2455 results about "Methylene blue" patented technology

The invention is an enzyme biologic and chemical reaction measure method to mensurate homotype cysteine in a biologic sample. Cysteine can lose its ammonia and be changed into alpha-4-ketone acid, ammonia and sulfureted hydrogen by L-ovi-ammonia acid and Y-dispeling enzyme. Sulfureted hydrogen and fluorescence cpd.DMPD2HCL can create blue product-sub-armour blue whose degree of absorbing light is 670nm, in the situation of Fe3+ and acid. Thus, people can mensurate the chroma of homotype cysteine in a biologic sample by knowing this degree. This method can measure the chroma of homotype cysteine(3-1000 uMs). The invention also involves a reagent box used for implementing the method mentioned above. The box uses liquid double reagents, and needs less quantity of samples(25 microlitre or serum or plasm);In addition, the respond time is short, and the operation is easy. Thus, this method is suitable for a great deal of examinations. The reagent box costs less than other types.

A semi-stationary balloon in the gastric antrum provided with an anchoring rod for inducing weight reduction in human beings is disclosed, a device for inducing a lesser appetite and early prandial satiety, said balloon being made of inflatable per-os medical grade silicone having a volume of up to 240 ml, with an average space of 120 ml to be filled with non-elastic fluid provided with radio-opaque contrast and dye, preferably methylene blue, so that the maximum diameter of 8 cm is reached after it is filled up with a volume of up to 240 ml and the average diameter of 6 cm with a volume of 120 ml, to be endoscopically placed inside the stomach (E); said intra-gastric balloon (1) being positioned in a semi-stationary way in the gastric antrum (GAC) and provided with an anchoring or duodenal rod (2) having a distal counter-weight (5) installed in the duodenum (D); particularly, the inner face of the pear-shaped medium portion of lesser diameter is coated with a malleable ribbon (f) that provides said balloon (1) with resistance and flexibility.

An apparatus and method for the phototherapy of different skin conditions, particularly acne vulgaris and seborrhea. The invention transporting compounds, and / or a methylene blue solution. The apparatus includes at least one narrow spectral band light source with spectral emittance concentrated in the violet / blue spectral band and an optical system for controlling spectra and beam parameters of said light source and a mechanical fixture for holding the said light source at an adjustable distance and direction related to the skin treated area, and an electonic unit to control the duration and power and spectral bands of the emitted radiation.

The invention discloses a high-efficiency graphene / silver phosphate composite visible light photocatalyst and a preparation method thereof, belonging to the technical field of composite materials and environmental management photocatalysis. The preparation method comprises the following steps: dissolving graphene oxide in water, and carrying out ultrasonic treatment to obtain a graphene oxide dispersed liquid; dissolving silver nitrate in deionized water, gradually and dropwisely adding into the graphene oxide dispersed liquid while stirring to obtain a mixed solution, uniformly stirring, and aging; dropwisely adding a prepared disodium hydrogen phosphate or sodium dihydrogen phosphate solution into the graphene oxide-silver nitrate mixed solution, continuing stirring, transferring into a hydrothermal reaction kettle, carrying out hydrothermal reaction, and cooling to room temperature; and washing the reaction product, and carrying out vacuum drying to obtain the visible light photocatalyst. The invention has the advantages of wide material sources and simple preparation process; and the obtained composite material has the advantages of controllable structure and regular pattern, and has high-efficiency degradation effect on organic dyes rhodamine B and methylene blue with certain concentration under the visible light irradiation.

Disclosed are methods and apparatus for safe, simple and effective broad-spectrum treatments of chronic rhinosinusitis and other common and less common infections of the sino-nasal tract which may implicate not only a wide range of bacterial species but also fungi and viruses. Electromagnetic radiative energy including visible, and optionally, thermal RF, microwave or other longer wavelengths, is applied to target internal surfaces of the sino-nasal tract to destroy or incapacitate superficial microorganisms without the use of antibiotics. The treatment can be controlled to permit regrowth of healthy microflora. A handheld energy applicator has a light output head receivable into, or engageable with, the treatment subject's nostril which may be provided with extensions to reach the sinuses. Useful embodiments of the invention include pretreatment of target sino-nasal surfaces with a photosensitizing agent such as an oxidizing agent or a complementary stain. For example methylene blue can be used with orange or red light. The combination treatment of photosensitizer and application of visual wavelength energy provides a flexible treatment regimen which enables low concentrations of stains to be employed, minimizing aesthetic problems.

The invention relates to a preparation method and application method of a titanium dioxide nanosheet supported MIL-100 (Fe) composite photocatalysis material, belongs to the field of titanium dioxide photocatalysis, and especially relates to the field of titanium dioxide nanosheet supported porous metal organic skeleton (MOFs) composite materials. The preparation method comprises the following steps: 1, uniformly stirring tetrabutyl titanate and hydrofluoric acid at normal temperature, putting the obtained mixture in a hydrothermal reaction kettle, carrying out a reaction, separating the obtained material, washing the separated material, and drying the washed material to obtain titanium dioxide nanosheets; and 2, uniformly dispersing the titanium dioxide nanosheets in an anhydrous ethanol solution of iron trichloride, carrying out magnetic stirring at normal temperature for 15 min, carrying out suction filtration separation to obtain a product, dispersing the product in an anhydrous ethanol solution of trimesic acid, carrying out a 50-80 DEG C water bath reaction for 20-50 min, carrying out suction filtration separation to obtain a product, and repeating above processes in step 2 2-50 times to obtain the titanium dioxide nanosheet supported MIL-100 (Fe) composite photocatalysis material. The catalyst prepared through the method is especially suitable for catalytic degradation of high-concentration organic dyes (such as methylene blue) under visible light irritation) to reach a very high degradation rate.

The present invention relates to the development of water purifying compositions based on magnetic nanoparticles decorated activated carbon nanocomposites which display both magnetic character as well as adsorbent characteristics. The addition of adsorbent to impure water containing dye as pollutant enables the fast adsorption of dye leading to discoloration of water whereas magnetic properties facilitates the rapid isolation of pollutant adsorbed nanocomposites powder from the purified water with the aid of a magnet. The present invention also provides a process for the development of such multifunctional adsorbent using a process which enables decoration of adsorbent with 5-50 weight % of magnetic nanoparticles, the enables the realization of magnetic adsorbent having saturation magnetization in the range 0.09 to 28.3 emu / g, dye removal efficiency of >99%, rapid decolourization of methylene blue (MB) / methyl orange (MO) dye polluted water in less than 1 min, magnetic separation time in the range <0.2 to 60 min and dye sorption capacity in the range of 3.3×10−4 to 116.3×10−4 mol of MB and 3.6×10−4 to 148.6×10−4 mol of MO dye per 100 gram of nanocomposite powder in a rapid adsorption (<1 min) and magnetic separation process. Besides, these nanocomposites could also be useful for other of applications e.g. as separation of catalytic residues from the products, for removal of oil from water, filler for development of thermally / electrically conducting magneto-rheological fluids or for handling of electromagnetic pollution.

The invention relates to a preparation method for super active carbon. Wherein, carbonizing and breaking up the raw material of coco shell or walnut shell to predetermined particle size and mix evenly with solid potassium hydroxide; activating the mixture in microwave oven with nitrogen protection during the process to obtain activation material; clearing the material with muriatic acid and then distilled water for many times to neutrality and obtain the said product. The product with this method has strong adsorption property, high specific surface area and high adsorption value to iodine and methylene blue. The method is simple and convenient to control.

The present invention relates to a phenothiazinium compound of Formula (I): wherein: A and B each independently is in which R' and R'' each independently is a linear, branched or cyclic hydrocarbon group, or R' and R'' together with the N atom to which they are attached form an optionally substituted 5-, 6- or 7-membered ring; and where X<p-> is a counteranion and P is 1, 2 or 3; except for the compounds in which A and B are both either -N(CH3)2 or -N(CH2CH3)2 for use in a treatment that requires removal, deactivation or killing of unwanted tissues or cells. The invention also relates to compositions comprising the compounds of Formula I, to selected compounds of Formula I, use of the compounds of Formula I as medicaments and as a PDT agent or a photodiagnostic agent, a conjugate or composite formed between a compound of Formula I and a polymer; and to a method for sterilising fluids in which the fluid is passed over the conjugate or composite whilst it is illuminated. The compounds are biologically active photosensitisers which are strongly photocytotoxic and have application in the areas of photodynamic therapy (PDT), as well as for the diagnosis and detection of medical conditions and related uses in photochemical internalisation, in the production of cancer vaccines, in the treatment and prevention of microbial infections and in photodisinfection or photosterilisation.

The invention relates to a method for preparing activated carbon with humic acid as a raw material and an application of the activated carbon. The method comprises the steps of mixing industrial humic acid with an activating agent which is potassium hydroxide, sodium hydroxide, zinc chloride, potassium carbonate or phosphoric acid uniformly to react under inert atmosphere protection for 1-5 hours; then cooling the product, washing the product in an acid solution until the pH value is 6-7 and drying the product, thus obtaining the activated carbon. The method is convenient to operate, is relatively low in energy consumption and is suitable for large-scale industrial production. The humic acid porous activated carbon material obtained by the method has a rich porous structure and a relatively big specific surface area, is used for preparing water purifiers or electrode materials of supercapacitors, and has methylene blue dye adsorption value of 600mg / g. Besides, the humic acid porous activated carbon material is used as the electrode material of a supercapacitor to assemble a high-performance supercapacitor. The specific capacitance of the activated carbon single electrode is 351Fg<-1>. Various test results show that the activated carbon is microporous-mesoporous composite carbon and has specific surface area of about 3200m<2> / g, the pore size distribution of the activated carbon is 1-5nm, and the pore volume of the activated carbon is about 2cm<3> / g.

A device and method utilizes a broadband diffuse optical spectroscopy (DOS) system to dynamically calculate the concentrations of multiple chromophores in vivo using a non-invasive probe. The device and method permit dynamic monitoring of multiple in vivo tissue chromophores non-invasively with sensitivities necessary for effective therapeutic monitoring. The device includes a probe containing first and second source optical fibers as well as first and second detector optical fibers. The probe is placed adjacent to a sample of interest and detects reflected light which is passed to a proximally located detector and spectrometer. The concentrations of multiple chromophores are determined in real time. In a preferred embodiment, the multiple tissue chromophores include at least two of methemoglobin (MetHb), deoxyhemoglobin (Hb-R), oxyhemoglobin (Hb-O2), water (H2O), and methylene blue (MB). The device and method can be used quantify and monitor methemoglobin formation in subjects suffering from methemoglobinemia.

Pharmaceutical compositions comprising a fatty acid salt, a dicarboxylic acid salt, an alkyl sulfate salt, an aryl sulfate salt or an alkyl aryl sulfonate salt of methylene blue or a derivative of methylene blue are described herein. The compositions are preferably administered orally and can be administered as tablets, soft or hard shell capsules (e.g. soft gelatin capsules), suspensions or solutions. The composition can also be formulated as a suppository or enema or rectal administration. The compositions further comprise a pharmaceutically acceptable carrier and optionally one or more pharmaceutically acceptable excipients. Suitable excipients include diluents, binders, plasticizers, lubricants, disintegrants, colorants, stabilizers, surfactants, and combinations thereof. The fatty acid salts, alkyl sulate salts, aryl sulfate salts or alkyl aryl sulfonate salts can be co-mixed or co-melted with one or more fatty acids to make more hydrophobic compositions, which may result in less staining formulations. The compositions can be formulated for immediate release, controlled release such as extended release, delayed release, and pulsatile release, or combinations thereof. In one embodiment, the derivative of methylene blue is methylene dodecylsulfate.

The invention relates to preparation of a magnetic nano adsorbent and a method for removing organic cationic dyes from waste water by the same, and belongs to the technical field of wastewater treatment. The magnetic nano adsorbent uses Fe3O4 particles as a carrier, and coated humic acid as an active adsorbing component. The method comprises the following steps: adding mixed solution of ferric chloride and ferrous sulfate to alkaline humic acid solution, reacting under anaerobic, heating and stirring conditions, and obtaining the magnetic nano adsorbent after magnetic separation, washing, drying and grinding. The removal rate of methylene blue and neutral red reaches more than 95% by treating organic cationic dye wastewater with the magnetic nano adsorbent. The magnetic nano adsorbent after magnetic solid-liquid separation is regenerated by methanol-acetic acid solution, a desorption solvent recovers methanol and acetic acid by distillation for recycling use. The magnetic nano adsorbent has the advantages of nanoscale size, high active surface radicals, extremely high adsorption removal rate for cationic dyes, simple process, high efficiency and easy control.

The invention discloses an ion exchange nonwoven fabric with high carboxyl content and a preparation method thereof. The method comprises the following steps of: cleaning a polypropylene nonwoven fabric, drying, and soaking in acrylic acid monomer solution prepared from an acetone / water mixed solvent at room temperature under the lightproof condition; stacking a plurality of layers of soaked nonwoven fabrics, spreading on a supporting utensil, and irradiating by using an ultraviolet lamp; and taking out, separating the layers of nonwoven fabrics, boiling for multiple times by using boiling water to remove unpolymerized acrylic acid and homopolymer thereof, and drying to obtain the ion exchange nonwoven fabric with the high carboxyl content, wherein the carboxyl content of the nonwoven fabric is more than 10mmol / g, and the capacities of adsorbing pb<2+> and methylene blue of the nonwoven fabric are 104.5mg / g and 835.0mg / g. The production process is short, the process is simple, applicability is high, special equipment is not needed, raw material sources are wide, industrial popularization is easy to implement, and the ion exchange nonwoven fabric can be widely applied to the fields of water treatment, noble metal ion recovery, medicine separation and extraction, battery diaphragm materials and the like.

The invention discloses application and a preparation method of biomass-based nitrogen-doped porous carbon. The method includes: taking cheap cellulose carbamate as a raw material and urea as a nitrogen source, well mixing with sodium hydroxide solution, drying to form sol, and performing high-temperature calcination to obtain the porous-structure biomass-based nitrogen-doped porous carbon high in specific surface area and pore volume. According to electron microscopy images, the prepared material is in a three-dimensional inner-crosslinked porous structure; according to XPS and elemental analysis, nitrogen is successfully doped into a carbon substrate, the nitrogen content is 7.7-15.5%, and the specific surface area is 700-3700m<2> / g; according to supercapacitor experiments, the biomass-based nitrogen-doped porous carbon is great in electrochemical performance; according to pollutant adsorption experimental data, the material is high in adsorption rate and adsorption capacity in adsorption of dye pollutant methylene blue, and the adsorption capacity reaches 1520mg / g. The method is simple in preparation, the raw materials are renewable, and low cost is realized. In addition, sodium carbonate which is a by-product is obtained by washing of calcined samples, so that cost can be effectively reduced, and economic benefits are increased.

The invention discloses a preparation method of cobalt-loaded mesoporous graphite-phase carbon nitride (Co / mpg-C3N4) and an application of cobalt-loaded mesoporous graphite-phase carbon nitride (Co / mpg-C3N4) in visible-light-induced catalytic degradation of methylene blue. The catalyst is prepared by steeping a cobalt precursor and roasting at high temperature. The preparation method comprises the following steps of: (1) roasting at high temperature by using silica solution (Ludox, HS-40, 12nm, 40wt%SiO2) as a template and cyanamide as a carbon source and a nitrogen source, and removing the template to prepare mesoporous graphite-phase carbon nitride (mpg-C3N4); and (2) steeping the precursor solution of cobalt into mpg-C3N4, carrying out secondary high-temperature roasting in a muffle furnace to prepare the load-type catalyst Co / mpg-C3N4. By using the cobalt-carried mesoporous graphite-phase carbon nitride as the visible-light-induced catalyst, the result shows that the effect of the cobalt-carried mesoporous graphite-phase carbon nitride used for the visible-light-induced catalytic degradation of methylene blue is good, and the visible-light-induced catalytic degradation rate is obviously improved in comparison with the mesoporous graphite-phase carbon nitride (mpg-C3N4) without cobalt.

The invention provides a grading three-dimensional porous graphene / titanium dioxide photocatalyst and preparation method thereof. The photocatalyst is composed by a three-dimensional grapheme framework and nano titanium dioxide particles; the grahene is provided with a macroporous structure; titanium dioxide is mesoporous titanium dioxide; the macropores and the mesopores are communicated; the nano titanium dioxide particles are scattered on a grapheme nano sheet; the surfaces of nano titanium dioxide microspheres are wrapped with graphene nano sheets; the macropores of the graphene are filled with the nano titanium dioxide microspheres. The photocatalyst with a three-dimensional structure can not only prevent the graphene sheet layers from stacking, but also scatter titanium dioxide particles excellently, and is high in specific surface area; besides, samples can be used for photocatalysis degradation of methylene blue, and the methylene blue can be fully degraded in 25 minutes. The preparation method provides a new thought for preparation of the photocatalyst, and has a potential application value in the fields of energy sources and environment.

The production process of active carbon with wooden material features the activating assistant phosphoric acid, activating agent mixed acid comprising sulfuric acid, hydrochloric acid, etc., increased curing and hardening steps and the active carbon product with strong adsorption performance to macro molecular compounds and high strength. The prepared fruit shell active carbon has methylene blue adsorbing rate up to 300 mg / g, caramel decoloring rate of 160 %, iodine adsorbing value up to 1200 mg / g, strength higher than 80 % and yield up to 33 %. The prepared wood dust active carbon has methylene blue adsorbing rate up to 255 mg / g, caramel decoloring rate of 180 % and yield up to 30 %.

The invention provides a beta-cyclodextrin functionalized Fe3O4 magnetic nanometer adsorbent. The beta-cyclodextrin functionalized Fe3O4 magnetic nanometer adsorbent is prepared through a lay-by-lay assembling method. The beta-cyclodextrin functionalized Fe3O4 magnetic nanometer adsorbent has good stability, good dissolvability and strong adsorption capability. The beta-cyclodextrin functionalized Fe3O4 magnetic nanometer adsorbent has strong effects of adsorbing azo dyes such as methylene blue, methylene red and the like in waste water. The invention also provides a method for removing methylene blue in waste water. The method comprises the following steps of putting the beta-cyclodextrin functionalized Fe3O4 magnetic nanometer adsorbent into an aqueous solution containing methylene blue, adjusting a pH value of the reaction system to a pH value of 7 to 8, carrying out ultrasonic dispersion for 0.5 to 1 hour, carrying out oscillation for 8 to 10 hours, and separating out precipitates by a permanent magnet. The method for removing methylene blue in waste water has the advantages of good adsorption effects, mild reaction, simple processes, simplification of solid-liquid separation, less secondary pollution and good feasibility for large-scale application.

The invention relates to a high quality active carbon production method using rice husk ash, belonging to active carbon manufacture technical field, which is characterized in that the water glass is made utilizing rice husk ash, and the alkali resolved filter residue is filtered and activated using potassium hydroxide as activator; the active carbon with high absorption value is made after rising and drying. The silicon dioxide in the alkali resolved filter residue is efficiently eliminated while in activation in the invention; the absorption performance of the obtained active carbon is good, and the methylene blue adsorption reaches to more than 20 mL / 0.1 g; each index meet national standard. The high quality active carbon is made utilizing the alkali resolved filter residue after the water class is made by rice husk ash; the produced active carbon has the advantages of good quality (the methylene blue adsorption reaches to more than 20 mL / 0.1 g and ash is lower than 3%) and low production cost; the pollution of rice husk ash alkali resolved filter residue to environment can be reduced.

The invention provides a method for manufacturing active carbon by using rice hulls and stalks as main raw materials. The method comprises the following steps of: (1) pretreatment of raw materials; (2) carbonizing treatment; (3) acid treatment; and (4) alkali treatment, and screening. After test performed by an active carbon test method specified in the national standards (GB / T 13803.2-1999), the iodine sorption value of the rice hull-stalk active carbon is over 1,000mg / g, and the adsorption rate of methylene blue is over 135mg / g; and the production cost is low.

The invention relates to a preparation method for a bismuth vanadate composite photocatalyst loaded with strontium ferrite, and belongs to the field of inorganic catalytic materials. According to the preparation method, bismuth vanadate adopts the structure of scheelite in the monoclinic system; while the degradation rate, of the composite photocatalyst loaded with the strontium ferrite, for methylene blue can reach 93 percent in 5h, the degradation rate, of a similar composite photocatalyst of bismuth vanadate loaded with ferroferric oxide, for the methylene blue can reach 80 percent in 8 h. Moreover, the prepared composite photocatalyst has photocatalysis activity in relatively-wide wavelength range, and can efficiently and cyclically degrade organic pollutants in heteroaromatic dye-type wastewater under the irradiation of ultraviolet light, visible light and natural light through photocatalysis. Meanwhile, the composite catalyst is convenient to recover with the recovery rate not less than 92 percent; the degradation rate, of the recovered composite catalyst, for the methylene blue can reach 60 percent in 5h. The preparation method is simple and has an excellent application prospect.

The invention discloses a preparation method and an application of a core-shell TiO2 / ZnIn2S4 composite photocatalyst. The preparation method comprises the following steps: performing ultrasonic dispersion on TiO2 in an ethanol solvent; adding zinc chloride and indium nitrate into the ethanol solvent, and stirring to dissolve; mixing the two systems, and adding thioacetamide; transferring the mixed system into a high pressure kettle to react; performing vacuum filtration, washing, drying and grinding on a product after the reaction is finished to obtain the core-shell TiO2 / ZnIn2S4 composite photocatalyst. According to the method, the core-shell TiO2 / ZnIn2S4 composite photocatalyst is prepared in one step by adopting a solvothermal synthesis method, the catalyst is wide in visible light response range and high in photocatalysis activity, is applicable to organic dye wastewater degradation, and can be used for degrading methylene blue-containing wastewater in the field of solar energy transformation and utilization and environment management.

A process for treating the methylene blue dye sewage features that the nano-class oxide of Mn is used as catalyst to catalyze the oxidizing of H2O2 to decompose the methylene blue dye.

The invention discloses a preparation method and application of a cadmium sulfide / graphite like carbon nitride (CdS / g-C3N4) composite visible light catalyst. The preparation method of the catalyst is a chemical precipitation method which is performed in an alkaline environment, wherein g-C3N4 is taken as a matrix, and CdCl2 and Na2S are taken as raw materials. The weight ratio of CdS to g-C3N4 in CdS / g-C3N4 is (1:2)-(5:1), and when the composite visible light catalyst is used for visible light catalysis treatment of methylene blue and methyl violet solutions, a better degradation effect can be obtained; and furthermore, the catalyst can still keep higher catalytic activity after being reused for five times. The composite visible light catalyst disclosed by the invention has important significance for development of the visible light catalyst, and also has good application prospects in treatment of dye wastewater.

The invention discloses preparation of a Ni<2+> doped geopolymer catalyst and application of the catalyst in organic matter degradation. The preparation method utilizes industrial solid waste fly ash or mineral slag or steel slag as the raw material, which, excited by a chemical exciting agent sodium silicate, can generate a fly ash or mineral slag or steel slag based geopolymer respectively. Then through NH4<+> and Ni<2+> ion exchange reactions in order, a Ni<2+> doped geopolymer catalyst can be generated. The catalyst can be used for degradation reaction of methylene blue in industrial wastewater and has a degradation rate up to 77.29%. The preparation and organic matter degradation processes have the advantages of simplicity and practicability, no need for heating, energy saving and environmental protection, thus being able to realize large scale preparation and application.

The invention relates to a reutilization and deep processing method of rice hulls for producing activated carbon, sodium silicate, silicon dioxide and other inorganic silicon compounds. The method comprises the following steps: carrying out pyrolytic carbonization on the rice hulls, desilicifying, activating, washing with water, drying and the like. By using the rice hulls as the raw material, the production technique is green and environment-friendly; the extracted silicon dioxide has the advantages of high purity and fewer impurities, and can reach nano level; and the modulus of the sodium silicate product subjected to secondary mold extraction can reach 3 above, and thus, the application range is wide. By performing the special activating technique on the raw material rice hulls, the activated carbon product has the advantages of fewer impurities and high activity, and the methylene blue adsorptive value can reach 25ml / 0.1g.All water and alkalis in the whole production technique can be recycled and reutilized, and all the energies consumed in the technical process are heat provided by rice hull pyrolysis, so the production cost is low. The technique is simple and easy to operate, implements high-added-value effective reutilization of the rice hulls, and has the advantages of energy saving and environment protection.

The invention discloses a preparation method for jute-based active carbon, and the method comprises the following steps of: weighing jute fibres or crushed jute stem materials, cleaning and drying, soaking in a beaker filled with a 3-5mol / L phosphoric acid solution, boiling for 3-10 hours in a water bath, adequately penetrating an activating agent into the fibres, then taking out and drying; placing in a vacuum tubular high-temperature sintering furnace, activating to 400-500 DEG C in a nitrogen atmosphere, insulating for 1-3 hours, or placing in a columnar quartz tube, placing in a microwave device, and performing a microwave irradiation reaction with a microwave irradiation power of 100-700 W and an irradiation time of 5-30 minutes in the presence of nitrogen used as protective gas; and cooling to a room temperature, then taking out, acid-washing and repeatedly water-washing until the pH is 6-7, and then drying to obtain the jute-based active carbon. The jute-based active carbon prepared by the method has the advantage of being high in methylene blue adsorption value and activation yield.