Active carbon composite polymer flocculant for water pollution

By preparing walnut shell biochar composites with metal hydroxides and coating them with polydopamine, combined with chitosan microspheres and acrylic acid copolymer grafting, the stability and removal efficiency issues of activated carbon and polymeric flocculants were solved, achieving highly efficient wastewater treatment.

CN120589900BActive Publication Date: 2026-07-21CHANGZHOU FANGTAI ENVIRONMENTAL ENGINEERING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGZHOU FANGTAI ENVIRONMENTAL ENGINEERING CO LTD
Filing Date
2025-07-28
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In existing technologies, activated carbon is prone to dissociation and has poor stability when used in combination with polymeric flocculants, resulting in limited wastewater treatment capacity, especially in the removal of heavy metal ions and dissolved pollutants.

Method used

Biochar was prepared from walnut shells and compounded with metal hydroxides to enhance adsorption performance. Then, polydopamine was used for coating to improve hydrophilicity. Chitosan was microsphereized and grafted with acrylic acid copolymers to enhance flocculation ability, and amination modification was used to improve compatibility.

Benefits of technology

It significantly improved the adsorption performance and flocculation rate of the complex, enhanced the removal effect of heavy metal ions and dissolved organic pollutants, and improved the wastewater treatment performance.

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Abstract

The application discloses a kind of activated carbon composite polymer flocculants for water pollution, it is related to wastewater treatment material technical field, the present application has prepared biochar using walnut shell, then biochar is compounded with metal hydroxide, the adsorption performance of compound is strengthened, subsequently using polydopamine is coated, its hydrophilic property is improved, can also enhance the chelation ability with heavy metal, further strengthen wastewater treatment performance.The present application is microspheroidized to chitosan, the specific surface area is significantly improved after microspheroidization, amine group, hydroxyl group and other groups on chitosan are reserved in microsphere, can graft acrylic acid copolymer more, can adsorb heavy metal ions and soluble organic pollutants, flocculation speed is fast, and wastewater treatment performance is good.
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