46results about How to "Adsorption does not affect" patented technology

The invention discloses cyclodextrin modified nano-silver hydrogel, and a preparation method and an application thereof. The cyclodextrin modified nano-silver hydrogel contains 0.1%-0.4% by mass of nano-silver particles modified by in-situ reduction of cyclodextrin, the nano-silver particles are uniformly dispersed, the tensile strength of the cyclodextrin modified hydrogel is 3.5-6 MPa, and the relative standard error for measuring a molecular surface scanning Raman signal is lower than 10%. The preparation method comprises the following steps: (1) uniformly mixing cyclodextrin with a silver salt aqueous solution to obtain a mixture, and heating under an alkaline condition to react to obtain cyclodextrin modified nano-silver gel; and (2) adding a gelator, and preparing the cyclodextrin modified nano-silver hydrogel via a frozen gel forming method. The cyclodextrin modified nano-silver hydrogel provided by the invention is good in uniformity, strong in repeatability, good in mechanical property, sensitive in detection, simple to prepare and mild in reaction, and is used as a surface enhanced Raman substrate.

The invention discloses a curing agent and method for heavy metal in polluted soil. The curing agent for heavy metal in polluted soil is characterized by comprising the three components in percentage by weight: 33-40% of pulverized fuel ash, 34-51% of lime and 16-33% of peat. When the curing agent is used for treating the polluted soil, the curing method comprises the steps of sufficiently mixing the curing agent and heavy metal polluted soil according to the ratio of 1:(10-20) (weight ratio); then, adding water accounting for 40% (weight ratio) of the mixture; and then, sufficiently stirring and mixing. The curing agent for heavy metal in polluted soil, disclosed by the invention, is prepared by taking natural minerals as raw materials, so that no secondary pollution is caused, the soil fertilizer efficiency can be effectively improved while the heavy metal is cured, and the technical problems that the pH value of the soil is remarkably changed and the soil is hardened in the existing chemical remediation method are solved.

The invention relates to a beneficiation method for low-grade difficult-to-treat scheelite, and the beneficiation method can be applied to obtain tungsten concentrates from the low-grade difficult-to-treat scheelite containing calcite and fluorite. The beneficiation method comprises the steps of ore preparation and ore grinding, gravity separation by a table concentrator and re-grinding, desulphurization by flotation, roughing, scavenging and concentrating. According to the beneficiation method, a novel inhibitor YFW-12 is developed, and the inhibitor can reduce the adsorption quantity, on the surface of the calcite and the surface of fluorite, of a collecting agent without affecting adsorption, on the surface of the scheelite, of the collecting agent, has a capability of selective inhibition of the calcite and the fluorite, and is non-toxic and is low in cost. A novel collecting agent BF-01 is developed, and the collecting agent is high in collecting capability and is good in environmental adaptation. The novel inhibitor YFW-12 and the novel collecting agent BF-01 are utilized to realize efficient utilization of the scheelite containing the calcite and the fluorite, so that economic benefits are remarkable.

The invention discloses an electrostatic dust removal device, which includes an outer box body, an air inlet pipe and an air outlet pipe. The outer box body has a barrel-shaped structure. By the abovetechnical scheme, after a fan guides dust into the air inlet pipe, the dust is preliminarily filtered by an activated carbon filter screen and then enters the outer box body; an electrostatic field is generated between a discharge electrode and a dust collecting plate, and the preliminarily filtered dust particles are charged and adsorbed onto the dust collecting plate; a water pump is turned on,an atomizing nozzle sprays atomized water vapor to adsorb the dust particles into the electrostatic field generated between the discharge electrode and the dust collecting plate, and the atomized water with the dust particles flows into a sewage discharge tank under the influence of gravity; when the dust collecting plate is humid, the water pump is turned off, and dry hot air is generated through the fan and an electric heating wire, so as to quickly dry the dust collecting plate. Through the embodiment of the invention, dust particles can be adsorbed, and the electrostatic field generated between the discharge electrode and the dust collecting plate is not affected, and a cleaning effect on the dust collecting plate is also achieved; and a water film can be formed on the dust collectingplate, the adsorption effect of the dust collecting plate is enhanced, and the dust collecting plate that is too humid also can be dried.

The invention discloses a preparation method of a lanthanum modified activated carbon adsorption material, and relates to the technical field of biomass material adsorption. The invention aims to solve the problems of low adsorption efficiency, low selectivity and low recovery rate of the existing lanthanum modified phosphate adsorption material. The method comprises the following steps: 1, mixing lanthanum chloride hexahydrate with activated carbon, adding water and stirring to obtain a mixed solution A; 2, dispersing the mixed solution A in glycerol to prepare a mixed solution B; and 3, carrying out a hydrothermal reaction on the mixed solution B, centrifuging and washing the product, and freeze-drying. The method is simple and low in cost; the form of the activated carbon is kept good, the loaded La nanoparticles form oxygen vacancies on the surface of the activated carbon to increase active sites on the surface of the material, and the adsorption efficiency of phosphate is improved by utilizing the synergistic effect of the two components and the specific affinity of La to the phosphate; and the material shows good phosphate adsorption performance and selectivity in a relatively large pH range, and the regeneration rate is high. The material is suitable for adsorbing phosphate in sewage.