A porous carbon material for adsorbing heavy metals and a preparation method and application thereof

By preparing porous carbon materials and constructing three-dimensional hydrogels using monomers such as dopamine hydrochloride and then carbonizing them, the problems of low adsorption capacity and cycle efficiency of existing carbon-based adsorbent materials were solved, achieving efficient and stable adsorption of Fe/Co/Ni ions.

CN122006665BActive Publication Date: 2026-07-24SANYA INST OF OCEANOGRAPHY OCEAN UNIV OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SANYA INST OF OCEANOGRAPHY OCEAN UNIV OF CHINA
Filing Date
2026-04-14
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing carbon-based adsorbent materials suffer from limited adsorption capacity, uneven structure, and low recycling efficiency when adsorbing heavy metals, making it difficult to effectively remove Fe/Co/Ni ion pollution.

Method used

A three-dimensional hydrogel was constructed using monomers such as dopamine hydrochloride and N-hydroxymethylacrylamide under the action of a photoinitiator, and porous carbon materials were prepared by carbonization treatment to form abundant active sites and optimized pore structure, thereby improving adsorption performance and stability.

Benefits of technology

It achieves highly efficient adsorption of Fe/Co/Ni ions, exhibits high adsorption capacity and rapid adsorption kinetics, and maintains good regeneration performance and adsorption efficiency during multiple cycles.

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Abstract

The application provides a porous carbon material for adsorbing heavy metals and a preparation method and application thereof, and relates to the technical field of adsorbent preparation. The preparation steps of the porous carbon material include: S1, stirring hydrochloric acid dopamine and N-hydroxymethyl acrylamide in anhydrous ethanol, adding concentrated sulfuric acid for reaction, filtering, and washing until neutral to obtain DTA; S2, adding acrylamide, acrylonitrile, acrylic acid and 3-(acrylamidomethyl)-5-benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid into water to obtain a solution system, adding sodium hydroxide, the intermediate product DTA and 2-hydroxy-4-(2-hydroxyethoxy)-2-methylbenzophenone in sequence, carrying out ultrasonic treatment, irradiating under a mercury lamp light source, washing, and freeze-drying to obtain PAAAS-D; and S3, carrying out carbonization of the PAAAS-D after pre-oxidation treatment under a inert atmosphere to obtain CPAAAS-D. The porous carbon material has rich active sites and an optimized pore structure, and can efficiently adsorb Fe, Co and Ni heavy metal ions.
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