8results about How to "Increase the adsorption point" patented technology

The invention discloses a uranium mine tail water comprehensive treatment method, and relates to the field of radiation-containing wastewater comprehensive treatment, and the uranium mine tail water comprehensive treatment method comprises the following treatment steps: (1) pretreatment: filtering large particle impurities in uranium mine wastewater, and adjusting the pH value of the wastewater to 5-7; (2) concentration treatment: performing NF treatment on the pretreated wastewater to obtain first-stage concentrated water and first-stage produced water, and performing RO treatment on the first-stage produced water to obtain second-stage concentrated water and second-stage produced water; and (3) adsorption and precipitation treatment: collecting the primary concentrated water in the reaction tank, mixing the primary concentrated water with the secondary concentrated water to obtain high-concentration uranium-containing wastewater, adding modified biochar which is loaded with Ca3 (PO4) 2 into the reaction tank, and fully reacting and adsorbing. The uranium content removal rate of the produced water after two-stage membrane concentration can reach about 98%, the COD removal rate is almost 100%, and the hardness removal rate can reach about 96%; after full adsorption and precipitation of the modified biochar, the uranium content removal rate of effluent in the reaction tank can reach about 92%, the COD removal rate can reach about 90%, and the hardness removal rate can reach about 87%.

The invention discloses a preparation method of a copper-doped cerium oxide gas sensitive material, a gas sensor and application, the preparation method of the gas sensitive material comprises the following steps: adding cerium salt and copper salt into a mixed solution of ethanol and DMF or ethanol and deionized water, and stirring to form a transparent solution; adding PVP (Polyvinyl Pyrrolidone) into the solution, and stirring to form viscous liquid; performing electrostatic spinning on the viscous liquid to obtain nanofibers; and calcining the nano fiber to obtain the Cu doped CeO2 nano tube. According to the method, the in-situ Cu-doped CeO2 nanotube is prepared through electrostatic spinning-calcination, due to the oxygen storage performance and the Cu doping effect of CeO2, in the process of dynamically detecting the target gas H2S, the working temperature of the synthesized sensitive material is reduced, the good response-recovery characteristic can be kept in various oxygen content environments, and the sensitivity is high. And a new path is opened up for developing a novel metal oxide semiconductor gas sensor adapting to a complex environment.

The present invention belongs to the technical field of wastewater phosphorus removal, and provides a modified phosphogypsum composite material, a preparation method and an application thereof. The present invention comprises the following steps: after the treated phosphogypsum and a quaternary ammonium salt cationic surfactant are mixed, mechanical activation is performed to obtain the modified phosphogypsum composite material. The present invention mixes the phosphogypsum and cetyltrimethylammonium bromide, and adopts a mechanical activation method. Under the action of mechanical force, the positively charged ions of cetyltrimethylammonium bromide can not only exchange ions with inorganic cations on the surface of the phosphogypsum, but also strongly interact with the negatively charged surface of the phosphogypsum through electrostatic attraction and hydrophilic action, and change the original properties of the surface of the phosphogypsum, that is, the hydrophilicity is converted into hydrophobicity, and the phosphogypsum is combined with the surfactant, so as to realize the composite optimization of the physical surface and chemical properties of the modified material, and can efficiently purify the wastewater of the phosphorus chemical industry under high concentration.

The invention relates to the field of wastewater treatment, in particular to a copper-containing oxide loaded carbon felt electrode material and a preparation method and application thereof. According to the preparation method, a modified carbon felt electrode material containing amidoxime groups, acylamino groups and carboxyl groups is prepared by carrying out alkaline hydrolysis on a carbon felt electrode material loaded with amidoxime, and the copper-containing carbon felt electrode material is prepared by carrying out electrodeposition treatment on copper-containing wastewater by using the modified carbon felt electrode material containing amidoxime groups, acylamino groups and carboxyl groups. And finally, preparing a carbon felt electrode material loaded with a copper-containing oxide by using the oxidized copper-containing carbon felt electrode material, so that the combination of the copper-containing oxide and the carbon felt is realized, the electro-catalytic degradation capability of the electrode material is enhanced, and the electrode material with a relatively good electro-catalytic degradation effect on dye wastewater is prepared. Therefore, the technical problem that an existing electrode material is poor in electro-catalytic degradation effect on dye wastewater is solved.

The application discloses a preparation method of a ZIF / LDH loaded biochar composite adsorbent and application thereof, and comprises the following steps: (1) mixing, calcining and washing and drying pretreated corn stalks and alkali to obtain biochar BC; (2) mixing, washing, drying and calcining a certain proportion of the biochar BC and acetate, then mixing with 2-methyl imidazole, aging, and washing and drying to obtain BC / ZIF; and (3) immersing a certain amount of BC / ZIF in a nitrate solution, stirring, standing, washing and drying to obtain a BC / ZIF8 / LDH composite adsorbent. The composite adsorbent has a layered and open structure, a large specific surface area, a large number of adsorption sites, and a nitrosamine precursor removal rate of more than 95%; has a good binding capacity and selective adsorption on small-molecule amine, histidine, protein and other nitrogen disinfection by-product N-DBPs precursors; has good dispersing performance, high utilization rate of LDH metal, stable structure, good reaction activity and good repeated use effect; and has a wide source of raw materials, low price, low production cost and high economic benefit.

The present invention provides a low-odor and aging-resistant flame-retardant recycled polypropylene material and a preparation method thereof, wherein the flame-retardant recycled polypropylene material comprises the following components: recycled polypropylene resin, composite adsorbent, modified Al-MOFs, auxiliary antioxidant, lubricant and optional filling material. The present invention utilizes Al-MOFs material to modify the main antioxidant, so that the antioxidant is stably and evenly dispersed in the recycled material, and is not easy to migrate to the surface of the material and cause loss, so that the recycled material has the ability of aging resistance and low odor at the same time; by adding fly ash to graft and modify carbon nanotubes, the specific surface area and adsorption points of fly ash are increased, the dispersion of carbon nanotubes is effectively improved, and while taking into account the odor and aging resistance, the horizontal combustion rate of the composite material is effectively reduced, and the comprehensive performance is excellent.

The invention belongs to the technical field of molecular sieve catalyst molding, and discloses a general molecular sieve catalyst carrier molding method, which comprises: synthesizing a molecular sieve raw material; performing gel crystallization; forming is conducted; aging is performed; according to the technical scheme, multi-stage crystallization treatment is carried out, and the temperature, time and temperature increase rate of each stage of crystallization treatment are limited, so that the growth rate and final size of crystals can be controlled, the crystal form can be better controlled, and most of crystal impurities can be removed; morphological control on the molecular sieve is improved, and the performance of the finally formed molecular sieve is improved; tetrapropylammonium hydroxide and metal salt are added, so that formed metal complex ions are extremely easy to combine with hydroxyl on the surface of the molecular sieve, and subsequent crystallization is facilitated; the pore channel smoothness of the molecular sieve is ensured by optimizing the whole steps, and the structural strength of the molecular sieve is improved.

This invention belongs to the field of metal end cap processing technology, specifically an automatic feeding device suitable for metal end cap processing. It includes a feeding conveyor belt for conveying and feeding metal end caps. A transfer device is provided on one side of the feeding conveyor belt for conveying and transferring stacked metal end caps. A picking arm is provided between the transfer device and the feeding conveyor belt for moving metal end caps placed in the transfer device onto the feeding conveyor belt. During the picking and feeding of metal end caps, the fixing and separating components work together to pick up and feed multiple stacked metal end caps one by one, avoiding the situation where multiple end caps stick together and are fed simultaneously. Furthermore, the mechanized separation drive, compared to manual separation, not only saves manpower but also improves separation efficiency, making it more conducive to automatic feeding operations during metal end cap processing.