49results about How to "Strong adsorption properties" patented technology

The invention relates to filler used for constructed wetland water treatment and a preparation method of the filler. The invention aims at providing a novel constructed wetland filler which is capable of realizing slowly releasing oxygen and reinforcing nitrogen and phosphorus removal and a preparation method of the filler. The filler used for constructed wetland water treatment is volcanic cinder particles which are loaded with a rare-earth nitrogen and phosphorus adsorbent and a slow-release oxygen material, and have particle diameters of 5-15mm. The filler can be used for increasing the sewage purifying capacity of the constructed wetland. And the preparation method has the characteristics of simple process, sufficient raw materials, low cost, and the like.

The invention provides a method for preparing a boropolysilicate aluminum iron-chitosan composite flocculant. The preparation method uses aluminum sulfate, iron sulfate, sodium silicate, sodium tetraborate and chitosan as raw materials, and first utilizes silicon sodium borate in sulfuric acid solution to prepare polysilicic acid; secondly, add aluminum sulfate, ferric sulfate, sodium tetraborate and chitosan acetic acid solution in polysilicic acid solution to prepare boropolysilicate aluminum iron-chitosan composite flocculation agent. The composite flocculant prepared by the preparation method of the present invention is a novel flocculant with high efficiency, environmental protection and low cost, and has the advantages of stable performance, good storage performance, convenient use and the like.

The invention discloses a filter additive for reducing the content of hydrocyanic acid in the smoke of a cigarette and a preparation method thereof. The preparation method comprises the following steps: mixing starch and transitional metallic salts, dipping the mixture with buffer solution of acetic acid, carrying out enzymolysis with diastatic enzyme, drying, crushing and screening to obtain metal dipping modified porous starch particles, namely the needed filter additive. When being applied to the filter of the cigarette, the particles not only have better selective removing for HCN, but also have no adverse influence on reduction of other harmful gases. As the amount of added metal is little, the filter additive has less influence on the flavor of the cigarette. The adsorption efficiency of the product is not reduced obviously after being stored for six months, even longer time. The invention has simple and convenient preparation technique, reliable quality and very stable attachment of transitional metallic ions, and can be applied to all the filters of the cigarettes with known forms.

The invention provides a preparation method of spinel-structure lithium titanate. The preparation method comprises the following steps: 1, taking metatitanic acid produced in a process of producing titanium dioxide with a sulfuric acid method; preparing the metatitanic acid into slurry A with de-ionized water; 2, adding calcining seed crystals, which are widely used in a process of producing rutile-type titanium dioxide with the sulfuric acid method, into the slurry A, wherein the mass ratio of TiO2 in the calcining seed crystals to TiO2 in the slurry A is (2 to 20) to 100; after uniformly stirring, filtering and washing with water; stopping water washing when the pH (Potential of Hydrogen) value is greater than 1.8; adding de-ionized water into a filter cake to prepare slurry B with the TiO2 concentration of 200g / L to 400g / L; 3, adding a lithium source into the slurry B according to the mole ratio of Li to Ti of 0.82 to 0.97; sufficiently and uniformly stirring to obtain slurry C; 4, conveying the slurry C into a rotary kiln; heating and calcining to finish dehydration, desulfurization and crystal form transformation to prepare the spinel-structure lithium titanate. According to the preparation method provided by the invention, all the methods are slurry processes, and dry-method crushing and grinding do not need to be carried out before the crystal form transformation is finished by heating so that energy consumption is low; a titanium source is cheap and easy to obtain.

The invention relates to a sulfonated sodium alginate grafted agarose gel chromatographic medium as well as a preparation method and application. The preparation method comprises the following steps:firstly, selecting the sodium alginate grafted agarose gel chromatographic medium with a suitable ion exchange capacity as a basic medium for carrying out sulfonic group modification; secondly, controlling the concentration of sodium hydroxide in an allyl bromide activation process; finally, determining the concentration of sodium pyrosulfite and determining the pH (Potential of Hydrogen) value ofthe solution and sulfonation time. According to the sulfonated sodium alginate grafted agarose gel chromatographic medium provided by the invention, the static saturated adsorption capability on lysozyme can reach 358mg / mL and the lowest dynamic binding capacity under a 10 percent penetration condition is also 100mg / mL or more. The medium has the advantages of simple preparation method and low cost, and has a wide application prospect in efficient separation and purification of protein.

The invention provides a preparing method of south red soil dry land nutrient dilatation conditioner. The conditioner is prepared from, by weight, 25-35% of raw material zeolite, 10-15% of coal cinder, 14-20% of carbonizational husks, 12-17% of coal ash, 17-23% of decomposed coal and 3-8% of polyacrylamide in a blending and pelleting mode. By means of the prepared conditioner, the adsorption capacity of soil to nutrients can be greatly increased, the adsorption ability of soil to nutrients can be enhanced, the physical structure of soil can be obviously improved, the soil acidiy can be adjusted, contradiction among soil water, air and nutrient substances is coordinated, and the conditioner can be widely applied to south red soil dry land and provide a good basis for the high and stable yield of crops.

A method for preparing a porous carbon-loaded graphene-coated nano-nickel particle wave-absorbing material, using algae as a carbon source, soaking it in a nickel salt solution, so that nickel ions enter the algae cells. After freeze-drying, it is subjected to low-temperature heat treatment, and the algae are converted into carbon, and the metal nickel salt is oxidized to nickel oxide; then the temperature is raised to continue high-temperature heat treatment, so that the nickel oxide is reduced to nickel, and the coating on the nickel nanometer is realized during the heat treatment process. The granular amorphous carbon is catalyzed and graphitized, and finally a composite material of porous carbon-supported graphene-coated nano-nickel particles is obtained. The invention uses algae as a carbon source, which is economical and practical, and uses the characteristics of rich pores in natural algae plants to uniformly disperse nickel on the carbon material; after heat treatment, a porous carbon material with a network structure is obtained, and the nickel particles coated with graphene are dispersed in the porous carbon material. The surface of the carbon material makes the material have excellent microwave absorption properties.

Provided are a modified nanometer bamboo charcoal mask and a manufacturing method thereof. The modified nanometer bamboo charcoal mask comprises an inner mask and an outer mask, wherein the inner mask is provided with a dismounting opening, and a filer layer is arranged in the dismounting opening. The inner mask and the outer mask of the mask and a filer layer base plate are made of an electrets melt-blowing polypropylene fiber non-woven fabrics, the filer layer uses chitosan as a capsule wall material, microcapsules are made from modified nanometer bamboo charcoal powder, beewax is used as an adhesive for arranging the microcapsules on the non-woven fabrics. The modified nanometer bamboo charcoal powder are modified by adopting nanometer titanium dioxide. The modified nanometer bamboo charcoal mask is green, environment-friendly, safe and efficient, has the broad-spectrum antibacterial effect and has good washability due to the fact that the beewax is used as the adhesive to arrange the microcapsules on the non-woven fabrics.