rot fungi liquid restrictive culture medium; treating on a gas bath constant-temperature shaking table at the speed of 120rpm at 28 DEG C for 120 hours, and measuring the chroma of the dye wastewater at an interval of 24 hours; after 120 hours, discarding the treated dye wastewater, retaining the immobilized white rot fungi, adding 50mL of prepared Congo red dye wastewater with the same concentration; under the treatment conditions, measuring the chroma of the wastewater at an interval of 24 hours, and repeating 5 times at an interval of 120 hours, wherein the removal rate of the chroma of the dye wastewater is always maintained at 75.1-93.2%. The kieselguhr is purchased from Jilin Changbai Kieselguhr Co., Ltd, and the white rot fungi comes from China General Microbiological Culture Collection Center.

The invention discloses a preparation method of poly siloxane quaternary ammonium modified zeolite and the application thereof. Natural zeolite is taken as a carrier, and in situ polymerization is performed on the surface of the natural zeolite through a siloxane quaternary ammonium monomeric compound, so that the poly siloxane quaternary ammonium modified zeolite which is harmless to the environment is obtained. The poly siloxane quaternary ammonium modified zeolite has positive charge on the surface, not only has high adsorption capacity to pollutant with negative charge in the water, such as Cr2O72 I, humic acid and Congo red, but also has effects of strong bacteriostasis and antibiosis, and can be widely applied to purification and disinfection treatment of various water bodies. The preparation method is simple, the obtained poly siloxane quaternary ammonium modified zeolite has long service life; and compared with unmodified natural zeolite, the poly siloxane quaternary ammonium modified zeolite has the advantages that the adsorption capacity to negative ion in the water and organic pollutant is greatly improved, and simultaneously the poly siloxane quaternary ammonium modified zeolite restrains the reproduction and growth of harmful microbe while purifying water bodies.

The invention discloses a bacterial strain for producing laccase, a method for producing laccase by the bacterial strain, the produced laccase and application of the laccase, and relates to the field of microbial enzyme. The bacterial strain for producing laccase is trametes pubescens (Trametes pubescens BJFC-C1108) with a microbial preservation number of CGMCC No. 10308. By utilizing the trametes pubescens (Trametes pubescens BJFC-C1108), the yield of the produced laccase is relatively high; the enzyme activity can be up to 28.687 U/mL; the prepared laccase has relatively high activity, stability and tolerance under the alkali condition (pH 7.0-10.0), has relatively high tolerance for metal ions, can be used for shortening the time required by complete decoloring of azo dye Congo red to a certain extent, has a potential application value, can be applied to more industrial fields and has favorable development and application prospects.

The invention provides a three-dimensional graphene/Fe3O4 magnetic nanometer adsorption material. The material is obtained by ultrasonically crushing graphene oxide, adding Fe<3+> and L-Cys and performing one-pot coprecipitation under an alkaline condition. Characterization by a scanning electron microscope, a transmission electron microscope, X-ray diffraction, infrared spectroscopy, N2 adsorption and desorption and other methods prove that the three-dimensional graphene grafted with Fe3O4 magnetic nanoparticles has a good three-dimensional structure. The nanometer material synthesis method is simple and low in cost, has a large specific surface area, rich hydroxyl groups and free carboxyl groups and good magnetic properties, and can be used as an adsorption material for dye contaminantsin an aqueous solution. Adsorption property research is carried out by taking cationic methylene blue (MB), anionic Congo red (CR) and neutral type neutral red (NR) dyes as model molecules, and indicates that the material can effectively adsorb cationic, anionic and neutral dyes, and has potential applications in environmental pollutant adsorption materials.