A heavy metal chromium adsorbent material, its preparation method and application

By modifying zirconium-based/titanium-based/zinc-based metal-organic framework materials NH2-Zr/Ti/Zn-MOFs on polypropylene (PP) meltblown microfibers, an integrated composite microfiber felt for the catalytic reduction and adsorption of heavy metal chromium was prepared. This solved the problems of incomplete removal and secondary pollution of heavy metal chromium in wastewater treatment, achieved efficient reduction and adsorption effects, and can be recycled into non-toxic materials.

CN117899832BActive Publication Date: 2026-06-02SICHUAN RES INST OF SILK SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN RES INST OF SILK SCI
Filing Date
2023-12-29
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies for treating heavy metal chromium in wastewater suffer from incomplete removal, high energy consumption, and the generation of toxic sludge. Traditional adsorbents are difficult to recycle and cause secondary pollution.

Method used

A composite ultrafine fiber mat integrating photocatalytic reduction and adsorption of heavy metal chromium was prepared by modifying polypropylene (PP) meltblown ultrafine fiber membranes with aminated zirconium-based/titanium-based/zinc-based metal-organic framework materials NH2-Zr/Ti/Zn-MOFs, and then coating NH2-Zr/Ti/Zn-MOFs onto the PP ultrafine fiber network through an in-situ self-assembly process. This mat achieves both photocatalytic reduction and adsorption functions.

Benefits of technology

It achieves efficient photocatalytic reduction and adsorption of heavy metal chromium, reduces toxicity, and transforms it into non-toxic material through recycling, solving the recycling problem and secondary pollution problem of traditional adsorbents.

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Abstract

This invention relates to a heavy metal chromium adsorbent material, its preparation method, and its application. The adsorbent material is an integrated composite ultrafine fiber mat for catalytic reduction and adsorption of heavy metal chromium. The composite ultrafine fiber mat comprises a photocatalytic reduction functional layer, a transition layer, and an adsorption functional layer; the photocatalytic reduction functional layer is NH₃. 2‑ This composite microfiber felt, consisting of a Zr / Ti / Zn-MOFs modified PP microfiber mesh, an adsorption functional layer of Fe / Cu / Zn-MOF modified PP microfiber mesh, and a transition layer of one or more of wood pulp / PP bicomponent meltblown fabric, bamboo short fiber / PP bicomponent meltblown fabric, and viscose short fiber / PP bicomponent meltblown fabric, enhances the functionality of heavy metal chromium catalytic reduction / adsorption materials, exhibiting both photocatalytic reduction detoxification and adsorption fixation effects.
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