4results about How to "Increase adsorption sites" patented technology

The present application belongs to the technical field of high-value utilization of mineral resources and water treatment adsorption separation materials, and relates to a sepiolite-based lithium ion imprinting polymer, a preparation method and application in adsorption and separation of lithium ions in low-grade brine. The sepiolite is activated and pretreated, mixed with a lithium ion template, a functional monomer, a crosslinking agent and an initiator in a solvent system, and then subjected to a polymerization reaction, elution of the template ion, filtration, washing and drying to obtain the sepiolite-based lithium ion imprinting polymer. The sepiolite-based lithium ion imprinting polymer has good structural stability, lithium ion recognition selectivity and cyclic regeneration performance, and is suitable for efficient enrichment and separation of lithium ions in low-grade brine.

The application discloses a system and process for removing perfluorooctanoic acid by integrating coagulation sedimentation and modified activated carbon adsorption, and belongs to the technical field of water pollution treatment. The system comprises a container frame, a support frame is arranged on the upper portion of the container frame, an adjusting tank, a coagulation sedimentation tank and a modified activated carbon adsorption tank are sequentially arranged on the bottom of the container frame in the transverse direction and are communicated through pipelines, a first booster pump and an electromagnetic flowmeter are arranged on the pipeline between the adjusting tank and the coagulation sedimentation tank, a second booster pump is arranged on the pipeline between the coagulation sedimentation tank and the modified activated carbon adsorption tank, and the backwashing water outlet of the modified activated carbon adsorption tank and the water inlet of the coagulation sedimentation tank are communicated through a backwashing water return pipeline. The application adopts integrated and modular design and is provided with a closed loop return system, so that the removal rate of PFOA in wastewater can be effectively improved, and the problems of limited activated carbon adsorption capacity and difficult treatment of backwashing wastewater are solved.

This invention discloses a cubic bifunctional adsorbent material, its preparation method, and its applications. The preparation method includes the following steps: calcining a zeolite imidazole framework at a temperature above 800°C under an inert atmosphere to obtain the cubic bifunctional adsorbent material. The cubic bifunctional adsorbent material of this invention can simultaneously adsorb sulfonamide antibiotics and heavy metals. It also possesses a large specific surface area, numerous adsorption sites, abundant pore structure, large pore volume and diameter, and high adsorption capacity. It is a novel bifunctional adsorbent with excellent performance. When used to treat complex wastewater containing sulfonamide antibiotics and heavy metals, it can effectively remove these substances from the wastewater, demonstrating high practical value and promising application prospects. The preparation method of this invention also has advantages such as simple process, convenient operation, low cost, economic safety, and ease of promotion. It plays a significant role in promoting the large-scale preparation and industrial application of cubic bifunctional adsorbent materials.

The application discloses a hydrogel with a directional conical porous structure and a preparation method thereof, and belongs to the technical field of atmospheric water collection.The directional conical porous structure hydrogel with atmospheric water collection capacity is prepared by first preparing a uniform sodium alginate solution and an acid solution respectively, then pouring the sodium alginate solution into a mold, adding the acid solution, and finally obtaining the hydrogel with the directional conical porous structure through an acid-induced phase separation process.Compared with traditional hydrogels, the hydrogel obtained by the application not only has a rapid moisture absorption-desorption efficiency, but also has excellent cycle stability.In a plurality of moisture absorption-desorption cycles, the hydrogel can maintain a high moisture absorption amount, reduce moisture absorption salt loss, and prolong the service life of the material; and the preparation process of the application is simple, the cost is low, the environmental friendliness is high, and industrial production can be realized.