49results about How to "Rich void structure" patented technology

The invention discloses a modified magnetic sludge biological carbon and a preparation method and applications thereof. The modified magnetic sludge biological carbon is prepared by carbonizing residual sludge, modifying sludge by alkali, and modifying sludge by acid. The provided modified magnetic sludge biological carbon has the advantages of good magnetic property, large specific surface and pore volume, abundant pore structure, many surface adsorption functional groups and adsorption sites, and strong performance on removing target pollutants; and the preparation method has the advantages of simple preparation, easy operation, low cost, high production efficiency, and convenience for large scale production. The provided modified magnetic sludge biological carbon is used to remove tetracycline hydrochloride in water for the first time, has the advantages of large adsorption amount, strong adsorption performance, high adsorption efficiency, simple and convenient operation, short processing period, low processing cost, and easy separation and recovery, and has a strong performance on removing tetracycline hydrochloride. The maximal balance adsorption amount can reach 253.8 mg / g. The performance of the biological carbon is obviously stronger than that of unmodified magnetic sludge biological carbon.

The invention discloses a preparation method of a covalent organic framework / carbon nitride composite material and application thereof. Firstly, a covalent organic framework material is synthesized byusing p-phenylenediamine and triformyl phloroglucinol as synthetic monomers through a room-temperature solid-phase method, then the covalent organic framework material and carbon nitride are mixed, stirred and dried in methyl alcohol, and pyrolysis is carried out under the protection of inert gas to obtain a target product. The covalent organic framework / carbon nitride composite material disclosed by the invention is large in specific surface area, high in nitrogen doping amount and rich in pore structure and can effectively remove toxic organic pollutants in water by constructing a novel Fenton-like system, and new application of the covalent organic framework material in the field of catalysis is expanded; unavoidable metal ion leaching in the activating process of a metal nano catalystis overcome; and the preparation method has the advantages of simple process, easiness for repeated operation, controllable structure, suitability for large-scale production and the like.

The invention relates to a method for preparing carbon molecular sieve by petroleum coke preoxidation treatment, comprising the steps of: firstly crushing petroleum coke, then adopting oxidant to make dipping oxidizing treatment on the petroleum coke powder to change its chemical composition and surface properties so as to benefit formation and development of hole structure in the follow-up carbonizing and activating courses; then adding in a proper amount of adhesive, bonding assistant and water to knead uniformly, moulding the kneaded matter, drying and carbonizing the moulded matter, and controlling activation and carbon deposition hole regulation treatments according to the requirements. And it has beneficial effects of: high product intensity, large micropore capacity, narrow aperture distribution, and the product can be used to make nitrogen by air separation with PSA process.

The invention discloses a porous manganese dioxide of nanofibre texture and a preparation method thereof. Hydro-thermal reaction is carried out on an aqueous solution containing Mn 2+ and an aqueous solution containing tartrate ion to firstly prepare micron-sized stripe-shaped manganese tartrate crystal; then, manganese tartrate is calcined under the controlled process condition to obtain porous manganese sesquioxide; and finally, oxidizing reaction is carried out on the manganese sesquioxide with a low-temperature hydrothermal method to synthetize porous manganese dioxide with nanofibre texture. The porous manganese dioxide of the invention is weaved by even nanofibre texture, which not only ensures larger specific surface area but also provides smooth high-porosity path for the chemical process to transfer mass. The composite method of the invention is different from the oxidizing atmosphere calcination synthesis method at high temperature; and products are synthetized at low temperature so as to totally avoid the disadvantage that manganese oxide is easy to sinter at high temperature, so that the products can keep the feature of a precursor and can realize the porous structure of the nanofibre texture.

The invention discloses a compound microbial preparation as well as a preparation method and application thereof. The preparation comprises phanerochaete chrysosporium balls, polyvinyl alcohol, silicon dioxide, activated carbon, sodium alginate and zeolite powder, which form the compound microbial preparation through crosslinking by a solution with sodium dihydrogen phosphate. The preparation method comprises the steps of preparing a gel liquid with the polyvinyl alcohol, sodium alginate, silicon dioxide and zeolite powder, mixing with a phanerochaete chrysosporium spore suspension with the activated carbon, then gradually dripping into the solution with the sodium dihydrogen phosphate so as to prepare embedded balls, and cultivating by a Kirk inorganic culture solution so as to prepare the compound microbial preparation. The compound microbial preparation has many gaps, high adsorption efficiency and good selectivity, the adsorbent has strong stability, the preparation method has the advantages of simple operation, low cost, affordability and so on, and the compound microbial preparation can be used for eliminating cadmium and 2, 4-dichlorophen in waste water.

The invention discloses a method for preparing a three-dimensional carbon material. The method comprising: S1) soaking a sponge in a soluble catalyst precursor aqueous solution, after drying, obtaining a soaked sponge; the soluble catalyst being a salt compound of iron series element; S2) heating the soaked sponge in a protective atmosphere and keeping the temperature, and obtaining the three-dimensional carbon material. Compared with the prior art, according to the invention, the sponge is used as a solid carbon source, the sponge adsorbs catalyst precursor in an early stage, and then in theprotective atmosphere, the sponge is pyrolyzed and carbonized, the catalyst is generated in situ, and the carbon nanotube grows at the same time; the three-dimensional carbon material with the carbonnanotube winding a carbonized sponge framework is prepared, the method is simple without requiring post processing; moreover, the three-dimensional carbon material maintains the elasticity and the three-dimensional framework structure of the sponge, has certain conductivity, also has a larger specific surface area and rich void structures, and after depositing metal lithium, and the three-dimensional carbon material maintains the elasticity and the three-dimensional framework structure of the sponge can achieve high current density and high surface capacity without dendrite formation.

The invention relates to a method for preparing a solid acid catalyst. The method comprises the steps of preparing active carbon by using pineapple residues and preparing the solid acid catalyst by using the prepared active carbon. The solid acid catalyst prepared according to the method can replace the conventional liquid acid catalyst to be used in the esterification reaction of fatty acid and short-chain alcohol and no acidy waste water is produced; and the solid acid catalyst can be recycled, and can be reused through acid regeneration after being used for a plurality of times.

The invention relates to a polymer blocked layer material for a lithium-sulfur battery and a preparation method thereof. The preparation method comprises the following steps: preparing 1-3mg / ml of N,N-dimethyl formamide of polyacrylonitrile, and preparing a nano-fiber precursor membrane by adopting an electrostatic spinning method; carbonizing the precursor membrane in nitrogen at 800-1000 DEG C to form a carbon nano-fiber membrane; dissolving natural polymer acacia gum in water to prepare a solution; directly dropwise adding the acacia gum onto the carbon nano-fiber membrane to form a carbonnano-fiber-acacia gum composite membrane; drying the composite membrane in vacuum at 60-80 DEG C for 16-24 hours to enable the composite membrane to have a thickness of 17-25mu m and mass of 0.18-0.36mg / cm<2>. By adopting the method, the excellent circulating performance that a lithium-sulfur battery has 94 percent volume after circulating for 250 times is realized, the 'shuttle effect' problem oflithium polysulfide can be relieved, and the battery shows excellent self-discharge resistance.

The invention belongs to the fields of materials and catalysis and relates to a preparation method of surface-modified g-C3N4. The preparation method comprises the following steps: firstly, creatively carrying out direct high-temperature reaction on sodium halide, potassium halide or a mixture of sodium halide and potassium halide and g-C3N4; introducing water in the reaction process and enabling the modified g-C3N4 to contain hydroxide radicals; modifying corresponding metal ions on the surface of the modified g-C3N4. The method has the characteristics of simple operation, easiness in realization, low-priced and easily-obtained reaction raw materials, environment friendliness, high yield of the modified g-C3N4 and the like; in addition, abundant hydroxide radicals and porous structures on the surface of the modified g-C3N4 surface can generate abundant hydroxyl free radicals under visible light; the characteristics lay a foundation for actual application of the modified g-C3N4 in the field of photocatalysis.

The invention discloses a method which aims at the deep treatment of dyeing wastewater and has the advantages of simple operation, low cost and no secondary pollution. The method comprises the following steps: based on the biochemical-physical and chemical treatment of the dyeing wastewater, tail water obtained after treatment is lifted by a pump and enters a static adsorption bed for filling fine coal particles, the stay time is controlled to between 2 and 4 hours, difficultly degraded organic matters in the tail water are removed by adsorption, and the discharged water meets the discharge standards and is discharged or reutilized. The method has the advantages of unnecessary addition of other chemical agents, low operational cost and no secondary pollution; the stay time is short with no more than 4 hours, and the reactor occupies small areas; the pH value of the tail water does not need to be adjusted, and the tail water after treatment can be reutilized as reclaimed water; and saturated adsorbing materials are unnecessarily regenerated, and can be continuously used as fuel.

The invention discloses an industrial sewage treatment adsorbent. The industrial sewage treatment adsorbent comprises the following raw materials in parts by weight: 30-40 parts of attapulgite, 30-40 parts of argil, 20-30 parts of expanded graphite cyclodextrin compound, 10-18 parts of bamboo charcoal, 10-20 parts of carbon nanotube, 5-10 parts of retinervus luffae fructus, 8-18 parts of adhesive, 20-35 parts of flocculant and 3-5 parts of oxidizing bactericide. According to the invention, industrial sewage treatment is performed by means of the attapulgite clay; and the industrial sewage treatment adsorbent can adsorb wastewater containing heavy metal, is high in effect and low in cost, and achieves considerable economic benefits.

The invention discloses a method for preparing biochar with catalytic activity by utilizing iron-containing excess sludge and a method for removing antibiotics, and belongs to the field of solid waste recycling and carbon material synthesis. The preparation method of the biochar comprises the following steps: carrying out dehydration and freeze thawing treatment on iron-containing excess sludge, mixing with polystyrene particles, dipping and activating with zinc chloride, then carrying out high-temperature pyrolysis in an inert atmosphere, and the like. According to the method for removing the antibiotics, the prepared biochar is adopted to activate peroxydisulfate to construct an advanced oxidation system to degrade typical antibiotics. The prepared biochar has a large specific surface area and a rich pore structure, contains a large number of iron catalytic active sites, has significantly improved efficiency in catalyzing peroxydisulfate to degrade antibiotics compared with the prior art, and has significantly reduced dosages of the biochar and an oxidizing agent. According to the invention, waste recycling can be realized, the purpose of treating waste with waste is achieved, and the method has remarkable environmental, economic and social benefits.

The invention relates to a negative electrode material of a lithium-sulfur battery and a preparation method of the negative electrode material. The negative electrode material comprises the following compositions based on mass: 5-10 parts of steady-state lithium powder, 3-7 parts of carbon material, 1 part of binding agent and a solvent. According to the preparation method, a mixture mixed by the steady-state lithium powder, carbon nanosphere / carbon nanotube and mesoporous carbon according to mass ratios of 5:2:1 is particularly selected as the carbon material in a negative electrode to prepare a negative electrode mixed paste, so that the negative electrode material of the lithium-sulfur battery has more excellent performance; the prepared battery according to the method is endowed with relatively small impedance, a shuttle effect and dendrite growth during the continuous charging / discharging process can be effectively reduced, and the battery shows batter cycle performance and rate performance than those of a conventional metal lithium foil.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a silicon-containing negative electrode material for a lithium ion battery and a preparation method of the silicon-containing negative electrode material. The negative electrode material contains silica particles, porous carbon and coated carbon. The negative electrode material comprises the following components in percentage by weight: 30%-60% of silica particles, 10%-40% of porous carbon and 10%-30% of coated carbon; the silica particles can be represented by SiOX, wherein x is greater than 0 and less than 0.5; the porous carbon material is combined with silica particles in the negative electrode material, and the formed porosity is 10%-50% by volume; the surface layer part of the negativeelectrode material is covered by a carbon layer, and the thickness of the carbon layer is 10-1000nm. Compared with the prior art, the prepared silicon-containing negative electrode material for the lithium ion battery has excellent electrochemical performance.

A preparing method and application of a MCM-41 supported CuO-CeO2 nanocrystalline catalyst are disclosed. The method includes (1) preparing a support MCM-41, and (2) preparing a CuO-CeO2 / MCM-41 catalyst. The catalyst is used for catalytic combustion of low-concentration chlorobenzene. The prepared catalyst has characteristics of small active component dimension and uniform dispersion, has high activity for catalytic chlorobenzene combustion and good durability, and is a VOD degrading catalyst having a good application prospect and excellent performance.

The invention discloses a preparation method of aluminum-iron composite microspheres which comprises the following steps: mixing and grinding aluminum hydroxide, triiron tetroxide and humic acid, adding with polyvinyl alcohol and ethanol solution and mixing, and applying spray drying to obtain aluminum-iron composite microspheres. The invention also discloses a preparation method of adsorption settling agent which comprises the following steps: mixing medical stone power, linen fiber, urea and sodium hydroxide until the mixture is neutral; filtering and cleaning the mixture with water, dryingand smashing the mixture, and then immersing the mixture in silicon dioxide suspension and mixing and drying the mixture by spray drying to obtain the prefabricated material; evenly mixing polyethylene oxide, sodium ferrate, montmorillonite, calcined kaolin, fruit shell charcoal, the prefabricated material and the aluminum-iron composite microspheres, adding active silica and sodium alginate, stirring evenly, and drying to obtain the adsorption settling agent. The invention also discloses the application of the adsorption settling agent.

The invention provides a sowing method suitable for pteridophytes in a slope restoration process. The sowing method of the pteridophytes comprises the steps as follows: step 1, immersing a polyurethane substrate in a spore suspension of pteridophytes to obtain a polyurethane substrate attached with spores; step 2, performing sowing. According to the method, the spores are adsorbed onto the polyurethane substrate, the polyurethane substrate plays two roles in the germination process of the pteridophytes: on one hand, the polyurethane substrate can provide a growth carrier for the spores and prevent the condition that the mitoplast at the initial stage of germination of spores cannot grow into young gametophytes easily due to coverage of spores with soil or other types of substrates in the sowing process, on the other hand, the good porosity structure of the polyurethane substrate can provide specific microenvironments for growth of sporophytes at the early stage, guarantee air, moisture, nutrients and the like required by growth of the sporophytes and greatly increase the survival rate of the spores.

The invention discloses structurally-adjustable 3D network-structured mesoporous manganese dioxide and a preparation method thereof. The structurally-adjustable 3D network-structured mesoporous manganese dioxide is characterized in that manganese dioxide nanosheet hinges are self-assembled to form 3D network-structured spongy or cellular porous block bodies, has the characteristics of large specific surface area (larger than 150 m<2>g<-1>), narrow pore size distribution (good aperture uniformity), small crystallization particle size and the like, and then can be applied to the super capacitor, battery, catalysis and sewage control fields. The provided preparation method has the advantages of being high in productivity, short in production period , low in equipment requirement and the like, is a mesoporous manganese dioxide preparation method which is simple in technological process, low in energy consumption, short in reaction period and low in cost, and has a huge industrial application value.

The invention relates to a negative electrode material of a lithium-sulfur battery and a preparation method of the negative electrode material. The negative electrode material comprises the following compositions based on mass: 5-10 parts of steady-state lithium powder, 3-7 parts of carbon material, 1 part of binding agent and a solvent. According to the preparation method, a mixture mixed by the steady-state lithium powder, carbon nanosphere / carbon nanotube and mesoporous carbon according to mass ratios of 5:2:1 is particularly selected as the carbon material in a negative electrode to prepare a negative electrode mixed paste, so that the negative electrode material of the lithium-sulfur battery has more excellent performance; the prepared battery according to the method is endowed with relatively small impedance, a shuttle effect and dendrite growth during the continuous charging / discharging process can be effectively reduced, and the battery shows batter cycle performance and rate performance than those of a conventional metal lithium foil.

The invention relates to an active carbon supported felted nylon biocarrier, and a preparation method and an application thereof, and belongs to the technical filed of water treatment microorganism carriers. Active carbon is uniformly bonded to the surface of a felted nylon material through a binder, or / and is bonded in the pore structure of the felted nylon material in an inlay manner, and the felted nylon material has a planar surface and has a netted porous structure. The preparation method comprises the following steps: preprocessing the felted nylon material; dipping the processed felted nylon material in a binder; and uniformly loading the active carbon onto the binder dipped felted nylon material in order to form the active carbon supported felted nylon biocarrier. The active carbon supported felted nylon biocarrier can be used in sewage treatment as a microorganism carrier.

The invention discloses biochar suitable for loading photosynthetic bacteria system rhodopseudomonas and a preparation method and application thereof. The preparation method includes the steps that biomass raw materials, ammonium bicarbonate, calcium magnesium phosphate fertilizer and phosphoric acid are mixed, swelling permeation is conducted at the temperature of 40-70 DEG C, and then carbonization is conducted at the temperature of 150-350 DEG C so that the biochar is obtained. The honeycomb structure biochar prepared by the invention is rich in charged functional groups such as hydroxyl, carboxyl, quinonyl and the like, rich in N, O and P elements, rich in pore structures and better in mechanical strength, provides an appropriate living environment for bacilus rhodopseudomonas with thewidth of 0.5-0.9 [mu]m and the length of 1.2-2.0 [mu]m, and the bacilus rhodopseudomonas can be used for repairing black and odorous water, removing organic pollutants in the water, removing nitrogenand phosphorus and restoring the self-purification capacity of the water.

The invention discloses an amino acid organic fertilizer as well as a preparation method and application thereof. The amino acid organic fertilizer is prepared from the following raw materials: wet garbage, sewage, soybean meal, fish meal, humic acid, bacillus, coconut shell and monopotassium phosphate. Amino acid compounds in the wet garbage are extracted, so that the amino acid in the wet garbage is fully utilized; and residues which are obtained after the amino acid is extracted from the wet garbage and the sewage are combined and fermented to prepare the organic fertilizer, the quality of the sludge serving as the organic fertilizer is improved, and the purposes of sewage and garbage treatment and application are achieved. The amino acid organic fertilizer can be applied to foliar fertilizer spraying, fertigation and soilless culture.

The invention discloses a bio-organic fertilizer and a preparation method thereof. The bio-organic fertilizer comprises the following raw materials in percentage by weight: 10-20% of straw carbon and 80-90% of base fertilizer; the base fertilizer comprises the following components in percentage by weight: 90-95% of fermented poultry manure, 2.5-5% of molasses and 2.5-5% of microbial beneficial bacteria. The invention relates to the technical field of organic fertilizer preparation. According to the bio-organic fertilizer and the preparation method thereof, by using the straw biomass fertilizer, the proportion of soil organic matter, carbon, nitrogen, phosphorus and potassium is effectively increased, and the prepared biochar organic fertilizer is alkaline, can regulate slightly acidic soil, has strong adsorption capacity on heavy metal ions and organic pollutants, the bio-organic fertilizer is widely applied to soil pollutant remediation, soil improvement and crop yield increase, meanwhile, the preparation method of the bio-organic fertilizer is simple and easy to implement and convenient to popularize.

The invention discloses a root division zone drip irrigation system for agricultural non-point source sewage purification and application thereof. The root division zone drip irrigation system comprises a conical water pool, a coupling type micro-power water quality purifier and a claw type drip irrigation device, the conical water pool communicates with a rural non-point source sewage pipeline through a water inlet pipe, the coupling type micro-power water quality purifier is arranged in the conical water pool, and the claw type drip irrigation device communicates with a clear water pool in the center of the conical water pool. During use, rural non-point source sewage flows into the conical sewage pool through the water inlet pipe to be purified, purified water conducts root division zone irrigation on crops through the claw type drip irrigation device, the drip irrigation system is ingenious in structure, energy-saving and environment-friendly, accurate water-saving drip irrigationcan be achieved, and it is guaranteed that root systems of the crops are evenly distributed and grow; and the system has the characteristics of low operation energy consumption, simple operation, environmental protection, high efficiency, improvement of sanitary conditions of rural areas, and beautification of rural environment.

The invention belongs to the field of materials and catalysis and relates to a surface-modified g-C 3 N 4 preparation method. For the first time, sodium halide, potassium halide or mixtures of these salts were creatively combined with g‑C 3 N 4 Carry out high-temperature reaction, and introduce water during the reaction process, so that the modified g‑C 3 N 4 Contains hydroxyl groups and in modified g‑C 3 N 4 Surface modification with corresponding metal ions. This method is not only simple to operate, easy to implement, cheap and easy to obtain reaction raw materials, environmentally friendly, and modified g‑C 3 N 4 It has the characteristics of high yield and modified g-C 3 N 4 The abundant hydroxyl groups and rich pore structure on the surface can generate abundant hydroxyl radicals under visible light. These characteristics are modified g‑C 3 N 4 It has laid the foundation for practical applications in the field of photocatalysis.

The invention discloses a preparation method of a covalent organic framework / carbon nitride composite material and application thereof. Firstly, a covalent organic framework material is synthesized byusing p-phenylenediamine and triformyl phloroglucinol as synthetic monomers through a room-temperature solid-phase method, then the covalent organic framework material and carbon nitride are mixed, stirred and dried in methyl alcohol, and pyrolysis is carried out under the protection of inert gas to obtain a target product. The covalent organic framework / carbon nitride composite material disclosed by the invention is large in specific surface area, high in nitrogen doping amount and rich in pore structure and can effectively remove toxic organic pollutants in water by constructing a novel Fenton-like system, and new application of the covalent organic framework material in the field of catalysis is expanded; unavoidable metal ion leaching in the activating process of a metal nano catalystis overcome; and the preparation method has the advantages of simple process, easiness for repeated operation, controllable structure, suitability for large-scale production and the like.

The invention discloses a preparation method of butterfly-tie-shaped cerium dioxide, and relates to the preparation method of the cerium dioxide. The preparation method aims to solve the technical problems that the morphology of the cerium dioxide prepared by preparation methods in the prior art is mainly rod-shaped, line-shaped, tube-shaped and spherical. The preparation method comprises the following steps: first, mixing Ce(NO3)3.6H2O and L-cysteine, adding into distilled water and stirring until the Ce(NO3)3.6H2O and the L-cysteine are completely dissolved, then adding NaOH, and continuing to stir for 30 min to obtain a mixed liquid; and second, transferring the mixed liquid into a reaction kettle for reaction, naturally cooling to the room temperature, washing a sample with the distilled water until the sample being free of impurity, filtering, drying, and then calcining, thus obtaining the butterfly-tie-shaped cerium dioxide. The butterfly-tie-shaped cerium dioxide prepared by the preparation method is butterfly-tie-shaped, and both ends of the butterfly-tie-shaped cerium dioxide are bound-branch-shaped, the sample has complete morphology, the size is about 18 [mu]m, the size distribution is uniform, both ends of the sample are multilevel structures, and have pore structures. The preparation method belongs to the field of preparation of oxides.

The invention relates to the technical field of biochar preparation, in particular to a preparation method of ferromagnetism-rich biochar and application of the ferromagnetism-rich biochar in adsorption of heavy metal pollution. And immersing the magnetic biochar in a FeCl3 solution, adjusting the pH value of the system to 7-12 under a stirring condition, standing at room temperature for 24-36 hours, filtering, and drying to obtain the ferromagnetism-rich biochar. The modified biochar provided by the invention can realize synchronous and stable remediation of soil heavy metal Cd-As combined pollution. The modified biochar is higher in applicability, and the ferromagnetism-rich biochar still has a better stabilizing effect on Cd-As under the condition of different water contents of soil; after freezing and thawing, the effective state content of Cd-As in the soil can still be reduced by more than 30%.

The invention discloses a method for in situ fixation of vanadium ore polluted soil by modified charcoal and belongs to the technical field of soil in-situ remediation. The method comprises the following steps: 1, after harvested plants in vanadium ore polluted sites are pretreated, the pretreated plants are subjected to pyrolysis at 450-550 DEG C under the nitrogen protection, the pyrolysis time lasts for 30 min, then nitrogen is introduced continuously, the mixture I is cooled to room temperature to obtain solid particles, and the solid particles are cleaned and then dried at 60 DEG C to obtain charcoal particles for standby application; 2, calcium hydrophosphate is dissolved in dilute nitric acid with the mass concentration being 5%, calcium hydrophosphate and the dilute nitric acid are sufficiently mixed according to the the molar ratio of (1-3):1; 3, the charcoal particles are added in a calcium hydrophosphate-nitric acid mixing system according to the fact that 1 g of charcoal particles are added into 40-60 ml of calcium hydrophosphate-nitric acid mixing system, and ultrasonic treatment is performed for 20 min; 4, the mixture II is filtered, and the filtered substance is cleaned and dried at 55 DEG C to obtain modified charcoal; 5, the modified charcoal is sufficiently mixed with soil samples at the mass ratio of 1%-3%, the soil field capacity is kept to be 60%, and maintenance is carried out for 30 days. A soil leaching experiment result shows that compared with the leaching toxicities of heavy metals namely V, Cr and Pb of soil which is not fixed by modified charcoal, the leaching toxicities of heavy metals namely V, Cr and Pb of the soil fixed by modified charcoal are respectively reduced by 70%, 50% and 35%.

The invention relates to the technical field of cigarettes, in particular to a tobacco additive and the application thereof. The tobacco additive is prepared from the following raw materials in partsby weight: 8-45 parts of propylene glycol and vegetable glycerol, and 1-5 parts of tobacco extract. The tobacco additive provided by the invention effectively inhibits the sweet greasy feeling of smoke caused by the addition of PG and VG, greatly enhances the smoking taste, and improves the fragrance during smoking. Therefore, the smoke is softer.