6results about How to "Fast adsorption kinetics" patented technology

The invention discloses gallium ion imprinted amidoxime-based macroporous resin as well as a preparation method and application thereof, and belongs to the technical field of functional polymer materials and separation. The method comprises the following steps: pre-assembling a gallium trichloride template and monomers such as acrylonitrile, generating monodisperse liquid drops by utilizing a microfluidic technology, polymerizing by combining ultraviolet light, eluting the template by hydrochloric acid, and performing amidoximation modification by a hydroxylamine hydrochloride alkaline solution, thereby obtaining the resin. The resin is a monodisperse spherical microsphere, has a macroporous structure, has high selective recognition capability and high adsorption capacity on gallium ions, is fast in adsorption kinetics and good in regeneration performance, and is suitable for selectively separating or enriching gallium ions from a complex solution system.

The application discloses a solar water evaporation and adsorption material, a preparation method and application thereof, and belongs to the technical field of wastewater treatment. A polydopamine modified zeolitic imidazolate framework material is stirred and reacted with a pre-oxidized nanocellulose solution and a polyvinyl alcohol solution to form a viscous liquid, the viscous liquid is transferred into a mold, and static bubble removal, freeze forming and freeze drying are sequentially performed, so that a solar water evaporation and adsorption material formed by pre-oxidized nanocellulose and polyvinyl alcohol and loaded with the polydopamine modified zeolitic imidazolate framework material is obtained. The solar water evaporation and adsorption material has the characteristics of high stability, and simultaneously has photo-thermal conversion function and rare earth ion adsorption activity. Solar radiation can be used to promote water evaporation, accelerate the mass transfer of rare earth ions in the aqueous solution and the combination of the adsorption active sites, so that the adsorption kinetics of the rare earth ions is accelerated, and the solar water evaporation and adsorption material can be used for rare earth wastewater treatment, especially low-concentration rare earth wastewater treatment.

The invention relates to the technical field of carbon dioxide adsorbents, in particular to an SBA-15 solid amine adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, carrying out vacuum drying activation on the SBA-15 carrier; s2, preparing a composite impregnation liquid: dissolving organic amine and PEG-200 in absolute ethyl alcohol together, and fully stirring to form a uniform and transparent solution; s3, adding an activated SBA-15 carrier into the composite impregnation liquid, and carrying out impregnation and aging treatment; and S4, carrying out gradient drying and curing on the impregnated and aged product to obtain the SBA-15 solid amine adsorbent. Polyethylene glycol (PEG) with a specific molecular weight is introduced as a functional additive to synergistically optimize an impregnation solvent and amine loading capacity, so that the dispersion state of amine is improved on the molecular level and the anchoring effect of the amine is enhanced, and the adsorption capacity, dynamics and stability are synergistically improved.

The application discloses a preparation method of a sulfonic acid-based porous organic polymer and application of the sulfonic acid-based porous organic polymer in adsorption of uranyl ions and trace metal ions. The preparation method comprises the following steps: firstly, benzylization modification is conducted on a cyclodextrin to obtain a benzylated cyclodextrin monomer; then, the benzylated cyclodextrin monomer is subjected to a Friedel-Crafts alkylation polymerization reaction with a linker under catalysis of a catalyst to construct a porous organic polymer with high crosslinking degree; and finally, chlorosulfonic acid is used for sulfonation modification to introduce high-density sulfonic acid group active sites. The obtained polymer combines the host-guest recognition ability of the cyclodextrin and the rapid mass transfer effect of the porous skeleton, and exhibits extremely fast adsorption kinetic response and excellent adsorption capacity. The material has simple preparation process and high stability, and is especially suitable for superfast extraction of ultra-low-concentration uranyl ions in seawater.

This invention relates to the field of solid waste treatment technology, specifically to a device for the harmless treatment of wastewater from solid waste: It includes a pretreatment unit, an electrochemical synergistic reaction tank, and a deep filtration assembly connected in sequence. In the first reaction zone, an anode plate is used to mineralize highly stable organic pollutants, while simultaneously altering the form of dissolved heavy metal ions through electrodeposition or valence state conversion. Next, a first ultrasonic transducer prevents electrode passivation and promotes the migration of pollutants to the electrode surface. Subsequently, the wastewater after electrochemical conversion enters the second reaction zone, where a magnetic adsorption packing layer efficiently adsorbs and immobilizes the converted heavy metal ions and organic intermediates in situ. Simultaneously, a second ultrasonic transducer group prevents the adsorption medium from agglomerating and enhances adsorption kinetics. Using this structure, efficient removal of dissolved heavy metal ions and highly stable organic pollutants is achieved, resulting in better treatment of wastewater from solid waste.

The invention provides a porous carbon material for adsorbing heavy metals as well as a preparation method and application thereof, and relates to the technical field of adsorbent preparation. The preparation method of the porous carbon material comprises the following steps: S1, adding dopamine hydrochloride and N-hydroxymethyl acrylamide into absolute ethyl alcohol, uniformly stirring, adding concentrated sulfuric acid, reacting, carrying out suction filtration, and washing to be neutral, so as to obtain DTA; s2, adding acrylamide, acrylonitrile, acrylic acid and 3-(acrylamide methyl)-5-benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid into water to obtain a solution system, sequentially adding sodium hydroxide, the intermediate product DTA and 2-hydroxy-4-(2-hydroxyethoxy)-2-methyl propiophenone, carrying out ultrasonic treatment, irradiating under a mercury lamp light source, washing, and freeze-drying to obtain PAAAS-D; and S3, carrying out heating pre-oxidation treatment on the PAAAS-D, and then, carrying out carbonization in an inert atmosphere, so as to obtain the CPAAAS-D. The porous carbon material provided by the invention has abundant active sites and an optimized pore structure, and can efficiently adsorb Fe, Co and Ni heavy metal ions.