215results about How to "Improve adsorption removal effect" patented technology

The invention belongs to the field of synthesis of nano materials, relates to the preparation of graphene/mesoporous oxide series of nano composite material, and particularly relates to a preparation method and application of graphene/cellulose/titanium dioxide composite material. The graphene/cellulose/titanium dioxide composite material is prepared by preparing graphite oxide by utilizing an improved Hummers method, carrying out ultrasound to obtain graphene oxide, reducing graphene oxide into graphene by using sodium borohydride; and finally uniformly mixing cellulose, titanium dioxide, a surface active agent (hexadecyl trimethyl ammonium bromide) and grephene. According to the invention, the synthesis method is simple, the prepared graphene/cellulose/titanium dioxide composite material is taken as an adsorbent, and a malachite green dye solution is taken as an adsorption object, the experiment shows that the composite material has an excellent adsorption removal effect. The composite material is applied to the treatment of dyes in sewage water, has the advantages of simplicity in operation, convenience, easiness in availability, high adsorption rate and the like, and has good industrially practical value.

The invention discloses a method for modifying natural zeolite powder, which uses an inorganic alkali and sodium chloride as modification medicaments to modify the natural zeolite powder by a solution soaking method. The method comprises the following steps: firstly, mixing the natural zeolite powder and the sodium chloride, soaking the mixture in sodium hydroxide solution for an adsorption reaction, washing the product of the absorption reaction with water till the pH value of the product is neutral after the reaction is finished; and secondly, drying the product of the absorption reaction to obtain modified zeolite powder. The modification method of the invention avoids the use of organic acids and the production of toxic and harmful substances, effectively prevents low-concentration ammonian pollution of the raw water of drinking water without changing the prior drinking water treatment process, does not change the pH value of the raw water after being used, does not exert influence on the subsequent processes, and improves the ammonian adsorption performance of the modified zeolite powder by 30 to 80 percent.

The invention discloses a modified zeolite as well as a preparation method and application thereof. The modified zeolite is prepared by mixing, roasting and cooling natural zeolite and magnesium oxide. Particularly, the preparation method comprises the steps of: taking natural zeolite and magnesium oxide as raw materials; mixing the natural zeolite and the magnesium oxide in mass ratio of (3-6): 1; roasting at a constant temperature of 100-600 DEG C for 2-6h; and naturally cooling to obtain the modified zeolite. The modified zeolite can be applied to the pre-treatment process of removing ammonia nitrogen in biological treatment aquaculture wastewater and used as an adsorbent for adsorbing the high-strength ammonia nitrogen in the aquaculture wastewater. The modified zeolite is strong in ability of adsorbing ammonia nitrogen, good in ammonia nitrogen adsorption effect, low in preparation cost, environmental-friendly and regenerative.

The invention relates to an efficient discoloring agent and a discoloring treatment method of printing and dyeing wastewater. The efficient discoloring agent of the printing and dyeing wastewater comprises the following components in parts by mass: 100 parts of diatomite, 15-25 parts of active carbon, 5-10 parts of ferrate, 10-20 parts of iron oxide, 10-20 parts of ferric chloride, 32-55 parts of calcium sulfate, 20-50 parts of aluminum sulfate, 2.5-5 parts of an organic flocculant and 25-50 parts of cement. The discoloring treatment method of printing and dyeing wastewater comprises the following step: directly adding the efficient discoloring agent of the printing and dyeing wastewater into to-be-treated printing and dyeing wastewater, stirring while adding, and separating by using a superconductive magnetic separating device. The efficient discoloring agent can be used for quickly removing hydrophobic dyes and hydrophilic dyes in the printing and dyeing wastewater, is good in discoloring effect, can be directly added without being dissolved, is simple and convenient to operate, capable of realizing good magnetic separating effect in case of not additionally adding magnetic seeds, and low in treatment cost.

The invention relates to a mould biosorbent and a preparation method thereof, belonging to the field of environment governance. The biosorbent is mycelial pellets formed by winding mould mycelia, wherein the diameter thereof is about 2.0mm, and the mycelial pellets have uniform size and certain mechanical strength. The preparation method comprises the following steps: taking food production waste water as a culture medium, inoculating a mould spore suspension under the sterilized or non-sterilized condition of pH 3.5-6.5, shaking culturing for 60-72h at 28-35 DEG C and at the speed of 150-200rpm, and filtering the collected mycelial pellets to obtain the mould biosorbent. The mould biosorbent prepared in the invention has low cost and simple preparation process, has good adsorbing and decoloring effects on reactive dyes, reducible dyes, disperse dyes, direct dyes, sulfur dyes and the like, can also be used for removing metal ions in the waste water, and has the characteristics of economy, high efficiency, easy solid-liquid separation, no secondary pollution, capability of recovering the metal ions, environment friendliness and the like.

The invention relates to a resin-based composite adsorbent for synchronously and deeply remove phosphorus and fluorine in water and a preparation method thereof. The preparation method includes: weighing resin, adding the resin into a prepared titanium tetrachloride-hydrochloric acid-anhydrous alcohol solution, stirring in constant-temperature water bath, filtering, drying, adding a prepared NaCl+NaOH solution, stirring, filtering, cleaning, rinsing, and drying; weighing zirconium oxychloride, adding into a a hydrochloric acid-alcohol-water solution, adding the resin which is dried to constant weight, stirring in water bath, filtering, drying, adding into a NaOH solution, stirring, filtering out, washing with water to neutral, using a NaCl solution and alcohol for rinsing, filtering, and drying to constant weight to obtain the resin-based composite adsorbent. A carrier of the adsorbent is macroporous anion exchange resin with quaternary ammonium functional group, and nanoparticles of titanium oxide and zirconium oxide are distributed on the surface and in pores of the carrier; the composite adsorbent has the advantages of high adsorption capacity, high selectivity and capability of synchronously removing phosphorus and fluorine and can be applied in deep phosphorus and fluorine removing treatment of drinking water and industrial wastewater.

The invention discloses application of KOH activated active carbon to removing antibiotics in water body through adsorption. The invention is characterized in that the KOH activated active carbon is prepared from KOH and active carbon under high temperature and is used as an adsorbent. In the invention, the polluted water containing antibiotics is treated. Under room temperature, the KOH activated active carbon shows high antibiotics adsorption removal rate after carrying out adsorption for 1-3 days. In addition, the material is simple to prepare and convenient to operate and has low cost. Visibly, the KOH activated active carbon has good economic and environmental benefits in removing the antibiotics in water body.

A preparation method of a polyether sulfone functional separation membrane supporting a dendritic polyamide-amine functional group includes the steps of: 1) performing chloroacetylation and aminationmodification treatment to polyether sulfone successively and preparing chloroacetylchlorine-diethylenetriamine-polyether sulfone separation membrane chips; 2) with methyl acrylate and ethylenediamineas main reagents, performing modification to the membrane chips by means of Michael addition and amidation reactions with plasma irradiation grafting synergistic technology; 3) preparing the polyethersulfone functional separation membrane supporting the dendritic polyamide-amine functional group via phase-transfer technology. The method is simple, wherein the grafting efficiency of the dendriticpolyamide-amine functional group is high. The functional group has large supporting quantity in the separation membrane, is stable in the separation membrane and is not liable to lose. The polyether sulfone functional separation membrane can remove heavy metals and phosphates in water body high-effectively and has a board application prospect in the field of water pollution control.

The invention discloses a method for treating mercury-containing wastewater by using modified blue-green algae. The method is characterized by comprising the following steps: (1) performing acidification modification treatment on blue-green algae, thus obtaining modified blue-green algae; (2) treating the wastewater by employing the modified blue-green algae; (3) detecting the supernatant fluid of the wastewater, and discharging the wastewater after qualification; and (4) recovering the blue-green algae, namely filtering the used modified blue-green algae, desorbing the blue-green algae in a desorbing agent for 1 hour, and filtering and refrigerating the modified blue-green algae. The modified blue-green algae raw materials used in the method come from eutrophic lakes and are easily obtained, mass propagation or dead algae in the lakes are reasonably utilized, the eutrophication phenomena can be reduced, and the treatment difficulty of the lake eutrophication is lightened; and moreover, the method for adsorbing and removing the mercury-containing industrial wastewater by utilizing the modified blue-green algae is simple in process and convenient to use.

The invention relates to a preparation method of activated carbon, and particularly relates to a method for preparing composite based activated carbon by utilizing straws and sludge. The method for preparing the straw-sludge composite based activated carbon includes the following steps: respectively carrying out 105 DEG C vacuum drying and crushing of undigested dewatered sludge and the reed straws; mixing the vacuum dried and crushed sludge and the vacuum dried and crushed straws in the step (1) according to the mass ratio of 1:1 to 4:1, activating with a 0.5 mol/L KOH, centrifuging, and drying; carbonizing the dried sample in a resistance furnace for 2 to 6 h under the N2 gas atmosphere and at the temperature of 600 to 800 DEG C, repeatedly washing the prepared crude sample with water for 3 to 4 times, carrying out low temperature drying to reach constant weight, and thus obtaining a sample S1; and dipping the sample S1 with hydrochloric acid and heating to boil for 30 to 60 s, cooling, repeatedly washing with water for 3 to 4 times, carrying out low temperature drying to reach constant weight, and thus obtaining the sample S2.

The invention discloses a surface-modified biochar adsorption material. The biochar adsorption material is biochar of which the surface is modified with amino. The preparation method comprises the following steps: S10, providing a biomass material, and carrying out high-temperature anaerobic cracking treatment on the biomass material to prepare biochar; and S20, placing the biochar in a reaction cavity of low-temperature plasma, vacuumizing until the air pressure in the cavity is stable, introducing a reaction gas containing ammonia gas, and performing surface modification on the biochar through low-temperature plasma discharge to prepare the biochar with the modified amino on the surface. The biochar adsorption material provided by the invention is applied to treatment of water body pollution, and pollutants such as heavy metal ions and radionuclide ions in water bodies can be effectively adsorbed and removed.

The invention belongs to the technical field of applications of new materials and specifically discloses an application of a covalent triazine framework (CTF) adsorption material with an excellent adsorption removal effect in removal of organic dyes in a water phase solution. The material has a good effect when used for adsorption removal of organic dye molecules in industrial wastewater, and the adsorption removal effect of the adsorption material against different types of the organic dye molecules is further considered under different acidic and alkaline conditions. The results show that the material has excellent adsorption capability against the organic dye molecules, the removal effect is particularly obvious against cationic dye molecules, and the material can also be recycled. The adsorption agent belongs to a polymer material, is environment-friendly and excellent in performance, and has industrial application prospects against industrial sewage treatment.

The invention relates to a fly ash-based adsorption material utilizing a fiber as a pore forming agent. Fly ash as aggregate, bentonite as a binder and paper making fibers as pore forming agents are extrusion-molded by a granulator, and then the granules are dried and then are sintered by an atmosphere sintering furnace. The fly ash-based adsorption material has a certain mechanical strength, a wide aperture distribution scope and a large specific surface area and can be used as an adsorption material and be widely used in water treatment. The fly ash-based adsorption material utilizing a fiber as a pore forming agent fully realizes waste recycling, has a low cost and a wide adsorption scope, can be used by simple and easy processes, can be regenerated easily, can be recycled and has a wide application range.

There is provided an adsorbent material having adsorptive removal properties of Cs and Sr in seawater, and a method for producing a crystalline silicotitanate suitable for the adsorbent material. The adsorbent material includes one selected from crystalline silicotitanates represented by Na₄Ti₄Si₃O₁₆.nH₂O, (Na_xK_(1-x))₄Ti₄Si₃O₁₆.nH₂O and K₄Ti₄Si₃O₁₆nH₂O wherein x represents a number of more than 0 and less than 1 and n represents a number of 0 to 8; and one selected from titanate salts represented by Na₄Ti₉O₂₀.mH₂O, (Na_yK_(1-y))₄Ti₉O₂₀.mH₂O and K₄Ti₉O₂₀.mH₂O wherein y represents a number of more than 0 and less than 1 and m represents a number of 0 to 10. The adsorbent material is produced by a method for producing a crystalline silicotitanate in which a silicic acid source, a sodium compound and/or a potassium compound, titanium tetrachloride, and water are mixed to obtain a mixed gel, and the mixed gel is subjected to a hydrothermal reaction.

The invention belongs to the field of materials and environmental protection and relates to a graphene oxide modified charcoal material. The graphene oxide modified charcoal material is prepared by steps: firstly, preparing straw charcoal; secondly, preparing 1,3,6,8-pyrene tetrasodium tetra-sulfonate aqueous solution, adding graphene oxide into 1,3,6,8-pyrene tetrasodium tetra-sulfonate aqueous solution, and ultrasonically treating to obtain graphene suspension, wherein a mass ratio of 1,3,6,8-pyrene tetrasodium tetra-sulfonate to graphene oxide is 1.8-2.5:1; thirdly, impregnating the straw charcoal into the graphene suspension, rinsing with deionized water, filtering, drying, slowly heating to 500-700 DEG C in an N2 atmosphere, and performing pyrolysis for 0.5-3h to obtain the graphene oxide modified charcoal material. The charcoal material integrates adsorption performances of charcoal and graphene oxide, has advantages of large adsorption capacity, high adsorption efficiency and the like, has great adsorptive removal effects on heavy metals in environments of soil and the like and is especially suitable for passivation of heavy metals in biogas residues or heavy metal contaminated soil.

The invention discloses a preparation method of modified blue-green algae biochar, wherein the preparation method comprises the steps: S1, washing blue-green alga cleanly, carrying out freeze drying,grinding, pulverizing the blue-green algae, and carrying out carbonization treatment in an inert atmosphere; grinding and sieving the blue-green algae powder, soaking the blue-green algae powder in anacid solution, washing with water to be neutral, and drying to obtain blue-green algae biochar; and S2, dissolving an iron-containing compound and the blue-green algae biochar in an ethanol aqueous solution, placing the solution on a stirrer, uniformly stirring and mixing, dropwise adding a reducing agent in an inert atmosphere, continuously stirring after dropwise adding is finished, carrying out centrifugal separation on the obtained mixed solution to remove supernate, and washing and drying the obtained solid to obtain the modified blue-green algae biochar. On one hand, the blue-green algae waste is used as the raw material, the raw material is rich and easy to obtain, and a new thought is provided for resource utilization of the blue-green algae waste; on the other hand, the preparedblue-green algae biochar loaded nano-iron is uniformly dispersed, the problems that blue-green algae is difficult to treat and utilize, nano-particles are prone to agglomeration and passivation and the like are effectively solved, and the arsenic adsorption and removal effect of the material is improved.

The invention discloses a method for treating dye wastewater through the cooperation of adsorption and magnetization separation technologies. Firstly, magnetized biochar is adopted for adsorbing dye pollutants in the dye wastewater, and then a dye solution obtained after adsorption treatment is subjected to magnetization separation treatment by a magnet. According to the method, by conducting surface magnetization on the biochar, an adsorption material can be quickly separated and recycled, and after magnetization is completed, the magnetic cotton straw biochar has a good adsorption and removal effect on dye (methylene blue) in the printing and dyeing wastewater; meanwhile, the magnetic material has good stability, the effective separation of the water treatment adsorbent can be completedthrough an external magnetic field, the treatment process is simplified, and secondary pollution is prevented.

A preparing method of an oyster shell powder-ferric oxide nanometer composite material is disclosed. The method includes 1) a step of soaking waste oyster shell with diluted hydrochloric acid for a certain period of time, washing the oyster shell with an acid to remove organic and inorganic impurities on the surface, cleaning the oyster shell with distilled water, then putting the oyster shell into a drying oven, drying the oyster shell, crushing the oyster shell, and then sieving the crushed oyster shell with a sieve having a size of 80-300 meshes to obtain oyster shell powder; and 2) a stepof adding the obtained oyster shell powder into a ferric nitrate solution having a concentration of 0.01-1.00 mol.L<-1>, soaking the oyster shell powder under stirring for 3-24 h, then performing filtration, drying an obtained product, and calcining the obtained product at 800-1100 DEG C for 2-10 h to obtain the nanometer composite material. The method is stable, reliable, simple and feasible. Thecomposite material is used for treatment of azo dye wastewater and has good adsorption performance on azo dye.

The invention provides a magnetic microsphere capable of adsorbing diclofenac sodium. The magnetic microsphere is prepared by the following steps: preparing nano Fe3O4 by a co-precipitation method, preparing a SiO2 coated magnetic nano particle Fe3O4@SiO2, preparing a chitosan compounded Fe3O4@SiO2 magnetic material, and preparing an ethylene diamine modified magnetic material. According to the preparation method, chitosan and magnetic particles are combined, then the microsphere is modified by ethylene diamine; the magnetic microsphere has more amino groups, the effect of adsorbing and removing diclofenac sodium in water is improved, moreover, the chitosan microsphere has a good magnetic responding performance, so the microsphere can be conveniently separated and recovered, and the magnetic microsphere is a green and sustainable absorbent.

The invention discloses high-strength and high-toughness graphene composite ceramic. The high-strength and high-toughness graphene composite ceramic comprise a green body and a glaze material, whereinthe green body is prepared from ferric oxide, anorthite, potassium feldspar, attapulgite, spodumene, graphene, nanometer titanium dioxide fiber powder, silicon carbide crystal whiskers, barium sulfate and glass microbeads; and the glaze material is prepared from kaolin, graphene, nanometer titanium dioxide fiber powder, bamboo charcoal powder, silicon carbide crystal whiskers, barium sulfate, glass microbeads, potassium feldspar, quartz sand, talcum powder, olivine, bamboo charcoal powder, ferric oxide, aluminum oxide, magnesium oxide, zirconium silicate, zinc oxide and lutetium oxide. A fiber reinforcing technology is introduced, use of the graphene is combined, and the barium sulfate and the glass microbeads are compounded, so that the dispersibility of the graphene is improved; according to proper proportion, the components can exert a remarkable synergistic effect and obviously enhance the strength and the toughness of the ceramic; furthermore, the obtained ceramic material has aremarkable adsorbing and removing ability on air pollutants and has excellent corrosion resistance; and the application range is wide, and the preparation method is simple and suitable for industrialized production.

The invention discloses a manganous-manganic oxide/ cerium oxide composite nanotube, a nanotube self-assembled film, and a preparation method and application thereof, which belong to the technical fields of inorganic nonmetallic materials and environment protection. A hydro-thermal synthesis technology and a redox precipitation principle are utilized for successfully designing and preparing the manganous-manganic oxide/ cerium oxide composite nanotube under a moderate reaction condition, and a self-assembly interweave characteristic of the composite nanotube is further utilized for preparing the self-assembled inorganic film. A composite nanotube material has an excellent adsorption and purification capability on toxic and harmful ions in water, and a favorable catalytic purification capability on air pollutants, and particularly, the characteristics of the self-assembled film of the composite nanotube material well solve the difficult problem that a traditional water purification material is difficult to recover.

The invention discloses a red porcelain water cup containing negative oxygen ions and far infrared rays and a manufacturing method. The red porcelain water cup is characterized by being manufactured from, by weight, 85-90% of red porcelain clay main materials, 5-10% of nanometer medical stone powder and 2-5% of nanometer negative ion powder, and is formed through raw material configuration, manual or molding moulage, splicing, finish machining, drying in the shade and firing. The red porcelain water cup can decompose hazardous substances such as pesticide in water and tea, can reduce and convert disinfector residues and halogenated compounds, adjusts the acid-base balance of drinking water, achieves healthy water drinking and healthy tea drinking, can also convert macromolecular water into micromolecular water and improves the healthy water drinking quality.

The invention provides a modified active carbon and a preparation method application thereof. The method comprises the following steps of: placing active carbon into a quartz pipe of a muffle furnace; filling nitrogen in the muffle furnace at room temperature for 1-2 hours, wherein the gas flow rate is 80-120ml/min; then heating the muffle furnace to 400-800 DEG C at the speed of 10 DEG C/min under the protection of the same nitrogen flow and maintaining for 1-4 hours; after the temperature is reduced to 25 DEG C, stopping filling the nitrogen; continuously filling air at the flow rate of 80-120ml/min for 1hour and taking out to obtain the modified active carbon. The modified active carbon is used as an adsorbent and used for removing organic pollutants in the process of water treatment, has the advantages of high purifying ability and long service life and particularly can solve the problem of poor maneuverability on high-concentration phenol endocrine distributing object polluted water by the traditional water treatment method.

The invention provides a method for removing heavy metallic salts in industrial waste water by using egg shells. The method comprises the following steps of: adjusting the pH value of the industrial waste water to 3 to 5; and adding more than 0.8g/100ml of egg shells to the industrial waste water to make the egg shells adsorb the industrial waste water at a temperature of between 15 and 40 DEG C for more than 105m. The method can effectively remove the heavy metal ions in the industrial waste water, so that the method can be widely used for treating various kinds of industrial waste water containing the heavy metallic salts.

The invention discloses a preparation method of a polypyrrole-modified corncob composite adsorbent, relates to absorbents applied to water treatment, and solves the problems of limited adsorption capacity and lack of regeneration capacity in a conventional adsorbent. The preparation method comprises the following steps: 1, washing blocky corncobs and drying to obtain dried corncobs; 2, dissolving pyrrole monomers in de-ionized water to obtain a pyrrole monomer solution; 3, putting the dried corncobs into the pyrrole monomer solution to obtain a mixed reaction liquid; 4, dissolving FeCl3.6H2O in the de-ionized water to obtain an FeCl3 solution and dropwise adding into the mixed reaction liquid to obtain reaction liquid containing modified blocky corncobs; 5, separating out the modified blocky corncobs from the reaction liquid, washing and drying to obtain the corncob composite adsorbent. According to the preparation method, the crop wastes-corncobs are used as raw materials, the cost is low, the mechanical strength of the materials is high, and the prepared modified corncob composite absorbent has a good treatment effect on Cr (VI) in the water and is convenient to recover.