39results about How to "High adsorption removal rate" patented technology

The invention discloses a preparing method of a manganese oxide-charcoal composite adsorbent, which comprises following steps: (1) air-drying or drying a biomass raw material, pulverizing into powder and uniformly mixing for standby; (2) taking potassium permanganate or sodium permanganate as a pre-treating agent, and performing pretreatment on the biomass raw material by adopting an equivalent-volume impregnation method; (3) drying, pyrolyzing and carbonizing the pretreated material to prepare the composite adsorbent material; (4) soaking the obtained composite adsorbent material with inorganic acid, and washing and drying to obtain the manganese oxide-charcoal composite adsorbent finished product. The method is simple, the prepared composite adsorbent is suitable for an adsorption method as an adsorbent for treating heavy metal ion-containing waste water, and has an advantage in the aspect of treating the acid heavy metal ion waste water particularly. The adsorbent can also serve as a conditioner for soil polluted by heavy metal ions, and achieves an action of controlling the absorption of plants to heavy metal ions by adsorbing the heavy ion ions after being applied into the soil.

The invention provides a riverway channel water quality biologically-intensifying device and application thereof, belonging to the field of water treatment. The riverway channel water quality biologically-intensifying device comprises a transferring shaft and a filler area, wherein with the transferring shaft is positioned in the center of the riverway channel water quality biologically-intensifying device; the filler area encloses the transferring shaft. The riverway channel water quality biologically-intensifying device is characterized in that an upper fixed plate (3), a lower fixed plate and the transferring shaft (1) are integrated into a whole by taking the transferring shaft (1) as a center; an impeller (5) is fixed on the lower fixed plate; the filler area (4) is divided into fourregions through a grating sieve mesh (6), and biological fillers are filled in the regions. The integral riverway channel water quality biologically-intensifying device is driven to move by taking water flows as a driving force when being applied to the treatment of riverway channel water bodies, prevents the fillers from washing away by combining the fixed biological fillers with suspension fillers, can achieve the effective elimination and the synchrous denitrification of COD (Chemical Oxygen Demand), achieves the moving bed effect and also greatly enhances the mass transfer rate of nutrient substances and dissolved oxygen; and in addition, the riverway channel water quality biologically-intensifying device can carry out the treatment aiming at the pollution conditions of different water layers of riverway channels and also has the advantages of energy saving, environmental protection, low acquisition cost and operation cost, and the like.

The invention relates to the field of sewage treatment, in particular to zeolite synthesized from fly ash and a method for treating high-concentration ammonia-nitrogen wastewater by zeolite. The preparation method of zeolite comprises the step of pretreatment, that is, fly ash is washed and pickled sequentially, and washed-pickled fly ash is obtained; particularly, during washing, the fly ash is evenly mixed with pure water and stirred at 15-30 DEG C for 48 h, and washed fly ash is obtained by solid-liquid separation; during pickling, the washed fly ash and a 2 mol/L HCl solution are mixed ina volume ratio of 1:9, the mixture is stirred at 80 DEG C for 1 h, then solid-liquid separation, washing with water, washing with alcohol and drying are performed, and the washed-pickled fly ash is obtained. Zeolite is pretreated by pickling and water washing pretreatment, so that the ammonia-nitrogen removal rate of zeolite is higher than that of zeolite pretreated by pickling only, and is much higher than that of zeolite pretreated by water washing only; compared with direct pickling, the consumption of hydrochloric acid is reduced by 18.18% and the preparation cost is reduced.

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 application provides a removal device and a removal method for volatile organic compounds in industrial waste gas, wherein the removal method mainly includes five steps: pretreatment of waste gas, adsorption by high-silicon molecular sieve, oxidization by ozone, discharge of waste liquid, and discharge of purified gas. The removal method has reasonable design, simple process and convenient operation and can completely remove the volatile organic compounds.

The invention discloses a novel and high-efficiency composite adsorption material prepared by loading lotus root starch on mullite fibers, and relates to the field of water treatment. The invention also discloses a method for removing permanganate acid radicals from water by using the mullite fibers loaded with the lotus root starch. By the method, the permanganate acid radicals in the water can be adsorbed and removed by the mullite fibers loaded with the lotus root starch under the conditions of optional pH values. An adsorption method is adopted; and compared with the traditional adsorption material, the composite adsorption material is low in cost and suitable for treating high-concentration wastewater. Besides, the composite adsorption material has the characteristics of large specific surface area, high adsorption efficiency, readily available materials, high-temperature resistance, high recycling rate and the like. Therefore, good environmental and economic benefits can be achieved when the permanganate acid radicals in the wastewater are removed by the composite adsorption material.

The invention relates to the field of deep disposal process for biochemical tail water of the chemical industry, in particular to a deep disposal process for biochemical tail water of the chemical industry. A disposal system includes a pH adjusting pool, a PAC reactor and a membrane separating device which are connected sequentially. Under aeration condition, through the double function of PAC adsorption and micro-biological degradation, removal of refractory organics in the biochemical tail water of the chemical industry is achieved, and fast regeneration and recycling of PAC are achieved byusing dominant bacterial groups to degrade pollutants; the regeneration period is short, the load impact resisting capability is great, operation management is convenient, the running expense is low,and meanwhile a certain detoxification function is achieved; the sludge settling performance is excellent, basically no residual sludge is generated, and discharged water can reach the first-level A emission standard of the pollutant emission standard for urban sewage treatment plants (GB18918-2002).

The invention relates to the field of biological enzyme deodorants, in particular to a composite biological enzyme deodorant and a preparation method thereof. The composite biological enzyme deodorantcomprises a solid component, wherein the solid component comprises the following components in parts by weight: 5-12 parts of a composite bio-enzyme preparation and 30-50 parts of modified blast furnace slag. The composite biological enzyme deodorant also comprises a liquid component, wherein the liquid component comprises the following components in parts by weight: 0.1-0.5 part of sodium ligninsulfonate, 0.05-0.2 part of polydimethyldiallylammonium chloride and 40-80 parts of deionized water. By combining the existing physical deodorization, chemical deodorization and microbial deodorization methods, the physical, chemical and microbial three-in-one composite biological enzyme deodorant is prepared.

The invention discloses an artificial island for riverway water quality purification and ecological restoration, and relates to the technical field of ecological management, and the artificial island is composed of a suspended filler area located in the center of an artificial island body and a near-natural structure area surrounding the suspended filler area. The suspended filler area can adsorb and remove heavy metals such as Cr, Pb and Cd in urban river water, and pollutants such as COD, N and P in the water can be effectively reduced. A good river hygrophilous and terrestrial ecological environment is built in the area close to the natural structure, and an environment space meeting habitat and reproduction of organisms such as amphibians, reptiles, insects and birds and growth of shrubs and small arbors is built. The natural stone layer serving as a hard framework of the artificial island is provided with a large number of holes, a place for avoiding natural enemies is provided for small fishes, small mollusks and juvenile fishes, and the number of urban river organism populations can be increased.

Belonging to the field of environmental protection, the invention in particular relates to a multi-level structure calcite, a preparation method and application thereof. The multi-level structure calcite provided by the invention is formed by calcination of the precipitate obtained by microwave reflux reaction of urea and a soluble organic calcium salt in a solvent. The method provided by the invention takes the soluble organic calcium salt and urea as the reactants, and utilizes the microwave reflux-calcination two-step process to prepare the multi-level structure calcite with large specificsurface area and abundant pore channels. The multi-level structure calcite provided by the invention has the characteristics of no toxicity, environmental friendliness, cheap raw materials, and simpleand fast preparation process. The multi-level structure calcite has large adsorption capacity and good structural stability, can show a high adsorption removal rate on nano-silver in a wide pH range,and is not interfered by impurity ions. In addition, the multi-level structure calcite adsorbing nano-silver also has good catalytic performance, and can be used as a catalyst, thus providing a new way for the sustainable application of recovered nano-silver.

The invention relates to the technical field of industrial wastewater treatment, and discloses a modified biological activated carbon adsorbent for removing Cr (VI). The adsorbent is prepared from the following raw materials in parts by weight: 1-3 parts of AlCl3, 2-6 parts of MgCl2, 25-30 parts of clean and dry coconut shell and a NaOH saturated solution. The invention further provides a preparation method and device of the modified biological activated carbon adsorbent for removing Cr (VI), and in addition, the invention further provides application of the modified biological activated carbon adsorbent for adsorbing and removing Cr (VI) in wastewater. The preparation process of the modified biological activated carbon adsorbent is simplified, and the modified biological activated carbon adsorbent has higher adsorption capacity on Cr (VI) in wastewater, is large in adsorption capacity, short in adsorption time, low in raw material cost and better in regeneration performance and has better adsorption performance and separation performance.

The invention relates to nano-porous copper oxide and a preparation method and application thereof in garbage stink. The preparation method comprises the following steps: stirring an organic copper salt and an aromatic solvent at 60-80 DEG C, mixing to form a first mixed solution, uniformly mixing organic alcohol and water to form a second mixed solution, adding the second mixed solution into thefirst mixed solution, heating to react while stirring, and drying by distillation to obtain a precursor, wherein the aromatic solvent is at least one of benzene, methylbenzene, dimethylbenzene and ethylbenzene, and calcining the precursor to obtain the nano-porous copper oxide. The nano-porous copper oxide prepared by the method disclosed by the invention has certain lipophilicity and has a relatively good adsorption removal effect on sulfur-containing organic compounds when being applied to garbage odor, and the adsorption removal rate reaches 95% or above.

The invention discloses a method for reducing the content of phenylalanine in a product, and belongs to the field of food processing. Protein-containing products are used as raw materials, hydrolysate obtained through enzymolysis is adsorbed through macroporous resin, and the removal rate of phenylalanine in the protein hydrolysate after adsorption through macroporous non-polar adsorption resin can reach 15%-90% by adjusting the adsorption temperature, the pH value of adsorption liquid and the adsorption time. The resin adsorption specificity is high, the removal rate of phenylalanine in the obtained product is high, the defects that the adsorption range of traditional activated carbon is wide, nutrient substances are lost and the like are overcome through resin adsorption, the operation process is simple and convenient, and the method is suitable for industrial production; and the method has the potential of being used for preparing special medical purpose formula food or health care products for patients suffering from phenylketonuria and the like.

The invention discloses a chitosan/gamma-AlOOH composite thin film for absorbing Pb(II) in water and a preparation method and an application thereof. The method comprises the following steps: firstly,preparing gamma-AlOOH sol, mixing with chitosan sol and then adding glutaraldehyde to cross-link it; finally, casting and forming the composite sol and drying to obtain the chitosan/gamma-AlOOH composite thin film. Compared with single gamma-AlOOH thin film and chitosan film, the chitosan/gamma-AlOOH composite thin film has higher adsorption capacity, higher adsorption rate and stronger acid resistance to Pb (II) in water, the adsorption capacity on 10 mg/L Pb (II) is 9.67 mg/g, and the removal rate was 96.75%. The residual concentration of Pb (II) in water could be reduced to 0.33 mg/L, which met the national discharge standard of Pb (II) in industrial wastewater.

The invention belongs to the technical field of waste gas treatment, and particularly relates to a waste gas treatment device and method for recovering epoxy chlorohydrocarbon. In order to solve the technical problems that an existing epoxy chlorohydrocarbon waste gas treatment device is low in epoxy chlorohydrocarbon recovery rate and the content of epoxy chlorohydrocarbon in purified gas is prone to exceeding the standard, a water removal unit is added on the basis of an existing device, it is guaranteed that epoxy chlorohydrocarbon does not make contact with water vapor, a hydrolysis reaction is avoided, the recovery efficiency of epoxy chlorohydrocarbon is guaranteed, and the recovery efficiency of epoxy chlorohydrocarbon is improved. Meanwhile, three-tank adsorption and two-tank standby are adopted, so that two clean adsorption tanks are always available in the adsorption process; in addition, two condensation systems are arranged, so that the condensation efficiency can be improved to the maximum extent, the organic matter transfer efficiency is improved, and the requirements of waste gas purification and emission are met.