32results about How to "Achieve Adsorption Removal" patented technology

The invention discloses a purification method of graphene oxide and the graphene oxide. The purification method of the graphene oxide comprises the following step: performing ionic exchange purification, namely, passing a graphene oxide solution through cation exchange resin and anion exchange resin in sequence, wherein the cation exchange resin is hydrogen type cation exchange resin; the anion exchange resin is hydrogen-oxygen type anion exchange resin. The purification method disclosed by the invention has the advantages of simplicity of operation and high purification efficiency, the content of each metal impurity in the purified graphene oxide is less than 10ppm, and in addition, the used ionic exchange resin can be regenerated and repeatedly used, thus achieving energy-saving and environment-friendly effects.

The invention discloses a method and a device for recycling oil products of a scrapped car. The method comprises the following steps of: collecting waste engine oil in the scrapped car, preparing activated clay, pretreating waste engine oil, pickling and settling the waste engine oil, blending and distilling the waste engine oil and the activated clay, filtering the distilled waste engine oil and the like. The device comprises a pickling and settling tank, a distilling kettle and a plate-and-frame press filter which are connected sequentially. The method provided by the invention only needs continuous primary settlement-activated clay distilling, and then the recycled oil requirement is reached through filtering, and the operation working procedures are reduced greatly; and the distilling and clay blending are combined into a working procedure, the consumption of the activated clay can be reduced obviously, and the recycled oil yield is improved by 10-15%. The periphery of the settling tank is provided with a temperature preservation layer, the oil products in the whole settling period can be at the ideal state, the annular flow of the settled oil caused by the temperature difference between the external environment and the oil is prevented, and a better settling effect can be achieved.

The invention discloses a preparation method of an ion chelating agent containing polydopamine and an obtained product. The method comprises the following steps: taking magnetic ferroferric oxide microspheres as a core material, and forming a polymer core-shell structure through surface modification and dopamine monomer polymerization; and introducing dithiocarbamate with strong heavy metal ion adsorption and chelation performance into the magnetic core-shell microsphere polymer. The obtained ion chelating agent has magnetism and strong adsorption action chelating sites, is high in adsorption capacity, good in acid / alkali resistance, convenient to operate and good in heavy metal ion separation effect, can achieve rapid treatment in the field of heavy metal ion pollution, and has huge application potential.

The invention provides a modified carbon nanotube as well as a preparation method and application thereof, and belongs to the field of advanced wastewater treatment. According to the material, rare earth lanthanum ions are grafted to the two ends of an acidified carbon nanotube through an ultrasonic-assisted precipitation method, the positive charge quantity of the lanthanum ion-loaded carbon nanotube is increased, and the adsorption effect on nitrate nitrogen in a water body is enhanced. Then the surface of the carbon nano tube is coated with the cationic surfactant through electrostatic interaction, and the hydrophobic characteristic of the carbon nano tube can be enhanced through semispherical semi-micelles formed by the cationic surfactant, so that the purpose of weakening the interference of water molecules on nitrate nitrogen adsorption is achieved. The modified carbon nanotubes have an excellent adsorption effect on nitrate nitrogen in sewage and are especially suitable for advanced treatment and recycling technologies of biochemical tail water with low nitrate nitrogen concentration. The invention have the advantages of high denitrification efficiency, simple and easy-to-operate preparation process, mild and easy-to-control reaction conditions and the like, and have good economic and environmental benefits.

The invention relates to a preparation method of an adsorbent for complexing heavy metals in water. The preparation method comprises the following steps: crushing a biomass raw material to 20-100 meshes, and carrying out heat treatment at 270-500 DEG C under the protection of nitrogen; carrying out violent stirring and soaking treatment with a 0-2 mol / L KOH solution, washing with deionized water to be neutral, and drying; treating at a temperature of 40-90 DEG C according to a ratio of a biological material to dimethylformamide to 30% NaOH to epichlorohydrin of 3 g to 10-30 mL to 0-10 mL to 5-20 mL; reducing the temperature to 30-40 DEG C, slowly adding 2.5-10 mL of diethylenetriamine or triethylenetetramine in a dropwise manner, and treating; adding absolute ethyl alcohol and CS2 into thesample subjected to suction filtration treatment with a proper amount of acetone, ethyl alcohol and deionized water, and treating under an ice-water bath condition; and finally repeatedly washing thesuction filtration sample with deionized water, and drying at 40 DEG C. The prepared adsorbent for complexing heavy metals has the advantages of strong specific surface area, strong chelating capability, easily available materials, rich resources, convenience use, simple operation, no requirement of additional separation process, mild preparation conditions, easy in batch production and the like.

The invention provides preparation and application of a modified nano-hydroxyapatite adsorbing material. The coupling effect of a magnetic stirrer and ultrasound is utilized to ensure that hydroxyapatite can be completely integrated into nanometer titanium dioxide dispersion, by controlling the parameters such as water bath refluxing time, a drying temperature and the reaction pH, the rate of loading of nanometer titanium dioxide by nano-hydroxyapatite is increased, and then the novel adsorbing material capable of simultaneously adsorbing various heavy metal ions and with a high adsorption rate is obtained, so that adsorption and removal of the heavy metal ions in soil are realized.

The invention discloses a preparation method of a pyridine-functionalized sodium alginate adsorbent. The preparation method comprises the following steps: S1, preparing mixed mother liquor of sodium alginate and polyamine from polyethyleneimine and sodium alginate; S2, dropwise adding epoxy chloropropane into the mixed mother liquor obtained in the step S1, and carrying out a cross-linking reaction to obtain mixed cross-linked mother liquor; S3, dropwise adding the mixed cross-linked mother liquor obtained in the step S2 into a coagulating bath, and conducting precipitating and coagulating toobtain composite microspheres; S4, extracting the composite microspheres in the step S3 through a Soxhlet extractor; and S5, putting the microspheres obtained in the step S4, 2-chloromethylpyridine hydrochloride and sodium carbonate into an aqueous solution of ethanol, carrying out a stirring reaction in an oil bath, washing the obtained microspheres until the microspheres are neutral, and conducting dehydrating to obtain the pyridine-functionalized sodium alginate adsorbent. The adsorbent prepared by using the method has many nitrogen-containing functional group adsorption sites and a large pore size, and multiple nitrogen atoms on pyridyl and amido groups can play a role in coordination and chelation of heavy metals and exert hydrogen bonds, ion exchange and the like on antibiotics.

The invention discloses a method for synchronously removing heavy metals and nitrates in mine wastewater and a reactor. The method comprises the following steps: sludge enrichment and domestication, preparation of a biological agent, preparation of a double-layer iron-carbon filler, biofilm formation and operation of the reactor. The reactor comprises a double-layer iron-carbon filler, a gas washing plate, a guide plate, a supporting layer, an outlet aeration system and a filter plate from top to bottom, a backwash valve is arranged at the bottom of the reactor, a backwash water tank controls the flow through a backwash flowmeter, and a water inlet pump pumps water to cooperate with a gas washing plate to realize backwash; two exhaust holes are formed in the top of the reactor; and water is discharged from the water outlet and then enters a sedimentation tank for sedimentation and drainage. A double-layer iron-carbon filler is adopted, nitrate is removed under the effect of microorganisms, microorganism precipitates (FeOOH, Fe2O3 and Fe (OH) 3) are generated to adsorb and remove Cd < 2 + >, Pb < 2 + > and Ni < 2 + >, and the method has the advantages of being free of secondary pollution, high in biological activity, low in cost, easy to operate and manage and the like.

The invention belongs to the technical field of environmental remediation materials, and relates to enteromorpha hydrogel for rapidly removing pollutants as well as a preparation method and application of the enteromorpha hydrogel, the preparation method comprises the following steps: (1) removing impurities from enteromorpha, cleaning, freeze-drying, crushing, screening with a 90-120-mesh screen to obtain large-particle-size enteromorpha powder, and screening with a 300-500-mesh screen to obtain small-particle-size enteromorpha powder; (2) dissolving chitosan in an acetic acid aqueous solution, adding the large-particle-size and small-particle-size enteromorpha powder into the acetic acid aqueous solution, and stirring to obtain a mixed solution; (3) dropwise adding a cross-linking agent into the mixed solution while stirring, and freeze-drying after gel is formed; and cleaning to obtain the enteromorpha gel. The high-strength enteromorpha hydrogel is prepared by interpenetrating network crosslinking of enteromorpha with different particle sizes and a natural biological material chitosan, and a new composite material is provided for removal of pollutants; the method can be used for removing methyl orange dye in a water environment; meanwhile, the problems that existing enteromorpha is difficult to utilize, deep processing is needed in the preparation process and the like are solved.

The invention discloses a method for treating heavy metal ions in a water body, which comprises the following step of: adding a heavy metal ion adsorbent into the water body to adsorb and remove the heavy metal ions in the water body. The preparation method of the heavy metal ion adsorbent comprises the following steps: modifying ascorbic acid on the surfaces of ferroferric oxide microspheres, then carrying out surface modification by using a silane coupling agent KH550, and finally reacting with sodium hydroxide and carbon disulfide to introduce sodium dithiocarbamate with strong adsorption chelation performance on the surfaces of the microspheres, thereby obtaining the heavy metal ion adsorbent. The heavy metal ion adsorbent has both magnetism and chelating sites with a strong adsorption effect, is simple to synthesize, can be conveniently operated, realizes adsorption separation of heavy metal ions Cu<2+>, Cd<2+>, Ni<2+>, Hg<2+> and the like within a short time, can realize rapid treatment in the field of heavy metal ion pollution, and has huge application potential.

The invention discloses a drying device for processing trichosanthes kirilowii maxim seeds. The drying device comprises a drying box body. Supporting legs are fixed to the four corners of the bottom face of the drying box body. A shaking disc is arranged in the drying box body, and supporting strips are arranged on the two sides of the lower end of the shaking disc; rolling grooves are formed in the top surfaces of the supporting strips; balls are further installed on the bottom face of the shaking disc. The balls are connected into the rolling grooves in a rolling mode. A heating pipe is further arranged on the lower side of the shaking disc; one side of the bottom surface of the drying box body is in through connection with a discharging vessel; push rods are fixed to the two sides of the rear end face of the shaking disc. Limiting plates are fixed to the side walls of the rear ends of the push rods. Reset springs are fixed to the ends, close to the drying box body, of the limiting plates. Racks are fixed to the center positions of the rear end faces of the limiting plates. The invention is reasonable in design, stable in device operation, uniform in trichosanthes kirilowii maxim seeds heating and high in drying efficiency, light impurities can be adsorbed and removed while stir-frying is conducted, and therefore the stir-frying quality of trichosanthes kirilowii maxim seeds is greatly improved.

The present invention provides an ultrafiltration / microfiltration membrane comprising a matrix filter membrane and a sulfhydryl-modified polydopamine membrane layer deposited on the surface of the matrix filter membrane, wherein the surface of the sulfhydryl-modified polydopamine membrane layer is chemically bonded with free sulfhydryl groups. The sulfhydryl-modified polydopamine membrane layer isdeposited on the surface of the matrix filter membrane, the adsorption and removal of patulin in liquid containing patulin such as fruit juice can be effectively realized, the adsorption capacity canreach 30[mu]g / cm<2>, which solves the problems of residual adsorbents, low removal efficiency and difficult industrial application in the traditional separation process of patulin.

The invention provides a modified carbon nanotube and its preparation method and application, belonging to the field of advanced wastewater treatment. The material is made by grafting rare earth lanthanum ions to both ends of acidified carbon nanotubes through ultrasonic-assisted precipitation method. The carbon nanotubes loaded with lanthanum ions increase the positive charge and strengthen the adsorption effect on nitrate nitrogen in water. Then the cationic surfactant is coated on the surface of carbon nanotubes through electrostatic interaction, and the hemispherical hemimicelle formed by the cationic surfactant can enhance the hydrophobic characteristics of carbon nanotubes, so as to weaken the interference of water molecules on the adsorption of nitrate nitrogen the goal of. The modified carbon nanotubes have excellent adsorption effect on nitrate nitrogen in sewage, and are especially suitable for the advanced treatment and reuse technology of biochemical tail water with low nitrate nitrogen concentration, and the present invention has high denitrification efficiency and simple preparation process It has the advantages of easy operation, mild reaction conditions and easy control, and has good economic and environmental benefits.

The invention discloses a composite material for treating heavy metal ions in wastewater and a preparation method thereof. The method includes: taking polyamide fiber and sulfur modified bamboo fiberas the raw materials, firstly performing blending into a fiber net, then utilizing triethylene diamine for amino modification on the fiber net to obtain a modified fiber net; and finally, placing themodified fiber net in a bacterial cellulose fermentation medium, inoculating acetobacter xylinum, and conducting fermentation and aftertreatment to obtain the composite material for wastewater treatment. The composite material is suitable for heavy metal wastewater treatment, and adsorption and removal of various heavy metal ions can be achieved in a short time.

The invention discloses a preparation method of a pyridine functionalized sodium alginate adsorbent, comprising the following steps: S1: using polyethyleneimine and sodium alginate to prepare a mixed mother liquor of sodium alginate and polyamine; S2: mixing epoxy chloride Propane is added dropwise to the mixed mother liquor obtained in step S1, and a crosslinking reaction is carried out to obtain a mixed crosslinked mother liquor; S3: the mixed crosslinked mother liquor obtained in S2 is added dropwise to a coagulation bath, and composite microspheres are obtained by precipitation and solidification; S4: the composite microspheres in step S3 are extracted through a Soxhlet extractor; S5: the microspheres obtained in S4, 2-chloromethylpyridine hydrochloride and sodium carbonate are placed in an aqueous solution of ethanol, in The reaction was stirred in an oil bath, the obtained microspheres were washed until neutral, and dehydrated to obtain a pyridine functionalized sodium alginate adsorbent. The adsorbent prepared by the above method has more nitrogen-containing functional groups, more adsorption sites, and larger pore size. Multiple nitrogen atoms on the pyridyl and amine groups can coordinate and chelate heavy metals, and generate hydrogen bonds and ion exchanges for antibiotics. And so on.

The invention discloses a method and a reactor for synchronously removing heavy metals and nitrates in mine wastewater. The steps include: sludge enrichment and domestication, preparation of biological inoculants, preparation of double-layer iron-carbon fillers, biological film formation and reactor operation. The reactor includes top-down double-layer iron-carbon packing, air wash plate, guide plate, support layer, outlet aeration system and filter plate; a backwash valve is set at the bottom of the reactor, and the backwash water tank passes the backwash flow rate. The flow meter is used to control the flow, and the water inlet pump cooperates with the air wash plate to realize backwashing; there are two exhaust holes on the top of the reactor; after the water is discharged from the water outlet, it enters the sedimentation tank for sedimentation and drainage. The double-layer iron-carbon filler used in the present invention removes nitrate under the action of microorganisms, and generates microbial precipitation (FeOOH, Fe 2 O 3 , Fe(OH) 3 ) to achieve the Cd 2+ , Pb 2+ and Ni 2+ It has the characteristics of no secondary pollution, high biological activity, low cost and simple operation and management.

The invention discloses a composite material for treating heavy metal ions in wastewater. The composite material is prepared by the following steps of: by using polyamide fibers and sulfur-modified bamboo fibers as raw materials, blending the raw materials to form a fiber net; carrying out amino modification on the fiber net by using triethylene diamine to obtain a modified fiber net; putting themodified fiber net into a bacterial cellulose fermentation culture medium; carrying out acetobacter xylinum inoculation, fermenting and after-treatment to obtain the composite material for wastewatertreatment. The composite material is suitable for heavy metal wastewater treatment and can adsorb and remove various heavy metal ions in a short time.

The invention relates to the technical field of water pollution treatment. In order to solve the problem that the effect of adsorbing and removing heavy metals from tap water is non-ideal, the invention provides a method for preparing a harmful heavy metal adsorbent by utilizing an active polysaccharide of Kocuria. The method comprises the following steps: (1) culturing strains, namely, inoculating the selected Kocuria strains into a microbial medium to form a bacteria solution, and culturing the selected strains in the bacteria solution; (2) extracting a flocculant, namely, concentrating thecultured bacteria solution, performing dialysis and centrifugal separation, and extracting to obtain the microbial flocculant; and (3) preparing an adsorbent, namely, dissolving the microbial flocculant in a mixed aqueous solution of agar and starch, and preparing to obtain the harmful heavy metal adsorbent after the solution is solidified. The method disclosed by the invention is simple in overall steps; both the preparation efficiency and the yield are high; and the prepared adsorbent has the advantages of safety and harmlessness, can be directly added into drinking water to adsorb and remove harmful heavy metal components, and has high adsorption efficiency and good adsorption effect on the harmful heavy metal components.

The invention discloses a water purifier filter core, which comprises a shell and a filter body, wherein the shell is provided with a first water flow interface and a second water flow interface, the filter body is contained in the shell and comprises an exchange membrane and a central tube, the exchange membrane is installed on the outer side of the central tube in a winding mode, the inner wall of the shell and part of the exchange membrane form a first cavity, the second water flow interface is connected with the first cavity, the first water flow interface is connected with a second cavity formed by the central tube, wherein the filter body further comprises a physical interception layer, and the physical interception layer is arranged on the inner side or the outer side of the exchange membrane and is used for filtering impurities in water flow.

The invention relates to the technical field of water pollution treatment. In order to solve the problem of unsatisfactory adsorption and removal of heavy metals in existing tap water, the invention provides a method for preparing a harmful heavy metal adsorbent by using the active polysaccharide of Cochlear bacteria. The method comprises the following steps: 1) cultivating bacterial strains: inoculating selected Cochlear bacteria into microbial culture liquid to form bacterial liquid, and cultivating the selected bacterial strains in the bacterial liquid; Concentration, dialysis and centrifugation are carried out to extract the microbial flocculant; 3) preparation of adsorbent: the microbial flocculant is dissolved in the mixed aqueous solution of agar and starch, and the harmful heavy metal adsorbent is obtained after solidification. The overall steps of the method of the present invention are simple, and the preparation efficiency and yield are high; the prepared adsorbent has the advantages of being safe and harmless, and can be directly added to drinking water to realize the adsorption and removal of harmful heavy metal components, and has no harmful effects on heavy metals. High component adsorption efficiency and good adsorption effect.

The embodiment of the invention discloses an environment-friendly double-acting deoiling device for a residential public flue and relates to the technical field of lampblack treatment devices. The device comprises a mounting wall body, an oil fume suction hood is mounted on one side of the mounting wall body, an oil fume guide pipe is fixedly connected to the top of the oil fume suction hood, an oil fume treatment box is fixedly arranged on the other side of the mounting wall body, a connecting pipeline is fixedly arranged at the top of one end of the oil fume treatment box, the oil fume guidepipe is fixedly communicated with the connecting pipeline, and a closed baffle is fixedly arranged in the middle of the oil fume treatment box. According to the invention, atomized oil in oil fume isadsorbed by an oil fume adsorption wire, the adsorbed oil drops into a guide groove to realize adsorption removal of the oil, and the subsequently treated gas is filtered and purified when passing through a gas treatment connecting cylinder, so that the oil stain in the oil fume is conveniently and quickly separated and discharged, the oil fume treatment efficiency is improved, and the treatmentquality of the oil fume is improved by utilizing the combined treatment of adsorption and filtration.

The invention discloses a lanthanum-carbon composite adsorbent doped polyvinylidene fluoride phosphorus removal film, which is suitable for the field of water treatment, and comprises a lanthanum-carbon composite adsorbent with the mass percent of X and polyvinylidene fluoride with the mass percent of Y, X is more than 0 and less than or equal to 30 percent, and Y is more than or equal to 70 percent and less than 100 percent. The preparation method of the polyvinylidene fluoride phosphorus removal membrane comprises the following steps: (a) adding polyvinylidene fluoride and a lanthanum-carboncomposite adsorbent into N-methyl pyrrolidone, and fully stirring to obtain a uniform membrane casting solution; and (b) performing standing on the membrane casting solution, removing bubbles in vacuum, blade-coating a glass plate with the membrane casting solution, placing the glass plate in air for 25-35 seconds, immersing the glass plate in an ethanol solution, curing to form a membrane, and removing the membrane from the glass plate.

The invention provides a process for treating pharmaceutical intermediate chemical waste water. First, N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane and polyethyleneimine are used as raw materials to prepare a modifier; Then use calcium chloride, zinc chloride and yttrium acetylacetonate as raw materials to make metal oxide nanoparticles, and then add the metal oxide nanoparticles to an aqueous solution of p-toluenesulfonic acid with a mass concentration of 60-65%, heat, and add orthosilicic acid Ethyl ester and modifier, slowly add toluene dropwise while stirring to obtain a gel; then add the gel and carboxypolystyrene microspheres to the acrylic acid premix, polymerize, wash with toluene, and obtain the filler; finally put the filler into CASS In the pool, the pharmaceutical intermediate chemical wastewater is passed into the CASS pool for aerobic biochemical treatment. The invention can realize effective treatment of high-concentration pharmaceutical intermediate waste water through simple CASS pool treatment, and the treatment method is simple and efficient.

The invention discloses a method for purifying graphene oxide and graphene oxide. The graphene oxide purification method comprises the following steps: ion exchange purification: passing the graphene oxide solution through a cation exchange resin and an anion exchange resin in sequence; the cation exchange resin is a hydrogen type cation exchange resin, and the anion exchange resin is a hydroxide type anion exchange resin. The purification method provided by the present invention has the advantages of simple operation and high purification efficiency. In the purified graphene oxide, the content of each metal impurity is less than 10ppm; in addition, the used ion exchange resin can be reused through regeneration, which is energy-saving and environmentally friendly. .

The invention relates to a method for treating pesticide wastewater by recycling of a graphene-based adsorbing material. The corresponding adsorbing material is prepared by utilizing the characteristic that graphene and a derivative of the graphene contain a large number of movable Pi-electrons and a large specific surface area to adsorb related pesticide pollutants, and recycling of the graphene-based material is realized. The method provided by the invention provides the clean and efficient novel adsorbing material for treatment of the wastewater containing the pesticide pollutants.

The invention discloses a preparation method of a nickel-based underwater ammonia nitrogen adsorbent. The nickel-based underwater ammonia nitrogen adsorbent is prepared from municipal sludge, chitosan, sodium tripolyphosphate, rice husk, sodium metaaluminate, nickel nitrate and other raw materials. Hydrothermal carbon adopting a developed pore structure is obtained through hydrothermal carbonization of the municipal sludge, and in combination with the polyfunctional chitosan and through crosslinking by the sodium tripolyphosphate, on one hand, a network structure is formed to compensate for the defect of low porosity of the chitosan, and on the other hand, the mass transfer resistance can be reduced and adsorption of ammonia nitrogen in water is facilitated; and meanwhile, mayenite is prepared from calcium hydroxide and aluminum hydroxide, and through compounding with a nickel-based catalyst, a free oxygen structure therein is used for improving the carbon deposition resistance of thenickel-based catalyst, so that the catalytic performance is enhanced and the purpose of rapidly degrading and treating an adsorbate is achieved. The finally obtained multi-component adsorbent has stable physical and chemical properties, a large number of adsorption sites and large adsorption capacity, can effectively achieve adsorptive removal of the ammonia nitrogen in the water, and provides a favorable technical support for water pollution control.

Provided is a preparation method for diatomite modified exfoliated graphite. Diatomite, aluminum hydroxide, phosphoric acid and N,N-dimethylacetamide after purification are mainly adopted as main reagents, and deionized water is added to the main reagents to prepare modified exfoliated graphite slurry; the modified exfoliated graphite slurry and exfoliated graphite are dried after subjected to ultrasonic impregnation treatment for 30 minutes, sintered at the temperature of 450 DEG C through a high-temperature electric resistance furnace and subjected to heat preservation for one hour, the high-temperature electric resistance furnace is closed and naturally cooled to the indoor temperature, the mixture is dipped, cleaned and dried, and the diatomite modified exfoliated graphite is prepared and is sealed and stored in a plastic bag. The method has the advantages of being easy to operate and low in cost. The diatomite modified exfoliated graphite can effectively achieve adsorption and removal of polar and nonpolar oil pollutants, and the method has a good effect in boosting development of oily water treatment and ocean oil spill pollution disposal work.